2.8.2.10. Block 18 — PMR4IN — PRIMAR-4 Floating-Point Input

1

TMDBP4

s

Time when IDBPR4 is set to IDBP4N. (See IDBPR4 and IDBP4N).

2-41

FLOSSL (ISGL)

kg/s

Initial flow rate in liquid flow segments. The value input for the single segment representing all channels (except the bypass channel) is not used.

42-81

ZINL (ISGL)

m

Height of inlet to liquid segment.

82-161

CVLMLT (M,ISGL)

Flow rate multiplicity factors at liquid segment ends. M=1 at inlet, M=2 at outlet.

162-301

ZOUTEL (IELL)

m

Height at outlet of the liquid element. Note: ZOUTEL(IELL) is also the height at the inlet of element IELL+1 if IELL+1 is in the same segment.

302-441

XLENEL (IELL)

m

Length of element. Must be greater than zero. (See comment for all channels in FLOSSL).

442-581

AREAEL (IELL)

m^2

Cross-sectional flow area of liquid elements. Must be greater than zero. (See comment for all channels in FLOSSL).

582-721

DHELEM (IELL)

m

Hydraulic diameter of liquid element. Must be greater than zero.

722-861

ROUGHL (IELL)

m

Pipe surface roughness, for friction factor. Must be greater than or equal to zero.

862-1001

BENDNM (IELL)

Number of bends in each liquid element. Must be greater than or equal to zero.

1002-1141

G2PRDR (IELL)

Initial orifice coefficient. Must be greater than or equal to zero. G2 pressure-drop coefficient. ΔP=G2PRDR*G*ABS(G)/(2.*RHO).

1142

BNDLOD

Effective L/D per bend.

1143-1282

WALLMC (IELL)

J/m-K

Pipe wall mass * heat capacity /length. Must be greater than zero.

1283-1422

WALLH (IELL)

W/m^2-K

Pipe wall heat-transfer coefficient. Must be greater than zero.

1423-1460

VOLLGC (ICV)

m^3

Total volume of the compressible volume, liquid + gas.

1461-1498

PRESG0 (ICV)

Pa

Initial gas pressure in the compressible volume having gas.

1499-1536

ALPHAP (ICV)

1/Pa

Volume pressure expansion coefficient, (1/V)dV/dP, for the compressible volume.

1537-1574

ALPHAT (ICV)

1/K

Volume thermal expansion coefficient, (1/V)dV/dT, for the compressible volume.

1575-1612

ZCVL (ICV)

m

Reference height for liquid pressure in the compressible volume.

1613-1650

AREAIN (ICV)

m^2

Area of liquid-gas interface in the compressible volume. Input 1.0 if there is no interface.

1651-1688

TREFCV (ICV)

K

Initial steady-state gas temperature if gas is present. Steady-state gas temperature = liquid temperature if input as 0. Not used for a liquid-only compressible volume.

1689

GAMGSC

Cp/Cv for cover gas (P*V)GAMGSC = constant. Used for all compressible volumes containing cover gas.

1690

RGASC

Pa-m^3/kg-K

Gas constant for cover gas, P * V = M * RGASC * T. Used for all compressible volumes containing cover gas.

R = 8314/molecular weight.

R = 2078. for He.

R = 208.1 for Argon.

1691

U0CVGS

Pa-s

Viscosity of cover gas at reference temperature TRFU.

Suggested value:

1.94⨉10-5 at 293 K for He

2.22⨉10-5 at 293 K for Argon

1692

TRFU

K

Reference temperature for gas viscosity.

1693-1720

XLENGG (ISGG)

m

Length of gas segment.

1721-1748

AREASG (ISGG)

m^2

Area.

1749-1804

CVGMLT (M,ISGG)

Multiplicity factors at gas segment ends. M=1 at inlet, 2 at outlet. Inlet and outlet the same as for JCVG(M,ISGG).

1805-1832

DHSEGG (ISGG)

m

Hydraulic diameter.

1833-1860

ROUGHG (ISGG)

m

Surface roughness.

1861-1898

TAUGAS (ICV)

s

Cover-gas temperature time constant.

PUMP OPTIONS

IEMPMP

ILRPMP

Pump Option

Any

-2

User-specified normalized pump head vs. normalized flow.

-3

Any > 0

Equivalent Circuit EM pump.

-2

≥ 0

ALMR EM Pump.

-1

Any ≠ -2

Electromagnetic (EM) pump.

0

Any ≠ -2

Table look-up, user specified normalized pump head vs. time.

1

-1

Centrifugal pump option 1, user-specified normalized pump speed vs. time.

1

0

Centrifugal pump option 1, user-specified normalized motor torque vs. time.

1

1

Centrifugal pump option 1, locked rotor (pump speed = 0).

2

-1

Centrifugal pump option 2, ANL pump model, user-specified normalized pump speed vs. time.

2

0

Centrifugal pump option 2, ANL pump model, user-specified normalized motor torque vs. time.

2

1

Centrifugal pump option 2, ANL pump model, locked rotor (pump speed = 0).

3

Any ≠ -2

EBR-II pump model.

Note: See IEMPMP and ILRPMP.

USER-SPECIFIED PUMP HEAD VS TIME

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = 0 \right)\]

1899-1910

NONE

Not used.

1911-1922

HEADR (IPMP)

Pa

Pump head at t = 0, computed by the code unless steady-state flow = 0.

1923-1982

NONE

Not used.

1983-2222

APMPHD (J,IPMP)

Table of relative pump head. Dimension (20, 12).

2223-2462

AMOTTK (J,IPMP)

s

Times for pump head table. Dimension (20, 12).

CENTRIFUGAL PUMP

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = 1 \right)\]

1899-1910

PMPINR (IPMP)

kg-m^2

Moment of inertia, pump and motor.

1911-1922

HEADR (IPMP)

Pa

Rated pump head.

1923-1934

PMPSPR (IPMP)

Rad/s

Rated pump speed.

1935-1946

PMPFLR (IPMP)

kg/s

Rated pump flow.

1947-1958

PMPEFR (IPMP)

Rated pump efficiency.

1959-1970

TRKLSC (IPMP)

Torque coefficient for shaft friction, windage.

1971-1982

EPSCAV (IPMP)

Cavitation coefficient = ANPSH/HEAD for cavitation, rated value.

1983-2222

APMPHD (IPMP)

Pump head coefficients, J = 1 to 10, and pump torque coefficients, J = 11 to 20.

2223-2462

AMOTTK (IPMP)

s

Motor torque table, J = 1 to 10, and times for motor torque table, J = 11 to 20.

HOMOLOGOUS PUMP MODEL

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = 2 \right)\]

1899-1910

PMPINR (IPMP)

kg-m^2

Moment of inertia, pump and motor.

1911-1922

HEADR (IPMP)

Pa

Rated pump head.

1923-1934

PMPSPR (IPMP)

Rad/s

Rated pump speed.

1935-1946

PMPFLR (IPMP)

kg/s

Rated pump flow.

1947-1958

PMPEFR (IPMP)

Rated pump efficiency.

1959-1970

TRKLSC (IPMP)

Torque coefficient for shaft friction, windage.

1971-1982

EPSCAV (IPMP)

Cavitation coefficient = ANPSH/HEAD for cavitation, rated value.

1983-2222

APMPHD (K, IPMP)

K

Comments

1-3

Torque loss coefficients A(K), low range for

APMPHD(10,IPMP) ≥ SB

Friction torque = A(1)+A(2)*SB+A(3)*SB2

SB = normalized pump speed.

4-6

Torque loss coefficients, middle range for

APMPHD(11,IPMP) ≥ SB > APMPHD(10,IPMP)

7-9

Torque loss coefficients, high range for

SB > APMPHD(11,IPMP)

10-11

Limits of torque loss ranges.

12

Locked rotor loss coefficient.

13

Transition WB, normalized flow for transition from turbulent to laminar pump head.

14

Locked rotor loss coefficient for reverse flow.

15-17

Not used.

18

Pump curve number (1-3).

19

WB for locked rotor.

20

SB for locked rotor.

ILRPMP(IPMP) is set to 1 if WB < APMPHD(19,IPMP) and SB < APMPHD(20,IPMP).

2223-2462

AMOTTK (K,IPMP)

Normalized motor torque table, K = 1 to 10, and times for motor torque table, K = 11 to 20. Note: See also IEMPMP, ILRPMP, PMPHD, and PMPTQ.

EBR-II PUMP MODEL

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = 3 \right)\]

1983-2222

APMPHD (J,IPMP)

Pump head coefficients. Same input format as for the homologous pump model.

2223-2462

AMOTTK

Table of normalized pump speed, j = 1 to 10, and times for pump speed, j = 11 to 20.

Note: For an initial steady-state run, the normalization of the speeds in the AMOTTK table does not matter; the code renormalizes the table so that the speeds are relative to the rated speed (PMPSPR). If AMOTTK is input for a restart, then it must be normalized to the rated speed.

ELECTROMAGNETIC PUMP

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = - 1 \right)\]
\[\mathrm{\text{Pump Head}} = \mathrm{\text{Stall Head}}\left( t \right) \times \left\lbrack 1 - \left( \frac{\mathrm{\text{Flow}}}{\mathrm{\text{Synchronous Flow}}} \right)^{B} \right\rbrack\]

1899-1910

NONE

Not used.

1911-1922

HEADR (IPMP)

Pa

Stall head at \(t = 0\), computed by the code if steady-state flow is not zero.

1923-1934

NONE

Not used.

1935-1946

PMPFLR (IPMP)

s/m

1/Synchronous velocity.

1947-1958

PMPEFR (IPMP)

Coefficient \(B\). Suggested value: 1.30.

1959-1982

NONE

Not used.

1983-2222

APMPHD (J,IPMP)

Table of normalized stall head.

2223-2462

AMOTTK (J,IPMP)

s

Times for APMPHD table.

ALMR EM PUMP

\[\left( \mathrm{\text{IEMPMP}}\left( \mathrm{\text{IPMP}} \right) = -2 \right)\]

EM Pump with motor-generator to extend the coastdown time, see formulation in Section 5.3.4.3.2.

1899-1910

PMPINR (IPMP)

kg-m^2

Moment of inertia, \(I\), in Eq. (5.3-161).

1911-1922

HEADR (IPMP)

Pa

Rated pump head, \(H_{\text{r}}\). See Eq. (5.3-152).

1923-1934

PMPSPR (IPMP)

Rad/s

Rated frequency, or equivalently, pump speed, \(f_{\text{r}}\). See Eq. (5.3-154).

1935-1946

PMPFLR (IPMP)

kg/s

Rated mass flow rate, \(w_{\text{r}}\). See Eq. (5.3-155).

1947-1958

PMPEFR (IPMP)

Rated pump efficiency, \(\varepsilon_{\text{fr}}\). See Eq. (5.3-157).

1959-1982

TRKLSC (IPMP)

Torque friction loss coefficient \(L_{\text{m}}\). See Eq. (5.3-164).

1983-2222

APMPHD (J,IPMP)

ALMR EM Pump model description.

J

Description

Units

1-5

Coefficient \(a_{\text{j}}\) in head curve given by Eq. (5.3-156). See defaults in Table 5.3.5, which are specific to the ALMR design.

Dimensionless

6

Friction loss coefficient \(L_{\text{f}}\) in Eq. (5.3-151).

Dimensionless

7

Time to cut-over to the motor-generator, i.e. trip time. If ILRPMP>0, then the time specified here is ignored and replaced with the value returned by the associated Function Block.

s

8

\(f_{0}\), frequency prior to cutting over to the motor-generator.

rad/s

9

\(V_{\text{r}}\), rated voltage. See Eq. (5.3-153).

V

10-12

Not used

N/A

13

\(V_{\text{fr}}\), cut-over voltage fraction. See Eq. (5.3-160).

Dimensionless

14-20

Not used

N/A

2223-2462

AMOTTK (J,IPMP)

ALMR EM Pump model description, continued.

J

Description

Units

1-7

Coefficient \(b_{\text{j}}\) in Eq. (5.3-158). See defaults in Table 5.3.5, which are specific to the ALMR design.

Dimensionless

8-16

Coefficient \(c_{\text{j-7}}\) in Eq. (5.3-159). See defaults in Table 5.3.5, which are specific to the ALMR design.

Dimensionless

EQUIVALENT CIRCUIT EM PUMP

The PMR4IN block input locations are not used for entering Equivalent Circuit EM Pump descriptions. Instead, see description of EMPUMP blocks.

NORMALIZED PUMP HEAD VS. NORMALIZED FLOW

\[\left( \mathrm{\text{ILRPMP}}\left( \mathrm{\text{IPMP}} \right) = - 2 \right)\]

1899-1982

NONE

Not used.

1983-2222

APMPHD (J,IPMP)

Table of normalized pump head.

2223-2462

AMOTTK (J,IPMP)

Normalized flow for the APMPHD table.

2463

GRAVTY

m/s^2

Acceleration of gravity. Preferred input location is GRAVITY. GRAVTY will be used for the core channels, PRIMAR-4, and BOP if GRAVITY is not defined. If neither GRAVITY or GRAVTY are defined, the default value is 9.81 m/s^2.

2464-2501

BTAPNA (ICV)

1/Pa

Coolant isothermal compressibility, (1/RHO) d RHO/dP, for the compressible volume. Suggested value: 2.13E-10 for sodium at 720 K.

2502-2539

BTATNA (ICV)

1/K

Coolant thermal expansion coefficient, (1/RHO) d RHO/dT, for the compressible volume. Suggested value: -2.8E-4 for sodium at 720 K.

2540-2577

RHONAR (ICV)

kg/m^3

Reference density of Na at TREFCV. Default: 844. Not currently used.

2578-2615

HWALL (ICV)

W/m^2-K

Wall-coolant heat-transfer coefficient for the compressible volume.

2616-2653

AWALL (ICV)

m^2

Wall surface area for the compressible volume.

2654-2691

CMWALL (ICV)

J/K

Mass x specific heat for the wall of the compressible volume.

2692

VOLMIX

Not currently used.

2693

TAUUP

Not currently used.

2694

C1BY

Coefficient in Lyon-Martinelli convective heat-transfer correlation for bypass channel. First coefficient set.

(See C1, C1BY2, C1BY3, C1BY4, IHTBYB, and IHTBYD).

2695

C2BY

See C1BY.

2696

C3BY

See C1BY.

2697-2704

XKALBY (IBYP)

W/m-K

Thermal conductivity of bypass wall A, lower part. 1 ≤ IBYP ≤ NBYP.

2705-2712

XKAUBY (IBYP)

W/m-K

Thermal conductivity of bypass wall A, upper part.

2713-2720

XKBLBY (IBYP)

W/m-K

Thermal conductivity of bypass wall B, lower part.

2721-2728

XKBUBY (IBYP)

W/m-K

Thermal conductivity of bypass wall B, upper part.

2729-2736

XKDBY (IBYP)

W/m-K

Thermal conductivity of bypass wall D.

2737-2744

DABY (IBYP)

m

Thickness of bypass wall A.

2745-2752

DBBY (IBYP)

m

Thickness of bypass wall B.

2753-2760

DDBY (IBYP)

m

Thickness of bypass wall D.

2761-2768

RCALBY (IBYP)

J/m^3-K

Density * specific heat of bypass wall A, lower part.

2769-2776

RCAUBY (IBYP)

J/m^3-K

Density * specific heat of bypass wall A, upper part.

2777-2784

RCBLBY (IBYP)

J/m^3-K

Density * specific heat of bypass wall B, lower part.

2785-2792

RCBUBY (IBYP)

J/m^3-K

Density * specific heat of bypass wall B, upper part.

2793-2800

RCDBY (IBYP)

J/m^3-K

Density * specific heat of bypass wall D.

2801-2856

PSHPBY (J,IBYP)

Power shape by nodes for each bypass channel. Dimension (7,8). Code normalizes distribution. For the number of nodes, see NTNODE.

2857-2880

GAMNBY (IREG,IBYP)

Fraction of total reactor power by region for each bypass channel. If there are no nodes in region 2, then set GAMNBY(2,IBYP) to 0. Dimension (3,8). Note: See FRPR. Sum over all of the three regions of all the NBYP bypass channels of the array elements of GAMNBY = 1 - FRPR.

2881-2904

GAMDBY (IREG,IBYP)

Fraction of decay power by region for each bypass channel. Set to 0. The code adds GAMNBY to GAMDBY for the total power fraction. Dimension (3,8).

2905-2912

PRFRA1 (IBYP)

The fraction of the reactor power distributed in reflector A in region 1 of the bypass channel.

2913-2920

PRFRA2 (IBYP)

The fraction of the reactor power distributed in reflector A in region 2 of the bypass channel.

2921-2928

PERABY (IBYP)

m

Perimeter of wall B in bypass channel.

2929-2936

PERDBY (IBYP)

m

Perimeter of wall D in bypass channel.

2937-3104

DTMPTB (K,ITAB)

Table of valve pressure drop coefficient (See ITABVV ).

Table of normalized temperature drop for an IHX (See IHXCLC) or steam generator (See ISGCLC).

Table of primary side outlet temperature for an IHX (See IHXCLC) or steam generator (See ISGCLC). DTMPTB(1,ITAB)>1.0

Table of normalized heat rejection for an IHX (See IHXCLC) or steam generator (See ISGCLC). DTMPTB(1,ITAB)=1.0. VSIHX1, VSIHX2, and DTSIHX must be nonzero.

Dimension(14,12).

3105-3272

ZCENTR (K,ITAB)

m

Height of thermal center for TABLE(ITAB) for an IHX or steam generator.

3273-3440

TMPMTB (K,ITAB)

s

Times for DTMPTB and ZCENTR.

3441-3444

DTEVPF (IIHX)

Fraction of total steam generator Na temperature drop in evaporator for the intermediate loop connected to IHX(IIHX). Will be reset to 0.7 if equal to 0. or 1. Suggested value: 0.9999 for table lookup option.

3445-3448

PRSIHX (IIHX)

Pa

Steady-state intermediate side IHX inlet pressure.

3449-3452

PRSDRC (IDRC)

Pa

Steady-state intermediate side DRACS inlet pressure.

Not implemented. See instead ISGLNK and ICVNAK and use PRSIHX.

3453

PINMIN

Pa

Minimum subassembly inlet pressure. Default: 10000.

3454

DMP4I1

Not currently used.

3455-3515

DZSHPX (IDZIHX)

m

Fractional axial node heights in IHX.

3516-3519

PERSPX (IIHX)

m

Perimeter between shell and shell side coolant in IHX.

3520-3523

PERSPD (IDRX)

m

Perimeter between shell and shell side coolant in DRACS

Not implemented. See instead ISGLNK and ICVNAK and use PERSPX.

3524-3527

PERPTX (IIHX)

m

Perimeter between shell side coolant and tube in IHX.

3528-3531

PERPTD (IDRX)

m

Perimeter between shell side coolant and tube in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use PERPTX.

3532-3535

PERTIX (IIHX)

m

Perimeter between tube and tube side coolant in IHX.

3536-3539

PERTID (IDRX)

m

Perimeter between tube and tube side coolant in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use PERTIX.

3540-3543

DSHIHX (IIHX)

m

Shell thickness in IHX.

3544-3547

DSHDRC (IDRX)

m

Shell thickness in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use DSHIHX.

3548-3551

DTUIHX (IIHX)

m

Tube thickness in IHX.

3552-3555

DTUDRC (IDRX)

m

Tube thickness in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use DTUIHX.

3556-3559

RCSHHX (IIHX)

J/m^3-K

Density * specific heat of shell in IHX.

3560-3563

RCSHDR (IDRX)

J/m^3-K

Density * specific heat of shell in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use RCSHHX.

3564-3567

RCTUHX (IIHX)

J/m^3-K

Density * specific heat of tube in IHX.

3568-3571

RCTUDR (IDRX)

J/m^3-K

Density * specific heat of tube in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use RCTUHX.

3572-3575

XKSHHX (IIHX)

W/m-K

Thermal conductance of shell in IHX.

3576-3579

XKSHDR (IDRX)

W/m-K

Thermal conductance of shell in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use XKSHHX.

3580-3583

XKTUHX (IIHX)

W/m-K

Thermal conductance of tube in IHX.

3584-3587

XKTUDR (IDRX)

W/m-K

Thermal conductance of tube in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use XKTUHX.

3588-3591

HFPIHX (IIHX)

W/m^2-K

Fouling heat-transfer coefficient for shell side flow in IHX.

If HFPIHX \(< 1 \times 10^{-10}\) a default value of \(1 \times 10^{10}\) is applied.

3592-3595

HFPDRC (IDRX)

W/m^2-K

Fouling heat-transfer coefficient for shell side flow in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use HFPIHX.

3596-3599

HFIIHX (IIHX)

W/m^2-K

Fouling heat-transfer coefficient for tube side flow in IHX.

If HFIIHX \(< 1 \times 10^{-10}\) a default value of \(1 \times 10^{10}\) is applied.

3600-3603

HFIDRC (IDRX)

W/m^2-K

Fouling heat-transfer coefficient for tube side flow in DRACS.

Not implemented. See instead ISGLNK and ICVNAK and use HFIIHX.

3604-3607

SLANTX (IIHX)

Slant-height factor for IHX, tubeside.

3608-3611

SLANTD (IDRX)

Slant-height factor for DRACS, tubeside.

Not implemented. See instead ISGLNK and ICVNAK and use SLANTX.

3612-3649

VOLGS0 (ICV)

m^3

Initial gas volume. Used only for ITYPCV(ICV) = 6,7,8,9,10.

3650

C1PIPE

Conductance coefficient for pipe.

Recommended value: 0.025.

3651

C2PIPE

Conductance coefficient for pipe.

Recommended value: 0.8.

3652

C3PIPE

Conductance coefficient for pipe.

Recommended value: 4.8.

3653

C1IHX

Conductance coefficient for HX, shell side. Also for tube side if both are same; if tube side different, enter tube side value in C1IHXT (heat exchanger).

Recommended value: 0.025.

3654

C2IHX

Conductance coefficient for HX, shell side. Also for tube side if both are same; if tube side different, enter tube side value in C2IHXT (heat exchanger).

Recommended value: 0.8.

3655

C3IHX

Conductance coefficient for HX, shell side. Also for tube side if both are same; if tube side different, enter tube side value in C3IHXT (heat exchanger).

Recommended value: 4.8.

3656

C4IHX

Conductance coefficient for HX, shell side. Also for tube side if both are same; if tube side different, enter tube side value in C4IHXT (heat exchanger).

Recommended value: 0.0.

3657-3719

PMPHD (I,J,K)

Homologous pump head coefficients for range J for pump type (specific speed) K. Used only if IPMDFT>0 and IEMPMP=2.

See Homologous Pumps.

Dimensions (7,3,3).

3720-3800

PMPTQ (I,J,K)

Homologous pump torque coefficients for range J for pump type K. Used only if IPMDFT>0 and IEMPMP=2.

See Homologous Pumps.

Dimensions (9,3,3).

AIR DUMP HEAT EXCHANGER

3801-3804

RITB (IDHX)

m

Heat exchanger tube inner radius.

3805-3808

ROTB (IDHX)

m

Tube outer radius.

3809-3812

XKTB (IDHX)

W/m-K

Tube thermal conductivity.

3813-3816

HOTB (IDHX)

W/m^2-K

Tube-to-air heat transfer coefficient.

3817-3820

HITB (IDHX)

W/m^2-K

Tube-to-NaK or tube-to-Na heat transfer coefficient.

3821-3824

AHT (IDHX)

m^2

Air side heat transfer area.

3825-3828

SRLEN (IDHX)

m

Stack riser length.

3829-3832

XKHXLS (IDHX)

Loss coefficient, air side of heat exchanger.

3833-3836

XKRLS (IDHX)

Riser loss coefficient.

3837-3840

XKSOLS (IDHX)

Stack outlet loss coefficient.

3841-3844

AHX (IDHX)

m^2

Air flow area at heat exchanger.

3845-3848

AR (IDHX)

m^2

Riser cross sectional area.

3849-3852

ASI (IDHX)

m^2

Stack inlet cross sectional area.

3853-3892

XKSILS (K,IDHX)

Table of stack inlet loss coefficient (IFCDHX=0) or air flow rate (IFCDHX=1) vs time.

3893-3932

XKSITM (K,IDHX)

s

Times for XKSILS table.

3933

AIRTMP

K

Air temperature.

FIRST STEAM GENERATOR

3934

HFW

J/kg

Inlet feedwater enthalpy.

3935

WEVI

kg/s

Inlet evaporator mass flow rate estimate (readjusted during steady-state calculations to yield correct sodium-side temperature drop).

3936

PW

Pa

Evaporator waterside average pressure.

3937

TNAX

Not currently used.

3938

XEVO

Exit steam quality from the evaporator. Should be between 0 and 1 for IEVAP = 1 or 3.

GEOMETRIC CONSTANTS

3939

EL

m

Evaporator active length.

3940

DEW

m

Water hydraulic diameter per tube.

3941

DNA

m

Tube outer diameter.

3942

DENA

m

Sodium hydraulic diameter per tube.

3943

ANA

m^2

Sodium flow area per tube.

3944

POD

Tube pitch to diameter ratio.

3945

PINSW

Number of tubes per unit.

EVAPORATOR HEAT TRANSFER NORMALIZATION

3946

PWO

Pa

Evaporator average pressure.

3947

TMO

K

Evaporator average metal temperature.

3948

TNAO

K

Evaporator average sodium temperature.

3949

HSCO

J/kg

H2O: Average subcooled region enthalpy (estimated).

3950

HFBO

J/kg

H2O: Average post-DNB region enthalpy (estimated).

3951

HSHO

J/kg

H2O: Average superheat region enthalpy (estimated).

3952-3953

GWO (2)

kg/m^2-s

H2O: Average 2-phase mass velocity in the evaporator and superheater, respectively.

GEOMETRIC CONSTANTS

3954-3955

QFACT (2)

Heat transfer area multiplier for the evaporator and superheater respectively. For IEVAP = 1 or 3, QFACT(1) is internally adjusted such that the evaporator length and output steam quality correspond to their input values.

3956

ELS

m

Superheater length.

INITIAL ENTHALPY

3957

HWSHO

J/kg

Initial estimate of the superheat water exit enthalpy (internally changed during steady-state calculations).

INITIAL PRESSURE

3958

PD

Pa

Initial drum pressure.

3959

PHPTI

Pa

Initial high pressure turbine inlet pressure.

GEOMETRIC CONSTANTS

3960

VOLD

m^3

Drum volume.

3961

ELDRUM

m

Drum midpoint elevation measured from the evaporator inlet.

RECIRCULATION MOMENTUM

3962

DPFCLD

Pa

Rated cold leg (drum to active inlet of evaporator) friction pressure loss.

3963

CUTOFF

Cutoff head fraction for recirculation pump rated head.

3964

SLA

1/m

Recirculation loop characteristic length to flow area ratio.

3965

DPFHOT

Pa

Rated hot leg (evaporator to drum) friction pressure loss.

3966

REDPTO

Rated evaporator water/steam Reynolds number.

3967

FDPTO

Evaporator friction pressure drop multiplier.

3968-3973

FWTIME (6)

s

Array of time values corresponding to feedwater normalized flow rate profile (FWPROF).

3974-3979

FWPROF (6)

Feedwater flow at times given in FWTIME. Normalized to steady-state flow = 1.0. This option selected by IFWC = 2.

3980-3985

PHTIME (6)

s

Array of time values corresponding to feedwater pump head normalized profile (PMPROF).

3986-3991

PHPROF (6)

Pump head profile at times given in PHTIME. Normalized to feedwater pump ΔP at steady-state. This option is turned on by setting PHPROF(1) non-zero.

3992-3993

DUM

Not currently used.

END OF FIRST STEAM GENERATOR INPUT SECOND STEAM GENERATOR

3994

HFW

J/kg

Inlet feedwater enthalpy.

3995

WEVI

kg/s

Inlet evaporator mass flow rate estimate (readjusted during steady-state calculations to yield correct sodium-side temperature drop).

3996

PW

Pa

Evaporator waterside average pressure.

3997

TNAX

Not currently used.

3998

XEVO

Exit steam quality from the evaporator. Should be between 0 and 1 for IEVAP = 1 or 3.

GEOMETRIC CONSTANTS

3999

EL

m

Evaporator active length.

4000

DEW

m

Water hydraulic diameter per tube.

4001

DNA

m

Tube outer diameter.

4002

DENA

m

Sodium hydraulic diameter per tube.

4003

ANA

m^2

Sodium flow area per tube.

4004

POD

Tube pitch to diameter ratio.

4005

PINSW

Number of tubes per unit.

EVAPORATOR HEAT TRANSFER NORMALIZATION

4006

PWO

Pa

Evaporator average pressure.

4007

TMO

K

Evaporator average metal temperature.

4008

TNAO

K

Evaporator average sodium temperature.

4009

HSCO

J/kg

H2O: Average subcooled region enthalpy (estimated).

4010

HFBO

J/kg

H2O: Average post-DNB region enthalpy (estimated).

4011

HSHO

J/kg

H2O: Average superheat region enthalpy (estimated).

4012-4013

GWO (2)

kg/m^2-s

H2O: Average 2-phase mass velocity in the evaporator and superheater, respectively.

GEOMETRIC CONSTANTS

4014-4015

QFACT (2)

Heat transfer area multiplier for the evaporator and superheater respectively. For IEVAP = 1 or 3, QFACT(1) is internally adjusted such that the evaporator length and output steam quality correspond to their input values.

4016

ELS

m

Superheater length.

INITIAL ENTHALPY

4017

HWSHO

J/kg

Initial estimate of the superheat water exit enthalpy (internally changed during steady-state calculations).

INITIAL PRESSURE

4018

PD

Pa

Initial drum pressure.

4019

PHPTI

Pa

Initial high pressure turbine inlet pressure.

GEOMETRIC CONSTANTS

4020

VOLD

m^3

Drum volume.

4021

ELDRUM

m

Drum midpoint elevation measured from the evaporator inlet.

RECIRCULATION MOMENTUM

4022

DPFCLD

Pa

Rated cold leg (drum to active inlet of evaporator) friction pressure loss.

4023

CUTOFF

Cutoff head fraction for recirculation pump rated head.

4024

SLA

1/m

Recirculation loop characteristic length to flow area ratio.

4025

DPFHOT

Pa

Rated hot leg (evaporator to drum) friction pressure loss.

4026

REDPTO

Rated evaporator water/steam Reynolds number.

4027

FDPTO

Evaporator friction pressure drop multiplier.

4028-4033

FWTIME (6)

s

Array of time values corresponding to feedwater normalized flow rate profile (FWPROF).

4034-4039

FWPROF (6)

Feedwater flow at times given in FWTIME. Normalized to steady-state flow = 1.0. This option selected by IFWC = 2.

4040-4045

PHTIME (6)

s

Array of time values corresponding to feedwater pump head normalized profile (PMPROF).

4046-4051

PHPROF (6)

Pump head profile at times given in PHTIME. Normalized to feedwater pump ΔP at steady-state. This option is turned on by setting PHPROF(1) non-zero.

4052-4053

DUM

Not currently used.

END OF SECOND STEAM GENERATOR INPUT THIRD STEAM GENERATOR

4054

HFW

J/kg

Inlet feedwater enthalpy.

4055

WEVI

kg/s

Inlet evaporator mass flow rate estimate (readjusted during steady-state calculations to yield correct sodium-side temperature drop).

4056

PW

Pa

Evaporator waterside average pressure.

4057

TNAX

Not currently used.

4058

XEVO

Exit steam quality from the evaporator. Should be between 0 and 1 for IEVAP = 1 or 3.

GEOMETRIC CONSTANTS

4059

EL

m

Evaporator active length.

4060

DEW

m

Water hydraulic diameter per tube.

4061

DNA

m

Tube outer diameter.

4062

DENA

m

Sodium hydraulic diameter per tube.

4063

ANA

m^2

Sodium flow area per tube.

4064

POD

Tube pitch to diameter ratio.

4065

PINSW

Number of tubes per unit.

EVAPORATOR HEAT TRANSFER NORMALIZATION

4066

PWO

Pa

Evaporator average pressure.

4067

TMO

K

Evaporator average metal temperature.

4068

TNAO

K

Evaporator average sodium temperature.

4069

HSCO

J/kg

H2O: Average subcooled region enthalpy (estimated).

4070

HFBO

J/kg

H2O: Average post-DNB region enthalpy (estimated).

4071

HSHO

J/kg

H2O: Average superheat region enthalpy (estimated).

4072-4073

GWO (2)

kg/m^2-s

H2O: Average 2-phase mass velocity in the evaporator and superheater, respectively.

GEOMETRIC CONSTANTS

4074-4075

QFACT (2)

Heat transfer area multiplier for the evaporator and superheater respectively. For IEVAP = 1 or 3, QFACT(1) is internally adjusted such that the evaporator length and output steam quality correspond to their input values.

4076

ELS

m

Superheater length.

INITIAL ENTHALPY

4077

HWSHO

J/kg

Initial estimate of the superheat water exit enthalpy (internally changed during steady-state calculations).

INITIAL PRESSURE

4078

PD

Pa

Initial drum pressure.

4079

PHPTI

Pa

Initial high pressure turbine inlet pressure.

GEOMETRIC CONSTANTS

4080

VOLD

m^3

Drum volume.

4081

ELDRUM

m

Drum midpoint elevation measured from the evaporator inlet.

RECIRCULATION MOMENTUM

4082

DPFCLD

Pa

Rated cold leg (drum to active inlet of evaporator) friction pressure loss.

4083

CUTOFF

Cutoff head fraction for recirculation pump rated head.

4084

SLA

1/m

Recirculation loop characteristic length to flow area ratio.

4085

DPFHOT

Pa

Rated hot leg (evaporator to drum) friction pressure loss.

4086

REDPTO

Rated evaporator water/steam Reynolds number.

4087

FDPTO

Evaporator friction pressure drop multiplier.

4088-4093

FWTIME (6)

s

Array of time values corresponding to feedwater normalized flow rate profile (FWPROF).

4094-4099

FWPROF (6)

Feedwater flow at times given in FWTIME. Normalized to steady-state flow = 1.0. This option selected by IFWC = 2.

4100-4105

PHTIME (6)

s

Array of time values corresponding to feedwater pump head normalized profile (PMPROF).

4106-4111

PHPROF (6)

Pump head profile at times given in PHTIME. Normalized to feedwater pump ΔP at steady-state. This option is turned on by setting PHPROF(1) non-zero.

4112-4113

DUM

Not currently used.

END OF THIRD STEAM GENERATOR INPUT FOURTH STEAM GENERATOR

4114

HFW

J/kg

Inlet feedwater enthalpy.

4115

WEVI

kg/s

Inlet evaporator mass flow rate estimate (readjusted during steady-state calculations to yield correct sodium-side temperature drop).

4116

PW

Pa

Evaporator waterside average pressure.

4117

TNAX

Not currently used.

4118

XEVO

Exit steam quality from the evaporator. Should be between 0 and 1 for IEVAP = 1 or 3.

GEOMETRIC CONSTANTS

4119

EL

m

Evaporator active length.

4120

DEW

m

Water hydraulic diameter per tube.

4121

DNA

m

Tube outer diameter.

4122

DENA

m

Sodium hydraulic diameter per tube.

4123

ANA

m^2

Sodium flow area per tube.

4124

POD

Tube pitch to diameter ratio.

4125

PINSW

Number of tubes per unit.

EVAPORATOR HEAT TRANSFER NORMALIZATION

4126

PWO

Pa

Evaporator average pressure.

4127

TMO

K

Evaporator average metal temperature.

4128

TNAO

K

Evaporator average sodium temperature.

4129

HSCO

J/kg

H2O: Average subcooled region enthalpy (estimated).

4130

HFBO

J/kg

H2O: Average post-DNB region enthalpy (estimated).

4131

HSHO

J/kg

H2O: Average superheat region enthalpy (estimated).

4132-4133

GWO (2)

kg/m^2-s

H2O: Average 2-phase mass velocity in the evaporator and superheater, respectively.

GEOMETRIC CONSTANTS

4134-4135

QFACT (2)

Heat transfer area multiplier for the evaporator and superheater respectively. For IEVAP = 1 or 3, QFACT(1) is internally adjusted such that the evaporator length and output steam quality correspond to their input values.

4136

ELS

m

Superheater length.

INITIAL ENTHALPY

4137

HWSHO

J/kg

Initial estimate of the superheat water exit enthalpy (internally changed during steady-state calculations).

INITIAL PRESSURE

4138

PD

Pa

Initial drum pressure.

4139

PHPTI

Pa

Initial high pressure turbine inlet pressure.

GEOMETRIC CONSTANTS

4140

VOLD

m^3

Drum volume.

4141

ELDRUM

m

Drum midpoint elevation measured from the evaporator inlet.

RECIRCULATION MOMENTUM

4142

DPFCLD

Pa

Rated cold leg (drum to active inlet of evaporator) friction pressure loss.

4143

CUTOFF

Cutoff head fraction for recirculation pump rated head.

4144

SLA

1/m

Recirculation loop characteristic length to flow area ratio.

4145

DPFHOT

Pa

Rated hot leg (evaporator to drum) friction pressure loss.

4146

REDPTO

Rated evaporator water/steam Reynolds number.

4147

FDPTO

Evaporator friction pressure drop multiplier.

4148-4153

FWTIME (6)

s

Array of time values corresponding to feedwater normalized flow rate profile (FWPROF).

4154-4159

FWPROF (6)

Feedwater flow at times given in FWTIME. Normalized to steady-state flow = 1.0. This option selected by IFWC = 2.

4160-4165

PHTIME (6)

s

Array of time values corresponding to feedwater pump head normalized profile (PMPROF).

4166-4171

PHPROF (6)

Pump head profile at times given in PHTIME. Normalized to feedwater pump ΔP at steady-state. This option is turned on by setting PHPROF(1) non-zero.

4172-4173

DUM

Not currently used.

END OF FOURTH STEAM GENERATOR INPUT

4174-4183

VSLEXP (K)

m/K

Length times thermal expansion coefficient for the K element or compressible volume. Used to represent the vessel wall for the control rod drive thermal expansion feedback calculation.

COMPONENT-TO-COMPONENT HEAT TRANSFER

4184-4215

HABYBY (K,IBYP)

W/m-K

Heat transfer coefficient x area per unit height for bypass channel-bypass channel heat transfer. Dimensions (4,4). See IBYBY.

4216-4245

HAELHT (K)

W/m-K or W/K

Heat transfer coefficient x area per unit length (W/m-K) for heat transfer from wall of liquid element IELHT(K) to liquid in compressible volume IELHT2(K). For heat transfer from compressible volume to compressible volume, HAELHT is h x area (W/K).

RVACS

4246-4251

XLRVC (IRVC)

m

Length of RVACS section. Used only if section K is a compressible volume.

4252-4257

PERVAC (IRVC)

m

RV perimeter.

TABLE RVACS

4258-4269

RVHTAB (K)

Table of h vs T.

4270-4281

RVHTMP (K)

T for RVHTAB table.

DETAILED RVACS

4258-4263

EPSRV (IRVC)

Emissivity of reactor vessel.

4264-4269

EPSGV (IRVC)

Emissivity of guard vessel inner surface.

4270-4275

PERGV (IRVC)

Perimeter, GV-air.

4276-4281

PERFS (IRVC)

Perimeter, finned shell inner surface - air.

TIME STEP CONTROLS

4282

EPSF

Maximum fractional change in a liquid segment flow rate per PRIMAR time step.

4283

EPSFC

Maximum fractional change in core inlet flow rate per PRIMAR time step.

STEADY-STATE INITIALIZATION

4284-4287

DTIHX (IIHX)

Steady state temperature drop across IHX (primary side). Used only if ISSIHX > 0.

4288-4299

DHPMP (IPMP)

Steady state pump head. Used only if ISSPMP > 0.

BYPASS CHANNEL HEAT TRANSFER CORRELATIONS

4300

C1BY2

Second coefficient set for bypass channel heat transfer coefficient.

4301

C2BY2

See C1BY2.

4302

C3BY2

See C1BY2.

4303

C1BY3

Third coefficient set for bypass channel heat transfer coefficient.

4304

C2BY3

See C1BY3.

4305

C3BY3

See C1BY3.

4306

C1BY4

Fourth coefficient set for bypass channel heat transfer coefficient. See IHTBYB, IHTBYD, and C1BY.

4307

C2BY4

See C1BY4.

4308

C3BY4

See C1BY4.

IHX HEAT TRANSFER CORRELATIONS

See C1IHX, C2IHX, and C3IHX.

4309

C1IHXT

Heat transfer correlation coefficients for the tube side of an HX.

4310

C2IHXT

Heat transfer correlation coefficients for the tube side of an HX.

4311

C3IHXT

Heat transfer correlation coefficients for the tube side of an HX.

4312

C4IHXT

Heat transfer correlation coefficients for the tube side of an HX.

ANNULAR ELEMENTS

4313-4342

WALMC2 (IAEL)

J/m-K

Second wall mass x heat capacity / length for annular element IAEL.

4343-4372

WALLH2 (IAEL)

W/m^2-K

Second wall heat transfer coefficient.

4373-4402

PERWL2 (IAEL)

m

Second wall perimeter.

RVACS, CONTINUED

4403

TAIRVC

K

Air inlet temperature. When using the detailed RVACS model, the air property correlations are valid between 255.4 K and 1088.7 K.

Ignored if IDRVACSTin > 0.

4404

ZBRVC

m

Z at bottom of RVACS.

THE FOLLOWING RVACS INPUT IS ONLY FOR THE DETAILED MODEL

4405

C1RV

Heat transfer correlation coefficient for air in the RVACS.

4406

C2RV

Heat transfer correlation coefficient for air in the RVACS.

4407

C3RV

Heat transfer correlation coefficient for air in the RVACS. See C1, C2, C3.

4408

XLAIRV

m

Length of air inlet section.

4409

DHAIRV

m

Dh, air inlet section.

4410

AARIRV

m^2

Area, air inlet section.

4411

XLAORV

m

Length of air outlet (stack).

4412

DHAORV

m

Dh, stack.

4413

AARORV

m^2

Area, stack

4414-4419

AIRARV (IRVC)

m^2

Air flow area, GV-FS.

4420-4425

AIRAR2 (IRVC)

m^2

Air flow area, FS - concrete wall.

4426-4431

PERGVO (IRVC)

m

Perimeter for radiation from guard vessel outer surface to outer shell inner surface.

4432-4437

PERFSI (IRVC)

Not currently used.

4438-4443

PERFSO (IRVC)

m

Perimeter for radiation from finned shell outer surface to outer wall, also finned shell outer surface to air.

4444-4449

HGASRV (IRVC)

W/m^2-K

Gas h, RV - GV.

4450-4455

SLRVC (IRVC)

Slope:

= 0, Vertical.
= 1, Horizontal.

4456-4461

HFSRV (IRVC)

W/m^2-K

Heat transfer coefficient across finned shell.

4462-4467

HCONRV (IRVC)

W/m^2-K

Heat transfer coefficient between concrete nodes.

COMPONENT - COMPONENT HEAT TRANSFER

4468-4497

CPCPMP (K)

Multiplicity for component - component heat transfer, default = 1.0.

RVACS

4498-4503

GVMC (IRVC)

J/m-K

Mass x specific heat / length, guard vessel.

4504-4509

FSMCI (IRVC)

J/m-K

MC/L, finned shell inner node.

4510-4515

FSMCO (IRVC)

J/m-K

MC/L, FS outer node.

4516-4521

CRMCI (IRVC)

J/m-K

MC/L, concrete inner node.

4522-4527

CRMCO (IRVC)

J/m-K

MC/L, concrete outer node.

4528-4533

TW6RV (IRVC)

K

Temperature of outer wall node.

4534

EPSFS

Emissivity, finned shell outer surface.

4535

SIGSTB

W/m^2-K

Stefan-Boltzmann constant. Suggested value: 5.672E-8.

4536

RW5RV

m^2-K/W

Thermal resistance between surface of outer wall and inner node (node 5).

4537

REYTRV

Reynolds number for transition from laminar to turbulent in air. Overwritten by the code. See Eq. (5.4-120).

4538

AFRTRV

Turbulent friction factor = AFRTRV*Re**BFRTRV.

4539

AFRLRV

Laminar friction factor = AFRLRV/Re.

4540

ORFIN

Inlet orifice coefficient.

Ignored if IDRVACSKin > 0.

4541

XLUNRV

m

Length of upper node between liquid level and top of vessel.

4542

BFRTRV

Turbulent friction factor parameter, see AFRTRV.

4543

UNGVMC

J/m-K

MC/L for GV in upper node.

4544

UNFSMC

J/m-K

MC/L for FS inner node in upper node.

4545

AIRAUN

m^2

Air flow area, upper node.

4546

EPSOW

Emissivity, outer wall.

4547-4552

EPSGVO (IRVC)

Emissivity, guard vessel outer surface.

4553-4558

EPSFSI (IRVC)

Emissivity, finned shell inner surface.

CHECK VALVE TABLES

4559-4618

CKVORF (K,ICKV)

Check valve coefficient table. Dimensions: 10,6.

4619-4678

CKVFLO (K,ICKV)

Check valve normalized flow. Dimension: 10,6.

DEGREE OF IMPLICITNESS

4679

THT2CV

Minimum degree of implicitness for a compressible volume for liquid flow rate calculations.

Suggested values: 0.5 for rapid transients, 0.75 for slow transients

PUMP CAVITATION

4680

CPC0

Pump cavitation coefficients required net positive suction head =

S*S(CPC0+ CPC1*Z+CPC2*Z2+CPC3*Z3+CPC4*Z4).

Z = W/S

W = normalized flow

S = normalized pump speed

Typical values for FFTF:

CPC0 = 457,488
CPC1 = -2,161,072
CPC2 = 4,266,337
CPC3 = -3,636,676
CPC4 = 1,141,003

4681

CPC1

See CPC0.

4682

CPC2

See CPC0.

4683

CPC3

See CPC0.

4684

CPC4

See CPC0.

MULTIPLE INLET/OUTLET PLENA

4685-4722

TPLCV (ICV)

K

Temperature of volume ICV. Entered only for inlet plena to core or bypass channels. Not required for IFMIOP = 0.

4723-4760

PPLCV (ICV)

Pa

Pressure of volume ICV. Entered only for outlet plena to core or bypass channels. Not required for IFMIOP = 0.

4761-4798

ZPLENC (ICV)

m

Reference elevation for volume ICV. Entered only for inlet and outlet plena for core and bypass channels. (ZPLENL and ZPLENU are set from ZPLENC in the channel subroutines). Not required for IFMIOP = 0.

ELEMENT/WALL THERMAL ADJUSTMENT

4799-4938

WALTHK (IELL)

m

Element wall thickness, used only if ITHPEN > 0.

4939-4976

THKWAL (ICV)

m

Compressible volume wall thickness, used only if ITHPEN > 0.

4977

TAUPEN

s

Time constant for thermal penetration depth adjustments to wall thermal treatments, used only if ITHPEN > 0.

4978-5007

WALTH2 (IAEL)

m

Annular element second wall thickness, used only if ITHPEN > 0.

STRATIFIED COMPRESSIBLE VOLUME

5008

RCORE

m

Core radius for use in the Richardson number.

5009-5017

HCSTWL (IW)

W/m^2-K

Coolant heat transfer coefficient at the inner surface of the wall section.

5018-5026

HCSTW2 (IW)

W/m^2-K

Coolant heat transfer coefficient at the outer surface of the wall section.

5027-5035

ASTWL (IW)

m^2

Area of the wall section.

5036-5107

HINVWL (I,IW)

m^2-K/W

Thickness/thermal conductivity of node I in the wall section. I = 1 - 8.

5108-5179

XMCSTW (I,IW)

J/K

Mass x heat capacity of node I in the wall.

5180-5182

ZINST (ICVST)

m

Z of inlet, used only for a vertical wall. Otherwise ZOUTEL(IELL) is used.

5183-5185

VOLBLI (ICVST)

m^3

Volume below the inlet, not used if there is a cover gas in the CV. In this case, the information is obtained from other input for the CV.

5186-5188

EPSTST (ICVST)

K

Minimum temperature difference for switching stages.

5189-5191

XLENTR (ICVST)

m

Entrainment length. A hot plume with a flow rate WH, rising through a cool layer of thickness DZ, will entrain cool liquid at a rate (DZ/XLENTR) * WH.

PARAMETRIC TWO-REGION IHX MODEL

5192-5195

DTSIHX (IIHX)

K

Initial temperature difference between regions in parametric two-region IHX model for IHXCLC(IIHX) < 0 and DTMPTB(1) = 1.0.

5196-5199

VSIHX1 (IIHX)

m^3

First region volume in parametric two-region IHX model for IHXCLC(IIHX) < 0 and DTMPTB(1) = 1.0.

5200-5203

VSIHX2 (IIHX)

m^3

Second region volume in parametric two-region IHX model for IHXCLC(IIHX) < 0 and DTMPTB(1) = 1.0.

THICK-WALLED PIPES

5204-5243

TPWMC (L,K)

J/m-K

Mass*heat capacity/length for wall node L+1 of thick-walled pipe K. Dimensions (4,10). Note: Use WALLMC(IELL) for node 1.

5244-5283

TPWH (L,K)

W/m^2-K

Thermal conductivity/node thickness for node L+1 of thick walled pipe K. Dimensions (4,10). Note: Use WALLH(IELL) for node 1 for h from the mid-point of the first wall node to the wall surface.

STEADY-STATE INITIALIZATION

5284-5293

TCVSSI (II)

K

Steady-state coolant temperature in compressible volume ICVSSI(II).

5294-5303

PCVSSI (II)

Pa

Steady-state liquid pressure in compressible volume ICVSSI(II).

Detailed Air Dump Heat Exchanger Model

IADHX(IDHX) > 0

Not currently used.

5304-5307

EFFIN (IDHX)

m

Fin height. Not currently used

5308-5311

FINTHK (IDHX)

m

Fin thickness. Not currently used.

5312-5315

SPFIN (IDHX)

m

Center-to-center spacing between fins. Not currently used.

5316-5319

XLTUBE (IDHX)

m

Tube spacing parallel to flow. Not currently used.

5320-5323

XTTUBE (IDHX)

m

Tube spacing perpendicular to the flow. Not currently used.

5324

FINVNT

-

Inverse scaling factor for the detailed RVACS thermal inertia during the null transient simulation. Default: 10.0

5325-5500

DMP4IN

Not currently used.