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Block 64 --- COOLIN --- Channel-Dependent Coolant Input
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.. default-role:: sasinp

.. sasblock:: COOLIN 64

.. sasinp:: AFR
	:location: 1

	| Liquid slug friction factor coefficients.
	| Default values: `AFR` = 0.1875, `BFR` = -0.2.

.. sasinp:: BFR
	:location: 2

	see `AFR`

.. sasinp:: C1
	:location: 3

	| Coefficients in convection heat-transfer coefficient equation:
	| Hc = Kc\*(\ `C1`\ \*(Re\*Pr)\*\*\ `C2` + `C3`\ )/Dh
	| (Lyon-Martinelli correlation).

	| Kc: coolant thermal conductivity
	| Re: Reynolds number
	| Pr: Prandtl number
	| Dh: channel hydraulic diameter

.. sasinp:: C2
	:location: 4

	See `C1`

.. sasinp:: C3
	:location: 5

	See `C1`

.. sasinp:: DWMAX
	:location: 6

	| Maximum fractional change per heat-transfer step in coolant flow rate before boiling.
	| Default: = 0.2

.. sasinp:: RELAM
	:location: 7

	Reynolds number for switch between turbulent friction factor and laminar friction factor.

.. sasinp:: AFLAM
	:location: 8

	| Laminar friction factor = `AFLAM`\ /Re, where Re is the Reynolds number.
	| Suggested value: 64.

.. sasinp:: DUM000
	:location: 9-46

	Not currently used.

.. sasinp:: W0
	:location: 47
	:units: kg/s

	W, steady-state coolant flow rate per fuel-pin.

.. sasinp:: XKORI (K,M)
	:location: 48-63

	| Orifice coefficients K < 8:

	| K = 1,2, ..., `NREFB`\ +\ `NREFT`\ +1:
	| `XKORI`\(K,M) is the coefficient at the bottom of zone K.

	| K = `NREFB`\ +\ `NREFT`\ +2:
	| `XKORI`\(K,M) is the coefficient at the top of the subassembly.

	| M = 1, for upward flow.
	| M = 2, for downward flow.

	| Example: ((K=1,2,…),M=1,2)

.. sasinp:: XKORGD
	:location: 64

	Orifice coefficient for spacer grids in pin. See `NGRDSP`\ .

.. sasinp:: DZIAB
	:location: 65
	:units: 1/m

	| Effective coolant inertial term below the subassembly inlet.
	| Suggested value: D/(2\*ACC), where D is the subassembly inlet hydraulic diameter and ACC is the inlet cross-sectional flow area per pin.

.. sasinp:: DZIAT
	:location: 66
	:units: 1/m

	| Effective coolant inertial term above the subassembly outlet.
	| Suggested value: D/(2\*ACC), where D is the subassembly outlet hydraulic diameter and ACC is the outlet cross-sectional flow area per pin.


.. sasinp:: THETA1
	:location: 67

	| = 0.5 normally; = 0.0 for implicit calculation.

.. sasinp:: THETA2
	:location: 68

	| = 0.5 normally; = 1.0 for implicit calculation.

.. sasinp:: DTLMAX
	:location: 69
	:units: K

	Maximum temperature change/coolant time step in liquid. Suggested value: 15.

.. sasinp:: DTVMAX
	:location: 70
	:units: K

	Maximum temperature change/coolant time step in vapor. Suggested value: 50.


.. sasinp:: DZIMAX
	:location: 71
	:units: m

	Maximum interface motion/coolant time step. Suggested value: 0.1.


.. sasinp:: HCOND
	:location: 72
	:units: W/m^2-K

	Condensation heat-transfer conductance of coolant.

.. sasinp:: SLMIN
	:location: 73
	:units: m

	Minimum initial liquid slug length. Recalculated as cladding melting is approached. Default: 0.02.

.. sasinp:: TUPL
	:location: 74
	:units: K

	Temperature of liquid coolant re- entering the subassembly from above. Used only with PRIMAR-1.

.. sasinp:: WFMIN
	:location: 75
	:units: m

	Minimum film thickness on cladding. Burnout is assumed for film thickness less than `WFMIN`\ . For static film option `WFMIN` is approximately 0.667\*WF0. Film motion model is not operational. Default: 1.0E-7. (See `WFMIND` and `WFMNSD`).

.. sasinp:: WFMINS
	:location: 76
	:units: m

	Minimum film thickness on structure. Default: `WFMIN`

.. sasinp:: WFS00
	:location: 77
	:units: m

	Initial film thickness on structure. Default: WF0.

.. sasinp:: FRACP
	:location: 78-80

	Fraction of pins in this channel in failure group M. See `IGASRL`\ . (M)

.. sasinp:: FRUPT
	:location: 81-83

	Cladding life fraction for cladding failure in group M. See `IGASRL`\ . (M)

.. sasinp:: WF0
	:location: 84
	:units: m

	Initial thickness of liquid coolant film left on the cladding in a voided region. Suggested value: That thickness corresponding to a total liquid volume fraction of 0.15 (spread between cladding and structure films) in the voided region.

.. sasinp:: TFIS
	:location: 85-104

	Not currently used. (I)

.. sasinp:: PFIS
	:location: 105-124

	Not currently used. (I)

.. sasinp:: ZFISU
	:location: 125-144

	Not currently used. (I)

.. sasinp:: ZFISD
	:location: 145-162

	Not currently used. (I)

.. sasinp:: DTSWCH
	:location: 163
	:units: K

	| Switch from pre-boiling to boiling when coolant temperature is within `DTSWCH` of boiling.
	| Default: 5 K.

.. sasinp:: DTSI
	:location: 164
	:units: K

	Superheat for bubble formation near a liquid-vapor interface.

.. sasinp:: DTS
	:location: 165
	:units: K

	Superheat before any sodium vapor bubble can be formed.

.. sasinp:: RESMLT
	:location: 166

	Not currently used.

.. sasinp:: TEMDLT
	:location: 167

	Not currently used.

.. sasinp:: AFRV
	:location: 168

	| Vapor friction factor = `AFRV`\ \*(Re)\*\* `BFRV`\.
	| Default values: `AFRV` = 0.316, `BFRV` = -0.25.

.. sasinp:: BFRV
	:location: 169

	see `AFRV`

.. sasinp:: XMINL
	:location: 170
	:units: m

	Vapor pressure gradient calculation starts when vapor bubble length is `XMINL`\ . Default: 0.05.

.. sasinp:: DTCMIN
	:location: 171
	:units: s

	| Minimum coolant time step size before boiling.
	| Suggested value: 1.0E-6.

.. sasinp:: WFMIND
	:location: 172
	:units: m

	| Minimum cladding film thickness after `IFILM` film nodes have dried out.
	| Suggested value: 1.0E-7

.. sasinp:: WFMNSD
	:location: 173
	:units: m

	| Minimum structure film thickness after `IFILM` nodes have dried out.
	| Suggested value: 1.0E-7

.. sasinp:: FVAPM
	:location: 174

	Fraction of two-phase friction factor to be used in vapor calculation.

	| =0, For single-phase friction factor.
	| =1, For two-phase friction factor.

.. sasinp:: AFRF
	:location: 175

	Liquid film friction factor coefficient. Friction factor = `AFRF` \* (Re) \*\* `BFRF`. Default: 0.316.

.. sasinp:: BFRF
	:location: 176

	Liquid film friction factor coefficient. Default: -0.25.

.. sasinp:: TPDMIN
	:location: 177
	:units: s

	Minimum coolant time step size during boiling. Suggested value: 1.0E-6.

.. sasinp:: DTACCL
	:location: 178
	:units: s

	Acceleration term is dropped from the momentum equation for Na vapor in a pressure drop bubble if the time step size is less than `DTACCL`\ . Suggested value: 1.0E-5.

.. sasinp:: REFLAM
	:location: 179

	Reynolds number for switch to laminar friction factor for liquid film.

.. sasinp:: AFFLAM
	:location: 180

	Laminar film friction factor = `AFFLAM`\ /Re, where Re is the Reynolds number.

.. sasinp:: AGSRLS
	:location: 181
	:units: m^2

	Flow area between gas plenum and rupture point, used only if `IGASRL` = 1.

.. sasinp:: GASKOR
	:location: 182

	Orifice coefficient between gas plenum and rupture point, used only if `IGASRL` =1.

.. sasinp:: PGRMIN
	:location: 183
	:units: Pa

	Shut off gas release when plenum pressure falls below `PGRMIN`\ , used only if `IGASRL` = 1.

.. sasinp:: GASMW
	:location: 184

	Molecular weight of plenum gas. Suggested value: 100-130.

.. sasinp:: HEBOIL
	:location: 185

	Boiling heat transfer enhancement factor. Suggested value: 1.0 for Na, 50-100 for D2O.

.. sasinp:: TMFAIL
	:location: 186-188
	:units: s

	Pin failure time for pin group M for the gas release model. Used only if `IGASRL`\ =2. (M)

.. sasinp:: UACH1
	:location: 189

	Channel-to-channel heat flow per pin per unit height at axial node J from coolant in channel I to coolant in channel I+1 is calculated as:

.. sasinp:: UACH2
	:location: 190

	Q(J)=(\ `UACH1`\ (I)\*K(J)+\ `UACH2`\ (I)\*C(J)\*(W(I)+W(I+1)))\*(T(I,J)-T(I+1,J))

	| Where
	| T(I,J) = Coolant temperature
	| K(J) = Coolant thermal conductivity
	| C(J) = Coolant specific heat
	| W(I) = Coolant flow rate

	| Note: `UACH1` and `UACH2` are used only if `JJMLTP` is not equal to 0.

.. sasinp:: REORFT
	:location: 191

	Transition Reynolds number for the inlet orifice. The inlet orifice goes laminar for smaller Reynolds numbers. Used only if `JJMLTP` > 0.

.. sasinp:: FLSWCH
	:location: 192

	Switch to lumped node coolant temperature treatment when \|W/W0\| < `FLSWCH`\ . Only in reflector zones. Only in the pre-boiling calculation.

.. sasinp:: RELAMV
	:location: 193

	Vapor Reynolds number for switch from laminar to turbulent.

.. sasinp:: AFLAMV
	:location: 194

	Vapor laminar friction factor = `AFLAMV`\ /Re.                                                                                                                                                   |                   |               |

.. sasinp:: FLODTM
	:location: 195
	:units: s

	Film flooding time. Only used if `IFLOOD` = 1.

.. sasinp:: QEMAX
	:location: 196
	:units: W/m^2

	Maximum heat flux from clad to vapor in a voided region. Default: no limit.

**DETAILED COOLANT SUB-CHANNEL MODEL**

.. sasinp:: UACHM1 (K)
	:location: 197-200

	| Coolant sub-channel to sub-channel heat flow per pin per unit height at axial node J from channel I to channel L is calculated as:
	| Q(J)= (\ `UACHM1`\ \*k(J)+\ `UACHM2`\ \*C(J)\*(W(I)+W(L+1))) \*(T(I,J)-T(L,J))

	| where

	| T(I,J) = coolant temperature
	| k(J) = coolant thermal conductivity
	| C(J) = coolant heat capacity
	| W(I) = coolant flow rate
	| L = the Kth channel that channel I is in contact with

	| Note: UACH1 and UACH2 were used for a previous multiple pin model. `UACHM1`\ (K) and `UACHM2`\ (K) are used for the current detailed coolant sub-channel model.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: UACHM2 (K)
	:location: 201-204

	| See `UACHM1`\ .
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: ALATRL (K)
	:location: 205-208
	:units: m

	| `ALATRL` Coolant lateral flow area per pin per unit height.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: XKLAT (K)
	:location: 209-212

	| Lateral flow orifice coefficient.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: DPLTLM
	:location: 213
	:units: Pa

	| Lateral flow goes laminar if pressure difference between adjacent sub-channels is less than `DPLTLM`\ .
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: XKSWRL
	:location: 214
	:units: 1/m

	| Swirl flow between sub-channels = `XKSWRL`\ \*DZ\*WAV

		| DZ = axial node height
		| WAV = average of sub-channel axial coolant flow rates
		| See also `KSWIRL`\ .
		| Reserved for the detailed coolant sub-channel model.

.. sasinp:: DTNUL1
	:location: 215
	:units: s

	| Time step for the single sub-assembly null transient.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: EPSFLW
	:location: 216
	:units: kg/s

	| Iteration convergence criterion, flow rates
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: EPSTMP
	:location: 217
	:units: K

	| Iteration convergence criterion, coolant temperatures.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: EPSPRS
	:location: 218
	:units: Pa

	| Iteration convergence criterion, coolant pressures.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: XCMPRS
	:location: 219

	| Compressibility multiplier for the mass conservation equation. Default = 1.0
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: XLINRT
	:location: 220
	:units: m

	| Inertial length for sub-channel to sub-channel flow.
	| Reserved for the detailed coolant sub-channel model.

.. sasinp:: DUMCOO
	:location: 221-300

	Not currently used.