2.7.13. Block 62 — POWINC — Channel-Dependent Power and Reactivity Input
1
FPDAYS
2
GAMSS
Fraction of total power in direct heating of structure.
3
DUM002
Not currently used.
4
GAMTNC
Fraction of total power in direct heating of coolant.
5
GAMTNE
Fraction of total power in direct heating of cladding.
6-29
PSHAPE (J)
Ratio of pin power at axial segment J to the power POW in the peak axial fuel pin segment, 1 ≤ J ≤ MZ. MZ is the number of axial heat transfer segments in the core plus axial blankets. Enter only for IPOWRZ = 0. The first entered segment value (J=1) is for the lower-most segment in the lower axial blanket. Values are normalized to POW or POWTOT using NPIN, NSUBAS, and PRSHAP at the initial steady-state.
30-44
PSHAPR (I)
Radial power shape within pin by radial node, I, normalized power per unit fuel mass, 1 ≤ I ≤ NT.
45-52
PLIN (M)
When MSTEP≤ 8, relative power level at the end of the M steady-state division. It is required that PLIN is 1.0 at the end of the steady-state. It is assumed that during power change periods, the power varies linearly over the time interval from the previous value to the current PLIN(M) value. (M = 1, MSTEP)
53-60
TPLIN (M)
61
FLTPOW
(\#/m^2-s)/(W/m)
Fast flux to linear power ratio.
62
ADOP
∆k/k
Doppler coefficient for this channel when part of the core represented by this channel is not voided.
63
BDOP
∆k/k
Doppler coefficient for this channel when part of the core represented by this channel is fully voided.
64-111
WDOPA (J)
112-159
VOIDRA (J)
∆k/k-kg
160-207
CLADRA (J)
∆k/k-kg
208-255
FUELRA (J)
∆k/k-kg
256
PRSHAP
Ratio of power per subassembly averaged over this channel to the power per sub- assembly averaged over all channels.
Note: These values are normalized by the code over all assemblies such that the average is 1.0.
257-261
PSHPTP (J)
In PINACLE, PLUTO2, and LEVITATE for IPOWRZ=0, ratio of active fuel power at axial segment KCORE2+J to the power POW in the peak axial fuel segment. 1 ≤ J ≤ 5. KCORE2 is the top active fuel node. This array is used when active fuel relocates above the original active fuel, either in-pin (PINACLE) or ex-pin (PLUTO2, LEVITATE).
262-266
PSHPBT (J)
In PLUTO2 and LEVITATE for IPOWRZ=0, ratio of active fuel power at axial segment KCORE1 - J to the power POW in the peak axial fuel segment. 1 ≤ J ≤ 5. KCORE1 is the bottom active fuel node. This array is used when active fuel relocates below the original active fuel due to ex-pin fuel motion (PLUOT2, LEVITATE).
267
FLOWBU
Fraction of subassemblies in channel that have low (<2.9 at.%) burnup.
268
XRFSHP
Relative reactivity worth of fuel in the channel. Used in EBR-II feedback model.
269
XRNSHP
Relative reactivity worth of sodium in the channel. Used in EBR-II feedback model.
270
XRSSHP
Relative reactivity worth of stainless steel in the channel. Used in EBR-II feedback model.
271-318
PSHAPC (J)
Ratio of core fuel pin power at axial segment J to the power POW in the peak axial fuel pin segment, 1 ≤ J ≤ MZC-1. MZC-1 is the number of axial coolant segments. Enter only for IPOWRZ = 1. The first entered segment value (J=1) is for the lower-most segment in the lower axial reflector. Values are normalized to POW or POWTOT using NPIN, NSUBAS, PRSHAP, PSHAPB, and the core fuel and blanket fuel mass distributions at the initial steady-state.
319-366
PSHAPB (J)
Ratio of blanket fuel pin power at axial segment J to the power POW in the peak axial fuel pin segment, 1 ≤ J ≤ MZC-1. MZC-1 is the number of axial coolant segments. Enter only for IPOWRZ = 1. The first entered segment value (J=1) is for the lower-most segment in the lower axial reflector. Values are normalized to POW or POWTOT using NPIN, NSUBAS, PRSHAP, PSHAPC, and the core fuel and blanket fuel mass distributions at the initial steady-state.
EBR-II MK-V SAFETY CASE INPUT
367
FHTCLD
Cladding steady-state hot channel factor.
368
FUNKCL
Transient cladding thermal conductivity uncertainty factor.
369
FUNKFU
370
FUNFLM
Transient film heat transfer uncertainty factor.
371
FHTFUL
Fuel steady-state hot channel factor.
372
FUNCOL
Transient coolant flow uncertainty factor.
373
FPKNG
Peaking factor.
374
FUNPOW
Transient power uncertainty factor.
END OF EBR-II MK-V SAFETY CASE INPUT
375
COILP0
See FED.
376
COILP1
See FED.
377
COILP2
See FED.