2.8.2.13. Block 62 — POWINC — Channel-Dependent Power and Reactivity Input¶
FPDAYS
1
GAMSS
2
Fraction of total power in direct heating of structure.
DUM002
3
Not currently used.
GAMTNC
4
Fraction of total power in direct heating of coolant.
GAMTNE
5
Fraction of total power in direct heating of cladding.
PSHAPE (J)
6-29
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.
PSHAPR (I)
30-44
Radial power shape within pin by radial node, I, normalized power per unit fuel mass, 1 ≤ I ≤ NT.
PLIN (M)
45-52
TPLIN (M)
53-60
Time (from fresh start-up) at the ends of the M steady-state divisions (seconds). M = 1, MSTEP.
FLTPOW
61
(\#/m^2-s)/(W/m)
Fast flux to linear power ratio.
ADOP
62
∆k/K
Doppler coefficient for this channel when part of the core represented by this channel is not voided.
BDOP
63
∆k/K
Doppler coefficient for this channel when part of the core represented by this channel is fully voided.
WDOPA (J)
64-111
VOIDRA (J)
112-159
∆k/k-kg
CLADRA (J)
160-207
∆k/k-kg
FUELRA (J)
208-255
∆k/k-kg
PRSHAP
256
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.
PSHPTP (J)
257-261
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).
PSHPBT (J)
262-266
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).
FLOWBU
267
Fraction of subassemblies in channel that have low (<2.9 at.%) burnup.
XRFSHP
268
Relative reactivity worth of fuel in the channel. Used in EBR-II feedback model.
XRNSHP
269
Relative reactivity worth of sodium in the channel. Used in EBR-II feedback model.
XRSSHP
270
Relative reactivity worth of stainless steel in the channel. Used in EBR-II feedback model.
PSHAPC (J)
271-318
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.
PSHAPB (J)
319-366
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
FHTCLD
367
Cladding steady-state hot channel factor.
FUNKCL
368
Transient cladding thermal conductivity uncertainty factor.
FUNKFU
369
FUNFLM
370
Transient film heat transfer uncertainty factor.
FHTFUL
371
Fuel steady-state hot channel factor.
FUNCOL
372
Transient coolant flow uncertainty factor.
FPKNG
373
Peaking factor.
FUNPOW
374
Transient power uncertainty factor.
END OF EBR-II MK-V SAFETY CASE INPUT
COILP0
375
See FED.
COILP1
376
See FED.
COILP2
377
See FED.