2.8.2.12. Block 61 — GEOMIN — Channel-Dependent Geometry Data

ACCZ (KZ)

1-7

m^2

Coolant flow area per fuel-pin in zone KZ. For example, core plus axial blankets plus fission-gas plenum, i.e., the whole fuel-pin length, is one zone. Each axial reflector is a separate zone.

AXHI (J)

8-31

m

Length of axial segment J, 1 ≤ J ≤ MZ. MZ is the number of axial segments in core plus blankets. Note: All should be as equal in size as possible. MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

DHZ (KZ)

32-38

m

Hydraulic diameter in zone KZ.

DSTIZ (KZ)

39-45

m

DSTI (thickness of inner structure node) in zone KZ. (See FNSROS for consistent input).

DSTOZ (KZ)

46-52

m

DSTO (thickness of outer structure node) in zone KZ. (See FNSROS for consistent input)

PLENL

53

m

Length of fission-gas plenum. Note: MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

RBR (J)

54-77

m

Cladding inner radius for axial segment J, 1 ≤ J ≤ MZ.

Note: If all values are the same, only the first must be input. MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

RER (J)

78-101

m

Cladding outer radius for axial segment J, 1 ≤ J ≤ MZ.

Note: If all values are the same, only the first must be input. MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

RBRPL

102

m

Cladding inner radius in gas plenum. Note: MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

RERPL

103

m

Cladding outer radius in gas plenum. Note: MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

RINFP (J)

104-127

m

Fuel inner radius for axial segment J, 1 ≤ J ≤ MZ. (Minimum of 1.0E-6 if ISSFUE = 1).

Note: If all values are the same, only the first must be input. MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

ROUTFP (J)

128-151

m

Fuel outer radius for axial segment J, 1 ≤ J ≤ MZ. Note: If all values are the same, only the first must be input. MFUEL (IFUELO= 2) requires this dimension to be defined based on as-fabricated dimensions.

ZONEL (KZ)

152-158

m

Length of zone KZ.

SRFSTZ (KZ)

159-165

m

SFR, structure perimeter in zone KZ per pin.

AREAPC

166

m^2

APC, coolant plus pin area per pin, in the pin section.

CFLAT

167

m

Beveled corner dimension on outer cladding surface for MTREAT > 0.

FFLAT

168

m

Beveled cormer dimension on outer fuel surface for MTREAT > 0.

DRFO (KZ)

169-175

m

KZ = 1, NZONE. For KZ not equal to KZPIN , DRFO is the thickness of the outer reflector node in zone KZ. Note that a two-node, slab-geometry treatment is used for heat transfer to the reflector. (See DRFI for the inner node thickness). For KZ = KZPIN, DRFO = cladding thickness in the plenum region (RERPL - RBRPL).

STCOR

176

Not currently used.

VFPLNT

177

Not currently used.

VFLREF

178

Not currently used.

VFUREF

179

Not currently used.

RBR0

180

m

Nominal cladding inner radius.

RER0

181

m

Nominal cladding outer radius.

SER (KZ)

182-188

m

For KZ not equal to KZPIN, SER is the reflector perimeter per pin wetted by coolant in the reflector zone. For KZ = KZPIN, SER is the pin perimeter in the gas plenum region.

DRFI (KZ)

189-195

m

KZ = 1,…,NZONE. DRFI is the thickness of the inner reflector node in zone KZ.

VFC

196

Not currently used.

RAFUZ

197-220

Not currently used.

ZCHOBT

221

Axial coordinates lower end of the hodoscope field of view referenced to the fuel pin bottom. Used only for TREAT experiment analysis.

ZCHOTP

222

Axial coordinates upper end of the hodoscope field of view referenced to the fuel pin bottom. Used only for TREAT experiment analysis.

ZOFFST

223

m

Axial (Z) offset, elevation of the bottom of the lower blanket. Default = 0.

RIZNC (J)

224-247

m

Outer radius of central zone corresponding to IZNC(J). Default value of zero results in central zone outer radius being set by IZNC(J) and the assumption of an equal delta R radial mesh. Used only for IFUELC = 1.

RIZNM (J)

248-271

m

Outer radius of intermediate zone corresponding to IZNM(J). Default value of zero results in intermediate zone outer radius being set by IZNM(J) and the assumption of an equal delta R radial mesh. Used only for IFUELC = 1

TWASTI

272

m

Initial wastage thickness on the cladding inner surface. Used in DEFORM-5 and FPIN2.

TWASTO

273

m

Initial wastage thickness on the cladding outer surface. Used in DEFORM-5 and FPIN2.

XXNPIN

274

Number of pins per subassembly. Used only by the multiple pin model. See also NPIN. If XXNPIN is 0.0, then the code will set XXNPIN = NPIN . If XXNPIN is not 0.0, then NPIN will be set to XXNPIN, rounded (not truncated) to the nearest integer.

DZEMFM

275-284

See FED.

DUMGEO

285-350

Not currently used.