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

1-7

ACCZ (KZ)

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.

8-31

AXHI (J)

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.

32-38

DHZ (KZ)

m

Hydraulic diameter in zone KZ.

39-45

DSTIZ (KZ)

m

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

46-52

DSTOZ (KZ)

m

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

53

PLENL

m

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

54-77

RBR (J)

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.

78-101

RER (J)

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.

102

RBRPL

m

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

103

RERPL

m

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

104-127

RINFP (J)

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.

128-151

ROUTFP (J)

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.

152-158

ZONEL (KZ)

m

Length of zone KZ.

159-165

SRFSTZ (KZ)

m

SFR, structure perimeter in zone KZ per pin.

166

AREAPC

m^2

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

167

CFLAT

m

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

168

FFLAT

m

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

169-175

DRFO (KZ)

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).

176

STCOR

Not currently used.

177

VFPLNT

Not currently used.

178

VFLREF

Not currently used.

179

VFUREF

Not currently used.

180

RBR0

m

Nominal cladding inner radius.

181

RER0

m

Nominal cladding outer radius.

182-188

SER (KZ)

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.

189-195

DRFI (KZ)

m

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

196

VFC

Not currently used.

197-220

RAFUZ

Not currently used.

221

ZCHOBT

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

222

ZCHOTP

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

223

ZOFFST

m

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

224-247

RIZNC (J)

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.

248-271

RIZNM (J)

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

272

TWASTI

m

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

273

TWASTO

m

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

274

XXNPIN

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.

275-284

DZEMFM

See FED.

285-350

DUMGEO

Not currently used.