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transverse leakage, the neutron balance in the system is not satisfied. This correction does not work if DFM1=0.0 is entered. 8 XNF Normalization factor for fission source If XNF=0.0, no normalization is done. (suggested option) If XNF ≠ 0.0 and IEVT>0, the total fission source is normalized to XNF. If XNF ≠ 0.0 and IEVT=0, The total fixed source is normalized to XNF and the fission source, if any, is not normalized. 9 PV Parametric eigenvalue (k 0 or α 0 ) to be converged in the search calculation (effective for IEVT>1) If IPVT=0, PV=0.0, If IPVT=1, PV= k 0 (Usually, k 0 =1.0 for α search) If IPVT=2, PV= α 0 10 RYF Relaxation factor for the convergence criterion of total scattering and up-scattering. The criterion =EPS/RYF (suggested value = 0.5) 11 XLAL Point flux convergence criterion in the inner iterations if XLAL>0.0. (suggested value = 2.0*EPS) 12 XLAH Search control parameter (effective if IEVT>1) Upper limit for 1.0 − λ1 used in the linear search. Normally, XLAH = 0.05. 13 EQL Search control parameter (effective if IEVT>1) When New Old 1 λ 1 λ − 1) New parameter modifier to prevent oscillation in the linear search calculation. Normally, XNPM=0.75. Block-00T Termination of control numbers /A3/ Enter ’00T’. 72
Block-04* Positions of interval boundary /IM+1/ Enter the distances from the origin in cm including the origin (0.0). Block-06* Angular quadrature weights /MM/ MM = ISN + 1 for plane or sphere MM = ISN*(ISN+4)/4 for cylinder For ISN= 2, 4, 6, 8, 12, and 16, built-in constants are prepared, then no entry is required. Block-07* Angular quadrature cosines /MM/ For ISN = 2, 4, 6, 8, 12, and 16, built-in constants are prepared; then no entry required. Block-08& Zone number by mesh interval /IM/ Block-09& Material number by zone /IZM/ Material number is allocated by the position of the material name appearing in the material specifications (Sect.2.9). The function activated by the negative value to suppress the buckling effect is removed in the SRAC. Block-19& Order of scatter (P L ) by zone /IZM/ Block-22& Material numbers for activity calculation, required if ID3>0 in Block-15& /ID3/ Block-23& Cross-section table position for activities, required if ID3>0 /ID3/ Block-25* Albedo by group for right boundary, /IGM/ required if IBR=3 in Block-15& (7) and albedo is used Block-26* Albedo by group for left boundary, /IGM/ required if IBL=3 in Block-15& (6) and albedo is used Block-27& X-Region number /IZM/ X-Region number by zone to indicate the region where the cross-sections are averaged by flux*volume weight Block-34* P L scatter constants by angular point, /JT*MM/ 73
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JAEA-Data/Code 2007-004 SRAC2006 :
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Contents 1. General Descriptions ..
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5.5 BWR Fuel Assembly Calculation (
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目次 1. 概要 ................
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5.4 三次元拡散計算 (CI
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1. General Descriptions 1.1 Functio
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essential programs of the integrate
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Sphere (Pebble, HTGR) 1D-Plate (JRR
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ecause the scattering cross-section
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As shown in Fig.1.4-1, one PDS file
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1.5.1 Fast Fission Energy Range (10
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i n m≠n i n i n i n i 1 i i g( C
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mixture(s) having resonant nuclides
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thermal energy range. In the fixed
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1.10 Calculation Scheme In Fig.1.10
Page 33 and 34: 3 2 1 CALL MICREF [20] CALL REACT C
Page 35 and 36: homogenized P 1 spectrum obtained a
Page 37 and 38: Consequently next step ’CALL MACR
Page 39 and 40: 1.11 Output Information Major calcu
Page 41 and 42: (4) A floating number may be entere
Page 43 and 44: 2.2 General Control and Energy Stru
Page 45 and 46: cell. = 2 The PEACO routine (hyperf
Page 47 and 48: should be avoided for the core wher
Page 49 and 50: Note: Usually IC15=1 is used in FBR
Page 51 and 52: Behrens’ term of the Benoist mode
Page 53 and 54: Only the first character (capital l
Page 55 and 56: NET ∑ i= 1 NEGT( i ) =(Total numb
Page 57 and 58: Block-1 Control integers /18/ 1 IGT
Page 59 and 60: asymmetric cell is surrounded by en
Page 61 and 62: = 0 Isotropic (white) reflection =
Page 63 and 64: degree for the numerical angular in
Page 65 and 66: 3 EPSG Extrapolation criterion 4 R
Page 67 and 68: Block-10’ Required if IGT=11, or
Page 69 and 70: = 2 Neutron from moderator = 3 Neut
Page 71 and 72: Unit Cell Periodic B.C. 4 2 3 1 RX(
Page 73 and 74: NX=4 NTPIN=6 NAPIN=1 NPIN(1)=6 6 ID
Page 75 and 76: RDP(1)=0.0 RDP(2) RDP(3) 14 13 12 R
Page 77 and 78: 2.5 ANISN ; One-dimensional S N Tra
Page 79 and 80: 7 IBR Right boundary condition, sam
Page 81 and 82: 22 IPM Angular dependent incident s
Page 83: EV = best guess for α or 0.0 when
Page 87 and 88: 2.6 TWOTRAN ; Two-dimensional S N T
Page 89 and 90: Note: The original TWOTRAN uses two
Page 91 and 92: = 0 (internally set) 19 IHM Total n
Page 93 and 94: = 3 R-θ 31 IEDOPT Edit options. =
Page 95 and 96: = 1 Yes Block-4 Control floating po
Page 97 and 98: Repeat Block-20 through Block-21, N
Page 99 and 100: 2.7 TUD ; One-dimensional Diffusion
Page 101 and 102: = 1 Monitor print at each inner ite
Page 103 and 104: equation is applied to meshes, the
Page 105 and 106: Pin Plate D2 D2 D1 D1 In cylindrica
Page 107 and 108: XYZ(1,2) Y-abscissa of the top side
Page 109 and 110: READ(9) (WORK(J+I),I=1,NDATA) END D
Page 111 and 112: absorption cross-section, each of w
Page 113 and 114: ITMX19 The upper limit of CPU time
Page 115 and 116: corner and there are the same numbe
Page 117 and 118: NUAC19 Override use of Chebychev po
Page 119 and 120: NUAC17 > 0 The constant for all gro
Page 121 and 122: ottom starting with a new card. For
Page 123 and 124: Card-006-3 Specification of meshes
Page 125 and 126: 4 SIG3 Absorption cross-section (
Page 127 and 128: 2 NFX2 Optional print control = 0 N
Page 129 and 130: Region 1 Region 2 Left Right X/R/R
Page 131 and 132: X T 22*11 Meshes 1 Mesh = 1 Region
Page 133 and 134: 2.9 Material Specification ’Mater
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fuel pin: MU08F0U2 and those in MOX
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hydrogen, add character ‘0’ to
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Usually, enter IRES=2 for the heavy
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2.10 Reaction Rate Calculation The
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Block-1 Control integers for reacti
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3 U238 The position of the second n
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2.11 Cell Burn-up Calculation The i
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= 2 Information for debugging = 3 D
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chains under consideration is enlar
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MACROWRK file. 2 INTSTP Step number
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Block-8-1 Required if IBC6=1 /1/ NM
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e avoided. Because U08W and U080 ar
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2.12 PEACO ; The hyperfine Group Re
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3. I/O FILES We shall describe the
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(E(g),g=1,NGF+1) structure. Boundar
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LTH(1) = (LD(1)+1)*LA(1), ordered a
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Background cross-sections Member Yz
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INT(2) = 0 K-member only without sc
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Member name Contents **************
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(WEIGHT(g),g=1,NGF) Lethargy widths
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3.1.5 Fine Group Macroscopic Cross-
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Member mmmmebfM or caseebxM /10*ng+
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Member caseBNUP Material-wise burn-
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Initial inventory in the restart ca
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(YDIOX(j),j=1,NOWSTP) Fission yield
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(n/cm 2 /sec*cm 3 ), NRR is number
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3.2.1 Common PS Files The following
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3.2.5 PS files for TUD The PS files
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at the first column. Block-1-1 Numb
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= ‘DAYS’ days = ‘YEARS’ yea
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GD156 XGD60001 641560 154.660 0 0 0
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: ZZ050 1.50080E+00 *FP-Yield-Data
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Kr83 Zr95 fission β + decay, EC (n
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Ge73 Ge74 As75 Ge76 fission β + de
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4. Job Control Statements In this c
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~SRAC/tool/lmmake/lmmk/lmmk.sh, whi
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5. Sample Input Several typical exa
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613.0 650.0 760.0 769.0 & cooling 7
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5 5 5 5 5 5 & 5 5 5 5 5 5 & 1 2 3 4
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5.3 S N Transport Calculation (PIJ,
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XFEN0001 2 0 5.78720E-02 XNIN0001 2
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Water reflector Extrapolated B.C. B
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1 1 1 1 1 1 1 2 3 008 -2 1 1 999 /
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Note: This sample is time consuming
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XCRN0008 0 0 1.55546E-02 XNIN0008 0
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****** Input for material specifica
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T-Region R-Region X-Region Reflecti
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6. Utility for PDS File Management
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To read in the microscopic cross-se
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7. Mathematical Formulations 7.1 Fo
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scattering kernel at point r’ fro
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The integration by R between R j- a
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G j Pij ( lattice) = Pij ( isolated
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We, however, should take care of th
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2 = ρ 2 + x r sin β = ρ R = x
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1 i ∑ − 1 k = j+ 1 λ ij = λ k
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where λ λ 1 is 2 is = = N ∑ k k
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2π ri −1 Pij = − Σ ∫ ρdρ
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In Fig.7.1-5, the line PQ’ define
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pin rod are divided into four regio
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the arrays T and II, respectively.
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Note that among four terms appearin
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If a group-dependent form of Fick
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7.3 Optional Processes for Resonanc
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7.3.2 Table-look-up Method of f-tab
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has been introduced for the correct
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ϕ i ( 0 u ) = ∑ Pij ( u) W j ( u
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Geometry b i m f b f −( γ + γ )
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will be seen in the reference 65) .
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The lattice cell under study may co
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(2) Two resonance-absorbing composi
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One of the physical problems associ
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and V = V + V , F f m where Σ m ,
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We shall discuss the following two
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where X = 2R p ( Σ C = 2R πρ R p
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• the reduced collision probabili
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The root mean square (RMS) residual
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group flux and for the fast group f
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Table 7.5-1 (1/2) Nomenclature Symb
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7.5.1 Smearing Smearing or spatial
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7.5.2 Spectrum for Collapsing The f
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Here, an equivalent relation holds
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1 F = K ∑∫ g * χ g ( r) ϕ g (
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M dN i ( t) M = ∑ f j→iλ j N i
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8. Tables on Cross-Section Library
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Table 8.1-2 (2/2) Element index (zz
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JEFF-3.0 are based on other nuclear
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Table 8.2-1 (1/8) List of SRAC publ
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8.3 Energy Group Structure The ener
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(4) Upper Boundary of PEACO Routine
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References 1) K. Tsuchihashi, H. Ta
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Experiment,” J. Nucl. Sci. Techno
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75) K. Tasaka : “DCHAIN: Code for
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