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NEA-0598 RSYST.

RSYST, Modular System for Reactor Core and Shielding Problems

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1. NAME OR DESIGNATION OF PROGRAM:  RSYST.
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2. COMPUTERS
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Program name Package id Status Status date
RSYST NEA-0598/01 Tested 13-SEP-1982

Machines used:

Package ID Orig. computer Test computer
NEA-0598/01 IBM 360 series IBM 360 series
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3. DESCRIPTION OF PROBLEM OR FUNCTION

RSYST is a modular system for reactor and shielding calculations. It consists of a system nucleus, utility modules, general data manipulation modules, reactor statics, burnup and shielding calculation modules, a data base and fast and thermal cross section libraries based on ENDF/B-IV. The computational path is defined in the card input using user control commands. User commands feature logical branches which permit the construction of loops in the module execution. Standard computational paths can be stored away in the data base and can later be activated by standard commands. RSYST stores all information in so-called data blocks of the data base. Each block in addition to the actual data contains data structure information. The system is integrated and data can be transferred between computational modules without need for rearrangement or transformation. The system nucleus takes care of the transfer of data between the data base and the modules, the utility modules can  be used to prepare data for use by subsequent modules (normalizations, interpolations, comparison of data, transformations through general mathematical functions), for editing and plotting data sheets.
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4. METHOD OF SOLUTION

The computational modules are able to solve several reactor physics problems by the following methods:

- Zero-dimensional spectrum calculations in the fast energy range    by the Bn and/or Pl method.
- Zero-dimensional spectrum calculations in the thermal energy    range by the Bn method.
- Calculation of fluxes in the resonance domain by the Nordheim or    NR approximation.
-  Calculation of group constants by the gas model.
-  Homogenization and collapsing of group constants.
-  One-dimensional and two-dimensional neutron diffusion.
-  One-dimensional transport problems by the Sn method.
-  One-dimensional transport by the collision probability method.
-  Burnup equations with given flux conditions.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

No dynamic storage allocation is used. Some modules have fixed dimensions, some a unique data array, whose length is defined at compilation time and depends on the available storage in the computer used.
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6. TYPICAL RUNNING TIME

The 36 sample problems, demonstrating the use of almost all modules take about 400 seconds CPU time on the IBM 360/91.
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7. UNUSUAL FEATURES OF THE PROGRAM

Modular construction, automatic data management, simple to use.
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8. RELATED AND AUXILIARY PROGRAMS

- A GGC-4 library based on ENDF/B-IV, 99 energy groups with 100    nuclides.
- A 126 energy group thermal library for graphite, water, at    different temperatures and other 53 nuclides.
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9. STATUS
Package ID Status date Status
NEA-0598/01 13-SEP-1982 Tested at NEADB
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10. REFERENCES
NEA-0598/01, included references:
- I.A. Bestrich, W.Golden, K.Kubler and R.Ruhle;
"Implementation of the Program System RSYST on the IBM 370/168
of the GFK at Karlsruhe"
ORNL-tr-2970 (IKE R No 4-35) December 1974.
- R.Ruhle;
"RSYST, an Integrated Modular System for Reactor and Shielding
Calculations"
- R.Ruhle;
"RSYST, an Integrated Modular System with Data Basis
for Automated Calculation of Nuclear Reactors"
ORNL-tr-2796 (IKE-BNR-4-12) January 1973
- RSYST Vol.2
"Module Description and Input Parameter Specification"
-Ernest G. Silver;
"RSYST - Short Description of the Modules"
ORNL-tr-4193
- R.Ruhle;
"RSYST-1-11 - Experience and Further Development"
ATKE Bd.26 (1975) Lfg.3
- R.Ruhle;
"Data Structure and Control of the Reactor Program System RSYST
1971 Reactor Conference of the German Atomic Forum/KTG in Bonn.
- R.Ruhle;
"RSYST, an Integrated Modular System for Reactor and Shielding
Calculations"
ANS Meeting, Ann Arbor, April 9-10 (1973)
- Enrico Sartori, NEA DB;
"Note to all RSYST Users"
NDB/3011/smg (29,Aug.1985)
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11. MACHINE REQUIREMENTS

800 K bytes of fast core is the size necessary if the single modules are run without overlay. For small applications this size can be reduced considerably. Disc drives are  necessary for random access files.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0598/01 FORTRAN+ASSEMBLER
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

IBM 360 OS MVT.
Should run without difficulties also on IBM 370 MVS/SE.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Every module is an overlay segment. A unique load module is used for the whole system.
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15. NAME AND ESTABLISHMENT OF AUTHOR

          Roland Ruehle
          Institut fuer Kernenergetik der Universitaet Stuttgart
          7000 Stuttgard-Vaihingen
          Pfaffenwaldring 31, Germany.
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16. MATERIAL AVAILABLE
NEA-0598/01
File name File description Records
NEA0598_01.002 JCL AND SYSTEM IMPLEMENTATION INSTRUCTIONS 572
NEA0598_01.003 SYSTEM SOURCE FOR IEBUPDTE 13532
NEA0598_01.004 PHYSICS SOURCE FOR IEBUPDTE 30331
NEA0598_01.005 INPUT FOR TEST CASE IN IEBUPDTE FORM 8668
NEA0598_01.006 OVERLAY CONTROL CARDS 114
NEA0598_01.007 ABBRAND TEST CASE PRINTED OUTPUT 913
NEA0598_01.008 ABRBIB TEST CASE PRINTED OUTPUT 295
NEA0598_01.009 AKTIV TEST CASE PRINTED OUTPUT 143
NEA0598_01.010 DIFF1D TEST CASE PRINTED OUTPUT 895
NEA0598_01.011 DIFF2D TEST CASE PRINTED OUTPUT 472
NEA0598_01.012 DOQ TEST CASE PRINTED OUTPUT 221
NEA0598_01.013 GAMTHERM TEST CASE PRINTED OUTPUT 156
NEA0598_01.014 GGCMISCH TEST CASE PRINTED OUTPUT 128
NEA0598_01.015 GGCMISC1 TEST CASE PRINTED OUTPUT 322
NEA0598_01.016 GGCMISC2 TEST CASE PRINTED OUTPUT 114
NEA0598_01.017 GRKBAND TEST CASE PRINTED OUTPUT 3421
NEA0598_01.018 GRUGRENZ TEST CASE PRINTED OUTPUT 113
NEA0598_01.019 INTERPOL TEST CASE PRINTED OUTPUT 1182
NEA0598_01.020 ISOSTO TEST CASE PRINTED OUTPUT 810
NEA0598_01.021 KOMBL TEST CASE PRINTED OUTPUT 892
NEA0598_01.022 MATMAN TEST CASE PRINTED OUTPUT 1867
NEA0598_01.023 MITHOM TEST CASE PRINTED OUTPUT 1190
NEA0598_01.024 MITTEL TEST CASE PRINTED OUTPUT 1423
NEA0598_01.025 MIX TEST CASE PRINTED OUTPUT 336
NEA0598_01.026 MIXBI TEST CASE PRINTED OUTPUT 537
NEA0598_01.027 MIXTAB TEST CASE PRINTED OUTPUT 144
NEA0598_01.028 MST TEST CASE PRINTED OUTPUT 159
NEA0598_01.029 NGAMMA TEST CASE PRINTED OUTPUT 760
NEA0598_01.030 NRAPPROX TEST CASE PRINTED OUTPUT 157
NEA0598_01.031 PLOTH TEST CASE PRINTED OUTPUT 1182
NEA0598_01.032 PRINT TEST CASE PRINTED OUTPUT 692
NEA0598_01.033 RESPU TEST CASE PRINTED OUTPUT 748
NEA0598_01.034 RSYBLOC TEST CASE PRINTED OUTPUT 636
NEA0598_01.035 RSYCAL TEST CASE PRINTED OUTPUT 154
NEA0598_01.036 SN1D TEST CASE PRINTED OUTPUT 4244
NEA0598_01.037 SPEKTRM1 TEST CASE PRINTED OUTPUT 380
NEA0598_01.038 SPEKTRUM TEST CASE PRINTED OUTPUT 380
NEA0598_01.039 SPEKTRUS TEST CASE PRINTED OUTPUT 1558
NEA0598_01.040 WQGAS TEST CASE PRINTED OUTPUT 282
NEA0598_01.041 WQGAS1 TEST CASE PRINTED OUTPUT 464
NEA0598_01.042 WQPACK TEST CASE PRINTED OUTPUT 163
NEA0598_01.043 WQS TEST CASE PRINTED OUTPUT 3334
NEA0598_01.044 THERM. LIB 1 DCB=(RECFM=V,BLKSIZE=19068) 43
NEA0598_01.045 THERM. LIB 2 DCB=(RECFM=V,BLKSIZE=19068) 47
NEA0598_01.046 THERM. LIB 3 DCB=(RECFM=V,BLKSIZE=19068) 43
NEA0598_01.047 GGC LIB DCB=(RECFM=V,BLKSIZE=3520) 1185
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17. CATEGORIES
  • B. Spectrum Calculations, Generation of Group Constants and Cell Problems
  • C. Static Design Studies
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics
  • J. Gamma Heating and Shield Design
  • K. Reactor Systems Analysis

Keywords: ENDF/B, burnup, collisions, cross sections, data base systems, diffusion, discrete ordinate method, group constants, modular programming, neutron diffusion equation, neutron flux, neutron spectra, neutron transport theory, one-dimensional, probability, shielding, transport theory, two-dimensional.