last modified: 11-AUG-2001 | catalog | categories | new | search |

NEA-1633 MOSRA-LIGHT.

MOSRA-LIGHT, High Speed 3-D X-Y-Z Nodal Diffusion Code for Vector Computers

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1. NAME OR DESIGNATION OF PROGRAM:  MOSRA-LIGHT.
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2. COMPUTERS
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Program name Package id Status Status date
MOSRA-LIGHT NEA-1633/01 Tested 11-AUG-2001

Machines used:

Package ID Orig. computer Test computer
NEA-1633/01 UNIX W.S. Linux-based PC,DEC ALPHA W.S.,SGI W.S.,HP W.S.
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3. DESCRIPTION OF PROGRAM OR FUNCTION

MOSRA-Light is a three-dimensional neutron diffusion calculation code for X-Y-Z geometry.
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4. METHODS

It is based on the 4th order polynomial nodal expansion method (NEM). As the 4th order NEM is not sensitive to mesh sizes, accurate calculation is possible by the use of coarse meshes of about 20 cm.
The drastic decrease of number of unknowns is a 3-dimensional problem results in very fast computation. Furthermore, it employs newly developed computation algorithm "boundary separated checkerboard sweep method" appropriate to vector computers. This method is very efficient because the speedup factor by vectorization increases, as a scale of problem becomes lager. Speed-up factor compared to the scalar calculation is from 20 to 40 in the case of PWR core calculation. Considering the both effects by the vectorization and the coarse mesh method, total speedup factor is more than 1000 as compared with conventional scalar code with the finite difference method.
The general theory of NEM, the fast computation algorithm, benchmark calculation results and detailed information for usage of this code including input data instruction and sample input data is described in the documentation.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
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6. TYPICAL RUNNING TIME
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7. UNUSUAL FEATURES
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8. RELATED OR AUXILIARY PROGRAMS
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9. STATUS
Package ID Status date Status
NEA-1633/01 11-AUG-2001 Tested at NEADB
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10. REFERENCES
NEA-1633/01, included references:
- Keisuke Okumura:
man.txt: Notes from the author (sep 10, 1999)
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11. HARDWARE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1633/01 FORTRAN-77
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13. SOFTWARE REQUIREMENTS

MOSRA-Light can be available on most of vector or scalar computers with the UNIX or it's similar operating systems (e.g. freeware like Linux). Users can easily install it by the help of the conversation style installer.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHORS

Keisuke OKUMURA
Department of Nuclear Energy System
Tokai Research Establishment
Japan Atomic Energy Research Institute
Tokai-mura, Naka-gun, Ibaraki-ken
Japan
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16. MATERIAL AVAILABLE
NEA-1633/01
\more More-MOSRA installation conductor directory
\smpl Sample problems directory
\src Source directory
\tool Tool directory
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17. CATEGORIES
  • C. Static Design Studies

Keywords: neutron diffusion equation, nodal method, parallel processing, three-dimensional, vectorization.