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ASTM Selected Technical Papers
Reactor Dosimetry: Radiation Metrology and Assessment
By
JG Williams
JG Williams
1
ASTM Program Chair
?
University of Arizona
?
Tucson, AZ
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DW Vehar
DW Vehar
2
Symposium Vice-Chair and Secretary
?
Sandia National Laboratories
?
Albuquerque, NM
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FH Ruddy
FH Ruddy
3
Symposium Chair
?
Westinghouse Science & Technology Ctr.
?
Pittsburgh, PA
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DM Gilliam
DM Gilliam
4
ASTM Program Vice-Chair
?
National Institute of Standards & Technology
?
Gaithersburg, MD
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ISBN-10:
0-8031-2884-3
ISBN:
978-0-8031-2884-2
No. of Pages:
897
Publisher:
ASTM International
Publication date:
2001

We use the VENUS-3 experimental benchmark to examine the accuracy and parallel performance of PENTRAN™ (Parallel Environment Neutral-particle TRANsport), a three- dimensional parallel Sn code. VENUS-3 with its partial length assemblies is a 3-D benchmark with 370 measurements (58Ni(n,p), 115In(n,n'), and 27Al(n,α) dosimeters). PENTRAN results are very close to experimental results; more than 95% of the Calculated-to-experimental (C/E) values are within ±10%. The remaining 5% of the values are within ±10% and ±15%. The PENTRAN calculation (with 84748 spatial meshes, 80 directions, and 26 energy groups) is performed on an IBM SP2 parallel computer using different numbers of processors and different parallel algorithms. It is demonstrated that PENTRAN requires less than 1.4 hrs wall-clock time on32 processors, and it exhibits an excellent parallel performance with a scalability of ̃90%.

1.
Leenders
,
L.
,
LWR-PVS Benchmark Experiment VENUS-3 (with Partial Length Shielded Assemblies)
,
SCK•CEN
,
Mol, Belgium
, FCP/VEN/01 (
09
1988
).
2.
Sjoden
,
G. E.
, and
Haghighat
,
A.
,
PENTRAN—Parallel Environment Neutral-particle TRANsport Version 4.33
, Manual, Nuclear Engineering Program,
Penn State University
,
University Park
(
09
1996
).
3.
Sjoden
,
G. E.
, and
Haghighat
,
A.
, “
PENTRAN—A 3-D Cartesian Parallel Sn Code with Angular, Energy, and Spatial Decomposition
,”
Proceedings of the Joint International Conference on Mathematical Methods and Supercomputing in Nuclear Applications
, Vol.
II
,
Saratoga Springs
,
NY
(Oct. 6–10, 1997). pp. 1267–1276.
4.
Haghighat
,
A.
,
PENMSH ver. 3.2, A 3-D Cartesian Mesh Generator
, Manual, Nuclear Engineering Program,
Perm State University
,
University Park
(
05
1999
).
5.
Gropp
,
W.
,
Lusk
,
E.
, and
Skjellum
,
A.
,
USING MPI—Portable Parallel Programming with Message-Passing Interface
,
MIT Press
(
1995
).
6.
Petrovic
,
B.
and
Haghighat
,
A.
, “
New Directional ϴ-Weighted Sn Differencing Scheme and Reduction of Estimated Pressure Vessel Fluence Uncertainty
,”
Reactor Dosimetry
, edited by
Abderrahim
H. AÏt
,
D'hondt
Pierre
, and
Osmera
Bohumil
,
World Scientific Publishing Co.
(
1998
). pp. 746–753.
7.
Sjoden
,
G. E.
, and
Haghighat
,
A.
, “
The Exponential Directional Weighted (EDW) Sn Differencing Scheme in 3-D Cartesian Geometry
,”
Proceedings of the Joint International Conference on Mathematical Methods and Supercomputing in Nuclear Applications
, Vol.
I
,
Saratoga Springs
,
NY
(Oct. 6–10 1997). pp. 553–562.
8.
Sjoden
,
G. E.
, and
Haghighat
,
A.
, “
Taylor Projection Mesh Coupling Between 3-D Discontinuous Grids for Sn
,”
Transaction of American Nuclear Society
., Vol.
74
(
06
1996
). pp. 178–179.
9.
BUGLE-96: Coupled 47 Neutron, 20 Gamma-Ray Group Cross Section Library Derived from ENDF/B-VI for LWR Shielding and Pressure Vessel Dosimetry Applications
, DLC-96,
ORNL
,
Oak Ridge, TN
(
03
1996
).
10.
VENUS-3 Three-Dimensional Benchmark on Ex-Core Dosimetry Computations
, NEA/NSC/DOC(97)12 (
07
1997
).
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