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Title: Evaluation of rodded BWR assembly pin powers with simulate

Abstract

In the development of Studsvik's nodal code SIMULATE5, special attention has been given to the accurate description of pin powers. The code solves the multi-group diffusion or simplified P3 equations with high spatial resolution. A short description is given of the handling of material heterogeneities in the axial and radial directions - the axial re-homogenization and the radial sub-mesh model, respectively. Furthermore, two models which are of special importance in the presence of control rods, and hence on the pellet clad interaction (PCI) phenomenon, are described; the quarter-assembly thermal-hydraulic treatment and the depletion of absorber material. A numerical example for a real core shows that while the impact of the fine grained description is negligible on global parameters such as k{sub eff}, the effect on pin powers may be substantial. For a deeply inserted and highly depleted control rod, the difference in pin powers caused by neglecting the advanced models of SIMULATE5, may be as high as 15 %. (authors)

Authors:
 [1];  [2]
  1. Studsvik Scandpower, Inc., 309 Waverly Oaks Road (United States)
  2. Studsvik Scandpower AB, Stensborgsgatan 4, SE-721 32 Vaesteraas (Sweden)
Publication Date:
Research Org.:
American Nuclear Society, Inc., 555 N. Kensington Avenue, La Grange Park, Illinois 60526 (United States)
OSTI Identifier:
22105576
Resource Type:
Conference
Resource Relation:
Conference: PHYSOR 2012: Conference on Advances in Reactor Physics - Linking Research, Industry, and Education, Knoxville, TN (United States), 15-20 Apr 2012; Other Information: Country of input: France; 6 refs.
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; BWR TYPE REACTORS; CONTROL ELEMENTS; FUEL ASSEMBLIES; FUEL PELLETS; SPATIAL RESOLUTION; THERMAL HYDRAULICS

Citation Formats

Bahadir, T., and Lindahl, S. Oe. Evaluation of rodded BWR assembly pin powers with simulate. United States: N. p., 2012. Web.
Bahadir, T., & Lindahl, S. Oe. Evaluation of rodded BWR assembly pin powers with simulate. United States.
Bahadir, T., and Lindahl, S. Oe. 2012. "Evaluation of rodded BWR assembly pin powers with simulate". United States.
@article{osti_22105576,
title = {Evaluation of rodded BWR assembly pin powers with simulate},
author = {Bahadir, T. and Lindahl, S. Oe.},
abstractNote = {In the development of Studsvik's nodal code SIMULATE5, special attention has been given to the accurate description of pin powers. The code solves the multi-group diffusion or simplified P3 equations with high spatial resolution. A short description is given of the handling of material heterogeneities in the axial and radial directions - the axial re-homogenization and the radial sub-mesh model, respectively. Furthermore, two models which are of special importance in the presence of control rods, and hence on the pellet clad interaction (PCI) phenomenon, are described; the quarter-assembly thermal-hydraulic treatment and the depletion of absorber material. A numerical example for a real core shows that while the impact of the fine grained description is negligible on global parameters such as k{sub eff}, the effect on pin powers may be substantial. For a deeply inserted and highly depleted control rod, the difference in pin powers caused by neglecting the advanced models of SIMULATE5, may be as high as 15 %. (authors)},
doi = {},
url = {https://www.osti.gov/biblio/22105576}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 2012},
month = {Sun Jul 01 00:00:00 EDT 2012}
}

Conference:
Other availability
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