Evaluation of spectral history effects in B&W PWRs using Studsvik CMS

Journal Article · Sun Dec 31 04:00:00 EST 1995 · Transactions of the American Nuclear Society

OSTI ID:411765

Borland, R J ^[1]; Fu, H ^[2]

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1. Centerior Energy, Inc., Perry, OH (United States)
2. GPU Nuclear Corporation, Parsippany, NJ (United States)

Spectral history effects (the effect of spectral hardening or softening on {sup 235}U depletion and transuranic isotope buildup) have long been recognized as important considerations in correctly modeling the neutronic behavior of pressurized water reactors (PWRs). However, only with the recent generation of reactor physics modeling capabilities has it been possible to accurately quantify the impact of spectral history effects. In this effort, the Studsvik Core Management System of codes (CASMO-3/SIMULATE-3) has been used to evaluate spectral history effects for two different Babcock & Wilcox PWRs. SIMULATE-3 is an advanced nodal core simulator, which employs a macroscopic cross-section model using two-group cross-section data from the CASMO-3 two-dimensional transport theory fuel assembly depletion code. SIMULATE-3 is unique because it employs weighing factors to provide more weight to recent depletion conditions than to older histories.

• OSTI ID: 411765
• Report Number(s): CONF-951006--
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 73; ISSN 0003-018X; ISSN TANSAO
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BURNUP
BWR TYPE REACTORS
C CODES
FUEL CYCLE
MODERATORS
PWR TYPE REACTORS
REACTIVITY COEFFICIENTS
REACTOR CORES
SPECTRAL HARDENING
TEMPERATURE COEFFICIENT