Effects of cooling time on a closed LWR fuel cycle

Ramsey P. Arnold, Charles W. Forsberg, Eugene Shwageraus

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this study, the effects of cooling time prior to reprocessing spent LWR fuel has on the reactor physics characteristics of a PWR fully loaded with homogeneously mixed U-Pu or U-TRU oxide (MOX) fuel is examined. A reactor physics analysis was completed using the CASM04e code. A void reactivity feedback coefficient analysis was also completed for an infinite lattice of fresh fuel assemblies. Some useful conclusions can be made regarding the effect that cooling time prior to reprocessing spent LWR fuel has on a closed homogeneous MOX fuel cycle. The computational analysis shows that it is more neutronically efficient to reprocess cooled spent fuel into homogeneous MOX fuel rods earlier rather than later as the fissile fuel content decreases with time. Also, the number of spent fuel rods needed to fabricate one MOX fuel rod increases as cooling time increases. In the case of TRU MOX fuel, with time, there is an economic tradeoff between fuel handling difficulty and higher throughput of fuel to be reprocessed. The void coefficient analysis shows that the void coefficient becomes progressively more restrictive on fuel Pu content with increasing spent fuel cooling time before reprocessing.

Original languageEnglish
Title of host publicationInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012
Pages2407-2414
Number of pages8
StatePublished - 19 Nov 2012
Externally publishedYes
EventInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012 - Chicago, IL, United States
Duration: 24 Jun 201228 Jun 2012

Publication series

NameInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012
Volume4

Conference

ConferenceInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012
Country/TerritoryUnited States
CityChicago, IL
Period24/06/1228/06/12

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