Trend in plutonium content of MOX in thermal reactor use and irradiation behavior of MOX with high plutonium content

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Abstract

The uranium enrichment of UO2 fuel for the current power reactors, both PWR and BWR, tends to increase because of increasing burn-up target. The plutonium content of MOX fuel used in thermal reactors shall be determined in order to have reactivity worth equivalent to enriched UO2 fuel based on physical accounting method for adjusting fissile enrichment, thus the plutonium content tends to increase according to the increment of the uranium enrichment of UO2 fuel and this trend shall further be accentuated due to the fact that Pu recovered from reprocessing of the spent high burnup UO2 fuel contains less fissile isotopes. The calculation results indicate that the plutonium content in MOX will evolve to ratios in excess of 10%. It is important to know MOX irradiation behavior with plutonium content >10 wt%. MOX fuel rods having a plutonium content of about 14 wt% and fabricated by the MIMAS process have been irradiated under PWR conditions in the Belgian test reactors BR-3 and BR-2. The MOX rods are investigated by destructive and non-destructive post irradiation examinations and some of them are now continued to be irradiated in BR-2.

Details

Original languageEnglish
Title of host publicationProceedings of Top Fuel 2009
Place of PublicationParis, France
Pages789-796
Volume1
Publication statusPublished - 6 Sep 2009
EventWater Reactor Fuel Performance Meeting / TOPFUEL 2009 - Paris, France
Duration: 6 Sep 200910 Sep 2009

Conference

ConferenceWater Reactor Fuel Performance Meeting / TOPFUEL 2009
Country/TerritoryFrance
CityParis
Period2009-09-062009-09-10

Keywords

  • MOX, CHIPS project, PIE

ID: 141335