Summary report on the fuel performance modeling of the AFC-2A, 2B irradiation experiments

Medvedev, Pavel G.

Idaho National Laboratory

关键词: 11 Nuclear Fuel Cycle And Fuel Materials Bison;    Rare Earth Elements;    Bison;    Transmutation;    Metallic Fuel;   

DOI  :  10.2172/1111012
RP-ID  :  INL/EXT-13-30006
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1111012

美国|英语

来源: UNT Digital Library

【 摘 要 】

The primary objective of this work at the Idaho National Laboratory (INL) is to determine the fuel and cladding temperature history during irradiation of the AFC-2A, 2B transmutation metallic fuel alloy irradiation experiments containing transuranic and rare earth elements. Addition of the rare earth elements intends to simulate potential fission product carry-over from pyro-metallurgical reprocessing. Post irradiation examination of the AFC-2A, 2B rodlets revealed breaches in the rodlets and fuel melting which was attributed to the release of the fission gas into the helium gap between the rodlet cladding and the capsule which houses six individually encapsulated rodlets. This release is not anticipated during nominal operation of the AFC irradiation vehicle that features a double encapsulated design in which sodium bonded metallic fuel is separated from the ATR coolant by the cladding and the capsule walls. The modeling effort is focused on assessing effects of this unanticipated event on the fuel and cladding temperature with an objective to compare calculated results with the temperature limits of the fuel and the cladding.