Fracture boundary of unirradiated fuel cladding with a pinhole under LOCA condition

LOCA条件下におけるピンホールあり未照射被覆管の破損限界

小宮山 大輔

Komiyama, Daisuke

To understand the behaviors of leaker fuels under LOCA condition, the difference in fracture boundaries between normal and leaker fuels was investigated by semi-integral LOCA tests for the test rods with/without a pinhole. The fracture boundary of test rods with a pinhole was similar to that of reference test rods below 1200 C, but a little bit lower above 1200 C under fully restrained condition; while under 540 N partially restrained condition, it was a little higher in the case of test rods with a pinhole.