Abstract

This report discusses four-foot-long sections of a new production light-water reactor (NP-LWR) generic tritium target rod which were tested to determine if the length of the pellet pencils affects the amount of pellet material relocated during a burst and to characterize the burst. This testing was conducted as a follow-on study of cladding strength and pellet relocation behavior of short target rod specimens [11 cm (4-4 in.)]. The results of these tests could be used to support safety analyses of the effects of rod bursting and pellet relocation on the performance of a NP-LWR reactor core during a postulated loss-of-coolant accident (LOCA). All burst tests of the target rods were performed in air because air is more reactive than the air-steam or water environment that accompanies a LOCA.

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