THE EMISSION OF FISSION PRODUCT RARE GASES FROM UO2-BeO AND UO2 –ThO2 –BeO SPECIMENS DURING NEUTRON IRRADIATION IN BEPO

摘要

Emission of fission gases from compacted samples of U02-Be0 and U02-Th02-Be0, in which most of the movement occurs in the BeO grains, is very slow. The concentration change is of the order 5 x 10-9 cm3/sec at 1000°C, Measurements are reported and analysed for both in-pile and out-of-pile conditions over the temperature range 200-1000°C.