Purposely Defected UO sub 2 -Zircaloy Fuel Elements Irradiated in Pressurized Light Water at Linear Powers of 55 KW/M

摘要

The FDO-87 experiment consisted of three separate irradiation tests of purposely defected Zircaloy clad UO sub 2 fuel elements. The elements were irradiated at linear heat outputs between 53 and 58 kW/m for in-reactor times up to 950 hours. The fission products released from the defected elements into the hot pressurized water coolant were continuously monitored by an on-line gamma -ray spectrometer. Steady state fission product release rates were established as functions of irradiation time, the decay constant (lambda), hole size and shape, and fuel burnup. Transient releases were measured for trip and controlled reactor shutdowns, reactor startups and power cycles. (Atomindex citation 16:042459)