Inter-reactor fuel transfer at Wylfa 1&2

摘要

Wylfa 1 is the last magnox-fuelled, carbon-dioxide-cooled, graphite-moderated reactor in operation. The reactor type is so named because of the composition of the magnesium non-oxidizing metal cladding over its natural unenriched (0.7% U-235) or low-enriched (0.8%) uranium metal fuel. Wylfa is also the largest of the fleet, with a capacity of about 490MWe per unit. There are 6156 fuel channels in each unit, each channel holding a stack of eight fuel elements each a metre long. Online refuelling is carried out continually (replacing 200 channels in a two-month cycle) using special machines.