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Each FNR has four airlocks. Two airlocks are intended for transferring fuel bundles. The other two airlocks are intended for transferring other equipment such as intermediate heat exchange bundles and people. Each fuel bundle transfer airlock is designed to accept a fuel bundle transporation container. Each equipment transfer airlock has minimum internal dimensions of 10.0 m long X 1.5 m ___wide X ____ m high.
The two airlocks intended for transferring fuel bundles are equipped to interface with the 40 tonne fuel bundle shipping containers. The other two airlocks are fitted to also enable entrance and exit of suitably suited workers.
Fuel bundle transfer airlocks are pumped down to a vacuum to prevent air entry into the sodium pool space and to prevent loss of argon.
The inside airlock doors are temperature protected to prevent thermal damage to their door seals. The inside fuel bundle transfer airlock doors open onto guide trays up to 2 m wide which overlap the sodium pool by about 6 m.
This web page last updated November 26, 2023
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