| 摘要 |
A passive nuclear reactor safety shutdown device includes a neutron absorber alloy, normally poised above the core, which melts and flows down by gravity into hollow tubes in each fuel bundle to shut down the reactor. The shutdown, in one form of the safety device, occurs within a minute of the heat transfer fluid reaching the trip temperature. The device cannot be removed when fuel bundle is in the core due to a special interlock system.
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