US PATENT SUBCLASS 976 / DIG 223
.~.~ Moderator or coolant boiling detection [G21C-17/02M]

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976 /   HD   NUCLEAR TECHNOLOGY

DIG 207  DD  MONITORING; TESTING; MAINTAINING [G21C-17/00] {9}
DIG 215  DD  .~ Devices or arrangements for monitoring coolant or moderator [G21C-17/02] {7}
DIG 223.~.~ Moderator or coolant boiling detection [G21C-17/02M]