US PATENT SUBCLASS 976 / DIG 143
.~ Core catchers [G21C-9/00D]


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976 /   HD   NUCLEAR TECHNOLOGY

DIG 139  DD  EMERGENCY PROTECTION ARRANGEMENTS STRUCTALLY ASSOCIATED WITH THE REACTOR (e.g., safety valves provided with pressure equalization devices) [G21C-9/00] *** (emergency cooling arrangements DIG. 196) {6}
DIG 143.~ Core catchers [G21C-9/00D]