US PATENT SUBCLASS 976 / DIG 130
.~.~ By displacement of a fluid or fluent neutron-absorbing material (e.g., by adding neutron absorbing material to the coolant) [G21C-7/22]


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976 /   HD   NUCLEAR TECHNOLOGY

DIG 113  DD  CONTROL OF NUCLEAR REACTION [G21C-7/00] {9}
DIG 117  DD  .~ By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [G21C-7/06] {3}
DIG 130.~.~ By displacement of a fluid or fluent neutron-absorbing material (e.g., by adding neutron absorbing material to the coolant) [G21C-7/22]