Assertion: moderator | /r/CapableOf | sustain a chain reaction
Facets:
Source sentences:
text: This explains why most reactors fueled with 235U need a moderator to sustain a chain reaction and why removing a moderator can shut down a reactor.
text: This explains why most reactors fueled withU need a moderator to sustain a chain reaction and why removing a moderator can shut down a reactor.