The important information in this chapter is summarized below.
Decay Heat Summary
Decay heat is the amount of heat generated by decay of fission
products after shutdown of the facility.
The amount of decay heat is dependent on the reactors power
Methods for removing decay heat usually fall into one of the
Closed loop systems, where coolant is circulated between the
reactor and a heat exchanger in a closed loop.
exchanger transfers the decay heat to the fluid in the secondary
side of the heat exchanger.
Once through systems, where coolant from a source is injected
into the reactor core. The decay heat is transferred from the fuel
assemblies into the coolant, then the coolant leaves the reactor and
is either collected in a storage structure or released to the
The limits for decay heat are calculated to prevent damage to the
end of text.
DOE - ANL-W, BNL, EG&G Idaho,
DOE - NE-73
EG&G Mound, EG&G Rocky Flats,
Project Number 6910-0018/2
LLNL, LANL, MMES, ORAU, REECo,
WHC, WINCO, WEMCO, and WSRC.