This International Standard provides the basis for calculating the decay heat power of non-recycled nuclear fuel of light water reactors. For this purpose the following components are considered:
— the contribution of the fission products from nuclear fission;
— the contribution of the actinides;
— the contribution of isotopes resuiting from neutron capture in fission products.
This International Standard applies to light water reactors (pressurized water and boiling water reactors) loaded with a nuclear fuel mixture consisting
of 235 U and 238 U. Its application to recycled nuclear fuel is not permissible.
The calculation procedures apply to decay heat periods of 0 and 109 s.
SIS SS-ISO 10 645:1992 history
1992SIS SS-ISO 10 645:1992 Nuclear energy — Light water reactors — Calculation of the decay heat power in nuclear fuels