Nuclear reactor with irradiation shields for pressure vessel welds.

摘要

The invention relates to a nuclear reactor including means for reducing the exposure of pressure vessel welds to fast neutron flux.
<??>Localized peripheral core regions opposite the welds are provided with rod assemblies made up of neutron absorbing materials and/or neutron reflecting material, and which assemblies are tailored to serve as irradiation shields for the welds without substantially reducing core ratings or adversely affecting reactor shutdown margins.