CONTROL ROD

PURPOSE:To enhance the annihilation efficiency TRUW and facilitate control by providing a region containing the TRUW of a control rod into a reactor core. CONSTITUTION:The absorber rod 1 of a control rod contains BC pellets 3 and TRUW pellets 4 in a clad tube 2, and the pellets 3 are loaded at an up...

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Bibliographic Details
Main Authors KAWASHIMA KATSUYUKI, HAYASE TAMOTSU
Format Patent
LanguageEnglish
Published 20.10.1989
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:PURPOSE:To enhance the annihilation efficiency TRUW and facilitate control by providing a region containing the TRUW of a control rod into a reactor core. CONSTITUTION:The absorber rod 1 of a control rod contains BC pellets 3 and TRUW pellets 4 in a clad tube 2, and the pellets 3 are loaded at an upper half of the rod 1 to form a neutron absorption region and the pellets 4 are loaded at a lower half of the rod to form TRUW-containing region. Each region has the same length as a core height. By this constitution, the TRUW inserted into the core as a control rod turns into fission products through a fission reaction by neutrons from the reactor core and the pellets 4 are not restricted by a burnup of a fuel assembly because they are independent from the fuel assembly. Therefore, the burnup of the TRUW is improved, a recovery loss is lowered and an annihilation efficiency of TRUW can be increased.
Bibliography:Application Number: JP19880091500