Control rod and reactor core of BWR type reactor
Creators
- 1. Hitachi Ltd., Tokyo (Japan)
Description
A control rod is prepared by arranging a large number of neutron control rods filled with B4C as a neutron absorber in a row and contained in a sheath. The sheaths are welded to a support member passing the central portion of the control rod. The neutron absorbing rod is prepared by filling B4C power in an elongated cladding tube made of a stainless steel. The inside of the cladding tube is partitioned in a large number in vertical direction by stainless steel partitioning balls. The control rod is partitioned in two to upper and lower regions at substantially the intermediate portion of the entire length, namely, at a position where the distance from the upper end is about 1/2 of the entire length of the control rod. B4C comprising 10B enriched boron is filled to the upper region, and B4C comprising natural boron is filled as a starting material to the lower region. Then, the amount of enriched boron can be reduced while ensuring the control rod worth as a whole and improving the reactor scram margin. (I.N.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 7 p.
- IPC:
- Int. Cl. G21C7/10; G21C5/00; G21C7/113
- IPC
- Int. Cl. G21C7/10; G21C5/00; G21C7/113
- Patent number
- JP patent document 10-39072/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 29038135
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BORON; BORON CARBIDES; BWR TYPE REACTORS; CAPSULES; CONTROL ELEMENTS; NEUTRON ABSORBERS; PARTITION; REACTOR CORES; STAINLESS STEELS
- Descriptors DEC
- ALLOYS; BORON COMPOUNDS; CARBIDES; CARBON ADDITIONS; CARBON COMPOUNDS; CONTAINERS; ELEMENTS; ENRICHED URANIUM REACTORS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; POWER REACTORS; REACTOR COMPONENTS; REACTORS; SEMIMETALS; STEELS; THERMAL REACTORS; TRANSITION ELEMENT ALLOYS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- JP patent application 8-189266