Postirradiation annealing of boron carbide pellet irradiated in fast breeder reactor.
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概要
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This paper reports some irradiation effects and recovery behavior of neutron irradiated boron carbide pellets that were used as control rod elements in the Enrico Fermi Fast Breeder Reactor. Measurements were carried out on changes in lattice parameters, thermal expansion, helium release, elastic moduli and microstructure observations by annealing the irradiated pellets at elevated temperatures. The increase in unit cell volume of B4C upon irradiation was found to be 0.22%. The recovery in lattice parameter began at around 500°C and completed at 1, 000°C. It was found that the pellet showed a sharp increase in a dimensional change at about 700 to 800°C with a large amount of helium release, and the pellet which showed larger swelling released smaller amount of helium.
- 一般社団法人 日本原子力学会の論文
著者
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Maruyama Tadashi
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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WAKASA Tsutomu
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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SUZUKI Hiroshige
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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