Neutron irradiation effects on 11B4C and recovery by annealing
Creators
- 1. Japan Atomic Energy Agency, Oarai Research and Development Center, Fuels and Materials Department, Oarai, Ibaraki (Japan)
- 2. Nuclear Technology and Engineering Corp., Oarai, Ibaraki (Japan)
- 3. Japan Atomic Energy Agency, Fast Breeder Reactor Research and Development Center, Monju Development Department, Tsuruga, Fukui (Japan)
Description
Use of moderator materials in a fast breeder reactor is effective for transmutation technology, and 11B4C is one of the candidates. Up to now, the behavior of 10B4C as the control rod material is well known, but that of 11B4C has hardly been investigated. In this paper, irradiation effects of 11B4C pellet irradiated in the experimental fast reactor JOYO were studied. From the experimental results, it was observed that no macro-cracks were recognized but bubble nucleation was found in the grain and along the grain boundaries of 11B4C. Furthermore, it was shown that the thermal conductivity of 11B4C was higher than that of 10B4C. During the annealing from room temperature to 1400degC, two recovery stages were found on thermal conductivity. It was suggested that the recovery of B4C was related to the volume and distribution of helium bubbles. Since the 11B4C pellet was mechanically more stable compared with the 10B4C pellet under irradiation, it was shown that 11B4C had high applicability for a moderator material. (author)
Additional details
Publishing Information
- Journal Title
- Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi
- Journal Volume
- 115
- Journal Issue
- 1345
- Journal Page Range
- p. 551-555
- ISSN
- 0914-5400
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 39068142
- Subject category
- S36: MATERIALS SCIENCE; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Descriptors DEI
- ANNEALING; BORON 11; BORON CARBIDES; BUBBLES; HELIUM; MATERIALS RECOVERY; MODERATORS; NEUTRONS; NUCLEATION; PELLETS; RADIATION EFFECTS; TEMPERATURE DEPENDENCE; THERMAL CONDUCTIVITY; THERMAL DIFFUSIVITY; TRANSMUTATION
- Descriptors DEC
- BARYONS; BORON COMPOUNDS; BORON ISOTOPES; CARBIDES; CARBON COMPOUNDS; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; FLUIDS; GASES; HADRONS; HEAT TREATMENTS; ISOTOPES; LIGHT NUCLEI; MANAGEMENT; NONMETALS; NUCLEI; NUCLEONS; ODD-EVEN NUCLEI; PHYSICAL PROPERTIES; PROCESSING; RARE GASES; STABLE ISOTOPES; THERMODYNAMIC PROPERTIES; WASTE MANAGEMENT; WASTE PROCESSING
Optional Information
- Notes
- 14 refs., 8 figs.