Six hydride materials were investigated for eliminating dissociation of hydrogen, which are loaded into a FR. The investigation for the six hydrides was performed for dissociation temperature, melting temperature, capture cross section, production of long-lived nuclides and transmutation performance of minor actinides and long-lived fission products. In the comparison of cross sections and transmutation performances, JENDL-3.2 library was employed, however, JEF-2.2 was also used for 84Sr because the cross section is not included in JENDL-3.2. Among the six materials, the investigation indicated that CaH2 is the most hopeful candidate and ZrV2H4.8 is the second. CaH2 have no problem from the viewpoint of temperature, neutron capture cross section. The transmutation performance of CaH2, which was the same as that of ZrH1.6, is the best among the six. If CaH2 or ZrV2H4.8 is employed in a FR, transmutation of long-lived nuclides is improved without introducing safety problem of positive reactivity insertion by hydrogen dissociation.
- Fast reactor
- Hydride material
- Long-lived fission products
- Minor actinides
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering