THE FUBR-1B IRRADIATION EXPERIMENT - TRITIUM RELEASE AND PHYSICAL STABILITY OF SOLID BREEDER MATERIALS

[摘要] The FUBR-1B irradiation experiment in EBR-II has provided important information on the irradiation behavior of candidate lithium solid breeder materials in a high neutron spectrum. The solid breeder materials include Li2O, LiAlO2, Li1ZrO3, Li8ZrO6 and Li4SiO4 pellets and LiAlO2 spheres. The irradiation behavior of the materials was characterized for the temperature range from 400 to 900-degrees-C. The amount of tritium retained by the solid breeder materials, as well as swelling and physical stability, was determined for specimens removed after the first period of irradiation. LiAlO2, Li2ZrO3, and Li8ZrO6 exhibited excellent dimensional stability during irradiation while the dimensional stability of Li2O was found be dependent on the microstructure. The amount of retained tritium is compared to similar closed capsule experiments and extends the data to burnups as high as 1.6 x 10(21) at/cc.

[发布日期] 1991-03-01