[2E08-13] Nitride fuel

[2E08] R&D on Nitride Fuel Ctcle for MA Transmutation to Enhance Safety and Economy

(14)Dimensional Recovery of He-accumulated Nitride Pellet Containing Cm by Annealing

*Masahide Takano¹, Seiya Takaki¹ (1. JAEA)

Keywords:Minor actinide, Transmutation, Nitride fuel, He gas swelling, Defect recovery

We performed annealing experiments on a Cm-bearing nitride fuel pellet, in which Frenkel defects and He atoms accumulated due to alpha decay at room temperature, and obtained data on dimensional change arrising from defect recovery and gaseous He release. By comparing the annealing curve and cross-sectional images with those for the Cm-bearing dioxide, we found that the mechanism of the nitride behavior at high temperatures is different from that of dioxide.