Fiscal Year 2010 Summary Report on the Epsilon-Metal Phase as a Waste Form for 99 Tc

Strachan, Denis M. ; Crum, Jarrod V. ; Buck, Edgar C. ; Riley, Brian J. ; Zumhoff, Mac R.

关键词: epsilon-metal;    technetium immobiliztion;    waste form;    arc melting;   

DOI  :  10.2172/1124051
RP-ID  :  PNNL-19828
PID  :  OSTI ID: 1124051
Others  :  Other: AF5805010

美国|英语

来源: SciTech Connect

【 摘 要 】

Epsilon metal (??-metal) is generated in nuclear fuel during irradiation. This metal consists of Pd, Ru, Rh, Mo, and some Te. These accumulate at the UO2 grain boundaries as small (ca 5 ??m) particles. These metals have limited solubility in the acid used to dissolve fuel during reprocessing and in typical borosilicate glass. These must be treated separately to improve overall waste loading in glass. This low solubility and their survival in 2 Gy-old natural reactors led us to investigate them as a waste form for the immobilization of 99Tc and 107Pd, two very long-lived isotopes.