Impact of Cooling Rate on the Durability of PHA Glasses

Edwards, T.B.

Savannah River Site (S.C.)

关键词: Waste Forms;    Radioactive Waste Processing;    Phase Studies;    Glass;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;   

DOI  :  10.2172/781735
RP-ID  :  WSRC-TR-2001-00123 Rev. 0
RP-ID  :  AC09-96SR18500
RP-ID  :  781735

美国|英语

来源: UNT Digital Library

【 摘 要 】

This study was conducted to determine the effect, if any, on the PCT responses of glasses cooled at different rates. Two bounding cooling profiles were used in this study: rapidly quenched and a canister centerline cooling curve. Glasses were selected based on a number of criteria, but mainly to challenge the regions where amorphous phase separation is expected based upon current model predictions. The current DWPF homogeneity constraint, imposed to preclude regions of phase separation, predicted that most of the glasses selected would be phase separated. It was, therefore, important to ensure that deleterious phase separation does not occur at either cooling profile. In this case, deleterious phase separation is defined as the formation of an amorphous phase in the glass that significantly decreases the glass durability as measured by the PCT response.