Characterisation and Durability of a Vitrified Wasteform for Simulated Chrompik III Waste

• 발행기관: 한국방사성폐기물학회
• 저자명: Sam A. Walling Laura J. Gardner H.K. Celine Pang Colleen Mann Claire L. Corkhill Alexandra Mikusova Peter Lichvar Neil C. Hyatt
• 간행물 정보: 『Journal of Nuclear Fuel Cycle and Waste Technology (JNFCWT)』Vol.19 No.3, 339~352쪽, 전체 14쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2021.09.30

국문 초록

Legacy waste from the decommissioned A-1 nuclear power plant in the Slovak Republic is scheduled for immobilisation within a tailored alkali borosilicate glass formulation, as part of ongoing site cleanup. The aqueous durability and characterisation of a simulant glass wasteform for Chrompik III legacy waste, was investigated, including dissolution experiments up to 112 days (90°C, ASTM Type 1 water). The wasteform was an amorphous, light green glassy product, with no observed phase separation or crystalline inclusions. Aqueous leach testing revealed a suitably durable product over the timescale investigated, comparing positively to other simulant nuclear waste glasses and vitreous products tested under similar conditions. Iron and titanium rich precipitates were observed to form at the surface of monolithic samples during leaching, with the formation of an alkali deficient alteration layer behind these at later ages. Overall this glass appears to perform well, and in line with expectations for this chemistry, although longer-term testing would be required to predict overall durability. This work will contribute to developing confidence in the disposability of vitrified Chrompik legacy wastes.

키워드

Higher activity waste Vitrification Glass Durability Characterisation Chrompik