Potential for Buoyant Displacement Gas Release Events in Tank 241-SY-102 after Waste Transfer from Tank 241-SY-101.

Wells, B. E. ; Meyer, P. A. ; Chen, G.

Technical Information Center Oak Ridge Tennessee

关键词: Radioactive wastes;    Tanks;    Gas release;    Monte Carlo method;    Radioactive waste storage;   

RP-ID  :  DE200215001061

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Tank 241-SY-101 (SY-101) is a double-shell storage tank with radioactive waste that, before the recent transfer and water back dilution operations, was capable of retaining gas and producing flammable buoyant displacement (BD) gas release events (GREs). A BD GRE occurs when a portion of the nonconnective layer retains enough gas to become buoyant, rises to the waste surface, breaks up, and releases some of its stored gas. The installation of a mixer pump in 1993 successfully mitigated gas retention in the settled solids layer in SY-101 and has since prevented BD GREs. However, mixer pump operation over the years since then has caused gas retention in the floating crust layer and a corresponding accelerating waste level growth. To reverse these effects, sequences of waste removal and water back-dilution were initiated in December 1999. In planning for these operations, there was some concern that adding the SY-101 waste into SY- 102 could create a waste configuration capable of BD GREs. This report updates and extends earlier assessments of the potential for BD GRE conditions in SY-102 after waste is transferred from SY-101.