Analysis of Induced Gas Releases During Retrieval of Hanford Double-Shell Tank Waste

Wells, Beric E.

Pacific Northwest National Laboratory (U.S.)

关键词: 08 Hydrogen;    Flammability;    Radioactive Wastes;    Wastes;    Vitrification;   

DOI  :  10.2172/15010195
RP-ID  :  PNNL-13782 Rev. 1 Addendum
RP-ID  :  AC05-76RL01830
RP-ID  :  15010195

美国|英语

来源: UNT Digital Library

【 摘 要 】

Checklist for Technical Peer Review for PNNL-13782 Rev. 1 as requested to ensure that software used to support the DSA is compliant with software QA requirements. Radioactive waste is scheduled to be retrieved from Hanford double-shell tanks AN-103, AN-104, AN-105 and AW-101 and transferred to the vitrification plant beginning in about 2009. Retrieval may involve decanting the supernatant liquid and/or mixing the waste with jet pumps. In these four tanks, which contain relatively large volumes of retained gas, both operations are expected to induce buoyant displacement gas releases that can potentially raise the tank headspace hydrogen concentration to a level very near the lower flammability limit. This report describes the theory and detailed physical models for both the supernatant decant and jet mixing processes and presents the results from applying the models to these operations in the four tanks. The technical bases for input parameter distributions are elucidated.