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

Wells, Beric E. (BATTELLE (PACIFIC NW LAB)) ; Cuta, Judith M. (BATTELLE (PACIFIC NW LAB)) ; Hartley, Stacey A. (BATTELLE (PACIFIC NW LAB)) ; Mahoney, Lenna A. (BATTELLE (PACIFIC NW LAB)) ; Meyer, Perry A. (BATTELLE (PACIFIC NW LAB)) ; Stewart, Charles W. (BATTELLE (PACIFIC NW LAB))

Pacific Northwest National Laboratory (U.S.)

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

DOI  :  10.2172/15001240
RP-ID  :  PNNL-13782
RP-ID  :  AC06-76RL01830
RP-ID  :  15001240

美国|英语

来源: UNT Digital Library

【 摘 要 】

Radioactive waste is scheduled to be retrieved from Hanford double-shell tanks AN-103, AN-104, AN-105 and AW-101 to the vitrification plant beginning 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 of these operations are expected to induce buoyant displacement gas releases that can potentially raise the tank headspace hydrogen concentration to very near the lower flammability limit. This report describes the theory and detailed physical models for both the supernate 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.