Antifoam Degradation Products in Off Gas and Condensate of Sludge Batch 9 Simulant Nitric-Formic Flowsheet Testing for the Defense Waste Processing Facility

Smith, T.¹ 

[1]Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

关键词: RADIOACTIVE WASTE PROCESSING;    SLUDGES;    CONDENSATES;    SAVANNAH RIVER PLANT;    TANKS;    ORGANIC SILICON COMPOUNDS;    VAPORS;    GASEOUS WASTES;    TESTING;    DECOMPOSITION;    NITRIC ACID;    FORMI;   

DOI  :  10.2172/1250757
RP-ID  :  SRNL--STI-2016-00110
PID  :  OSTI ID: 1250757
Others  :  TRN: US1601333

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Ten chemical processing cell (CPC) experiments were performed using simulant to evaluate Sludge Batch 9 for sludge-only and coupled processing using the nitric-formic flowsheet in the Defense Waste Processing Facility (DWPF). Sludge Receipt and Adjustment Tank (SRAT) and Slurry Mix Evaporator (SME) cycles were performed on eight of the ten. The other two were SRAT cycles only. Samples of the condensate, sludge, and off gas were taken to monitor the chemistry of the CPC experiments. The Savannah River National Laboratory (SRNL) has previously shown antifoam decomposes to form flammable organic products, (hexamethyldisiloxane (HMDSO), trimethylsilanol (TMS), and propanal), that are present in the vapor phase and condensate of the CPC vessels. To minimize antifoam degradation product formation, a new antifoam addition strategy was implemented at SRNL and DWPF to add antifoam undiluted.