SLUDGE WASHING AND DEMONSTRATION OF THE DWPF FLOWSHEET IN THE SRNL SHIELDED CELLS FOR SLUDGE BATCH 5 QUALIFICATION

Pareizs, J ; Cj Bannochie, C ; Damon Click, D ; Dan Lambert, D ; Michael Stone, M ; Bradley Pickenheim, B ; Amanda Billings, A ; Ned Bibler, N

关键词: AR FACILITIES;    ALUMINIUM;    CONTAINERS;    DECONTAMINATION;    DISSOLUTION;    EVAPORATORS;    FABRICATION;    FLOWSHEETS;    GLASS;    LIQUID WASTES;    MERCURY;    NITRITES;    QUALITY ASSURANCE;    RHEOLOGY;    SLUDGES;    SODIUM;    STORAGE FACILITIES;    TANKS;    VITRIFICATION;    WASHING;    WASTE PROCESSING;   

DOI  :  10.2172/943577
RP-ID  :  SRNS-STI-2008-00111
PID  :  OSTI ID: 943577
Others  :  TRN: US0900515

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Sludge Batch 5 (SB5) is predominantly a combination of H-modified (HM) sludge from Tank 11 that underwent aluminum dissolution in late 2007 to reduce the total mass of sludge solids and aluminum being fed to the Defense Waste Processing Facility (DWPF) and Purex sludge transferred from Tank 7. Following aluminum dissolution, the addition of Tank 7 sludge and excess Pu to Tank 51, Liquid Waste Operations (LWO) provided the Savannah River National Laboratory (SRNL) a 3-L sample of Tank 51 sludge for SB5 qualification. SB5 qualification included washing the sample per LWO plans/projections (including the addition of a Pu/Be stream from H Canyon), DWPF Chemical Process Cell (CPC) simulations, waste glass fabrication (vitrification), and waste glass chemical durability evaluation. This report documents: (1) The washing (addition of water to dilute the sludge supernatant) and concentration (decanting of supernatant) of the Tank 51 qualification sample to adjust sodium content and weight percent insoluble solids to Tank Farm projections. (2) The performance of a DWPF CPC simulation using the washed Tank 51 sample. This includes a Sludge Receipt and Adjustment Tank (SRAT) cycle, where acid is added to the sludge to destroy nitrite and remove mercury, and a Slurry Mix Evaporator (SME) cycle, where glass frit is added to the sludge in preparation for vitrification. The SME cycle also included replication of five canister decontamination additions and concentrations. Processing parameters for the CPC processing were based on work with a non radioactive simulant. (3) Vitrification of a portion of the SME product and Product Consistency Test (PCT) evaluation of the resulting glass. (4) Rheology measurements of the initial slurry samples and samples after each phase of CPC processing. This work is controlled by a Task Technical and Quality Assurance Plan (TTQAP) , and analyses are guided by an Analytical Study Plan. This work is Technical Baseline Research and Development (R&D) for the DWPF.