DEMONSTRATION OF THE DWPF FLOWSHEET IN THE SRNL SHIELDED CELLS WITH TANK 40 AND H CANYON NEPTUNIUM

Pareizs, J ; Bradley Pickenheim, B ; Cj Bannochie, C ; Michael Stone, M

关键词: CONTROL;    CORROSION;    EVAPORATORS;    FLOWSHEETS;    INTERSTITIAL HYDROGEN GENERATION;    LIQUID WASTES;    LIQUIDS;    MATERIALS;    MERCURY;    NATIONAL DEFENSE;    NEPTUNIUM;    NITRATES;    NITRITES;    PROCESSING;    PUMPS;    RADIOISOTOPES;    RHEOLOGY;    SAVANNAH RIVER PLANT;    SLUDGES;    SODIUM;    SOLUTIONS;    SPECIFICATIONS;    STORAGE FACILITIES;    STREAMS;    STRIPPING;    TANKS;    TESTING;    WASTE PROCESSING;    WASTES;   

DOI  :  10.2172/953477
RP-ID  :  SRNS-STI-2009-00233
PID  :  OSTI ID: 953477
Others  :  TRN: US201002%%1553

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The Defense Waste Processing Facility (DWPF) is currently processing Sludge Batch 5 (SB5) from Tank 40. SB5 contains the contents of Tank 51 from November 2008, qualified by the Savannah River National Laboratory (SRNL) and the heel in Tank 40 remaining from Sludge Batch 4. Current Liquid Waste Operations (LWO) plans are to (1) decant supernatant from Tank 40 to remove excess liquid caused by a leaking slurry pump and (2) receive a Np stream from H Canyon It should be noted that the Np stream contains significant nitrate requiring addition of nitrite to Tank 40 to maintain a high nitrite to nitrate ratio for corrosion control. SRNL has been requested to qualify the proposed changes; determine the impact on DWPF processability in terms of hydrogen generation, rheology, etc.; evaluate antifoam addition strategy; and evaluate mercury stripping. Therefore, SRNL received a 3 L sample of Tank 40 following the transfer of Tank 51 to Tank 40 (Tank Farm Sample HTF-40-08-157 to be used in testing and to perform the required Waste Acceptance Product Specifications radionuclide analyses). Based on Tank Farm projections, SRNL decanted a portion* of the sample, added sodium nitrite, and added a Np solution from H Canyon representative of the Np to be dispositioned to Tank 40 (neutralized to 0.6 M excess hydroxide). The resulting material was used in a DWPF Chemical Process Cell (CPC) demonstration -- a Sludge Receipt and Adjustment Tank (SRAT) cycle and a Slurry Mix Evaporator (SME) cycle. Preliminary data from the demonstration has been reported previously. This report includes discussion of these results and additional results, including comparisons to Tank Farm projections and the SB5 demonstration.