Impact of Uranium Levels ON Sludge Batch 2 Simulant Processing

BANNOCHIE, CHRISTOPHERJ.

Savannah River Site (S.C.)

关键词: Evaporators;    Heat Transfer;    Uranium;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Sludges;   

DOI  :  10.2172/830591
RP-ID  :  WSRC-TR-2004-00206
RP-ID  :  AC09-96SR18500
RP-ID  :  830591

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Defense Waste Processing Facility began processing Sludge Batch 2 (SB2) in December of 2001. Since the introduction of the first SRAT batch of SB2, processing issues have been observed in the Sludge Receipt and Adjustment Tank, Slurry Mix Evaporator Melter Feed Tank and the melter. These issues coincided with the start of Batch 209, the first full batch from SB2a5. The issues involved the ability to transfer process slurries and feed the melter, difficulty maintaining heat transfer in the SME, and degradation of the operation of the melter. One of the primary differences between Sludge Batch 2 and the previous Sludge Batches is the increased content of uranium. The Savannah River National Laboratory was requested by DWPF via Technical Task Request HLW/DWPF TTR-02-0035 to determine if the processing issues are related to the elevated levels of uranium in SB21. The work reported here is intended to address only a portion of TTR-0035, specifically the impact of uranium on Sludge Batch 2. This work is governed by a Task Technical and Quality Assurance Plan 2 and an Analytical Study Plan 3. SRNL conducted small-scale tests designed to determine the effect of different levels of uranium on sludge processing at the same redox and stoichiometric factor, 0.20 and 130 respectively. Samples used a series of uranium levels in a simulant of SB2. The samples with different uranium contents were compared with each other before and after undergoing a simulated SRAT cycle process.