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Title: Bench scale experiments for the remediation of Hanford Waste Treatment Plant low activity waste melter off-gas condensate

Abstract

The Low Activity Waste (LAW) vitrification facility at the Hanford Waste Treatment and Immobilization Plant (WTP) will generate an aqueous condensate recycle stream (LAW Off-Gas Condensate) from the off-gas system. The plan for disposition of this stream during baseline operations is to send it to the WTP Pretreatment Facility, where it will be blended with LAW, concentrated by evaporation and recycled to the LAW vitrification facility again. The primary reason to recycle this stream is so that the semi-volatile 99Tc isotope eventually becomes incorporated into the glass. This stream also contains non-radioactive salt components that are problematic in the melter, so diversion of this stream to another process would eliminate recycling of these salts and would enable simplified operation of the LAW melter and the Pretreatment Facilities. This diversion from recycling this stream within WTP would have the effect of decreasing the LAW vitrification mission duration and quantity of glass waste. The concept being tested here involves removing the 99Tc so that the decontaminated aqueous stream, with the problematic salts, can be disposed elsewhere.

Authors:
 [1];  [1];  [1]
  1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1377029
Report Number(s):
SRNL-STI-2017-00322
TRN: US1801139
DOE Contract Number:  
AC09-08SR22470
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; GAS CONDENSATES; WASTE PROCESSING; WASTES; VITRIFICATION; OFF-GAS SYSTEMS; decontamination; technetium; stannous chloride; chromium

Citation Formats

Taylor-Pashow, Kathryn M.L., Poirier, Michael, and McCabe, Daniel J. Bench scale experiments for the remediation of Hanford Waste Treatment Plant low activity waste melter off-gas condensate. United States: N. p., 2017. Web. doi:10.2172/1377029.
Taylor-Pashow, Kathryn M.L., Poirier, Michael, & McCabe, Daniel J. Bench scale experiments for the remediation of Hanford Waste Treatment Plant low activity waste melter off-gas condensate. United States. doi:10.2172/1377029.
Taylor-Pashow, Kathryn M.L., Poirier, Michael, and McCabe, Daniel J. Fri . "Bench scale experiments for the remediation of Hanford Waste Treatment Plant low activity waste melter off-gas condensate". United States. doi:10.2172/1377029. https://www.osti.gov/servlets/purl/1377029.
@article{osti_1377029,
title = {Bench scale experiments for the remediation of Hanford Waste Treatment Plant low activity waste melter off-gas condensate},
author = {Taylor-Pashow, Kathryn M.L. and Poirier, Michael and McCabe, Daniel J.},
abstractNote = {The Low Activity Waste (LAW) vitrification facility at the Hanford Waste Treatment and Immobilization Plant (WTP) will generate an aqueous condensate recycle stream (LAW Off-Gas Condensate) from the off-gas system. The plan for disposition of this stream during baseline operations is to send it to the WTP Pretreatment Facility, where it will be blended with LAW, concentrated by evaporation and recycled to the LAW vitrification facility again. The primary reason to recycle this stream is so that the semi-volatile 99Tc isotope eventually becomes incorporated into the glass. This stream also contains non-radioactive salt components that are problematic in the melter, so diversion of this stream to another process would eliminate recycling of these salts and would enable simplified operation of the LAW melter and the Pretreatment Facilities. This diversion from recycling this stream within WTP would have the effect of decreasing the LAW vitrification mission duration and quantity of glass waste. The concept being tested here involves removing the 99Tc so that the decontaminated aqueous stream, with the problematic salts, can be disposed elsewhere.},
doi = {10.2172/1377029},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 11 00:00:00 EDT 2017},
month = {Fri Aug 11 00:00:00 EDT 2017}
}

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