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Title: Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale

Abstract

Plutonium and americium are present in the Hanford High Level Liquid Waste complexant concentrate (CC) waste due to the presence of complexing agents including di-(2-ethylhexyl) phosphoric acid (D2EHPA), tributylphosphate (TBP), hydroxyethylene diamine triacetic acid (HEDTA), ethylene diamine tetraacetic acid (EDTA), citric acid, glycolic acid, and sodium gluconate. The transuranic (TRU) concentrations approach 600 nCi/g and require processing prior to encapsulation into low activity glass. The Savannah River Technology Center (SRTC) has been actively participating in the development of a strontium/TRU decontamination process for the CC waste stored at Hanford in Tanks AN-107 and AN-102. The current baseline flowsheet involves the addition of strontium nitrate to effectively remove radio-strontium through an isotopic dilution, followed by a sodium permanganate strike to co-precipitate the actinides in the in-situ produced manganese solid phases. Demonstration efforts to validate the Sr/TRU flowsheet have included beaker scale reagent optimization and reaction kinetics testing and engineering scale-up experiments at the multi-liter and 1/100th plant scale (200-gallon) using both simulated and actual waste samples. Several key process engineering and process chemistry needs were identified during a recent Hanford Waste Treatment Plant project risk review.

Authors:
Publication Date:
Research Org.:
Savannah River Site (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
808208
Report Number(s):
WSRC-MS-2003-00110
TRN: US0301973
DOE Contract Number:  
AC09-96SR18500
Resource Type:
Conference
Resource Relation:
Conference: Plutonium Futures - The Science Conference, Albuquerque, NM (US), 07/06/2003--07/10/2003; Other Information: PBD: 18 Feb 2003
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CHELATING AGENTS; LIQUID WASTES; PLUTONIUM; CHEMICAL REACTION KINETICS; STRONTIUM NITRATES; RADIOACTIVE WASTE PROCESSING; HIGH-LEVEL RADIOACTIVE WASTES; AMERICIUM; ALPHA-BEARING WASTES

Citation Formats

Wilmarth, W R. Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale. United States: N. p., 2003. Web.
Wilmarth, W R. Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale. United States.
Wilmarth, W R. Tue . "Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale". United States. https://www.osti.gov/servlets/purl/808208.
@article{osti_808208,
title = {Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale},
author = {Wilmarth, W R},
abstractNote = {Plutonium and americium are present in the Hanford High Level Liquid Waste complexant concentrate (CC) waste due to the presence of complexing agents including di-(2-ethylhexyl) phosphoric acid (D2EHPA), tributylphosphate (TBP), hydroxyethylene diamine triacetic acid (HEDTA), ethylene diamine tetraacetic acid (EDTA), citric acid, glycolic acid, and sodium gluconate. The transuranic (TRU) concentrations approach 600 nCi/g and require processing prior to encapsulation into low activity glass. The Savannah River Technology Center (SRTC) has been actively participating in the development of a strontium/TRU decontamination process for the CC waste stored at Hanford in Tanks AN-107 and AN-102. The current baseline flowsheet involves the addition of strontium nitrate to effectively remove radio-strontium through an isotopic dilution, followed by a sodium permanganate strike to co-precipitate the actinides in the in-situ produced manganese solid phases. Demonstration efforts to validate the Sr/TRU flowsheet have included beaker scale reagent optimization and reaction kinetics testing and engineering scale-up experiments at the multi-liter and 1/100th plant scale (200-gallon) using both simulated and actual waste samples. Several key process engineering and process chemistry needs were identified during a recent Hanford Waste Treatment Plant project risk review.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {2}
}

Conference:
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