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Title: FPEX gamma-Radiolysis in the Presence of Nitric Acid

Abstract

Abstract: The solvent formulation known as FPEX (Fission Product Extraction) contains calix[4]arene-bis-(tert-octylbenzo-crown-6) (BOBCalixC6) for Cs extraction; 4,4’,(5’)-di-(t-butyldicyclohexano)-18-crown-6 (DtBuCH18C6) for Sr extraction; 1-(2,2,3,3,-tetrafluoropropoxy)-3-(4-sec-butylphenoxy)-2-propanol (Cs-7SB) modifier and trioctylamine (TOA) to aid in Cs stripping, all in Isopar L diluent. This formulation has favorable extraction efficiency for Cs and Sr from acidic solution, and was investigated here for ?-radiation stability. When FPEX was irradiated in contact with aqueous nitric acid, extraction efficiency decreased only slightly when irradiated to absorbed doses as high as 200 kGy. The color of the organic phase changed to a deep yellow-orange, and several new peaks related to radiolysis of the Cs-7SB modifier were detected by GC-ECD analysis. This had little effect on solvent extraction distribution ratios. Possible reasons for this unexpected robustness under conditions of high radiation and acidity are discussed.

Authors:
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
917073
Report Number(s):
INL/JOU-07-12327
Journal ID: ISSN 0736-6299; SEIEDB; TRN: US0804426
DOE Contract Number:  
DE-AC07-99ID-13727
Resource Type:
Journal Article
Journal Name:
Solvent Extraction and Ion Exchange
Additional Journal Information:
Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 0736-6299
Country of Publication:
United States
Language:
English
Subject:
11 - NUCLEAR FUEL CYCLE AND FUEL MATERIALS; COLOR; DISTRIBUTION; EFFICIENCY; FISSION; NITRIC ACID; PH VALUE; RADIATION DOSES; RADIATIONS; RADIOLYSIS; SOLVENT EXTRACTION; SOLVENTS; STABILITY; TRIOCTYLAMINE; calixarene; crown ethers

Citation Formats

mincher,. FPEX gamma-Radiolysis in the Presence of Nitric Acid. United States: N. p., 2007. Web. doi:10.1080/07366290701512477.
mincher,. FPEX gamma-Radiolysis in the Presence of Nitric Acid. United States. doi:10.1080/07366290701512477.
mincher,. Sat . "FPEX gamma-Radiolysis in the Presence of Nitric Acid". United States. doi:10.1080/07366290701512477.
@article{osti_917073,
title = {FPEX gamma-Radiolysis in the Presence of Nitric Acid},
author = {mincher,},
abstractNote = {Abstract: The solvent formulation known as FPEX (Fission Product Extraction) contains calix[4]arene-bis-(tert-octylbenzo-crown-6) (BOBCalixC6) for Cs extraction; 4,4’,(5’)-di-(t-butyldicyclohexano)-18-crown-6 (DtBuCH18C6) for Sr extraction; 1-(2,2,3,3,-tetrafluoropropoxy)-3-(4-sec-butylphenoxy)-2-propanol (Cs-7SB) modifier and trioctylamine (TOA) to aid in Cs stripping, all in Isopar L diluent. This formulation has favorable extraction efficiency for Cs and Sr from acidic solution, and was investigated here for ?-radiation stability. When FPEX was irradiated in contact with aqueous nitric acid, extraction efficiency decreased only slightly when irradiated to absorbed doses as high as 200 kGy. The color of the organic phase changed to a deep yellow-orange, and several new peaks related to radiolysis of the Cs-7SB modifier were detected by GC-ECD analysis. This had little effect on solvent extraction distribution ratios. Possible reasons for this unexpected robustness under conditions of high radiation and acidity are discussed.},
doi = {10.1080/07366290701512477},
journal = {Solvent Extraction and Ion Exchange},
issn = {0736-6299},
number = 5,
volume = 25,
place = {United States},
year = {2007},
month = {9}
}