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Title: Automated analysis of radionuclides in nuclear waste: Rapid determination of {sup 90}Sr by sequential injection analysis

Abstract

A rapid, automated microanalytical procedure for the determination of {sup 90}Sr in aged nuclear waste has been developed. It is based on a sequential injection analysis (SIA) system which rapidly separates {sup 90}Sr from {sup 90}Y, {sup 137}Cs, and other radionuclides. The isolated {sup 90}Sr is then detected on-line with a flow-through liquid scintillation counter. The separation is achieved using a sorbent extraction minicolumn containing a resin (EIChrom, Sr-Spec) that selectively binds {sup 90}Sr as a crown ether complex under acidic conditions. The {sup 90}Sr is eluted with water, mixed with liquid scintillation cocktail, and detected in the flow cell of the counter. Sample {sup 90}Sr activity can be quantified from peak areas, giving linear calibration curves. The instrument can also be operated in a stopped-flow mode for longer counting times. Analyses of aged nuclear waste samples from the Hanford site by the SIA method and a manual method were in excellent agreement: correlation coefficient R = 0.994. Sample analysis by the SIA method is complete in less than 40 min. The advantages of the new {sup 90}Sr analyzer include faster analysis, greater precision, reduced labor costs, and reduced secondary waste. Worker safety is improved because solution handling operations aremore » fully automated and contained. 46 refs., 6 figs., 1 tab.« less

Authors:
; ;  [1]; ;  [2]
  1. Pacific Northwest National Lab., Richland, WA (United States)
  2. Univ. of Washington, Seattle, WA (United States)
Publication Date:
OSTI Identifier:
199408
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Journal Article
Journal Name:
Analytical Chemistry (Washington)
Additional Journal Information:
Journal Volume: 68; Journal Issue: 2; Other Information: PBD: 15 Jan 1996
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 40 CHEMISTRY; RADIOISOTOPES; MICROANALYSIS; SEPARATION PROCESSES; STRONTIUM 90; SCINTILLATION COUNTING; RADIOACTIVE WASTES; QUANTITATIVE CHEMICAL ANALYSIS; LIQUID SCINTILLATION DETECTORS; USES; MEASURING INSTRUMENTS; SCINTILLATION COUNTERS; AUTOMATION

Citation Formats

Grate, J W, Strebin, R, Janata, J, Egorov, O, and Ruzicka, J. Automated analysis of radionuclides in nuclear waste: Rapid determination of {sup 90}Sr by sequential injection analysis. United States: N. p., 1996. Web. doi:10.1021/ac950561m.
Grate, J W, Strebin, R, Janata, J, Egorov, O, & Ruzicka, J. Automated analysis of radionuclides in nuclear waste: Rapid determination of {sup 90}Sr by sequential injection analysis. United States. doi:10.1021/ac950561m.
Grate, J W, Strebin, R, Janata, J, Egorov, O, and Ruzicka, J. Mon . "Automated analysis of radionuclides in nuclear waste: Rapid determination of {sup 90}Sr by sequential injection analysis". United States. doi:10.1021/ac950561m.
@article{osti_199408,
title = {Automated analysis of radionuclides in nuclear waste: Rapid determination of {sup 90}Sr by sequential injection analysis},
author = {Grate, J W and Strebin, R and Janata, J and Egorov, O and Ruzicka, J},
abstractNote = {A rapid, automated microanalytical procedure for the determination of {sup 90}Sr in aged nuclear waste has been developed. It is based on a sequential injection analysis (SIA) system which rapidly separates {sup 90}Sr from {sup 90}Y, {sup 137}Cs, and other radionuclides. The isolated {sup 90}Sr is then detected on-line with a flow-through liquid scintillation counter. The separation is achieved using a sorbent extraction minicolumn containing a resin (EIChrom, Sr-Spec) that selectively binds {sup 90}Sr as a crown ether complex under acidic conditions. The {sup 90}Sr is eluted with water, mixed with liquid scintillation cocktail, and detected in the flow cell of the counter. Sample {sup 90}Sr activity can be quantified from peak areas, giving linear calibration curves. The instrument can also be operated in a stopped-flow mode for longer counting times. Analyses of aged nuclear waste samples from the Hanford site by the SIA method and a manual method were in excellent agreement: correlation coefficient R = 0.994. Sample analysis by the SIA method is complete in less than 40 min. The advantages of the new {sup 90}Sr analyzer include faster analysis, greater precision, reduced labor costs, and reduced secondary waste. Worker safety is improved because solution handling operations are fully automated and contained. 46 refs., 6 figs., 1 tab.},
doi = {10.1021/ac950561m},
journal = {Analytical Chemistry (Washington)},
number = 2,
volume = 68,
place = {United States},
year = {1996},
month = {1}
}