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Title: Radiation Chemical Effects in the Near Field of a Final Disposal Site - I: Radiolytic Products Formed in Concentrated NaCl Solutions

Abstract

The yields of the different radiolytic products formed by gamma radiolysis from NaCl brines at ambient temperature and dose rates between 0.1 and 1 kGy/h were determined. At a chloride concentration of 5.3 mol/l, H{sub 2}, O{sub 2}, and ClO{sub 3}{sup -} were formed proportional to the dose and independent from the dose rate with G values of 0.6, 0.16, and 0.074, respectively. At a concentration of 2 mol/l, the chlorate yield dropped to a value close to zero, and the gas composition became stoichiometric. At pH 12 and in the presence of heavy metal ions, the yield of oxygen increased at the expense of chlorate. The concentrations of hypochlorite and chlorite were usually in the micromole per litre range. In pressurized solutions of 5.3 mol/l Cl{sup -} where all radiolytic gases were kept dissolved, equilibrium concentrations of radiolytic products were almost reached at a dose of {approx}1 MGy. The partial pressure of radiolytic gases was {approx}35 bars, and the chlorate concentration was {approx}170 {mu}mol/l.

Authors:
;  [1]
  1. Forschungszentrum Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
20822125
Resource Type:
Journal Article
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 129; Journal Issue: 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0029-5450
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; AMBIENT TEMPERATURE; BRINES; CHLORATES; CHLORINE IONS; DOSE RATES; DOSES; GASES; HEAVY METALS; HYDROGEN; OXYGEN; PARTIAL PRESSURE; PH VALUE; RADIOACTIVE EFFLUENTS; RADIOACTIVE WASTE DISPOSAL; RADIOLYSIS; SODIUM CHLORIDES; SOLUTIONS

Citation Formats

Kelm, M, and Bohnert, E. Radiation Chemical Effects in the Near Field of a Final Disposal Site - I: Radiolytic Products Formed in Concentrated NaCl Solutions. United States: N. p., 2000. Web.
Kelm, M, & Bohnert, E. Radiation Chemical Effects in the Near Field of a Final Disposal Site - I: Radiolytic Products Formed in Concentrated NaCl Solutions. United States.
Kelm, M, and Bohnert, E. 2000. "Radiation Chemical Effects in the Near Field of a Final Disposal Site - I: Radiolytic Products Formed in Concentrated NaCl Solutions". United States.
@article{osti_20822125,
title = {Radiation Chemical Effects in the Near Field of a Final Disposal Site - I: Radiolytic Products Formed in Concentrated NaCl Solutions},
author = {Kelm, M and Bohnert, E},
abstractNote = {The yields of the different radiolytic products formed by gamma radiolysis from NaCl brines at ambient temperature and dose rates between 0.1 and 1 kGy/h were determined. At a chloride concentration of 5.3 mol/l, H{sub 2}, O{sub 2}, and ClO{sub 3}{sup -} were formed proportional to the dose and independent from the dose rate with G values of 0.6, 0.16, and 0.074, respectively. At a concentration of 2 mol/l, the chlorate yield dropped to a value close to zero, and the gas composition became stoichiometric. At pH 12 and in the presence of heavy metal ions, the yield of oxygen increased at the expense of chlorate. The concentrations of hypochlorite and chlorite were usually in the micromole per litre range. In pressurized solutions of 5.3 mol/l Cl{sup -} where all radiolytic gases were kept dissolved, equilibrium concentrations of radiolytic products were almost reached at a dose of {approx}1 MGy. The partial pressure of radiolytic gases was {approx}35 bars, and the chlorate concentration was {approx}170 {mu}mol/l.},
doi = {},
url = {https://www.osti.gov/biblio/20822125}, journal = {Nuclear Technology},
issn = {0029-5450},
number = 1,
volume = 129,
place = {United States},
year = {Sat Jan 15 00:00:00 EST 2000},
month = {Sat Jan 15 00:00:00 EST 2000}
}