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Title: Radiation defects and energy storage in natural polycrystalline rock salt. Results of an in-situ test in the Permian rock salt of the Asse

Abstract

Radiation damage development and the corresponding energy storage in pure undeformed single crystals have frequently been studied in laboratory experiments, however little is known of irradiation experiments on natural rock salt (polycrystalline, deformed and impure) under geological conditions. The relevance of these parameters to the defect formation was revealed by a joint United States/Federal Republic of Germany in-situ test in the Asse Mine. Natural rock salt was heated and irradiated using Co-60 sources. Calculations of the amount of halite expected to be decomposed by radiolysis during the experiment were performed using the 1985 version of the Jain-Lidiard model. Qualitative agreement between theory and analyses was found for all the performed analyses. Quantitative and qualitative deviations of the natural samples behaviour from that of single undeformed crystals were observed and attributed to the influence of sulfatic admixtures, polycrystallinity and strain on radiation damage development and anneal. Special chemical methods, such as iodometric titration and uv-visible spectroscopy were applied in order to measure the hypochlorite ion, which forms in irradiated salt. Composite samples located closet to the Co-60 source averaged 0,4 micromoles neutral chlorine atoms per gram salt, a factor of two more than from other positions. Uv-vis analyses revealed more thanmore » a factor of ten greater neutral chlorine concentrations in coloured halite. Similarly, optical absorption measurements indicated a factor of ten difference in sodium metal colloid concentrations.« less

Authors:
;  [1]; ;  [2];  [3]
  1. Institut fuer Tieflagerung, Braunschweig (Germany)
  2. Netherlands Energy Research Foundation, Petten (Netherlands)
  3. Pacific Northwest Lab., Richland, WA (United States)
Publication Date:
OSTI Identifier:
47869
Report Number(s):
CONF-931108-Vol.333
TRN: 95:011376
Resource Type:
Conference
Resource Relation:
Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 29 Nov - 3 Dec 1993; Other Information: PBD: 1994; Related Information: Is Part Of Scientific basis for nuclear waste management XVII; Barkatt, A. [ed.] [Catholic Univ. of America, Washington, DC (United States)]; Van Konynenburg, R.A. [ed.] [Lawrence Livermore National Lab., CA (United States)]; PB: 964 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HALITE; RADIATION EFFECTS; POLYCRYSTALS; RADIOLYSIS; SALT DEPOSITS; MONOCRYSTALS; COBALT 60; FEDERAL REPUBLIC OF GERMANY; USA; PERMIAN PERIOD; IODOMETRY; SPECTROSCOPY

Citation Formats

Gies, H, Rothfuchs, T, Celma, A G, Haas, J B.M. de, and Pederson, L. Radiation defects and energy storage in natural polycrystalline rock salt. Results of an in-situ test in the Permian rock salt of the Asse. United States: N. p., 1994. Web.
Gies, H, Rothfuchs, T, Celma, A G, Haas, J B.M. de, & Pederson, L. Radiation defects and energy storage in natural polycrystalline rock salt. Results of an in-situ test in the Permian rock salt of the Asse. United States.
Gies, H, Rothfuchs, T, Celma, A G, Haas, J B.M. de, and Pederson, L. 1994. "Radiation defects and energy storage in natural polycrystalline rock salt. Results of an in-situ test in the Permian rock salt of the Asse". United States.
@article{osti_47869,
title = {Radiation defects and energy storage in natural polycrystalline rock salt. Results of an in-situ test in the Permian rock salt of the Asse},
author = {Gies, H and Rothfuchs, T and Celma, A G and Haas, J B.M. de and Pederson, L},
abstractNote = {Radiation damage development and the corresponding energy storage in pure undeformed single crystals have frequently been studied in laboratory experiments, however little is known of irradiation experiments on natural rock salt (polycrystalline, deformed and impure) under geological conditions. The relevance of these parameters to the defect formation was revealed by a joint United States/Federal Republic of Germany in-situ test in the Asse Mine. Natural rock salt was heated and irradiated using Co-60 sources. Calculations of the amount of halite expected to be decomposed by radiolysis during the experiment were performed using the 1985 version of the Jain-Lidiard model. Qualitative agreement between theory and analyses was found for all the performed analyses. Quantitative and qualitative deviations of the natural samples behaviour from that of single undeformed crystals were observed and attributed to the influence of sulfatic admixtures, polycrystallinity and strain on radiation damage development and anneal. Special chemical methods, such as iodometric titration and uv-visible spectroscopy were applied in order to measure the hypochlorite ion, which forms in irradiated salt. Composite samples located closet to the Co-60 source averaged 0,4 micromoles neutral chlorine atoms per gram salt, a factor of two more than from other positions. Uv-vis analyses revealed more than a factor of ten greater neutral chlorine concentrations in coloured halite. Similarly, optical absorption measurements indicated a factor of ten difference in sodium metal colloid concentrations.},
doi = {},
url = {https://www.osti.gov/biblio/47869}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}

Conference:
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