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Title: Leaching of /sup 14/C and /sup 36/Cl from Hanford reactor graphite

Abstract

The leach rates of /sup 14C/ and /sup 36Cl/ were measured on solid cylindrical samples of graphite prepared from a bar retrieved from one of the surplus Hanford production reactors. Static leach tests were conducted in deionized water and Hanford ground water at temperatures of 20/degree/C to 90/degree/C for 8 weeks. The graphite samples were completely submerged in the leachant, and the entire volume of leachant was changed and analyzed weekly. The leach rates of both /sup 14C/ and /sup 36Cl/ decreased with time and appeared to approach steady-state values that were independent of temperature in the case of /sup 36Cl/ but decreased with temperature in the case of /sup 14C/. Both radionuclides leached more slowly in Hanford ground water. The data are compared with previously measured and estimated leach rates. Implications of the data regarding possible rate-limiting mechanisms are also discussed. 4 refs., 18 figs., 4 tabs.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
OSTI Identifier:
6655750
Report Number(s):
PNL-6769
ON: DE89004979
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; WASTE FORMS; LEACHING; CARBON 14; CHLORINE 36; COMPILED DATA; GRAPHITE; GROUND WATER; HANFORD PRODUCTION REACTORS; SURPLUS NUCLEAR FACILITIES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON; CARBON ISOTOPES; CHLORINE ISOTOPES; DATA; DISSOLUTION; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTAL MINERALS; ELEMENTS; EVEN-EVEN NUCLEI; HYDROGEN COMPOUNDS; INFORMATION; ISOTOPES; LIGHT NUCLEI; MINERALS; NONMETALS; NUCLEAR FACILITIES; NUCLEI; NUMERICAL DATA; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; PLUTONIUM PRODUCTION REACTORS; PRODUCTION REACTORS; RADIOISOTOPES; REACTORS; SEPARATION PROCESSES; WATER; YEARS LIVING RADIOISOTOPES; 052002* - Nuclear Fuels- Waste Disposal & Storage; 053000 - Nuclear Fuels- Environmental Aspects

Citation Formats

Gray, W J, and Morgan, W C. Leaching of /sup 14/C and /sup 36/Cl from Hanford reactor graphite. United States: N. p., 1988. Web. doi:10.2172/6655750.
Gray, W J, & Morgan, W C. Leaching of /sup 14/C and /sup 36/Cl from Hanford reactor graphite. United States. https://doi.org/10.2172/6655750
Gray, W J, and Morgan, W C. 1988. "Leaching of /sup 14/C and /sup 36/Cl from Hanford reactor graphite". United States. https://doi.org/10.2172/6655750. https://www.osti.gov/servlets/purl/6655750.
@article{osti_6655750,
title = {Leaching of /sup 14/C and /sup 36/Cl from Hanford reactor graphite},
author = {Gray, W J and Morgan, W C},
abstractNote = {The leach rates of /sup 14C/ and /sup 36Cl/ were measured on solid cylindrical samples of graphite prepared from a bar retrieved from one of the surplus Hanford production reactors. Static leach tests were conducted in deionized water and Hanford ground water at temperatures of 20/degree/C to 90/degree/C for 8 weeks. The graphite samples were completely submerged in the leachant, and the entire volume of leachant was changed and analyzed weekly. The leach rates of both /sup 14C/ and /sup 36Cl/ decreased with time and appeared to approach steady-state values that were independent of temperature in the case of /sup 36Cl/ but decreased with temperature in the case of /sup 14C/. Both radionuclides leached more slowly in Hanford ground water. The data are compared with previously measured and estimated leach rates. Implications of the data regarding possible rate-limiting mechanisms are also discussed. 4 refs., 18 figs., 4 tabs.},
doi = {10.2172/6655750},
url = {https://www.osti.gov/biblio/6655750}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 1988},
month = {Thu Dec 01 00:00:00 EST 1988}
}