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Title: Influence of heat flow on drift closure during Climax granite spent-fuel test: measurements and calculations

Abstract

Measurements of drift closure caused by the thermal load have been made routinely during the Spent Fuel Test in Climax granite since about six weeks after emplacement of the fuel. Horizontal and vertical closure was measured with a manually operated tape extensometer at various locations along the lengths of the drifts. Average closures ranged from 0 to 0.6 mm, horizontal and vertical, out to about 2.2 years since the start of the test. At the same time, displacements from the thermal loads were measured with rod extensometers emplaced to measure relative displacements between hole collars and anchor points in holes drilled from two parallel heater drifts. These data are compared with thermo-elastic finite element calculations which utilized measured properties of the Climax granite. The calculations show that more than half of the closures occur between fuel installation and the first closure measurement. The comparisons show that the results track each other, in that where closure followed by dilation is measured, the calculations also show this effect. The agreement is excellent, considering the averaged measured closures remain within 30% of the total calculated drift closures and the extremely small magnitude of the relative displacements (0.5 mm), measured or calculated.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
59259
Report Number(s):
UCRL-87248; CONF-820933-3
ON: DE82021351
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Conference: International conference on radioactive waste management, Winnipeg, Manitoba (Canada), 12-15 Sep 1982; Other Information: DN: Portions of document are illegible; PBD: 8 Sep 1982
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 58 GEOSCIENCES; GRANITES; TEMPERATURE EFFECTS; RADIOACTIVE WASTE STORAGE; CLOSURES; SPENT FUEL STORAGE; UNDERGROUND STORAGE; DEFORMATION; TEMPERATURE MEASUREMENT; EXPERIMENTAL DATA; THEORETICAL DATA; HEAT TRANSFER; EXTENSOMETERS; Yucca Mountain Project

Citation Formats

Butkovich, T R, Yow, Jr, J L, and Montan, D N. Influence of heat flow on drift closure during Climax granite spent-fuel test: measurements and calculations. United States: N. p., 1982. Web. doi:10.2172/59259.
Butkovich, T R, Yow, Jr, J L, & Montan, D N. Influence of heat flow on drift closure during Climax granite spent-fuel test: measurements and calculations. United States. https://doi.org/10.2172/59259
Butkovich, T R, Yow, Jr, J L, and Montan, D N. 1982. "Influence of heat flow on drift closure during Climax granite spent-fuel test: measurements and calculations". United States. https://doi.org/10.2172/59259. https://www.osti.gov/servlets/purl/59259.
@article{osti_59259,
title = {Influence of heat flow on drift closure during Climax granite spent-fuel test: measurements and calculations},
author = {Butkovich, T R and Yow, Jr, J L and Montan, D N},
abstractNote = {Measurements of drift closure caused by the thermal load have been made routinely during the Spent Fuel Test in Climax granite since about six weeks after emplacement of the fuel. Horizontal and vertical closure was measured with a manually operated tape extensometer at various locations along the lengths of the drifts. Average closures ranged from 0 to 0.6 mm, horizontal and vertical, out to about 2.2 years since the start of the test. At the same time, displacements from the thermal loads were measured with rod extensometers emplaced to measure relative displacements between hole collars and anchor points in holes drilled from two parallel heater drifts. These data are compared with thermo-elastic finite element calculations which utilized measured properties of the Climax granite. The calculations show that more than half of the closures occur between fuel installation and the first closure measurement. The comparisons show that the results track each other, in that where closure followed by dilation is measured, the calculations also show this effect. The agreement is excellent, considering the averaged measured closures remain within 30% of the total calculated drift closures and the extremely small magnitude of the relative displacements (0.5 mm), measured or calculated.},
doi = {10.2172/59259},
url = {https://www.osti.gov/biblio/59259}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 08 00:00:00 EDT 1982},
month = {Wed Sep 08 00:00:00 EDT 1982}
}