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Title: Effect of a random variation of rock salt creep on calculations of storage room closure for the WIPP project

Abstract

Heterogeneity is characteristic of many geologic media. In particular, naturally occurring rock salt in southeastern New Mexico shows a wide variation of secondary creep rates between tested samples. It is important to know how this scatter in properties affects room closure predictions. This report presents the results of a study designed to quantify this effect for a particular isothermal storage room model. A series of calculations of room closure are made with both homogeneous and randomly distributioned creep properties. Calculations involving random property variations were divided into two sets: those in which variations occurred only in the vertical direction, and those in which both horizontal and vertical variations were present. The introduction of randomly distributed creep properties is shown to yield room closure predictions which, when averaged among several calculations, are reduced from the single prediction of an analogous homogeneous calculation. The analysis finds an average creep property value which could be used to achieve the same closure result as the average of several random calculations. Some statements concerning confidence intervals on room closure predictions are made.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
6614795
Report Number(s):
SAND-82-0024
ON: DE83005814
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products. Original copies available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE DISPOSAL; CALCULATION METHODS; SALT DEPOSITS; SALT CAVERNS; CREEP; HIGH-LEVEL RADIOACTIVE WASTES; NEW MEXICO; RADIOACTIVE WASTE FACILITIES; VARIATIONS; CAVITIES; FEDERAL REGION VI; GEOLOGIC DEPOSITS; MANAGEMENT; MATERIALS; MECHANICAL PROPERTIES; NORTH AMERICA; NUCLEAR FACILITIES; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; USA; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES; 052002* - Nuclear Fuels- Waste Disposal & Storage

Citation Formats

Branstetter, L J, Krieg, R D, and Stone, C M. Effect of a random variation of rock salt creep on calculations of storage room closure for the WIPP project. United States: N. p., 1982. Web.
Branstetter, L J, Krieg, R D, & Stone, C M. Effect of a random variation of rock salt creep on calculations of storage room closure for the WIPP project. United States.
Branstetter, L J, Krieg, R D, and Stone, C M. 1982. "Effect of a random variation of rock salt creep on calculations of storage room closure for the WIPP project". United States.
@article{osti_6614795,
title = {Effect of a random variation of rock salt creep on calculations of storage room closure for the WIPP project},
author = {Branstetter, L J and Krieg, R D and Stone, C M},
abstractNote = {Heterogeneity is characteristic of many geologic media. In particular, naturally occurring rock salt in southeastern New Mexico shows a wide variation of secondary creep rates between tested samples. It is important to know how this scatter in properties affects room closure predictions. This report presents the results of a study designed to quantify this effect for a particular isothermal storage room model. A series of calculations of room closure are made with both homogeneous and randomly distributioned creep properties. Calculations involving random property variations were divided into two sets: those in which variations occurred only in the vertical direction, and those in which both horizontal and vertical variations were present. The introduction of randomly distributed creep properties is shown to yield room closure predictions which, when averaged among several calculations, are reduced from the single prediction of an analogous homogeneous calculation. The analysis finds an average creep property value which could be used to achieve the same closure result as the average of several random calculations. Some statements concerning confidence intervals on room closure predictions are made.},
doi = {},
url = {https://www.osti.gov/biblio/6614795}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1982},
month = {Fri Oct 01 00:00:00 EDT 1982}
}

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