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Title: Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant

Abstract

The Waste Isolation Pilot Plant was licensed for disposal of transuranic wastes generated by the US Department of Energy. The facility consists of a repository mined in a bedded salt formation, approximately 650 m below the surface. Regulations promulgated by the US Environmental Protection Agency require that performance assessment calculations for the repository include the possibility that an exploratory drilling operation could penetrate the waste disposal areas at some time in the future. Release of contaminated solids could reach the surface during a drilling intrusion. One of the mechanisms for release, known as spallings, can occur if gas pressures in the repository exceed the hydrostatic pressure of a column of drilling mud. Calculation of solids releases for spallings depends critically on the conceptual models for the waste, for the spallings process, and assumptions regarding driller parameters and practices. The paper presents a review of the evolution of these models during regulatory review of the Compliance Certification Application for the repository. A summary and perspectives on the implementation of conservative assumptions in model development are also provided.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755592
Report Number(s):
SAND2000-1206J
TRN: US0101475
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Reliability Engineering and System Safety (Special Journal Issue)
Additional Journal Information:
Other Information: Submitted to Reliability Engineering and System Safety (Special Journal Issue); Supercedes report DE00755592; PBD: 22 May 2000
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; WELL DRILLING; DRILLING FLUIDS; PERFORMANCE; RADIOACTIVE WASTE DISPOSAL; WIPP; HUMAN INTRUSION; MATHEMATICAL MODELS; RESERVOIR PRESSURE

Citation Formats

Knowles, M.K, Hansen, F.D., Thompson, T.W., Schatz, J.F., and Gross, M. Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant. United States: N. p., 2000. Web. doi:10.1016/S0951-8320(00)00037-5.
Knowles, M.K, Hansen, F.D., Thompson, T.W., Schatz, J.F., & Gross, M. Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant. United States. doi:10.1016/S0951-8320(00)00037-5.
Knowles, M.K, Hansen, F.D., Thompson, T.W., Schatz, J.F., and Gross, M. Mon . "Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant". United States. doi:10.1016/S0951-8320(00)00037-5. https://www.osti.gov/servlets/purl/755592.
@article{osti_755592,
title = {Review and perspectives on spallings release models in the 1996 performance assessment for the Waste Isolation Pilot Plant},
author = {Knowles, M.K and Hansen, F.D. and Thompson, T.W. and Schatz, J.F. and Gross, M.},
abstractNote = {The Waste Isolation Pilot Plant was licensed for disposal of transuranic wastes generated by the US Department of Energy. The facility consists of a repository mined in a bedded salt formation, approximately 650 m below the surface. Regulations promulgated by the US Environmental Protection Agency require that performance assessment calculations for the repository include the possibility that an exploratory drilling operation could penetrate the waste disposal areas at some time in the future. Release of contaminated solids could reach the surface during a drilling intrusion. One of the mechanisms for release, known as spallings, can occur if gas pressures in the repository exceed the hydrostatic pressure of a column of drilling mud. Calculation of solids releases for spallings depends critically on the conceptual models for the waste, for the spallings process, and assumptions regarding driller parameters and practices. The paper presents a review of the evolution of these models during regulatory review of the Compliance Certification Application for the repository. A summary and perspectives on the implementation of conservative assumptions in model development are also provided.},
doi = {10.1016/S0951-8320(00)00037-5},
journal = {Reliability Engineering and System Safety (Special Journal Issue)},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}