WIPP Compliance Certification Application calculations parameters. Part 1: Parameter development

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The Waste Isolation Pilot Plant (WIPP) in southeast New Mexico has been studied as a transuranic waste repository for the past 23 years. During this time, an extensive site characterization, design, construction, and experimental program was completed, which provided in-depth understanding of the dominant processes that are most likely to influence the containment of radionuclides for 10,000 years. Nearly 1,500 parameters were developed using information gathered from this program; the parameters were input to numerical models for WIPP Compliance Certification Application (CCA) Performance Assessment (PA) calculations. The CCA probabilistic codes frequently require input values that define a statistical distribution for ... continued below

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8 p.

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Howarth, S.M. November 14, 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

The Waste Isolation Pilot Plant (WIPP) in southeast New Mexico has been studied as a transuranic waste repository for the past 23 years. During this time, an extensive site characterization, design, construction, and experimental program was completed, which provided in-depth understanding of the dominant processes that are most likely to influence the containment of radionuclides for 10,000 years. Nearly 1,500 parameters were developed using information gathered from this program; the parameters were input to numerical models for WIPP Compliance Certification Application (CCA) Performance Assessment (PA) calculations. The CCA probabilistic codes frequently require input values that define a statistical distribution for each parameter. Developing parameter distributions begins with the assignment of an appropriate distribution type, which is dependent on the type, magnitude, and volume of data or information available. The development of the parameter distribution values may require interpretation or statistical analysis of raw data, combining raw data with literature values, scaling of lab or field data to fit code grid mesh sizes, or other transformation. Parameter development and documentation of the development process were very complicated, especially for those parameters based on empirical data; they required the integration of information from Sandia National Laboratories (SNL) code sponsors, parameter task leaders (PTLs), performance assessment analysts (PAAs), and experimental principal investigators (PIs). This paper, Part 1 of two parts, contains a discussion of the parameter development process, roles and responsibilities, and lessons learned. Part 2 will discuss parameter documentation, traceability and retrievability, and lessons learned from related audits and reviews.

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8 p.

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INIS; OSTI as DE98001310

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  • 1998 international high-level radioactive waste management conference, Las Vegas, NV (United States), 11-14 May 1998

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  • Other: DE98001310
  • Report No.: SAND--97-2764C
  • Report No.: CONF-980516--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 650096
  • Archival Resource Key: ark:/67531/metadc707606

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  • November 14, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • June 14, 2016, 7:16 p.m.

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Howarth, S.M. WIPP Compliance Certification Application calculations parameters. Part 1: Parameter development, article, November 14, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707606/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.