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Title: Deep Borehole Disposal Safety Case

Abstract

The safety case for deep borehole disposal of nuclear wastes contains a safety strategy, an assessment basis, and a safety assessment. The safety strategy includes strategies for management, siting and design, and assessment. The assessment basis considers site selection, pre-closure, and post-closure, which includes waste and engineered barriers, the geosphere/natural barriers, and the biosphere and surface environment. The safety assessment entails a pre-closure safety analysis, a post-closure performance assessment, and confidence enhancement analyses. This work outlines the assessment basis and safety assessment aspects of a deep borehole disposal safety case. The safety case presented here is specific to deep borehole disposal of Cs and Sr capsules, but is generally applicable to other waste forms, such as spent nuclear fuel. The safety assessments for pre-closure and post-closure are briefly summarized from other sources; key issues for confidence enhancement are described in greater detail. These confidence enhancement analyses require building the technical basis for geologically old, reducing, highly saline brines at the depth of waste emplacement, and using reactive-transport codes to predict their movement in post-closure. The development and emplacement of borehole seals above the waste emplacement zone is also important to confidence enhancement.

Authors:
 [1];  [1];  [1];  [1];  [1]; ORCiD logo [2];  [2];  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Sheffield (United Kingdom)
  3. Marriott Drilling Group, Chesterfield (United Kingdom)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1526232
Report Number(s):
SAND-2019-4378J
Journal ID: ISSN 1996-1073; ENERGA; 674823
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Energies (Basel)
Additional Journal Information:
Journal Name: Energies (Basel); Journal Volume: 12; Journal Issue: 11; Journal ID: ISSN 1996-1073
Publisher:
MDPI AG
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; boreholes; safety case; performance assessment

Citation Formats

Freeze, Geoff A., Stein, Emily, Brady, Patrick V., Lopez, Carlos, Sassani, David, Travis, Karl, Gibb, Fergus, and Beswick, John. Deep Borehole Disposal Safety Case. United States: N. p., 2019. Web. doi:10.3390/en12112141.
Freeze, Geoff A., Stein, Emily, Brady, Patrick V., Lopez, Carlos, Sassani, David, Travis, Karl, Gibb, Fergus, & Beswick, John. Deep Borehole Disposal Safety Case. United States. doi:10.3390/en12112141.
Freeze, Geoff A., Stein, Emily, Brady, Patrick V., Lopez, Carlos, Sassani, David, Travis, Karl, Gibb, Fergus, and Beswick, John. Tue . "Deep Borehole Disposal Safety Case". United States. doi:10.3390/en12112141. https://www.osti.gov/servlets/purl/1526232.
@article{osti_1526232,
title = {Deep Borehole Disposal Safety Case},
author = {Freeze, Geoff A. and Stein, Emily and Brady, Patrick V. and Lopez, Carlos and Sassani, David and Travis, Karl and Gibb, Fergus and Beswick, John},
abstractNote = {The safety case for deep borehole disposal of nuclear wastes contains a safety strategy, an assessment basis, and a safety assessment. The safety strategy includes strategies for management, siting and design, and assessment. The assessment basis considers site selection, pre-closure, and post-closure, which includes waste and engineered barriers, the geosphere/natural barriers, and the biosphere and surface environment. The safety assessment entails a pre-closure safety analysis, a post-closure performance assessment, and confidence enhancement analyses. This work outlines the assessment basis and safety assessment aspects of a deep borehole disposal safety case. The safety case presented here is specific to deep borehole disposal of Cs and Sr capsules, but is generally applicable to other waste forms, such as spent nuclear fuel. The safety assessments for pre-closure and post-closure are briefly summarized from other sources; key issues for confidence enhancement are described in greater detail. These confidence enhancement analyses require building the technical basis for geologically old, reducing, highly saline brines at the depth of waste emplacement, and using reactive-transport codes to predict their movement in post-closure. The development and emplacement of borehole seals above the waste emplacement zone is also important to confidence enhancement.},
doi = {10.3390/en12112141},
journal = {Energies (Basel)},
number = 11,
volume = 12,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

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