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Title: Deep Borehole Disposal Conceptual Design ? Preclosure Safety Analysis.

Abstract

Abstract not provided.

Authors:
; ;  [1]
  1. (ORNL)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1367326
Report Number(s):
SAND2017-5409PE
653500
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the SFWST Working Group held May 23-25, 2017 in Las Vegas, NV.
Country of Publication:
United States
Language:
English

Citation Formats

Hardin, Ernest, Su, Jiann-Cherng, and Peretz, Fred. Deep Borehole Disposal Conceptual Design ? Preclosure Safety Analysis.. United States: N. p., 2017. Web.
Hardin, Ernest, Su, Jiann-Cherng, & Peretz, Fred. Deep Borehole Disposal Conceptual Design ? Preclosure Safety Analysis.. United States.
Hardin, Ernest, Su, Jiann-Cherng, and Peretz, Fred. Mon . "Deep Borehole Disposal Conceptual Design ? Preclosure Safety Analysis.". United States. doi:. https://www.osti.gov/servlets/purl/1367326.
@article{osti_1367326,
title = {Deep Borehole Disposal Conceptual Design ? Preclosure Safety Analysis.},
author = {Hardin, Ernest and Su, Jiann-Cherng and Peretz, Fred},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}

Conference:
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  • A preliminary probabilistic risk assessment was performed for the prospective Yucca Mountain conceptual design repository. A new methodology to quantify radioactive source terms was developed and applied in the analysis. The study identified 42 event trees comprising 278 accident scenarios. The maximum offsite dose evaluated in this study is about 1000 mrem. For the majority of the accident scenarios, either the offsite dose is less than 100 mrem or the probability of occurrence is less than 1 {times} 10{sup {minus}9}/yr. Only 11 accident scenarios with a dose larger than 100 mrem and an associated probability greater than 1 {times} 10{supmore » {minus}9}/yr were identified. A more detailed follow-on analysis for seismic events of various severity was also performed, and similar results were obtained. Therefore, based on the results of this analysis, no significant risk to the general public was identified during the preclosure period for the conceptual repository design. 13 refs., 4 figs., 2 tabs.« less
  • This paper describes a preliminary probabilistic risk assessment performed for the prospective Yucca Mountain conceptual design repository. A new methodology to quantify radioactive source terms is discussed. A flow-on analysis for seismic events of various severity is presented.
  • Abstract not provided.
  • This report presents conceptual design information for a system to handle and emplace packages containing radioactive waste, in boreholes 16,400 ft deep or possibly deeper. Its intended use is for a design selection study that compares the costs and risks associated with two emplacement methods: drill-string and wireline emplacement. The deep borehole disposal (DBD) concept calls for siting a borehole (or array of boreholes) that penetrate crystalline basement rock to a depth below surface of about 16,400 ft (5 km). Waste packages would be emplaced in the lower 6,560 ft (2 km) of the borehole, with sealing of appropriate portionsmore » of the upper 9,840 ft (3 km). A deep borehole field test (DBFT) is planned to test and refine the DBD concept. The DBFT is a scientific and engineering experiment, conducted at full-scale, in-situ, without radioactive waste. Waste handling operations are conceptualized to begin with the onsite receipt of a purpose-built Type B shipping cask, that contains a waste package. Emplacement operations begin when the cask is upended over the borehole, locked to a receiving flange or collar. The scope of emplacement includes activities to lower waste packages to total depth, and to retrieve them back to the surface when necessary for any reason. This report describes three concepts for the handling and emplacement of the waste packages: 1) a concept proposed by Woodward-Clyde Consultants in 1983; 2) an updated version of the 1983 concept developed for the DBFT; and 3) a new concept in which individual waste packages would be lowered to depth using a wireline. The systems described here could be adapted to different waste forms, but for design of waste packaging, handling, and emplacement systems the reference waste forms are DOE-owned high- level waste including Cs/Sr capsules and bulk granular HLW from fuel processing. Handling and Emplacement Options for Deep Borehole Disposal Conceptual Design July 23, 2015 iv ACKNOWLEDGEMENTS This report has benefited greatly from review principally by Steve Pye, and also by Paul Eslinger, Dave Sevougian and Jiann Su.« less