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Early-1990 status of performance assessment for the Waste Isolation Pilot Plant disposal system

Abstract

This paper summarizes the early-1990 status of the performance-assessment work being done to evaluate compliance of the Waste Isolation Pilot Plant with the U.S. Environmental Protection Agency regulation 40 CFR Part 191, Subpart B. This regulation sets environmental standards for radioactive waste disposal (Environmental Radiation Protection Standards for Management and Disposal of Spent Nuclear Fuel, High-Level and Transuranic Radioactive Wastes). As required by Subpart B, evaluations of compliance will include probabilistic numerical simulations of repository performance and qualitative judgments. Compliance appears uncertain only in the event of human intrusion into the repository after decommissioning. Issues affecting compliance following intrusion include properties of the plugs used to seal the intruding borehole, permeability and porosity of the waste, and possible pressurization of the repository by gas generated from the organic decomposition and corrosion of the waste and containers. Research is in progress to determine the probability of intrusion and to quantify parameter uncertainties needed to include these factors in simulations of repository performance. The Department of Energy (DOE) is following two strategies to assure compliance. First, passive marker systems will be designed and implemented to reduce the likelihood of intrusion and increase the likelihood that intruders will properly reseal the repository. Second,  More>>
Authors:
Bertram-Howery, S G; [1]  Swift, P N [2] 
  1. Sandia National Laboratories, Albuquerque, NM (United States)
  2. Tech Reps Inc., Albuquerque, NM (United States)
Publication Date:
Jul 15, 1991
Product Type:
Technical Report
Report Number:
SAND-90-2095; INIS-XA-N-364
Resource Relation:
Other Information: 10 refs, 3 figs
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; COMPLIANCE; COMPUTERIZED SIMULATION; CORROSION; DECOMMISSIONING; DECOMPOSITION; HUMAN INTRUSION; PERFORMANCE; PERMEABILITY; POROSITY; PROBABILISTIC ESTIMATION; RADIATION PROTECTION; RADIOACTIVE WASTE DISPOSAL; RADIOACTIVE WASTES; REGULATIONS; SPENT FUELS; STANDARDS; TESTING; US EPA; WIPP
OSTI ID:
20780131
Research Organizations:
Sandia National Labs., Albuquerque, NM (United States)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: Contract DE-AC04-76DP00789; TRN: XA04N3019084628
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
28 pages
Announcement Date:
Nov 04, 2006

Citation Formats

Bertram-Howery, S G, and Swift, P N. Early-1990 status of performance assessment for the Waste Isolation Pilot Plant disposal system. IAEA: N. p., 1991. Web.
Bertram-Howery, S G, & Swift, P N. Early-1990 status of performance assessment for the Waste Isolation Pilot Plant disposal system. IAEA.
Bertram-Howery, S G, and Swift, P N. 1991. "Early-1990 status of performance assessment for the Waste Isolation Pilot Plant disposal system." IAEA.
@misc{etde_20780131,
title = {Early-1990 status of performance assessment for the Waste Isolation Pilot Plant disposal system}
author = {Bertram-Howery, S G, and Swift, P N}
abstractNote = {This paper summarizes the early-1990 status of the performance-assessment work being done to evaluate compliance of the Waste Isolation Pilot Plant with the U.S. Environmental Protection Agency regulation 40 CFR Part 191, Subpart B. This regulation sets environmental standards for radioactive waste disposal (Environmental Radiation Protection Standards for Management and Disposal of Spent Nuclear Fuel, High-Level and Transuranic Radioactive Wastes). As required by Subpart B, evaluations of compliance will include probabilistic numerical simulations of repository performance and qualitative judgments. Compliance appears uncertain only in the event of human intrusion into the repository after decommissioning. Issues affecting compliance following intrusion include properties of the plugs used to seal the intruding borehole, permeability and porosity of the waste, and possible pressurization of the repository by gas generated from the organic decomposition and corrosion of the waste and containers. Research is in progress to determine the probability of intrusion and to quantify parameter uncertainties needed to include these factors in simulations of repository performance. The Department of Energy (DOE) is following two strategies to assure compliance. First, passive marker systems will be designed and implemented to reduce the likelihood of intrusion and increase the likelihood that intruders will properly reseal the repository. Second, modifications to the form of the waste and the design of the repository to achieve acceptable performance if the intruding borehole is not adequately sealed will be designed. Goals include reductions in gas generation and waste permeability and porosity. Numerous modifications are technically possible. Work in progress will evaluate proposed modifications and recommend the most promising for further testing. The DOE is confident that compliance with Subpart B of 40 CFR 191 can be established using a combination of the two strategies. Hypothetical simulations of repository performance indicate that effective implementation of either strategy alone could keep probabilistic cumulative radionuclide releases at acceptable levels. Successful implementation of both is anticipated. (author)}
place = {IAEA}
year = {1991}
month = {Jul}
}