[논문]MAKING THE CASE FOR SAFE STORAGE OF USED NUCLEAR FUEL FOR EXTENDED PERIODS OF TIME: COMBINING NEAR-TERM EXPERIMENTS AND ANALYSES WITH LONGER-TERM CONFIRMATORY DEMONSTRATIONS

Sorenson, Ken B.; Hanson, Brady

doi:10.5516/net.06.2013.707

MAKING THE CASE FOR SAFE STORAGE OF USED NUCLEAR FUEL FOR EXTENDED PERIODS OF TIME: COMBINING NEAR-TERM EXPERIMENTS AND ANALYSES WITH LONGER-TERM CONFIRMATORY DEMONSTRATIONS 원문보기

Nuclear engineering and technology : an international journal of the Korean Nuclear Society, v.45 no.4, 2013년, pp.421 - 426

Sorenson, Ken B. (Advanced Nuclear Fuel Cycle Technologies Sandia National Laboratories) , Hanson, Brady (Storage & Transportation R&D Manager Pacific Northwest National Laboratory)

Abstract ▼ AI-Helper

The need for extended storage of used nuclear fuel is increasing globally as disposition schedules for used fuel are pushed further into the future. This is creating a situation where dry storage of used fuel may need to be extended beyond normal regulatory licensing periods. While it is generally accepted that used fuel in dry storage will remain in a safe condition, there is little data that demonstrate used fuel performance in dry storage environments for long periods of time. This is especially true for high burnup used fuel. This paper discusses a technical approach that defines a process that develops the technical basis for demonstrating the safety of used fuel over extended periods of time.

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문제 정의

Linking the understanding of hydride effects to performance in long-term storage is essential in order to predict performance under extended storage periods and subsequent transportation. An understanding of how the used fuel cools in these environments and predicting when or if the used fuel drops below the DBTT will drive operational decisions for the management of these materials. A confirmatory storage demonstration will provide the necessary validation to confirm the long term material performance understanding that was developed from the earlier experimental and analytical work.
The result of this work is a comprehensive assessment[4] of the R&D that needs to be conducted to develop the technical bases for extended storage.
This paper will discuss a path forward for development of the technical bases that will address technical gaps that need to be resolved for understanding materials degradation issues over extended periods of time. Although all safety components of a storage system need to be considered, this paper will focus on the status of the development of the technical bases associated with used fuel specifically that is in dry storage.

제안 방법

By way of example to demonstrate the approach in development of the technical bases, the remainder of this report will focus on the hydride effects in used fuel cladding that is identified as a high priority issue in Table 1.
Initial efforts in this program centered on a technical data gap assessment to identify the data gaps that need to be addressed in order to develop the technical bases for extended storage. This assessment was done for all safety components of dry storage systems including the fuel, baskets, containment boundary, neutron poisons and shields, closure lids and seals, overpacks, gamma shielding, and the concrete pad. Having identified the gaps, the next step was to prioritize the gaps relative to their importance to making the safety case for extended storage.
NDE techniques, such as profilometry, were used to observe the general condition of the fuel. This program identified no serious material degradation issues and provided the technical basis for the NRC to issue a rule change to allow for the licensing of storage systems for low burnup fuel for up to 40 years, with one allowable 40-year extension.
DOE has issued a contract to industry to initiate a long term storage confirmatory demonstration program [11]. This program will focus on dry storage of high burnup PWR and BWR used fuels of different cladding types. Intermittent inspections are planned to confirm fuel integrity and validate understanding of material degradation mechanisms developed from the experimental program.

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This paper will discuss a path forward for development of the technical bases that will address technical gaps that need to be resolved for understanding materials degradation issues over extended periods of time. Although all safety components of a storage system need to be considered, this paper will focus on the status of the development of the technical bases associated with used fuel specifically that is in dry storage. The focus will be on the U.

참고문헌 (11)

http://en.wikipedia.org/wili/Nuclear_power.
http://www.world-nuclear.org/info. 2012 data.
Werner, James D.; U.S. Spent Nuclear Fuel Storage, Congressional Research Service, CRS Report for Congress, 7-5700, R42513, May 24, 2012.
Hanson, Brady; Alsaed, Halim; Stockman Christine; Enos, David; Meyer, Ryan; Sorenson, Ken; Gap Analysis to Support Extended Storage of Used Nuclear Fuel, Rev. 0, FCRDUSED-2011-000136 Rev. 0, PNNL-20509, January 31, 2012.
U.S. Nuclear Regulatory Agency; Identification and Prioritization of the Technical Information Needs Affecting Potential Regulation of Extended Storage and Transportation of Spent Nuclear Fuel; Draft for comment.
Sorenson, Ken ; Extended Storage Collaboration Program International Subcommittee Report: International Perspectives on Technical Data Gaps Associated with Extended Storage and Transportation of Used Nuclear Fuel, Electric Power Research Institute 2012 Technical Report 1026481, November 2012.
Hanson, Brady; Stockman; Christine, Alsaed, Halim; Review of Used Nuclear Fuel Storage and Transportation Technical Gap Analyses; FCRD-USED-2012-000215, PNNL-21596, July 31, 2012.
Billone, Mike; et al.; Phase I Ring Compression testing of High-burnup Cladding, FCRD-USED-2012-000039, December 31, 2011.
Tikare, Veena; Roadmap for Developing a Computation Tool for Prediction of Hydride Precipitation and Reorientation during Long-term Dry Storage, FCRD-USED-2-13-000068, SAND2012-1083P, December 15, 2012.
Kim, Young Suk; Delayed hydride cracking of spent fuel rods in dry storage, Journal of Nuclear Materials 378 (2008), pgs. 30-34.

상세보기
News release, April 16, 2013, U.S. Department of Energy website: http://energy.gov/articles/energy-departmentannounces-new-investment-uclear -fuel-storage-research.

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MAKING THE CASE FOR SAFE STORAGE OF USED NUCLEAR FUEL FOR EXTENDED PERIODS OF TIME: COMBINING NEAR-TERM EXPERIMENTS AND ANALYSES WITH LONGER-TERM CONFIRMATORY DEMONSTRATIONS 원문보기

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MAKING THE CASE FOR SAFE STORAGE OF USED NUCLEAR FUEL FOR EXTENDED PERIODS OF TIME: COMBINING NEAR-TERM EXPERIMENTS AND ANALYSES WITH LONGER-TERM CONFIRMATORY DEMONSTRATIONS 원문보기

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