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Title: Inspection of Used Fuel Dry Storage Casks

Abstract

ABSTRACT The U.S. Nuclear Regulatory Commission (NRC) regulates the storage of used nuclear fuel, which is now and will be increasingly placed in dry storage systems. Since a final disposition pathway is not defined, the fuel is expected to be maintained in dry storage well beyond the time frame originally intended. Due to knowledge gaps regarding the viability of current dry storage systems for long term use, efforts are underway to acquire the technical knowledge and tools required to understand the issues and verify the integrity of the dry storage system components. This report summarizes the initial efforts performed by researchers at Idaho National Laboratory and Argonne National Laboratory to identify and evaluate approaches to in-situ inspection dry storage casks. This task is complicated by the design of the current storage systems that severely restrict access to the casks.

Authors:
; ; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
1056020
Report Number(s):
INL/EXT-12-27119
DOE Contract Number:
DE-AC07-05ID14517
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 12 MGMT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; Dry Storage; Nondestructive evaluation; Used Nuclear Fuel

Citation Formats

Dennis C. Kunerth, Tim McJunkin, Mark McKay, and Sasan Bakhtiari. Inspection of Used Fuel Dry Storage Casks. United States: N. p., 2012. Web. doi:10.2172/1056020.
Dennis C. Kunerth, Tim McJunkin, Mark McKay, & Sasan Bakhtiari. Inspection of Used Fuel Dry Storage Casks. United States. doi:10.2172/1056020.
Dennis C. Kunerth, Tim McJunkin, Mark McKay, and Sasan Bakhtiari. Sat . "Inspection of Used Fuel Dry Storage Casks". United States. doi:10.2172/1056020. https://www.osti.gov/servlets/purl/1056020.
@article{osti_1056020,
title = {Inspection of Used Fuel Dry Storage Casks},
author = {Dennis C. Kunerth and Tim McJunkin and Mark McKay and Sasan Bakhtiari},
abstractNote = {ABSTRACT The U.S. Nuclear Regulatory Commission (NRC) regulates the storage of used nuclear fuel, which is now and will be increasingly placed in dry storage systems. Since a final disposition pathway is not defined, the fuel is expected to be maintained in dry storage well beyond the time frame originally intended. Due to knowledge gaps regarding the viability of current dry storage systems for long term use, efforts are underway to acquire the technical knowledge and tools required to understand the issues and verify the integrity of the dry storage system components. This report summarizes the initial efforts performed by researchers at Idaho National Laboratory and Argonne National Laboratory to identify and evaluate approaches to in-situ inspection dry storage casks. This task is complicated by the design of the current storage systems that severely restrict access to the casks.},
doi = {10.2172/1056020},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Sep 01 00:00:00 EDT 2012},
month = {Sat Sep 01 00:00:00 EDT 2012}
}

Technical Report:

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  • This directory contains Certificates of Compliance for all dry spent fuel storage casks approved by the US Nuclear Regulatory Commission and Summary Reports of each approved cask model. Later directories will contain a list of cask users, and a list of cask locations. The purpose of this directory is to make available a convenient source of information on spent fuel storage casks which have been approved by the US Nuclear Regulatory Commission. Storage of fuel assemblies using these casks must be in accordance with the provisions of 10 CFR Part 72.
  • The Cask Standard Review Plan (CSRP) has been prepared as guidance to be used in the review of Cask Safety Analysis Reports (CSARs) for storage packages. The principal purpose of the CSRP is to assure the quality and uniformity of storage cask reviews and to present a well-defined base from which to evaluate proposed changes in the scope and requirements of reviews. The CSRP also sets forth solutions and approaches determined to be acceptable in the past by the NRC staff in dealing with a specific safety issue or safety-related design area. These solutions and approaches are presented in thismore » form so that reviewers can take consistent and well-understood positions as the same safety issues arise in future cases. An applicant submitting a CSAR does not have to follow the solutions or approaches presented in the CSRP. However, applicants should recognize that the NRC staff has spent substantial time and effort in reviewing and developing their positions for the issues. A corresponding amount of time and effort will probably be required to review and accept new or different solutions and approaches.« less
  • This directory contains Certificates of Compliance for all dry spent fuel storage casks approved by the US Nuclear Regulatory Commission and Summary Reports of each approved cask model. Later directories will contain a list of cask users, and a list of cask locations. The purpose of this directory is to make available a convenient source of information on spent fuel storage casks which have been approved by the US Nuclear Regulatory Commission. Storage of fuel assemblies using these casks must be in accordance with the provisions of 10 CFR Part 72.
  • The resulting dose consequences from releases of spent nuclear fuel (SNF) residing in a dry storage casks are examined parametrically. The dose consequences are characterized by developing dose versus distance curves using simplified bounding assumptions. The dispersion calculations are performed using the MELCOR Accident Consequence Code System (MACCS2) code. Constant weather and generic system parameters were chosen to ensure that the results in this report are comparable with each other and to determine the relative impact on dose of each variable. Actual analyses of site releases would need to accommodate local weather and geographic data. These calculations assume a rangemore » of fuel burnups, release fractions (RFs), three exposure scenarios (2 hrs and evacuate, 2 hrs and shelter, and 24 hrs exposure), two meteorological conditions (D-4 and F-2), and three release heights (ground level 1 meter (m), 10 m, and 100 m). This information was developed to support a policy paper being developed by U.S. Nuclear Regulatory Commission (NRC) staff on an independent spent fuel storage installation (ISFSI) and monitored retrievable storage installation (MRS) security rulemaking.« less
  • Highly energetic cosmic ray muons are a natural source of ionizing radiation that can be used to make tomographic images of the interior of dense objects. Muons are capable of penetrating large amounts of shielding that defeats typical radiographic probes like neutrons or photons. This is the only technique which can examine spent nuclear fuel rods sealed inside dry casks.