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Title: Nondestructive Nuclear Fuel Examination System

Authors:
 [1]
  1. Physical Optics Corporation, Torrance, CA (United States)
Publication Date:
Research Org.:
Physical Optics Corporation, Torrance, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1173173
Report Number(s):
DOE1937
4863
DOE Contract Number:
SC0011937
Type / Phase:
SBIR
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; Nondestructive evaluation of nuclear fuel; Transient testing; Compton imaging tomography; Compton scattered X-rays; Nondestructive inspection; High-resolution 3D X-ray imaging; Linear accelerator X-ray source

Citation Formats

Romanov, Volodymyr. Nondestructive Nuclear Fuel Examination System. United States: N. p., 2015. Web.
Romanov, Volodymyr. Nondestructive Nuclear Fuel Examination System. United States.
Romanov, Volodymyr. Fri . "Nondestructive Nuclear Fuel Examination System". United States. doi:.
@article{osti_1173173,
title = {Nondestructive Nuclear Fuel Examination System},
author = {Romanov, Volodymyr},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 20 00:00:00 EDT 2015},
month = {Fri Mar 20 00:00:00 EDT 2015}
}

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  • This report summarizes an evaluation of the potential use of nondestructive assay (NDA) and nondestructive examination (NDE) technologies on DOE spent nuclear fuel (SNF). It presents the NDA/NDE information necessary for the National Spent Nuclear Fuel Program (NSNFP) and the SNF storage sites to use when defining that role, if any, of NDA/NDE in characterization and certification processes. Note that the potential role for NDA/NDE includes confirmatory testing on a sampling basis and is not restricted to use as a primary, item-specific, data collection method. The evaluation does not attempt to serve as a basis for selecting systems for developmentmore » or deployment. Information was collected on 27 systems being developed at eight DOE locations. The systems considered are developed to some degree, but are not ready for deployment on the full range of DOE SNF and still require additional development. The system development may only involve demonstrating performance on additional SNF, packaging the system for deployment, and developing calibration standards, or it may be as extensive as performing additional basic research. Development time is considered to range from one to four years. We conclude that NDA/NDE systems are capable of playing a key role in the characterization and certification of DOE SNF, either as the primary data source or as a confirmatory test. NDA/NDE systems will be able to measure seven of the nine key SNF properties and to derive data for the two key properties not measured directly. The anticipated performance goals of these key properties are considered achievable except for enrichment measurements on fuels near 20% enrichment. NDA/NDE systems can likely be developed to measure the standard canisters now being considered for co-disposal of DOE SNF. This ability would allow the preparation of DOE SNF for storage now and the characterization and certification to be finalize later.« less
  • A test plan for the third and final nondestructive examination of eight fuel rods used in a low-temperature, long-term, dry fuel storage program is presented. This examination is part of a long-range project to evaluate the behavior of spent fuel during dry fuel storage conditions. The objective of this project is to provide the Nuclear Regulatory Commission with the information to confirm or establish spent-fuel dry storage licensing positions for long-term, low-temperature (<523 K), spent fuel rod behavior during dry storage and for radioactive contamination arising from spallation of cladding crud. This examination consists of visual and photographic examinations, dimensionalmore » measurements, and gamma scanning of eight fuel rods. 4 figures, 5 tables.« less
  • Nuclear fuel is the core component of reactors that is used to produce the neutron flux required for irradiation research purposes as well as commercial power generation. The development of nuclear fuels with low enrichments of uranium is a major endeavor of the RERTR program. In the development of these fuels, the RERTR program uses nondestructive examination (NDE) techniques for the purpose of determining the properties of nuclear fuel plate experiments without imparting damage or altering the fuel specimens before they are irradiated in a reactor. The vast range of properties and information about the fuel plates that can bemore » characterized using NDE makes them highly useful for quality assurance and for analyses used in modeling the behavior of the fuel while undergoing irradiation. NDE is also particularly useful for creating a control group for post-irradiation examination comparison. The two major categories of NDE discussed in this paper are X-ray radiography and ultrasonic testing (UT) inspection/evaluation. The radiographic scans are used for the characterization of fuel meat density and homogeneity as well as the determination of fuel location within the cladding. The UT scans are able to characterize indications such as voids, delaminations, inclusions, and other abnormalities in the fuel plates which are generally referred to as debonds as well as to determine the thickness of the cladding using ultrasonic acoustic microscopy methods. Additionally, the UT techniques are now also being applied to in-canal interim examination of fuel experiments undergoing irradiation and the mapping of the fuel plate surface profile to determine fuel swelling. The methods used to carry out these NDE techniques, as well as how they operate and function, are described along with a description of which properties are characterized.« less