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Study on clearance system

Abstract

The clearance system is a legal system to release 'the radioactive waste not requiring treatment as radioactive waste' from the regulatory control. JNES supports Nuclear Regulatory Agency on approval and confirmation of clearance measurement and judgment developed by the operator. The objective of this study is to establish technical base of the validation method of the clearance measurement for various objects. In uranium processing facilities, simulation sources emitting alpha-rays is used in a validity confirmation examination of the measuring equipment. In this study, these sources were examined by measuring alpha and beta spectra to evaluate the applicability and problem of these sources. In addition, the measuring method detecting gamma-rays was examined. This method can be applied to complicated objects. As a part to develop a manual for unexpected incidents in clearance system, a quick method for measurement of Strontium 90 was examined. In addition, the measuring methods for the judgment of the influence of fallout and for NR (Non-Radioactive) confirmation were examined. (author)
Publication Date:
Aug 15, 2013
Product Type:
Technical Report
Report Number:
JNES-RE-2013-0001
Resource Relation:
Other Information: 6 refs., 6 figs., 1 tab.; Related Information: In: Annual safety research report, JFY 2012| Japan Nuclear Energy Safety Organization, Tokyo (Japan)| 708 p.
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; ALPHA PARTICLES; ALPHA SPECTRA; BETA SPECTRA; CLEARANCE; FALLOUT; GAMMA RADIATION; JNES; MANUALS; MEASURING METHODS; RADIOACTIVE WASTES; SIMULATION; STRONTIUM 90; URANIUM
OSTI ID:
22321047
Research Organizations:
Japan Nuclear Energy Safety Organization, Nuclear Fuel Cycle and Radioactive Waste Management Safety Department, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
TRN: JP1500847027249
Availability:
Available from the Internet at URL http://www.nsr.go.jp/archive/jnes/content/000125907.pdf
Submitting Site:
INIS
Size:
page(s) 287-296
Announcement Date:
Apr 03, 2015

Citation Formats

None. Study on clearance system. Japan: N. p., 2013. Web.
None. Study on clearance system. Japan.
None. 2013. "Study on clearance system." Japan.
@misc{etde_22321047,
title = {Study on clearance system}
author = {None}
abstractNote = {The clearance system is a legal system to release 'the radioactive waste not requiring treatment as radioactive waste' from the regulatory control. JNES supports Nuclear Regulatory Agency on approval and confirmation of clearance measurement and judgment developed by the operator. The objective of this study is to establish technical base of the validation method of the clearance measurement for various objects. In uranium processing facilities, simulation sources emitting alpha-rays is used in a validity confirmation examination of the measuring equipment. In this study, these sources were examined by measuring alpha and beta spectra to evaluate the applicability and problem of these sources. In addition, the measuring method detecting gamma-rays was examined. This method can be applied to complicated objects. As a part to develop a manual for unexpected incidents in clearance system, a quick method for measurement of Strontium 90 was examined. In addition, the measuring methods for the judgment of the influence of fallout and for NR (Non-Radioactive) confirmation were examined. (author)}
place = {Japan}
year = {2013}
month = {Aug}
}