ASTM E1760-2016 Standard Guide for Unrestricted Disposition of Bulk Materials Containing Residual Amounts of Radioactivity《含放射性残留量的散体物料不受限处置的标准指南》.pdf
《ASTM E1760-2016 Standard Guide for Unrestricted Disposition of Bulk Materials Containing Residual Amounts of Radioactivity《含放射性残留量的散体物料不受限处置的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM E1760-2016 Standard Guide for Unrestricted Disposition of Bulk Materials Containing Residual Amounts of Radioactivity《含放射性残留量的散体物料不受限处置的标准指南》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E1760 09E1760 16Standard Guide forUnrestricted Disposition of Bulk Materials ContainingResidual Amounts of Radioactivity1This standard is issued under the fixed designation E1760; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe feasibility of the recycle of recycling bulk material containing trace amounts of radioactiv
3、econtamination depends on the dose to the public that could occur as a result. However, the assessmentof this dose depends not only on the measurements of contaminants present, but also on the future useof the material and the pathways by which persons can be exposed. This guide provides arecommende
4、d approach to support a petition (to a regulatory agency) seeking approval for the recycleor disposal of the material outside of the radioactive materials regulatory arena.control.Since dose rate limits to the public have been established by regulation, this approach is arecommended way regulation f
5、or decommissioning by NRC (25 mRem/y) and remediation sites byEPA (15 mRem/y), this guide provides an approach to demonstrate compliance with them.thoseregulations.The Scope defines the range of applicability of this guide; the Summary identifies the two majorsteps that comprise the method; and the
6、significance of the guide is given in Section This guide 5.Section 6 discusses the need for dose rate based release criteria, and Section 7 delineates the steps fordeciding whether or not a material should be considered for recycle. Section 8describes the stepsneeded to implement the recommendations
7、 of this guide including recommendations for thedevelopment of a data package to support the petition and to serve as a permanent record.1. Scope1.1 This guide covers the techniques for provides an approach for developing a basis for obtaining approval for release ofmaterials encountered in bulk mat
8、erials to be removed from a decontamination and decommissioning (D “Users Manual for RESRAD-BUILD,” ANL/EAD-03-1,”; “Users Manual for RESRAD-OFFSITE,”NUREG/CR-6937 and “RESRAD-RECYCLE, A Computer Model for Analyzing the Radiological Dose and Risks Resulting from the Recycle of Scrap Metal and the Re
9、useof Surface Contaminated Material and Equipment,” ANL/EAD-3. Available online at www.ead.anl.gov.6 International Atomic Energy Agency, Wagramerstrasse 5, P.O. Box 100, A-1400 Vienna, Austria.7 Available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.E17
10、60 1633.1.8 non-impacted, adjterm that applies to material and equipment where there is no reasonable potential to containradionuclide concentration(s) or radioactivity above background.3.1.9 impacted, adjterm that applies to material and equipment that is not classified as non-impacted.4. Objective
11、4.1 The objective of this guide is to provide a methodology for distinguishing between material that must be carefully isolatedto prevent human contact from that which can be recycled or otherwise disposed of. It applies to material in which the radioactivityis dispersed more or less uniformly throu
12、ghout the volume of the material (termed residual in bulk form) as opposed to surfacecontaminated objects.4.2 Surface contaminated objects are materials externally contaminated with radioactive material. Provisions already exist fortheir release for recycle if it can be shown that they meet applicab
13、le federal and state regulatory requirements for surfacecontamination. NRC IE Circular 8107, Regulatory Guide 1.86 and DOE Order 458.1 provide guidance on radioactive surfacecontamination levels on material to be released for unrestricted use.4.3 The release of bulk material containing residual radi
14、oactive material (except for 226Ra), such as soil, equipment and buildingrubble or slightly activated metal, is based on the demonstration that the dose to a member of the public will be lower than aspecified value (proposed by the petitioner or defined by regulation) for its intended use and lower
15、than a second specified valuevia the most restrictive plausible scenario. The first proposed value should be lower than the second since the dose to any memberof the public (via the intended use scenario) will almost certainly be realized, whereas the dose from the alternate scenario willonly accrue
16、 if an unintended (and presumably less probable) circumstance arises. Federal regulation already exists for the releaseof 226Ra contaminated soils (40 CFR 192).5. Summary of Guide5.1 The owner of the material must first determine if the material is candidate for release.To do this one must take repr
17、esentativesamples of the bulk material and identify the radioactive contaminants and concentrations. The MARLAP document presentslaboratory protocols that provide assurances for the quality and accuracy of the sample analysis. Sampling should be done usingstandard statistical inspection methods. The
18、 MARSSIM document provides guidance for design of sampling protocols inaccordance with accepted statistical standards. For bulk materials contaminated on the exposed surfaces only, Guide E1893provides guidance for measurement and assessment of this radioactivity.The kinds of analyses shall be approp
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