1、Designation:E176009Standard 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 revision,the
2、 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 bulk material containing trace amounts of radioactive contaminationdepends on t
3、he dose to the public that could occur as a result.However,the assessment of this dosedepends not only on the measurements of contaminants present,but also on the future use of thematerial and the pathways by which persons can be exposed.This guide provides a recommendedapproach to support a petitio
4、n(to a regulatory agency)seeking approval for the recycle or disposal ofthe material outside of the radioactive materials regulatory arena.Since dose rate limits have been established by regulation,this approach is a recommended way todemonstrate compliance with them.The Scope defines the range of a
5、pplicability of this guide;the Summary identifies the two majorsteps that comprise the method;and the significance of the guide is given in Section 5.Section 6discusses the need for dose rate based release criteria,and Section 7 delineates the steps for decidingwhether or not a material should be co
6、nsidered for recycle.Section 8 describes the steps needed toimplement the recommendations of this guide including the development of a data package to supportthe petition and to serve as a permanent record.1.Scope1.1 This guide covers the techniques for obtaining approvalfor release of materials enc
7、ountered in decontamination anddecommissioning(D&D)from restricted use.This would beaddressed in the decommissioning plan(E1281).It applies tomaterials that do not meet any of the requirements forregulatory control because of radioactivity content.Fig.1shows the logic diagram for determining the mat
8、erials thatcould be considered for release.Materials that negotiate thislogic tree are referred to as“candidate for release based ondose.”1.2 The objective of this guide is to provide a methodologyfor distinguishing between material that must be carefullyisolated to prevent human contact from that t
9、hat can berecycled or otherwise disposed of.It applies to material inwhich the radioactivity is dispersed more or less uniformlythroughout the volume of the material(termed residual in bulkform)as opposed to surface contaminated objects.1.3 Surface contaminated objects are materials externallycontam
10、inated with radioactive material.Provisions alreadyexist for their release for recycle if it can be shown that theymeet applicable federal and state regulations for surfacecontamination.Regulatory Guide 1.86 and DOE Order 5400.5specify the upper limits for radioactive surface contaminationon materia
11、l to be released for unrestricted use.1.4 The release of material containing residual radioactivematerial(except for226Ra)in bulk form(for example,soil orslightly activated metal)is based on the demonstration that thedose to a member of the public will be lower than a specifiedvalue(proposed by the
12、petitioner or defined by regulation)forits intended use and lower than a second specified value via themost restrictive plausible scenario.The first proposed valueshould be lower than the second since the dose to any memberof the public(via the intended use scenario)will almostcertainly be realized,
13、whereas the dose from the alternatescenario will only accrue if an unintended(and presumably lessprobable)circumstance arises.Federal regulation already ex-ists for the release of226Ra contaminated soils.1.5 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demons
14、trated healthrisks for users and for those with whom they come into contact.In addition to other precautions,when working with asbestosproducts,minimize the dust that results.For information on the1This guide is under the jurisdiction of ASTM Committee E10 on NuclearTechnology and Applicationsand is
15、 the direct responsibility of SubcommitteeE10.03 on Radiological Protection for Decontamination and Decommissioning ofNuclear Facilities and Components.Current edition approved June 1,2009.Published June 2009.Originallyapproved in 1996.Last previous edition approved in 2003 as E1760-96(2003)1.DOI:10
16、.1520/E1760-09.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 safe use of chrysoltile asbestos,refer to“Safe Use of Chryso-tile Asbestos:A Manual on Preventive and Control Measures.”1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulator
