ASTM_C_1309_-_97_2012.pdf

Designation:C130997(Reapproved 2012)Standard Practice forPerformance Evaluation of In-Plant Walk-Through MetalDetectors1This standard is issued under the fixed designation C1309;the number immediately following the designation indicates the year oforiginal adoption or,in the case of 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.INTRODUCTIONNuclear regulatory authorities require personnel entering designated security areas to be screenedfor concealed weapons and personnel exiting areas containing specified quantities of special nuclearmaterial to be screened for metallic nuclear shielding materials.Portal-type walk-through metaldetectors are widely used to implement these requirements.This practice provides guidelines forevaluating the in-plant performance of walk-through metal detectors.1.Scope1.1 This practice is one of several(see Appendix X1)developed to assist operators of nuclear facilities with meetingthe metal detection performance requirements set by regulatoryauthorities.1.2 This practice consists of four procedures useful forevaluating the in-plant performance of walk-through metaldetectors(see Fig.1).1.2.1 Two of the procedures provide data for evaluatingprobability of detection.These procedures use binomial data(alarm/not alarm).1.2.1.1 The detection sensitivity test(DST)2is the initialprocedure in the detection probability evaluation series.It isused to establish the probability of detection immediately afterthe detector has been adjusted to its operational sensitivitysetting.1.2.1.2 The detection sensitivity verification test(DSVT)2procedure periodically provides data for evaluation of continu-ing detection performance.1.2.2 The third procedure is a“functional test.”It is usedroutinely to verify that a metal detector is operating andresponds with the correct audio and visual signals whensubjected to a condition that should cause an alarm.1.2.3 The fourth procedure is used to verify that alarmsgenerated during detection sensitivity testing were likely theresult of the detection of metal and not caused by outsideinterferences or the perturbation of the detection field by thetesters body mass.1.2.3.1 This procedure also can be used to establish aprobability of occurrence for false alarms,for example,20 testpasses by a clean-tester resulting in no alarms indicates a falsealarm probability of less than 0.15 at 95%confidence.Thisprocedure is optional unless required by the regulatory author-ity.1.3 This practice does not set test object specifications.Thespecifications should be issued by the regulatory authority.1.4 This practice is intended neither to set performancelevels nor to limit or constrain technologies.1.5 This practice does not address safety or operationalissues associated with the use of walk-through metal detectors.2.Referenced Documents2.1 ASTM Standards:3C1238 Guide for Installation of Walk-Through Metal Detec-torsC1269 Practice for Adjusting the Operational SensitivitySetting of In-Plant Walk-Through Metal DetectorsC1270 Practice for Detection Sensitivity Mapping of In-Plant Walk-Through Metal DetectorsF1468 Practice for Evaluation of Metallic Weapons Detec-tors for Controlled Access Search and Screening1This practice is under the jurisdiction of ASTM Committee C26 on NuclearFuel Cycleand is the direct responsibility of Subcommittee C26.12 on SafeguardApplications.Current edition approved Jan.1,2012.Published January 2012.Originallyapproved in 1995.Last previous edition approved in 1997 as C1309 97(2003).DOI:10.1520/C1309-97R12.2The DST is one of two procedures used to evaluate detection rate.TheDetection Sensitivity Verification Test(DSVT)is the other.In the evaluation teststrategy,the DST is used to initially determine and document the detection rate andthen the DSVT is used to periodically check that the detection rate continues to meetthe requirements.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 clean-tester,na person who does not carry anyextraneous metallic objects that would significantly alter thesignal produced when the person carries a test object.3.1.1.1 DiscussionBy example but not limitation,suchextraneous metallic objects may include:metallic belt buckles,metal buttons,cardiac pacemakers,coins,metal frameeyeglasses,hearing aids,jewelry,keys,mechanical pens andpencils,shoes with metal shanks or arch supports,metallicsurgical implants,undergarment support metal,metal zippers,etc.In the absence of other criteria,a clean-tester passingthrough a metal detector shall not ca