ASTM C1270-97(2003)

Standard Practice for Detection Sensitivity Mapping of In-Plant Walk-Through Metal Detectors

SCOPE
1.1 This standard practice covers a procedure for determining the weakest detection path through the portal aperture and the worst-case orthogonal orientation of metallic test objects. It results in detection sensitivity maps, which model the detection zone in terms related to detection sensitivity and identify the weakest detection paths. Detection sensitivity maps support sensitivity adjustment and performance evaluation procedures (see Practices C1269 and C1309).
Note 1—Unsymmetrical metal objects possessing a primary longitudinal component, such as handguns and knives, usually have one particular orientation that produces the weakest detection signal. The orientation and the path through the detector aperture where the weakest response is produced may not be the same for all test objects, even those with very similar appearance.
Note 2—In the case of multiple specified test objects or for test objects that are orientation sensitive, it may be necessary to map each object several times to determine the worst-case test object or orientation, or both.  
1.2 This practice is one of several developed to assist operators of walk-through metal detectors with meeting the metal detection performance requirements of the responsible regulatory authority. (See Appendix X2)
1.3 This practice is neither intended to set performance levels, nor limit or constrain operational technologies.
1.4 This practice does not address safety or operational issues associated with the use of walk-through metal detectors.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 09-Dec-1997
• ICS: 03.080.30 - Services for consumers
• ICS: 13.320 - Alarm and warning systems
• Technical Committee: C26 - Nuclear Fuel Cycle

Relations

• Replaces: ASTM C1270-97 - Standard Practice for Detection Sensitivity Mapping of In-Plant Walk-Through Metal Detectors
• Effective Date: 10-Dec-1997

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1270–97(Reapproved2003)
Standard Practice for
Detection Sensitivity Mapping of In-Plant Walk-Through
1
Metal Detectors
This standard is issued under the fixed designation C1270; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Nuclear regulatory authorities require personnel entering designated security areas to be screened
for concealed weapons. Additionally, in security areas containing specified quantities of special
nuclearmaterials,exitingpersonnelarerequiredtobescreenedformetallicnuclearshieldingmaterial.
Walk-through metal detectors are widely used to implement these requirements.
A number of environmental conditions, architectural and electrical arrangements near the detector,
and detector characteristics affect the detection of metallic objects passing through the walk-through
metal detector.These external effects and detector characteristics are discussed in Practices F1468 and
C1269, and Guide C1238. This practice is intended to minimize the effects of these variables on
detector operation by providing the operator with baseline information on the metal detection
sensitivity within the portal aperture, particularly the location of any weak areas of detection.The data
is obtained by mapping the detection zone (volume within the portal) of each detector at its field
location, under normal operating conditions, and using the target test object. The maps, when applied
to detector operation, ensure that the effects of the fixed environmental conditions, architectural and
electrical arrangements, and detector characteristics are taken into account during operational
sensitivity adjustment, performance evaluation, and general operation of detectors.
1. Scope 1.2 This practice is one of several developed to assist
operators of walk-through metal detectors with meeting the
1.1 This standard practice covers a procedure for determin-
metal detection performance requirements of the responsible
ing the weakest detection path through the portal aperture and
regulatory authority. (See Appendix X2)
the worst-case orthogonal orientation of metallic test objects. It
1.3 This practice is neither intended to set performance
resultsindetectionsensitivitymaps,whichmodelthedetection
levels, nor limit or constrain operational technologies.
zone in terms related to detection sensitivity and identify the
1.4 This practice does not address safety or operational
weakest detection paths. Detection sensitivity maps support
issues associated with the use of walk-through metal detectors.
sensitivity adjustment and performance evaluation procedures
1.5 The values stated in SI units are to be regarded as the
(see Practices C1269 and C1309).
standard. The values given in parentheses are for information
NOTE 1—Unsymmetrical metal objects possessing a primary longitudi-
only.
nal component, such as handguns and knives, usually have one particular
orientation that produces the weakest detection signal.The orientation and
2. Referenced Documents
the path through the detector aperture where the weakest response is
2
2.1 ASTM Standards:
produced may not be the same for all test objects, even those with very
C1238 Guide for Installation of Walk-Through Metal De-
similar appearance.
NOTE 2—In the case of multiple specified test objects or for test objects tectors
that are orientation sensitive, it may be necessary to map each object
C1269 Practice for Adjusting the Operational Sensitivity
several times to determine the worst-case test object or orientation, or
Setting of In-Plant Walk-Through Metal Detectors
both.
C1309 Practice for Performance Evaluation of In-Plant
Walk-Through Metal Detectors
1
This practice is under the jurisdiction of ASTM Committee C26 on Nuclear
Fuel Cycle and is the direct responsibility of Subcommittee C26.12 on Safeguard
2
Applications. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 10, 2003. Published February 2003. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1994. Last previous edition approved in 1997 as C1270 – 97. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1270-97R03. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1270–97 (2003)
F1468 Practice for Evaluation of Metallic Weapons Detec- the worst case orthogonal orientation for all the test paths (the
tors for Controlled Access
...