ASTM C1189-02

Standard Guide to Procedures for Calibrating Automatic Pedestrian SNM Monitors (Withdrawn 2011)

SIGNIFICANCE AND USE
SNM monitors are an effective means to search pedestrians for concealed SNM. Maintaining monitor effectiveness rests on appropriate calibration and adjustment being part of a continuing maintenance program.
The significance of this guide for monitor users who must detect SNM is to describe calibration and adjustment procedures for the purpose.
The significance of this guide for monitor manufacturers is to describe calibration procedures, particularly for detecting forms of SNM that may not be readily available to them.
SCOPE
1.1 This guide covers calibrating the energy response of the radiation detectors and setting the discriminator and alarm thresholds used in automatic pedestrian special nuclear material (SNM) monitors.
1.2 Automatic pedestrian SNM Monitors and their application are described in Guide C 1112, which suggests that the monitors be calibrated and tested when installed and that, thereafter, the calibration should be checked and the monitor tested with SNM at three-month intervals.
1.3 Dependable operation of SNM monitors rests, in part, on an effective program to test, calibrate, and maintain them. The procedures and methods described in this guide may help both to achieve dependable operation and obtain timely warning of misoperation.
1.4 This guide can be used in conjunction with other ASTM standards. illustrates the relationship between calibration and other procedures described in standard guides, and it also shows how the guides relate to an SNM monitor user. The guides below the user in the figure deal with routine procedures for operational monitors. Note that Guide C 993 is an in-plant performance evaluation that is used to verify acceptable detection of SNM after a monitor is calibrated. The guides shown above the user in give information on applying SNM monitors (C 1112) and on evaluating SNM monitors (C 1169) to provide comparative information on monitor performance.
WITHDRAWN RATIONALE
This guide covers calibrating the energy response of the radiation detectors and setting the discriminator and alarm thresholds used in automatic pedestrian special nuclear material (SNM) monitors.
Formerly under the jurisdiction of Committee C26 on Nuclear Fuel Cycle, this guide was withdrawn in January 2011 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Historical
• Publication Date: 09-Jan-2002
• Withdrawal Date: 31-Dec-2010
• ICS: 93.080.30 - Road equipment and installations
• Technical Committee: C26 - Nuclear Fuel Cycle

Relations

• Replaces: ASTM C1189-95(2001) - Standard Guide to Procedures for Calibrating Automatic Pedestrian SNM Monitors
• Effective Date: 10-Jan-2002
• Replaced By: ASTM C1189-11 - Standard Guide to Procedures for Calibrating Automatic Pedestrian SNM Monitors
• Effective Date: 01-Jun-2011

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:C1189–02
Standard Guide to
Procedures for Calibrating Automatic Pedestrian SNM
1
Monitors
This standard is issued under the fixed designation C1189; 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.
1. Scope
1.1 This guide covers calibrating the energy response of the
radiation detectors and setting the discriminator and alarm
thresholds used in automatic pedestrian special nuclear mate-
rial (SNM) monitors.
1.2 Automatic pedestrian SNM Monitors and their applica-
tion are described in Guide C1112, which suggests that the
monitors be calibrated and tested when installed and that,
thereafter, the calibration should be checked and the monitor
tested with SNM at three-month intervals.
1.3 Dependable operation of SNM monitors rests, in part,
on an effective program to test, calibrate, and maintain them.
The procedures and methods described in this guide may help
both to achieve dependable operation and obtain timely warn-
ing of misoperation.
1.4 This guide can be used in conjunction with otherASTM
standards.Fig.1illustratestherelationshipbetweencalibration
FIG. 1 The Relationship of Calibration to Other Procedures
and other procedures described in standard guides, and it also
Described in Standard Guides for SNM Monitors
shows how the guides relate to an SNM monitor user. The
guidesbelowtheuserinthefiguredealwithroutineprocedures
C1112 Guide for Application of Radiation Monitors to the
for operational monitors. Note that Guide C993 is an in-plant
performance evaluation that is used to verify acceptable Control and Physical Security of Special Nuclear Material
detection of SNM after a monitor is calibrated. The guides C1169 Guide for Laboratory Evaluation of Automatic Pe-
shown above the user in Fig. 1 give information on applying destrian SNM Monitor Performance
SNM monitors (C1112) and on evaluating SNM monitors E876 Practice for Use of Statistics in the Evaluation of
3
(C1169) to provide comparative information on monitor per- Spectrometric Data
formance.
3. Terminology
2. Referenced Documents
3.1 Definitions of Terms Specific to This Standard:
2
2.1 ASTM Standards: 3.1.1 calibration—a multistep procedure that uniformly
C859 Terminology Relating to Nuclear Materials adjusts the energy response of a monitor’s detector array and
C993 Guide for In-Plant Performance Evaluation of Auto- sets the operating parameters of its detection circuits for
matic Pedestrian SNM Monitors optimum performance. In a few monitors, an additional analog
adjustment of a signal detection circuit is required.
3.1.2 SNM—special nuclear material: plutonium of any
233
isotopic composition, U, or enriched uranium as defined in
1
This guide is under the jurisdiction ofASTM Committee C26 on Nuclear Fuel
Terminology C859.
Cycle and is the direct responsibility of Subcommittee C26.12 on Safeguard
Applications.
3.1.2.1 Discussion—This term is used here to describe both
Current edition approved Jan. 10, 2002. Published April 2002. Originally
SNM and strategic SNM, which is plutonium, uranium-233,
approved in 1991. Last previous edition approved in 2001 as C1189 – 95 (2001).
235
and uranium enriched to 20% or more in the U isotope.
DOI: 10.1520/C1189-02.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1189–02
3.1.3 SNM Monitor—a radiation detection system that mea- 7.2 Radiation Detectors, used in SNM monitors may detect
sures ambient radiation intensity, determines an alarm thresh- gamma rays, neutrons, or both. One of three types of detector
oldfromtheresult,andthenwhenitmonitors,soundsanalarm listed is usually used. All of types of detector operate in a
if its measured radiation intensity exceeds the threshold. pulse-counting mode to obtain good sensitivity for detecting
3.1.3.1 Discussion—The automatic pedestrian SNM moni- small changes in radiation intensity.
tor discussed here is a walk-through or wait-in portal or 7.2.1 Inorganic Scintillation Detectors, such as sodium
monitoring booth. iodide [NaI(T1)], detect gamma rays but have little response to
neutrons from SNM. This detector is useful for detecting
4. Summary of Guide
unshielded SNM.
4.1 This guide cov
...