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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.
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 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 warning of misoperation.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C859 Terminology Relating to Nuclear Materials
C993 Guide for In-Plant Performance Evaluation of Automatic Pedestrian SNM Monitors
C1112 Guide for Application of Radiation Monitors to the Control and Physical Security of Special Nuclear Material
C1169 Guide for Laboratory Evaluation of Automatic Pedestrian SNM Monitor Performance
E876 Practice for Use of Statistics in the Evaluation of Spectrometric Data
ICS Number Code 93.080.30 (Road equipment and installations)
UNSPSC Code 41111929(Radiation detectors)