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IEC 61322

Radiation Protection Instrumentation - Installed Dose Equivalent Rate Meters, Warning Assemblies and Monitors for Neutron Radiation of Energy from Thermal to 15 MeV

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Organization: IEC
Publication Date: 1 November 1994
Status: inactive
Page Count: 84
ICS Code (Protection against dangerous goods): 13.300
ICS Code (Radiation protection): 13.280
ICS Code (Radiation measurements): 17.240
scope:

Scope and object

This International Standard applies to installed dose equivalent rate meters, warning assemblies and monitors, as defined in clause 1.4. It covers equipment intended to measure neutron radiation in dose equivalent quantities of energy between thermal and 15 MeV for the purposes of radiation protection.

NOTE - Assemblies of this type are commonly defined as area radiation monitors. They are normally employed to determine continuously the radiological situation in working areas in which the radiation field may change with time, for example, nuclear power plants, particle accelerators, high-activity laboratories, fuel reprocessing plants, etc., and to provide alarms when the radiation field goes outside predetermined limits. Typically, the range of measurement will be from the order of 10 pSv per hour upward. This standard may not be directly applicable to equipment for use in pulsed radiation fields, for example those emanating from pulsed radiation or particle accelerators.

National regulations or practice may require the measurement of ambient dose equivalent. This standard may be applied to the performance characteristics of equipment to measure this quantity. For example, the numerical values given for the requirements for the radiation characteristics apply to this case, but the conventionally true values would be expressed in the appropriate quantity.

The assemblies considered in this standard comprise at least:

- a detection subassembly, which may, for example, consist of a detector probe (BF3 proportional counter tube, 3He proportional counter tube, Li-l scintillation detector, etc.) and a moderating and absorbing medium surrounding the detector;

- a measuring subassembly, which may be fitted into a centralized panel, which, in the case of warning assemblies and monitors, provides signal outputs and contacts capable of activating alarm or other trip circuits for the purposes of radiation protection.

This standard is also applicable to installed dose equivalent rate measuring assemblies designed for special application (for example, very high dose equivalent rates). However, some of the requirements may need to be amended or supplemented, according to the particular characteristics of such assemblies.

This standard is not applicable to criticality monitors, or to assemblies intended to give information about operational parameters of nuclear plants for control purposes.

Assemblies designed to perform combined functions shall comply with the requirements pertaining to each of these functions. Assemblies intended for, and designed to perform, only one function, but which are also capable of executing other functions, need only comply with the requirements for their intended function, but compliance with the requirements for the other functions is desirable.

This standard is not applicable to the operating characteristics of indicating or recording instruments as such (for instance, indicating meters, recorders, alarms, etc.). The characteristics of such instruments shall be in conformity with the general requirements appropriate to them.

This standard specifies standard general characteristics, general test procedures, radiation, electrical, safety and environmental characteristics, as well as the identification certificate for the assemblies defined in the scope.

Document History

January 1, 2020
Radiation protection instrumentation – Installed ambient dose equivalent rate meters, warning and monitoring assemblies for neutrons with energies from thermal to 20 MeV
This document applies to installed dose equivalent rate meters, warning assemblies and monitors, as defined below. It covers equipment intended to measure neutron radiation in dose equivalent rates...
IEC 61322
November 1, 1994
Radiation Protection Instrumentation - Installed Dose Equivalent Rate Meters, Warning Assemblies and Monitors for Neutron Radiation of Energy from Thermal to 15 MeV
Scope and object This International Standard applies to installed dose equivalent rate meters, warning assemblies and monitors, as defined in clause 1.4. It covers equipment intended to measure...

References

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