IEC 61005-2014 pdf – Radiation protection instrumentation – Neutron ambient dose equivalent (rate) meters.
1 Scope This International Standard is applicable to assemblies designed to measure the ambient dose equivalent (rate) due to neutron radiation in fields that contain neutrons with energies below 20 MeV, and which comprise at least: a) a detection assembly, which may, for example, consist of a detector probe for thermal neutrons and an arrangement of neutron moderating and absorbing media surrounding the detector; b) a measuring assembly with a display for the measured quantity, which may be incorporated into a single assembly with the detector or connected to it by means of a flexible cable. Instruments with energy range up to 20 MeV are covered by this standard. If the instrument also provides indication of the neutron dose, it should meet the neutron dose requirements stated in this standard. No tests are specified in this standard for performance requirements of assemblies in pulsed radiation fields. It is understood that an assembly designed to meet this standard may not be suitable for use in such fields. The object of this standard is to specify requirements for the performance characteristics of neutron ambient dose equivalent (rate) meters, and to prescribe the methods of testing in order to determine compliance with this standard. This standard specifies general characteristics, general test procedures, radiation characteristics, electrical, mechanical, safety and environmental characteristics, and also the identification certificate (see 1 3.2). Requirements and test procedures are also specified for the alarm performance of the neutron ambient dose equivalent (rate) meters, equipped with alarm provisions. NOTE The response of ambient dose equivalent (rate) meters for neutrons is energy dependent and may deviate considerably from unity. The response in realistic neutron fields, however, is such that the response deviations in different energy ranges tend to offset each other . Consequently, the response in realistic fields is generally much closer to unity.
IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 61 1 87, Electrical and electronic measuring equipment – Documentation IEC 62706, Radiation protection instrumentation – Environmental, electromagnetic and mechanical requirements ISO 8529-1 :2001 , Reference neutron radiations – Part 1: Characteristics and methods of production. ISO 8529-2:2000, Reference neutron radiations – Part 2: Calibration fundamentals of radiation protection devices related to the basic quantities characterising the radiation field ISO 8529-3:1 998, Reference neutron radiations – Part 3: Calibration of area and personal dosemeters and determination of response as a function of energy and angle of incidence ISO 1 1 929:201 0, Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation – Fundamentals and application ISO 1 2789-1 :2008, Reference radiation fields – Simulated workplace neutron fields – Part 1: Characteristics and methods of production ISO 1 2789-2:2008, Reference radiation fields – Simulated workplace neutron fields – Part 2: Calibration fundamentals related to basic quantities 3 Terms and definitions, abbreviations and symbols, quantities and units 3.1 Terms and definitions For the purposes of this document, the following terms and definitions, as well as those given in IEC 60050-395 apply. NOTE For sentence clarity and text conciseness in this standard the term “neutron ambient dose equivalent (rate) meter” is abbreviated as “neutron dose (rate) meter”. Whenever the term “neutron dose (rate) meter” appears in this standard it is understood that “neutron ambient dose equivalent (rate) meter” is meant.
3.1 .1 1 influence quantity quantity that is not the measurand but that affects the result of the measurement Note 1 to entry: For example, temperature of a micrometer used to measure length. Note 2 to entry: If the effect on the result of a measurement of an influence quantity depends on another influence quantity, these influence quantities are treated as a single one. [SOURCE: IEC 60050-394:2007,394-40-27] 3.1 .1 2 influence quantity of type F influence quantity whose effect on the indicated value is a change in response Note 1 to entry: An example is radiation energy and angle of radiation incidence. Note 2 to entry: “F” stands for factor: The indication due to radiation is multiplied by a factor due to the influence quantity. 3.1 .1 3 influence quantity of type S influence quantity whose effect on the indicated value is a deviation independent of the indicated value Note 1 to entry: An example is the electromagnetic disturbance. Note 2 to entry: All requirements for influence quantities of type S are given with respect to the value of the deviation D . Note 3 to entry: “S” stands for sum. The indication is the sum of the indication due to radiation and due to the influence quantity, e.g., electromagnetic disturbance. 3.1 .1 4 lower limit of effective range of measurement H 0 or (퐻̇ 0 ) the lowest dose (rate) value included in the effective range of measurement