IEC 60846 pdf download

IEC 60846 pdf download,Radiation protection instrumentation – Ambient and/or directional dose equivalent (rate) meters and/or monitors for beta, X and gamma radiation
1 Scope and object
This International Standard applies to dose equivalent (rate) meters and/or monitors for the measurement of ambient dose equivalent (rate) and/or directional dose equivalent (rate) from external beta, X and gamma radiation, as recommended in ICRU Report 47 1 . NOTE 1 If both quantities, ambient dose equivalent and directional dose equivalent are meant, the term dose equivalent may be used as an abbreviation. It applies directly to dose equivalent (rate) meters intended for the determination of the dose equivalent or dose equivalent rate from external beta and/or X and gamma radiation of energies up to 10 MeV for radiation protection purposes. In this document, the expression “dose equivalent (rate)” is used when the provisions apply to both the measurement of dose equivalent and the measurement of dose equivalent rate. NOTE 2 It does not apply to medical radiology which is within the scope of technical committee 62, where the conditions of radiation exposure may be extremely inhomogeneous, but precisely known. NOTE 3 It does not apply directly to instruments intended to be worn by an individual for the purpose of estimating the radiation dose received by that individual. The object of this standard is to specify the design requirements and the performance characteristics of dose equivalent (rate) meters intended for the determination of ambient dose equivalent (rate) and directional dose equivalent (rate) as defined in ICRU Report 47 1 . Accordingly, this standard specifies: a) general characteristics, the functions and performance characteristics of dose equivalent (rate) meters; b) the methods of test to be used to determine compliance with the requirements of this standard.
3 Terminology
3.1 General Except as specified below, all technical terms are as defined in IEC 60050, particularly for radiation quantities and dosimetric terms in IEC 60050-393 and IEC 60050-394. For the purpose of this International Standard, the following definitions apply. 3.2 Definitions 3.2.1 conventionally true value of dose equivalent (rate) the best estimate of the true dose equivalent (rate) used for the calibration of equipment. This value and its uncertainty are determined from a secondary or a primary standard, or by a reference instrument which has been calibrated against a secondary or primary standard. 3.2.2 error of indication of a dose equivalent (rate) meter difference between the indicated value of dose equivalent (rate), H i , and the conventionally true value of that quantity, H t , at the point of measurement. It is expressed as H i – H t.3.2.7 reference point of a dose equivalent (rate) meter physical mark or marks on the outside of the dose equivalent (rate) meter used to position it at the point of measurement or the point of test 3.2.8 point of test of a dose equivalent (rate) meter point at which the conventionally true value is determined and at which the reference point of the dose equivalent (rate) meter is placed for calibration and test purposes 3.2.9 effective range of measurement of a dose equivalent (rate) meter range of values of the quantity to be measured over which the performance of a dose equivalent (rate) meter meets the requirements of this standard 3.2.10 rated range of a dose equivalent (rate) meter range of values of an influence quantity or instrument parameter within which the dose equivalent (rate) meter will operate within the limits of variation. Its limits are the maximum and minimum rated values. 3.2.11 minimum rated range of a dose equivalent (rate) meter least range of an influence quantity or instrument parameter being specified over which the dose equivalent (rate) meter shall operate within the specified limits of variation in order to comply with this standard 3.2.12 standard test values a value, values, or range of values of an influence quantity or instrument parameter, which are permitted when carrying out calibrations or tests on another influence quantity or instrument parameter NOTE Under standard test conditions, influence quantities and instrument parameters have their standard test values.