IEEE N42.26-1996 pdf download Radiation Protection instrumentationMonitoring Equipment-Personal Warning Devices for X and Gamma Radiations
1 Scope and object
This international Standard applies to audible or audibie and visual warning devices whichare worn by personnel.
it applies to devices used to give an indication of personal dose equivalent rate, from Xand gamma radiations with energies from 60 keV to 1,5 MeV namely H(10), If the deviceis to be used for photon energies up to 10 MeV, for example at a nuclear facility where6 MeV photon radiation is present, it will be necessary to determine the response at theappropriate energy.
This standard specifies, for the device described above, general characteristics, radiationand environmental characteristics, as well as general test procedures, electrica! andmechanical safety requirements.
A device designed to meet this standard may not be suitable for use in puised radiationfieids.
This standard does not apply to warning devices detecting neutron or beta radiatlons.
The purpose of this standard is to specify the design requirements and performancecharacteristics of personal warning devices used to give an audible or audible and visuatindications related to dose equivalent rate from strongly penetrating radiations (as definedin ICRU Report 47).
2 Normative references
The following normative documents contain provisions which, through reterence in thistext, constitute provisions of this international Standard. At the time of publicatlon, theeditions indicated were valid. All normative documents are subject to revision, and partiesto agreements based on this international Standard are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicatedbelow. Members of IEC and ISO maintain register of currently valid lnternational Standard.
IEC 50(151): 1978,Interational Electrotechnical Vocabulary (IEV) – Chapter 151: Elec.trical and magnetic devices
IEC 50(393): 1996,Internatlonal Electrotechnicai Vocabulary (iEV) – Chapter 393: Nuciearinstrumentation: Physical phenomena and basic concepts
IEC 50(394): 1995,international Electrotechnica/ Vocabulary (1EV) – Chapter 394: Nuciearinstrumentation: instruments
ISO/DIS 4037-1, X and gamma reference radiations for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy – Part 1:Characteristics of the radiations and their methods of production(Revision of ISO 4037: 1979)
ISO/DIS 4037-2,X and gamma reference radiations for calibrating dosemeters anddoserate meters and for determining their response as a function of photon energy -Part 2: Dosimetry of X and gamma reference radiations for radiation protection over theenergy range from 8 keV to 1.3 MeV and from 4 MeV to 9 MeV
SO 8529: 1989Neutron reference radiations for calibratina neutron-measurina devicesused for radiation protection purposes and for determining their response as a function ofneutron energy
ICRU Report 47: 1992, Measurement of dose equivalent from external photon and electronradiations
3 Terminology
3.1 Definitions
For the purpose of this international Standard, the following definitions apply. Othertechnical terms are defined in IEC 50(393), IEC 50(394) and iEC 359.
3.1.1 conventional true value of a quantlty: Best estimate of the value determined bya primary or secondary standard, or by a reference instrument that has been calibratedagainst a primary or secondary standard.
3.1.2 indicated value: Repetitlon rate of an audible or visual signal, which is propor.
tional to personal dose equivalent rate H.(10).