BS IEC 61584:2001 pdf free download

BS IEC 61584:2001 pdf free download Radiation protection instrumentation — Installed, portable or transportable assemblies — Measurement of air kerma direction and air kerma rate
1.3.20 manufacturer
designer of the equipment
1.3.21 purchaser
user of the equipment
2 Design requirements
2.1 General characteristics
2.1 .1 Equipment may be designed as a single assembly with the detection sub-assembly adjacent to or contained within the assembly, or with the detection sub-assembly remote from the remaining equipment. In the latter case, the detection sub-assembly may be up to 1 0 m away from any electronics (head amplifiers) and the detection sub-assembly and any head amplifiers up to 1 00 m or more away from the indicator and alarm sub-assembly.
It may be desirable for all these options to be provided by a single basic design of equipment.
2.1 .2 The equipment shall measure the air kerma rate due to X or gamma rays over an energy range of at least 50 keV to 1 ,5 MeV. If the assembly is to be used in the area surrounding a nuclear reactor producing 8 MeV radiation it will be necessary to determine the response up to this energy. Effective response to higher energies may be specified. The range of the equipment shall be at least three full decades of air kerma rate; five or more decades may be required in many applications. A minimum value of 1 00 µGy ? h –1 is desirable. Manual range switching should be avoided.
The equipment shall measure azimuth angles from 0° to 360° and elevation angles from 0° to ±1 80° of X and gamma beams of this energy range, incident on the detection sub-assembly.
It shall also measure the attenuation coefficient in a given medium of X and gamma beams of the same energy range incident on the detection sub-assembly.
It shall give the estimate of the effective X and gamma energy incident on the detection subassembly.
Certain characteristics of the assembly such as, for example, the location of signal processing electronics in proximity to the detector in certain directions, may shield the detector causing a cone of reduced response. In this case, the reduced response cone shall be identified by the manufacturer.
2.1 .3 Assemblies shall be designed so as to limit as far as possible any undesirable response to electromagnetic and ionizing radiations other than X or gamma radiation.
2.1 .4 Where detectors are to be used in high neutron radiation fields, the detector subassembly shall be constructed of materials which will minimize the effects of neutron activation.
2.1 .5 Information regarding the reference point of the detection sub-assembly for calibration purposes shall be indicated on the outer surface. The orientation of the equipment relative to the reference calibration direction shall be given in relation to the equipment enclosure.