BS EN 61005:2004 pdf free.Radiation protectionin strumentation—Neutron ambient dosee quivalent (rate) meters.
BS EN 61005 This International Standard is applicable to all assemblies designed to measure the ambientdose equivalent (rate) due to neutron radiation of energy up to 16 MeV,and which compriseat least:
a) a detection assembly, which may, for example, consist of a detector probe for thermalised neutrons and an arrangement of moderating and absorbing media surrounding thedetector;
b) a measuring assembly with a display for the measuring result, which may be incorporated into a single assembly or connected by means of a flexible cable.
The requirements given below pertain to assemblies as defined in the first paragraph. lt isacceptable,however，to use assemblies,which do not meet the requirements below whensuch requirements are not deemed essential for a given purpose. In such cases,therequirements to be applied to the assemblies should be specified by agreement between themanufacturer and the purchaser,but the methods of determination of the characteristics ofthe assemblies should conform to this standard.
No tests are specified in this standard for the performance requirements of the assemblies inpulsed radiation fields,and it is to be considered that an assembly designed to meet thisstandard may not be suitable for use in such fields.
The object of this standard is to specify requirements for the performance characteristics ofneutron ambient dose equivalent (rate) meters, and to prescribe the methods of testing inorder to determine compliance with this standard.This standard specifies, for the assembliesdescribed in the first paragraph，general characteristics，general test procedures, radiationcharacteristics,electrical, mechanical, safety and environmental characteristics,and also theidentification certificate.Requirements and test procedures are also specified for the alarmperformance of the dose equivalent (rate) meters, which are equipped with alarm provisions.
NOTE Dose equivalent (rate) meters for neutrons have an energy dependence of ambient dose equivalentresponse,which may deviate considerably from unity. The response in realistic spectra encountered in workplacefields is such that the deviations in different energy ranges tend to neutralise each other.Consequently, theresponse in realistic fields is generally much closer to unity.
ISO 12789 specifies a list of appropriate neutron sources having broad spectra suitable for the testing of such(rate) meters. Also work places may be specified by agreement between manufacturer and purchaser to beappropriate for testing when the spectral environment is well defined.
Unconventional dose equivalent ratemeters, for example consisting of more than one detector probe, have recentlybecome available.For such instruments, evaluation based on mono-energetic neutrons is not relevant. Also forthose ratemeters, the above considerations may apply.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.BS EN 61005 pdf download.