BS IEC 60951-1 pdf download

BS IEC 60951-1 pdf download Nuclear power plants — Instrumentation important to safety — Radiation monitoring for accident and post-accident conditions — Part 1: General requirements
1 Scope
This part of IEC 60951 provides general guidance on the design principles and performance criteria for equipment to measure radiation and fluid (gaseous effluents or liquids) radioactivity levels at nuclear power plants during and after an accident.
This standard is limited to equipment for continuous monitoring of radioactivity in accident and post-accident conditions. The object of this standard is to lay down mandatory general requirements and give examples of acceptable methods for equipment for continuous monitoring of radioactivity within the plant during and after accident conditions in nuclear power plants using light water reactors.
It specifies, for the equipment described above, the general characteristics, general test procedures, radiation, electrical, safety and environmental characteristics and the identification and certification of the equipment.
If this equipment is part of a centralized system for continuous radiation monitoring in a nuclear facility, there may be additional requirements from other standards related to this system. Sample extraction and laboratory analysis, which are essential to a complete programme of effluent monitoring, are not within the scope of this standard.
2 Normative references
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 edition of the referenced document (including any amendments) applies.
IEC 60038:2002, IEC standard voltages
IEC 60068-2-1 :2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-1 4:2009, Environmental testing – Part 2-14: Tests. Test N: Change of temperature
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12 h + 12 h cycle)
IEC 60068-2-78:2001 , Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,steady state
IEC 60529: Degrees of protections provided by enclosures – IP code
IEC 60780, Nuclear power plants – Electrical equipment of the safety system – Qualification
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
acceptance test
contractual test to prove to the customer that the device fulfils certain specifications [IEV 394-40-05]
3.2
accident conditions
deviations from normal operation more severe than anticipated operational occurrences,including design basis accidents and severe accidents
[IAEA Safety Glossary, 2007 edition]
3.3
aerodynamic equivalent diameter
diameter of a unit-density sphere having the same gravitational settling velocity as the particle in question
[IEV 393-1 1 -41 ]
NOTE The aerodynamic equivalent diameter concerns particles with a diameter from 0,1 μm to 2 mm.