Nuclear Power Plants - Instrumentation Important to Safety - Radiation Monitoring for Accident and Post-accident Conditions - Part 1: General Requirements
1 Scope
This part of GB/T 12726 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 part is limited to equipment for continuous monitoring of radioactivity in accident and post-accident
conditions.
The object of this part 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.
This part 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 program of effluent monitoring, are not within the scope of this part.
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only the dated editions apply. For undated references, the latest editions (including any amendments) apply.
GB/T 2423.1-2008 Environmental Testing for Electric and Electronic Products — Part 2: Tests Methods — Tests A: Cold (IEC 60068-2-1:2007, IDT)
GB/T 2423.2-2008 Environmental Testing for Electric and Electronic Products — Part 2: Tests Methods — Tests B: Dry Heat (IEC 60068-2-2:2007, IDT)
GB/T 2423.3-2006 Environmental Testing for Electric and Electronic Products — Part 2: Tests Methods — Test Cab: Damp Heat Steady State (IEC 60068-2-78:2001, IDT)
GB/T 2423.4-2008 Environmental Testing for Electric and Electronic Products — Part 2: Tests Methods — Test Db: Damp Heat, Cyclic (12h+12h Cycle) (IEC 60068-2-30:2005, IDT)
GB/T 17626.4-2008 Electromagnetic Compatibility — Testing and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test (IEC 61000-4-4:2004, IDT)
GB/T 17626.5-2008 Electromagnetic Compatibility — Testing and Measurement Techniques — Surge Immunity Test (IEC 61000-4-5:2005, IDT)
GB/T 17626.8-2006 Electromagnetic Compatibility — Testing and Measurement Techniques — Power Frequency Magnetic Field Immunity Test (IEC 61000-4-8:2001, IDT)
GB/T 18272.1-2000 Industrial-process Measurement and Control — Evaluation of System Properties for the Purpose of System Assessment — Part 1: General Consideration and Methodology (IEC 61069-1:1991, IDT)
GB/T 20138-2006 Degrees of Protection Provided by Enclosures for Electrical Equipment Against External Mechanical Impacts (IK Code) (IEC 62262:2002, IDT)
NB/T 20029-2010 Nuclear Power Plants — Instrumentation and Control System Important to Safety — Plant-wide Radiation Monitoring (IEC 61504:2000, IDT)
ISO 2889:2010 Sampling Airborne Radioactive Materials From the Stacks and Ducts of Nuclear Facilities
IEC 60038:2002 IEC Standard Voltages
IEC 60068-2-6:2007 Environmental Testing — Part 2-6: Tests — Test Fc: Vibration (Sinusoidal)
IEC 60068-2-14:2009 Environmental Testing — Part 2-14: Tests — Test N: Change of Temperature
IEC 60529 Degrees of Protections Provided by Enclosures — IP Code
IEC 60780 Nuclear Power Plants — Electrical Equipment of the Safety System — Qualification
IEC 60880 Nuclear Power Plants — Instrumentation and Control System Important to Safety — Software Aspects for Computer-based System Performing Category A Functions
IEC 60980 Recommended Practices for Seismic Qualification of Electrical Equipment of the Safety System for Nuclear Generating Stations
IEC 60987 Nuclear Power Plants — Instrumentation and Control Important to Safety — Hardware Design Requirements for Computer-based Systems
IEC 61000-4-2:2008 Electromagnetic Compatibility (EMC) — Part 4-2: Testing and Measurement Techniques — Electrostatic Discharge Immunity Test
IEC 61000-4-3:2006 Electromagnetic Compatibility (EMC) — Part 4-3: Testing and Measurement Techniques — Radiated, Radio-frequency, Electromagnetic Field Immunity Test
IEC 61000-4-6:2008 Electromagnetic Compatibility (EMC) — Part 4-6: Testing and Measurement Techniques — Immunity to Conducted Disturbances, induced by Radio-frequency Fields
IEC 61000-4-18:2006 Electromagnetic Compatibility (EMC) — Part 4-18: Testing and Measurement Techniques — Damped Oscillatory Wave Immunity Test
IEC 61000-6-4:2006 Electromagnetic Compatibility (EMC) — Part 6-4: Generic Standards — Emission Standard for Industrial Environments
IEC 61226 Nuclear Power Plants — Instrumentation and Control Systems Important to Safety — Classification of Instrumentation and Control Functions
IEC 61559-2:2002 Radiation in Nuclear Facilities — Centralized Systems for Continuous Monitoring of Radiation and/or Levels of Radioactivity — Part 2: Requirements for Discharge, environmental, Accident, or Post-accident Monitoring Functions
IEC 62138 Nuclear Power Plants — Instrumentation and Control System Important to Safety — Software Aspects for Computer-based System Performing Category B or C Functions
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.
3.2
Accident conditions
Deviations from normal operation more severe than anticipated operational occurrences, including design basis accidents and severe accidents.
3.3
Aerodynamic equivalent diameter
Foreword II
Introduction V
1 Scope
2 Normative References
3 Terms and Definitions
4 Design Principles
4.1 Basic requirements related to functions
4.2 Measurement range
4.3 Energy response
4.4 Minimum detectable activity (or limit of detection)
4.5 Precision (or repeatability)
4.6 Accuracy (or relative error)
4.7 Measurement time
4.8 Response time
4.9 Overload performance
4.10 Ambient background shielding or compensation devices
4.11 Requirements related to accident conditions
4.12 Reliability
4.13 User interface
4.14 System testing, maintenance facilities and ease of decontamination
4.15 Electromagnetic interference
4.16 Power supplies
4.17 Interfaces
4.18 Sampling assembly
4.19 Quality
4.20 Type test report and certificate
5 Functional Testing
5.1 General
5.2 General test procedures
5.3 Performance characteristics
5.4 Electrical performance tests
5.5 Environmental performance test
Bibliography
Table 1 Standards of SAC/TC 30/SC 2/SC 3 VI
Table 2 Reference Conditions and Standard Test Conditions
Table 3 Tests Performed Under Standard Test Conditions
Table 4 Tests Performed with Variation of Influence Quantities
