IEC 60951-1:2009

FOREWORD
INTRODUCTION
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
       4.13.1 General
       4.13.2 Display of measured value
       4.13.3 Alarms
       4.13.4 Status indication
       4.13.5 Local indications
  4.14 System testing, maintenance facilities and ease of
       decontamination
       4.14.1 System testing
       4.14.2 Maintenance facilities
       4.14.3 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
       5.2.1 General
       5.2.2 Tests performed under standard test conditions
       5.2.3 Tests performed with variation of influence
              quantities
       5.2.4 Calculations and/or numerical simulations
       5.2.5 Reference sources
       5.2.6 Statistical fluctuations
  5.3 Performance characteristics
       5.3.1 Reference response
       5.3.2 Sensitivity and relative response for solid
              sources
       5.3.3 Accuracy (relative error)
       5.3.4 Response to other artificial radionuclides
       5.3.5 Response to background radiation
       5.3.6 Precision (or repeatability)
       5.3.7 Stability of the indication
       5.3.8 Response time
       5.3.9 Overload test
  5.4 Electrical performance tests
       5.4.1 Alarm trip range
       5.4.2 Alarm trip stability
       5.4.3 Fault alarm
       5.4.4 Status indication and fault alarm tests
       5.4.5 Warm-up time - Detection and measuring assembly
       5.4.6 Influence of supply variations
       5.4.7 Short circuit withstand tests
  5.5 Environmental performance test
       5.5.1 Stability of performance after storage
       5.5.2 Mechanical tests
       5.5.3 Stability of performance with variation of
              temperature and humidity
       5.5.4 Electromagnetic compatibility
Bibliography

IEC 60951-1:2009 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. It specifies the general characteristics, general test procedures, radiation, electrical, safety and environmental characteristics and the identification and certification of the equipment. The main technical changes with regard to the previous edition are as follows:
- clarify the definitions;
- up-date the references to new standards published since the first edition;
- update the units of radiation.