IEC 60768:2009

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 detection limit)
  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 incident 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 In-line detectors mechanical features
       4.18.1 General requirements
       4.18.2 Pressure-containing parts
       4.18.3 Materials
       4.18.4 Verification of material processing
  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 Accuracy (relative error)
       5.3.3 Response to other artificial radionuclides
       5.3.4 Response to background radiation
       5.3.5 Precision (or repeatability)
       5.3.6 Stability of the indication
       5.3.7 Response time
       5.3.8 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
              ambient and stream conditions
       5.5.4 Electromagnetic compatibility
Bibliography

IEC 60768:2009 provides criteria for the design, selection, testing, calibration and functional location of equipment for the monitoring of radioactive substances within plant-process streams during normal operation conditions and anticipated operational occurrences. Is only applicable to continuous in-line or on-line measurement. This new edition includes the following significant technical changes with respect to the previous edition:
- it clarifies the definitions;
- up-dates the reference to new standards published since the first issue;
- updates the units of radiation.

This publication is to be read in conjunction with IEC 60951-1:2009, IEC 60951-2:2009, IEC 60951-3:2009 and IEC 60951-4:2009.