IEC 62303:2008

FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Classification of tritium monitoring equipment
   4.1 General design considerations
   4.2 Methods of detection
   4.3 Ease of decontamination
   4.4 Considerations for explosive mixtures
   4.5 Corrosion resistance
   4.6 Reliability
   4.7 Capability of operational testing
   4.8 Adjustment and maintenance facilities
   4.9 Acoustic noise level of the assembly
   4.10 Electromagnetic interference
   4.11 Mechanical shock
   4.12 Measurement characteristics
   4.13 Measurement range
5 Equipment components
   5.1 General
   5.2 Sampling assembly
   5.3 Detection assembly
   5.4 Control assembly
   5.5 Indication facilities
   5.6 Alarm assembly
   5.7 Check source
   5.8 Ambient background shielding or compensation devices
   5.9 Batteries
6 Test conditions
   6.1 General test procedures
   6.2 Tests performed under standard test conditions for
        normal operation condition
   6.3 Tests performed with variation of influence quantities
   6.4 Tests performed under test conditions for emergency
        conditions
   6.5 Types of sources
   6.6 Metrological confirmation system during tests
7 Radiation detection tests
   7.1 General
   7.2 Reference response
   7.3 Linearity
   7.4 Response to other chemical forms of tritium
   7.5 Response to radioactive gases other than tritium
   7.6 Response time
   7.7 Response to ambient gamma radiation
   7.8 Response to neutron radiation
   7.9 Overload test
   7.10 Repeatability
   7.11 Stability of background indication
   7.12 Reproducibility of the indication
8 Electrical and mechanical tests
   8.1 Alarm trip range
   8.2 Alarm trip stability
   8.3 Equipment fault alarms
   8.4 Warm-up time - detection and measurement assembly
   8.5 Power supply variations
   8.6 Battery test
   8.7 Power supply transient effects
9 Air circuit performance test
   9.1 General
   9.2 Susceptibility to gaseous retention
   9.3 Accuracy of the volume and flow rate measurement
   9.4 Flow rate stability
   9.5 Effect of filter pressure drop
   9.6 Effect of power supply voltage on the flow rate
   9.7 Effect of power supply frequency on flow rate
10 Environmental performance tests
   10.1 Ambient temperature
   10.2 Temperature shock
   10.3 Relative humidity
   10.4 Atmospheric pressure
   10.5 Sealing
   10.6 Mechanical shock
   10.7 External electromagnetic immunity and electrostatic
        discharge
   10.8 Electromagnetic emission
11 Type test report and certificate
12 Operation and maintenance manual
Annex A (informative) General information on conditions of
                      operation
Annex B (informative) Preparation of tritiated radioactive
                      reference sources

IEC 62303:2008 is applicable to equipment used for sampling and continuous measurement of tritium in the workplace, in gaseous effluents discharged into the environment as well as in the environment itself and it is applicable to installed, portable and transportable equipment. The object is to establish mandatory general requirements and to present examples of acceptable methods and equipment for continuously monitoring and/or sampling airborne tritium. Complements IEC 60761-5.