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BS IEC 61468:2000
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Nuclear power plants. In-core instrumentation. Characteristics and test methods of self-powered neutron detectors
Hardcopy , PDF
07-05-2021
English
09-09-2004
FOREWORD
1 Scope and object
2 Normative references
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Self-powered neutron detectors - General
characteristics
5 Mechanical structure and characteristics
6 Nuclear and electrical characteristics
7 Application recommendations
7.1 Fluence rate mapping - core monitoring and
surveillance
7.2 Feedback control
7.3 Core protection
7.4 Classification
8 Design recommendations
8.1 Background noise
8.2 Time response
8.3 Lifetime
8.4 Mechanical design and electrical connection
9 Test methods
9.1 Prototype testing
9.2 Production tests
10 Detector calibration
10.1 Absolute calibration
10.2 Comparison calibration
10.3 In-core calibration
10.4 Calibration procedure
10.5 Recommended calibration periods
Annex A (informative) Self-powered detector principles
A.1 SPND response mechanisms
A.1.1 - Beta decay (delayed response)
A.1.2 - Neutron capture (prompt response)
A.1.3 - Photoelectric effect (prompt response)
A.1.4 - Compton effect (prompt response)
A.2 Nature of SPND response
A.2.1 - Thermal neutron interactions
A.2.2 - Gamma interactions
A.3 Detector burn-up life
A.4 Self-powered detector operating characteristics
A.4.1 - Vanadium emitter characteristics
A.4.2 - Cobalt emitter characteristics
A.4.3 - Rhodium emitter characteristics
A.4.4 - Silver emitter characteristics
A.4.5 - Platinum emitter characteristics
A.4.6 - Hafnia emitter characteristics
A.5 Self-powered detector assemblies
A.5.1 - Light water reactor self-powered
detector assemblies
A.5.2 - Typical heavy water reactor self-powered
detector assembly
Annex B (informative) State of art of SPNDs on Russian designed
reactors (VVER and RBMK)
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