BS IEC 61468:2000
Superseded
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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
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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)
Applicable to in-core neutron detectors and instrumentation, designed for purposes that are important to safety, such as protection, control and information. Gives recommendations, requirements and guidance on selection of the type and characteristics of self powered neutron detectors which are used in different possible applications.
| Committee |
NCE/8
|
| DevelopmentNote |
Supersedes 98/708241 DC and 02/708760 DC. (09/2004) Reviewed and confirmed by BSI, September 2013. (08/2013)
|
| DocumentType |
Standard
|
| Pages |
44
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
Amendment 1
| Standards | Relationship |
| IEC 61468:2000 | Identical |
| IEC 60050-394:2007 | International Electrotechnical Vocabulary (IEV) - Part 394: Nuclear instrumentation - Instruments, systems, equipment and detectors |
| IEC 61226:2009 | Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions |
| IEC 60515:2007 | Nuclear power plants - Instrumentation important to safety - Radiation detectors - Characteristics and test methods |
| IEC 61513:2011 | Nuclear power plants - Instrumentation and control important to safety - General requirements for systems |
| IEC 60568:2006 | Nuclear power plants - Instrumentation important to safety - In-core instrumentation for neutron fluence rate (flux) measurements in power reactors |
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