IEC 61468:2000
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Nuclear power plants - In-core instrumentation - Characteristics and test methods of self-powered neutron detectors
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31-12-2021
21-03-2000
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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 the art of SPNDs on Russian
designed reactors (VVER and RBMK)
Applies to in-core neutron detectors and instrumentation, which are designed for purposes important to safety, such as protection, control and information. Gives requirements, recommendations and guidance on selection of the type and characteristics of self powered neutron detectors used in different possible applications.
| DevelopmentNote |
Stability Date: 2018. (09/2017)
|
| DocumentType |
Standard
|
| Pages |
112
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| BS IEC 61468:2000 | Identical |
| NEN IEC 61468 : 2001 AMD 1 2004 | Identical |
| BS IEC 60515:2007 | Nuclear power plants. Instrumentation important to safety. Radiation detectors. Characteristics and test methods |
| 04/30078159 DC : DRAFT JUN 2004 | |
| 05/30117679 DC : DRAFT AUG 2005 | |
| BS IEC 60568:2006 | Nuclear power plants. Instrumentation important to safety. In-core instrumentation for neutron fluence rate (flux) measurements in power reactors |
| CEI 45-33 : 2009 | NUCLEAR POWER PLANTS - INSTRUMENTATION IMPORTANT TO SAFETY - IN-CORE INSTRUMENTATION FOR NEUTRON FLUENCE RATE (FLUX) MEASUREMENTS IN POWER REACTORS |
| IEC 60515:2007 | Nuclear power plants - Instrumentation important to safety - Radiation detectors - Characteristics and test methods |
| IEC 60568:2006 | Nuclear power plants - Instrumentation important to safety - In-core instrumentation for neutron fluence rate (flux) measurements in power reactors |
| 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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