IEC 62385 : 1.0

NUCLEAR POWER PLANTS - INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY - METHODS FOR ASSESSING THE PERFORMANCE OF SAFETY SYSTEM INSTRUMENT CHANNELS

International Electrotechnical Committee

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FOREWORD INTRODUCTION 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements for performance verification of process   instruments   4.1 Background   4.2 General requirements   4.3 Testing environment   4.4 Test interval   4.5 Test location   4.6 Calibration of measurement and test equipment   4.7 Test results   4.8 Validation of test methods   4.9 Qualifications of test personnel 5 Acceptable means for instrument performance verification   5.1 Introduction   5.2 Calibration   5.3 Channel checks   5.4 Functional test   5.5 Response time testing 6 Methods to verify instrument calibration   6.1 General considerations   6.2 Cross-calibration (cross-validation) method   6.3 On-line calibration monitoring       6.3.1 Introduction       6.3.2 Principle of on-line calibration monitoring       6.3.3 Data acquisition requirements       6.3.4 Data qualification and data analysis requirements       6.3.5 Accounting for common mode drift       6.3.6 Data collection frequency 7 Methods for response time testing   7.1 Response time testing of pressure transmitters       7.1.1 Ramp test       7.1.2 Noise analysis technique       7.1.3 Power interrupt (PI) test   7.2 Response time testing of temperature sensors       7.2.1 Plunge test       7.2.2 LCSR test       7.2.3 Self-heating test       7.2.4 Noise analysis 8 On-line detection of blockages and voids in pressure   sensing lines 9 Verifying the performance of neutron detectors Annex A (informative) RTD cross-calibration/cross-validation Annex B (informative) On-line calibration monitoring Annex C (informative) Response time testing techniques for                       pressure transmitters and neutron detectors Annex D (informative) Response time testing techniques for RTDs Bibliography

Abstract

Defines the requirements for demonstrating acceptable performance of safety system instrument channels through response time testing, calibration verification, and other means.