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IEC 60768 : 2.0

IEC 60768 : 2.0

NUCLEAR POWER PLANTS - INSTRUMENTATION IMPORTANT TO SAFETY - EQUIPMENT FOR CONTINUOUS IN-LINE OR ON-LINE MONITORING OF RADIOACTIVITY IN PROCESS STREAMS FOR NORMAL AND INCIDENT CONDITIONS

International Electrotechnical Committee

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Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Design principles<br>&nbsp;&nbsp;4.1 Basic requirements related to functions<br>&nbsp;&nbsp;4.2 Measurement range<br>&nbsp;&nbsp;4.3 Energy response<br>&nbsp;&nbsp;4.4 Minimum detectable activity (or detection limit)<br>&nbsp;&nbsp;4.5 Precision (or repeatability)<br>&nbsp;&nbsp;4.6 Accuracy (or relative error)<br>&nbsp;&nbsp;4.7 Measurement time<br>&nbsp;&nbsp;4.8 Response time<br>&nbsp;&nbsp;4.9 Overload performance<br>&nbsp;&nbsp;4.10 Ambient background shielding or compensation devices<br>&nbsp;&nbsp;4.11 Requirements related to incident conditions<br>&nbsp;&nbsp;4.12 Reliability<br>&nbsp;&nbsp;4.13 User interface<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.13.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.13.2 Display of measured value<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.13.3 Alarms<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.13.4 Status indication<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.13.5 Local indications<br>&nbsp;&nbsp;4.14 System testing, maintenance facilities and ease of<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;decontamination<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.14.1 System testing<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.14.2 Maintenance facilities<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.14.3 Ease of decontamination<br>&nbsp;&nbsp;4.15 Electromagnetic interference<br>&nbsp;&nbsp;4.16 Power supplies<br>&nbsp;&nbsp;4.17 Interfaces<br>&nbsp;&nbsp;4.18 In-line detectors mechanical features<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.18.1 General requirements<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.18.2 Pressure-containing parts<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.18.3 Materials<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.18.4 Verification of material processing<br>&nbsp;&nbsp;4.19 Quality<br>&nbsp;&nbsp;4.20 Type test report and certificate<br>5 Functional testing<br>&nbsp;&nbsp;5.1 General<br>&nbsp;&nbsp;5.2 General test procedures<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.2 Tests performed under standard test conditions<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.3 Tests performed with variation of influence <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;quantities<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.4 Calculations and/or numerical simulations<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.5 Reference sources<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.6 Statistical fluctuations<br>&nbsp;&nbsp;5.3 Performance characteristics<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.1 Reference response<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.2 Accuracy (relative error)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.3 Response to other artificial radionuclides<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.4 Response to background radiation<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.5 Precision (or repeatability)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.6 Stability of the indication<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.7 Response time<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.8 Overload test<br>&nbsp;&nbsp;5.4 Electrical performance tests<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.1 Alarm trip range<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.2 Alarm trip stability<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.3 Fault alarm<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.4 Status indication and fault alarm tests<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.5 Warm-up time - Detection and measuring assembly<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.6 Influence of supply variations<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.7 Short circuit withstand tests<br>&nbsp;&nbsp;5.5 Environmental performance test<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.1 Stability of performance after storage<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.2 Mechanical tests<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.3 Stability of performance with variation of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ambient and stream conditions<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.4 Electromagnetic compatibility<br>Bibliography

Abstract

Offers criteria for the design, selection, testing, calibration and functional location of equipment for the monitoring of radioactive substances within plant-process streams during normal operation conditions and anticipated operational occurrences.

General Product Information

Document Type Standard
Status Current
Publisher International Electrotechnical Committee
Committee TC 45

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