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IEC 61226 : 3.0

IEC 61226 : 3.0

NUCLEAR POWER PLANTS - INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY - CLASSIFICATION OF INSTRUMENTATION AND CONTROL FUNCTIONS

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 Abbreviations<br>5 Classification scheme<br>&nbsp;&nbsp;5.1 General<br>&nbsp;&nbsp;5.2 Background<br>&nbsp;&nbsp;5.3 Description of categories<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.2 Category A<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.3 Category B<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.4 Category C<br>&nbsp;&nbsp;5.4 Assignment criteria<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.2 Category A<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.3 Category B<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.4 Category C<br>6 Classification procedure<br>&nbsp;&nbsp;6.1 General<br>&nbsp;&nbsp;6.2 Identification of design basis<br>&nbsp;&nbsp;6.3 Identification and classification of functions<br>7 Assignment of technical requirements to categories<br>&nbsp;&nbsp;7.1 General requirements<br>&nbsp;&nbsp;7.2 Requirements related to functions<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.2.1 Basic requirements<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.2.2 Specific requirements<br>&nbsp;&nbsp;7.3 Requirements related to I&C systems<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3.1 Basic requirements<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3.2 Specific requirements<br>&nbsp;&nbsp;7.4 Requirements related to equipment<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.4.1 Basic requirements<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.4.2 Specific requirements<br>&nbsp;&nbsp;7.5 Requirements related to quality aspects<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.1 Basic requirements<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.2 Specific requirements<br>Annex A (informative) Examples of categories<br>Bibliography

Abstract

Describes a method of classification of the information and command functions for nuclear power plants, and the I&C systems and equipment that provide those functions, into categories that designate the importance to safety of the function.

General Product Information

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

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