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IEC 61226:2009 ED3

Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions

Publication date:   Jul 8, 2009

General information

99.60 Withdrawal effective   Apr 29, 2020

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IEC

TC 45/SC 45A

International Standard

27.120.20   Nuclear power plants. Safety

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Scope

IEC 61226:2009 establishes a method of classification of the information and command functions for nuclear power plants, and the instrumentation and control systems and equipment that provide those functions, into categories that designate the importance to safety of the function. The resulting classification then determines relevant design criteria. Is applicable to all the information and command functions and the instrumentation and control systems and equipment that provide those functions. The main changes with respect to the previous edition are listed below:
- to introduce a definition for "non-hazardous stable state";
- to clarify limits of categories;
- to clarify requirements related to equipment used for beyond design events.

Life cycle

PREVIOUSLY

WITHDRAWN
IEC 61226:2005 ED2

NOW

WITHDRAWN
IEC 61226:2009 ED3
99.60 Withdrawal effective
Apr 29, 2020

REVISED BY

PUBLISHED
IEC 61226:2020 ED4