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[email protected]. IEC >IEEE IEC 63147 Edition 1.02017-12 INTERNATIONAL IEEE Std 497TM STANDARD Criteria for accident monitoring instrumentation for nuclear power generating stations INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 27.120.20 ISBN 978-2-8322-5031-0 Warning! Make sure that you obtained this publication from an authorized distributor. ? Registered trademark of the International Electrotechnical Commission