1983_scan.pdf

-=Reproduced By GLOBAL-ENGINEERING DOCUMENTS With The Permission Of ASME z Under Royalty Agreement SUPERSEDED-AMERICAN NATIONAL STANDARD Functional QuaIif ication Requirements for Power Operated Active Valve Assemblies for Nuclear Power Plants ANSI 816.41-1983 PUBLISHED B Y T H E A M E R I C A N S O C I E T Y O F M E C H A N I C A L E N G I N E E R S United Engineering Center 345 East 47th Street New York,N.Y.10017 Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=sharabiani,shahramfsNot for Resale,04/17/2014 13:40:36 MDTNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance:July 15.1983 This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate.The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry,academia,regulatory agen-cies,and the public-at-large.ASME does not approve,rate,or endorse any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in rhis document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent,nor assume any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibilitv.Participation by federal agency representative(s1 or person(s1 affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise.without the prior written permission of the publisher.Copyright 01983 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Resewed Printed in U.S.A.Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=sharabiani,shahramfsNot for Resale,04/17/2014 13:40:36 MDTNo reproduction or networking permitted without license from IHS-,-,-FOREWORD(This Foreword is not a part of American National Standard,Functional Qualifications Requirements for Power Operated Active Valve Assemblies for Nuclear Power Plants,ANSI 816.41.)This Standard is one of a series of power plant equipment standards provided to assure that equipment will function as specified.The Standard was developed under sponsorship of the American Society of Mechanical Engineers(ASME).Its development was initiated by the American National Standards Committee N45 on Reactor Plants and Their Maintenance.In October,1972,the N4S Committee established a task force to pre-pare a series of standards to assure that valves would function as specified.In 1974,the task force was reas-signed to American National Standards Committee B16 and designated Subcommittee H.Power operated active valve assemblies are required to perform their functions under specified operating conditions.It is the purpose of the series of standards on active valves to provide requirements for:(1)the preparation of Functional Specificatiom;(2)the qualification of the design of valves,actuators,and the combination thereof(valve assemblies)by test and analysis for the intended service;and(3)production testing of valve assemblies manufactured for specific applications.The purpose of the foregoing is to provide assurance that the valve assemblies in s e c e will function as required under all specified operating conditions.Only those conditions,considered to uniquely affect the operability of valve-actuator combination(as opposed to either the valve or actuator alone)are developed within ANSI B16.41.Integrity of the pressure retaining boundary of the valve,covered by codes developed by the ASME Boiler and Pressure Vessel Committee,is excluded from the scope of this Standard.The first standard to be issued in the series is ANSI N278.1-1975,which covers the preparation of Func-tional Specifications.This Standard provides a method for qualification of power operated active valve assemblies that will provide an acceptable level of assurance of functional operability.This qualification is based on tests demonstrating the ability of the valve assembly to perform its function under extreme adverse conditions of pressure,mechanical loading,flow dynamics,temperature,and vibration.The testing involves imposition of certain of these condi-tions in combination,and others individually,all exceeding maximum levels expected in service.It is recognized that in the extremity of certain adverse plant events involving need for valv