IEEE C37 82-1987 en The Qualification of Switchgear Assemblies for Class 1E Applications in Nuclear Power Generating Stations《核电站中1E级用开关设备组件的鉴定》.pdf

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1、ANSI/IEEEC37.82-1987(R2009)An American National StandardIEEE Standard for the Qualification of Switchgear Assemblies for Class 1E Applications in Nuclear Power Generating StationsSponsorSwitchgear Committeeof theIEEE Power Engineering SocietyApproved December 8, 1983Reaffirmed December 9, 2009IEEE-S

2、A Standards BoardApproved February 5, 1987Reaffirmed July 26, 1993American National Standards Institute Copyright 1987 byThe Institute of Electrical and Electronics Engineers, Inc345 East 47th Street, New York, NY 10017, USANo part of this publication may be reproduced in any form, in an electronic

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19、may be required by an IEEE standard or for conducting inquiries into the legal validity orscope of those patents that are brought to its attention.iiiForeword(This Foreword is not a part of ANSI/IEEE C37.82-1987, IEEE Standard for the Qualification of Switchgear Assemblies for Class1E Applications i

20、n Nuclear Power Generating Stations.)ANSI/IEEE Std 323-1984, IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations,was developed to provide qualification requirements for Class 1E (safety-related) electrical equipments that wouldconfirm the adequacy of such equipments

21、 to perform their safety functions on a continuing basis throughout theirinstalled life. This document is based on ANSI/IEEE Std 323-1983 and is intended to present specific qualificationprocedures for switchgear assemblies in Class 1E application.In approaching the task of developing a standard for

22、 these procedures, the authors noted that1) Standards for switchgear assemblies have been developed over a long period of time through the efforts ofIEEE, AEIC, EEI, NEMA, and other interested parties under the auspices of the American NationalStandards Institute (ANSI).2) The switchgear assembly pr

23、oducts that have been produced in accordance with these standards and that havebeen properly manufactured, applied, handled, installed, operated, and maintained, have had long andsuccessful performance records.3) Because switchgear assemblies are protective equipments, the standards are conservative

24、 and provide amplemargin with respect to normal application. Design and application also tend to be conservative.4) The application of switchgear assemblies is always outside the containment in a nuclear power generatingstation. Normal service conditions are not severe. The only unusual requirements

25、 sometimes presented area) The need to meet safety-related performance demands during a design basis event (DBE) at any time, upto and including the end of a stipulated period known as the qualified life.b) Qualification to the requirements of the DBE, which is usually a specified seismic event but

26、may includesevere environmental conditions for stipulated periods of time subsequent to the seismic and other DBE.5) Switchgear assemblies are not cataloged “off-the-shelf” items as are motors, valves, pumps, etc. They arebuilt from standardized components and subassemblies but in varied arrangement

27、s to satisfy the needs ofdifferent applications. The complements of devices such as relays, etc, are rarely the same from assembly toassembly and are subject to modification during production and even after installation.In order to precisely define the task, it is important to understand what is mea

28、nt by qualification. As described inANSI/IEEE Std 323-1983, qualification is only one part of an overall quality assurance program that includes design,qualification, production quality control, installation, maintenance, and periodic testing. The overall program isrequired to assure that the equipm

29、ent will meet or exceed its performance requirements throughout its installed life.Qualification is that part that establishes the capability of the equipment to meet such requirements. Put another way,the qualification procedure must establish that the equipment can; the overall program is required

30、 to assure that it will.Qualification programs should identify design and material characteristics that, after a period of time and during aDBE, may precipitate common failure modes due to aging of redundant equipment. The concept of aging must beincluded in the qualification procedure in order to i

31、nvestigate the possibility that aging degradation might be the sourceof common failure modes in redundant Class 1E equipments. In order to provide maximum assurance that theequipment can meet its safety-related performance requirements on a continuing basis throughout its installed life andfor the s

32、tipulated DBE, it may be necessary to limit the installed life or establish a maintenance program forreplacement of some components whose qualified life is shorter than the desired qualified life for the total equipment.Based on the foregoing considerations, the authors of this document have develop

33、ed a standard that is in accordancewith the combined qualification procedure, as described in 5.4 of ANSI/IEEE Std 323-1983. The details of thisprocedure are covered in Section 7 of this document. Basically, it consists of using the standard design tests asprescribed by industry standards to establi

34、sh the capability of the equipment in an “as new” condition, and tosupplement this with tests and other data on critical components and materials to evaluate long-term performance.Analysis is used to determine the performance requirements, identify the critical components and materials, and relateiv

35、the aging data to the performance requirements in order to project a qualified life for the total assembly. Note that thisapproach to qualification provides the necessary flexibility to respond to the variations and modifications that arecharacteristic of switchgear assemblies.Tests on complete asse

36、mblies have been used in this qualification procedure when it could be reasoned that theinterrelationship of components in the complete assembly was important for realistic test results. Examples are thedielectric, continuous current, and short-circuit current tests required by industry standards, a

37、nd the seismic testsrequired by ANSI/IEEE Std 344-1975, IEEE Recommended Practices for Seismic Qualification of Class 1EEquipment for Nuclear Power Generating Stations.However, the authors reasoned that accelerated aging tests (particularly thermal aging) in a complete assembly wouldnot provide vali

38、d results. Many materials and components respond differently, relatively speaking, to accelerated agingthan they do to natural aging. This changes the interrelationships and may produce unrealistic test results whenaccelerated aging is attempted on combinations of materials. Therefore, this standard

39、 requires aging data only forcomponents and materials, rather than for complete assemblies.It should be noted that this approach makes it desirable to define margin as the difference between demonstratedcapability and required capability. The capability of switchgear assemblies is demonstrated by th

40、e design testsprescribed by relevant industry standards that show that the assemblies meet the ratings required by those standards.Because the equipment is rarely, if ever, applied up to its full rating, it is usually possible to show ample margin evenwhen the equipment has aged. The usual service c

41、onditions defined in 4.1 of this standard are consistent withapplication practices for Class 1E assemblies in nuclear power generating stations and, hence, ensure margin for suchapplications. They are not derating factors.Note that the end result of the qualification procedure is the projection of a

42、 qualified life for the switchgear assembly.There must be adequate documentation to support the projection.The realization of the projected qualified life requires a joint effort by the manufacturer and the user. The manufactureris responsible for the design and production of the equipment. In order

43、 to support the qualification of the equipment,he must provide and maintain documentation showing that it is capable of meeting specified performancerequirements in specified service conditions throughout its qualified life. The documentation must also show that theequipment is capable of performing

44、 its safety function during and, if required, for a specified time after exposure to aDBE, which might occur at any time during the life of the equipment. In order to satisfy this latter requirement, themanufacturer must provide documentation relative to the long-term performance of components and m

45、aterials that arecritical with respect to the capability of performing the safety function. The manufacturer must provide guidance onthe proper application, handling, storage, installation, and maintenance of the equipment. The maintenance guidancemust include identification of components and materi

46、als whose long-term characteristics are not adequate, so that areplacement program can be developed.The user is responsible for identification of the Class 1E equipment and components specifically requested by him. Hemust specify service conditions and performance requirements that are safety-relate

47、d. He is responsible for properapplication, handling, storage, installation, and maintenance in accordance with the guidance provided by themanufacturer. Proper application includes the maintaining of a generally favorable service environment thatcontributes greatly to successful long-term performan

48、ce. A favorable service environment is defined by the usualservice conditions listed in 4.1 of this standard.vThe personnel of the IEEE Working Group of the Switchgear Assemblies Subcommittee, IEEE SwitchgearCommittee, who developed this standard were:M. V. Boyle, Chair C. E. Kunkel, Vice Chair A. P

49、. ColaiacoJ. L. CrenshawR. P. EhasD. K. KellyP. L. KolarikW. LaudanG. O. PerkinsS. H. TelanderThe personnel of the IEEE Switchgear Assemblies Subcommittee who reviewed and approved this standard were:S. C. Atkinson, Chair A. K. AlsakerC. G. BurlandR. CarsonA. P. ColaiacoJ. J. DravisR. P. EhasM. J. JoannouA. J. KalvaitisW. E. LaubachG. R. NourseM. F. OlenderG. O. PerkinsJ. RuleJ. C. ScottJ. F. SellersS. D. SmithE. M. SpencerS. H. TelanderThe Standards Committee on Power Switchgear, C37, which reviewed and approved this standard, had the followingpersonnel at the time of approval:W. E. Laub