IEEE 622-1987 en Recommended Practice for the Design and Installation of Electric Heat Tracing Systems for Nuclear Power Generating Stations《核电站电热追踪系统的设计与安装推荐规程.pdf
《IEEE 622-1987 en Recommended Practice for the Design and Installation of Electric Heat Tracing Systems for Nuclear Power Generating Stations《核电站电热追踪系统的设计与安装推荐规程.pdf》由会员分享,可在线阅读,更多相关《IEEE 622-1987 en Recommended Practice for the Design and Installation of Electric Heat Tracing Systems for Nuclear Power Generating Stations《核电站电热追踪系统的设计与安装推荐规程.pdf(38页珍藏版)》请在麦多课文档分享上搜索。
1、ANSI/IEEE Std 622-1987(R1994)(Revision of ANSI/IEEE Std 622-1979)An American National StandardIEEE Recommended Practice for the Design and Installation of Electric Heat Tracing Systems for Nuclear Power Generating StationsSponsorPower Generation Committeeof theIEEE Power Engineering SocietyApproved
2、December 11, 1986Reaffirmed September 22, 1994IEEE Standards BoardApproved November 23, 1987Reaffirmed March 17, 1995American National Standards Institute Copyright 1987 byThe Institute of Electrical and Electronics Engineers, Inc345 East 47th Street, New York, NY 10017, USANo part of this publicati
3、on may be reproduced in any form, in an electronic retrieval system or otherwise, without theprior written permission of the publisher.IEEE Standards documents are developed within the Technical Committees of the IEEE Societies and the StandardsCoordinating Committees of the IEEE Standards Board. Me
4、mbers of the committees serve voluntarily and withoutcompensation. They are not necessarily members of the Institute. The standards developed within IEEE represent aconsensus of the broad expertise on the subject within the Institute as well as those activities outside of IEEE whichhave expressed an
5、 interest in participating in the development of the standard.Use of an IEEE Standard is wholly voluntary. The existence of an IEEE Standard does not imply that there are no otherways to produce, test, measure, purchase, market, or provide other goods and services related to the scope of the IEEESta
6、ndard. Furthermore, the viewpoint expressed at the time a standard is approved and issued is subject to changebrought about through developments in the state of the art and comments received from users of the standard. EveryIEEE Standard is subjected to review at least once every five years for revi
7、sion or reaffirmation. When a document ismore than five years old, and has not been reaffirmed, it is reasonable to conclude that its contents, although still ofsome value, do not wholly reflect the present state of the art. Users are cautioned to check to determine that they havethe latest edition
8、of any IEEE Standard.Comments for revision of IEEE Standards are welcome from any interested party, regardless of membership affiliationwith IEEE. Suggestions for changes in documents should be in the form of a proposed change of text, together withappropriate supporting comments.Interpretations: Oc
9、casionally questions may arise regarding the meaning of portions of standards as they relate tospecific applications. When the need for interpretations is brought to the attention of IEEE, the Institute will initiateaction to prepare appropriate responses. Since IEEE Standards represent a consensus
10、of all concerned interests, it isimportant to ensure that any interpretation has also received the concurrence of a balance of interests. For this reasonIEEE and the members of its technical committees are not able to provide an instant response to interpretation requestsexcept in those cases where
11、the matter has previously received formal consideration.Comments on standards and requests for interpretations should be addressed to:Secretary, IEEE Standards Board345 East 47th StreetNew York, NY 10017USAiiiForeword(This Foreword is not a part of IEEE Std 622-1987, IEEE Recommended Practice for th
12、e Design and Installation of Electric HeatTracing Systems for Nuclear Power Generation Stations.)The realization that electric heat tracing systems play an important role in the normal operation of both nuclear andnon-nuclear processes in nuclear power generating stations has now come of age. This i
13、s apparent by the increasedamount of space being devoted to electric heat tracing in station technical specifications, system descriptions, andoperating criteria. Such electric heat tracing systems are applied on borated water systems and on water treatmentsystems such as caustic. Since boric acid a
14、nd caustics in water will crystalize or precipitate out of the solutiondepending on their concentrations at temperatures above ambient, and since such crystallization can make the pipingsystem inoperable for normal operation, electric heat tracing systems are required to keep the solutions and pipin
15、gsystems in a state to perform their intended functions. Electric heat tracing systems may also be applied on pipinglocated outdoors at nuclear generating stations for the purpose of preventing the piping systems from freezing. Itshould be noted that each and all of these piping systems can include
16、valves, pumps, strainers, tanks, andinstrumentation components that can be rendered inoperable due to solutions crystallizing or freezing. Therefore, adefinite need exists within the power industry for recommendations that provide a uniform method for the design andinstallation of electric heat trac
17、ing systems that meet the requirements for rendering reliable operation of the pipingsystem. Without such recommendations, station reliability may be jeopardized.This recommended practice is intended to meet the design and installation needs for pressurized water reactor (PWR)and boiling water react
18、or (BWR) nuclear generating stations. Breeder reactors and other types of applications areoutside the scope of this document. Also, the principles in this document are applicable to all types of generatingstations, for example, fossil, hydroelectric, etc. Presented herein are such recommendations an
19、d topics as identificationof piping systems to be heated, temperature requirements, heater design considerations, heat tracing systems design(including control and monitoring), power systems design, installation of electric heat tracing systems, testing of thesystems, and maintenance considerations.
20、Since electric heat tracing systems are interrelated with electric power and alarm systems, other IEEE standards shouldbe referred to when using this recommended practice. The recommendations presented herein are not intended tosupersede any current IEEE standards or practices, and sound engineering
21、 judgment should always be used whenapplying this or any other IEEE standard.Electric heat tracing systems play an important role in the normal operation of nuclear generating stations. Therefore,redundant circuit and heater considerations with respect to station reliability are covered in this reco
22、mmended practicealong with alarm considerations. This document recommends that electric heat tracing systems not be classified asClass lE systems and that critical process control systems be powered from reliable station power sources. If thesereliable power sources are the engineered safety feature
23、s (ESF) buses, then the electric heat tracing systems should bepowered through suitable isolation devices in accordance with ANSI/IEEE Std 308-1980, IEEE Standard Criteria forClass lE Power Systems for Nuclear Power Generating Stations, and ANSI/IEEE Std 384-1981, IEEE StandardCriteria for Independe
24、nce of Class lE Equipment and Circuits.The recommendation for not classifying electric heat tracing systems as Class lE is based on station operating criteria.In its investigation of electric heat tracing systems for critical process piping, the working group could find no evidencethat a properly de
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- IEEE6221987ENRECOMMENDEDPRACTICEFORTHEDESIGNANDINSTALLATIONOFELECTRICHEATTRACINGSYSTEMSFORNUCLEARPOWERGENERATINGSTATIONS

链接地址:http://www.mydoc123.com/p-1248795.html