1、IEEE Std 384-2008(Revision of IEEE Std 384-1992)IEEE Standard Criteria for Independence of Class 1E Equipment and Circuits IEEE3 Park Avenue New York, NY 10016-5997, USA20 December 2008IEEE Power +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom u
2、se can also be obtained through the Copyright Clearance Center. iv Copyright 2008 IEEE. All rights reserved. Introduction This introduction is not part of IEEE Std 384-2008, IEEE Standard Criteria for Independence of Class 1E Equipment and Circuits. This standard provides criteria and requirements f
3、or establishing and maintaining the independence of Class 1E equipment and circuits and auxiliary supporting features by physical separation and electrical isolation. The 1992 revision of IEEE Std 384 incorporated separation criteria changes based on the results of separation testing completed by th
4、e nuclear industry on internally generated electrical faults. Where sufficient testing data were available, the separation distances were reduced. New configurations were also added including cable trays and conduits, cable trays and cable in free air, and conduits and cable in free air. See Annex B
5、 for additional discussion of the test programs. The IEEE has developed these criteria to provide guidance in the determination of the independence requirements related to the Class 1E systems of the nuclear facility. Adherence to these criteria may not fully address public health and safety issues
6、because it is the integrated performance of the structures, the fluid systems, and the instrumentation and electrical systems of the station that determine the consequences of accidents. Failure to meet these requirements may be an indication of system inadequacy. Each applicant has the responsibili
7、ty to provide assurance that this integrated performance is adequate. The principal changes in this revision include the following: Working Group for Independence Criteria and Design of Control Boards, Panels, and Racks (WG 6.5) investigated the application of physical separation criteria to fiber-o
8、ptic cable used in Class 1E and non-Class 1E circuits. No analyses or testing programs specific to the physical separation of fiber-optic cables have been performed to date by the nuclear industry as far as WG 6.5 knows. In lieu of this, WG 6.5 recognized that fiber-optic cable rated for the same te
9、mperature as current carrying instrumentation cable would produce similar results in a testing program. WG 6.5 used the same testing programs that formed the basis for the 1992 revision and extrapolated the results, with margin, to produce separation criteria for fiber-optic cable. WG 6.5 also recog
10、nized that fiber-optic cable is not capable of generating a fire due to an internally generated fault and does not require separation from other fiber-optic cable, or from current carrying cable, when fiber-optic cable is considered the source of the potential fire. The isolation device requirements
11、 for control and instrumentation circuits in 6.2 were also enhanced to reflect the inherent electrical isolation characteristics of fiber-optic circuits. See Annex C for additional discussion of fiber-optic circuits. WG 6.5 reviewed the effects of electromagnetic interference/radio frequency interfe
12、rence (EMI/RFI) to determine appropriate guidance for maintaining independence of Class 1E circuits. EMI/RFI was recognized as an effect that could be addressed through qualification of equipment, physical arrangement of equipment and systems in the plant, or maintenance and testing. A panel session
13、 was sponsored on January 26, 2005, by the Nuclear Power Engineering Committee (NPEC), including representatives from the Electric Power Research Institute (EPRI), equipment manufacturers, the Nuclear Regulatory Commission (NRC), and an independent consultant in the field. Results of the panel sessi
14、on were reviewed by a committee of representatives from the Subcommittee on Qualifications (SC2), the Subcommittee on Operations, Maintenance, Aging, and Testing (SC3), and the Subcommittee on Safety Related Systems (SC6). The committees final recommendation, as approved by NPEC on August 3, 2005, w
15、as that no new standard was warranted to address EMI/RFI. Instead, additional guidance for mitigating EMI/RFI should be included in Annex B of IEEE Std 603 a and referenced by other standards. WG 6.5 has provided general guidance in this revision of IEEE Std 384 to address the effects of EMI/RFI and
16、 to provide a reference to Annex B of IEEE Std 603 for further specific guidance. aInformation on references can be found in Clause 2. v Copyright 2008 IEEE. All rights reserved. This revision also changed the format of the distance criteria to be metric (followed by English units in parentheses) to
17、 match the usage criteria given in IEEE/ASTM SI 10-2002 B2.bWG 6.5 recognized that the specific English separation distances needed to be maintained because some were based on actual cable and raceway test, and that many of the criteria appear in nuclear power plants design and licensing bases. Some
18、 of the metric distances were changed to better match the conversion formulas given in IEEE/ASTM SI 10, to minimize rounding error, to keep the metric value greater than or equal to the English or within a very small error less than the English to ensure conservative separation distance, and to limi
19、t the number of significant digits. Other clauses of this standard have been reviewed, and many editorial improvements have been made, including updating the standard to the latest IEEE Standards Style Manual. Notice to users Laws and regulations Users of these documents should consult all applicabl
20、e laws and regulations. Compliance with the provisions of this standard does not imply compliance to any applicable regulatory requirements. Implementers of the standard are responsible for observing or referring to the applicable regulatory requirements. IEEE does not, by the publication of its sta
21、ndards, intend to urge action that is not in compliance with applicable laws, and these documents may not be construed as doing so. Copyrights This document is copyrighted by the IEEE. It is made available for a wide variety of both public and private uses. These include both use, by reference, in l
22、aws and regulations, and use in private self-regulation, standardization, and the promotion of engineering practices and methods. By making this document available for use and adoption by public authorities and private users, the IEEE does not waive any rights in copyright to this document. Updating
23、 of IEEE documents Users of IEEE standards should be aware that these documents may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. An official IEEE document at any point in time consists of the
24、current edition of the document together with any amendments, corrigenda, or errata then in effect. In order to determine whether a given document is the current edition and whether it has been amended through the issuance of amendments, corrigenda, or errata, visit the IEEE Standards Association We
25、b site at http:/ieeexplore.ieee.org/xpl/standards.jsp, or contact the IEEE at the address listed previously. For more information about the IEEE Standards Association or the IEEE standards development process, visit the IEEE-SA Web site at http:/standards.ieee.org. bThe numbers in brackets correspon
26、d to those of the bibliography in Annex A. vi Copyright 2008 IEEE. All rights reserved. Errata Errata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata per
27、iodically. Interpretations Current interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/ index.html. Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By public
28、ation of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity or scope of P
29、atents Claims or determining whether any licensing terms or conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are expressly advised that determination of the validity of any
30、patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. Participants At the time this standard was submitted to the IEEE-SA Standards Board for approval, WG 6.5 had the following member
31、ship: Randy C. Jamison, Chair Ijaz Ahmad John J. Disosway Patrick Gove Mark Walsh Paul L Yanosy Sr. The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. William J. Ackerman Stan Arnot Farouk Baxter Wesl
32、ey Bowers Daniel Brosnan Nissen Burstein Robert Carruth Suresh Channarasappa John Coyle Dennis Dellinger John J. Disosway Gary Engmann Stephen A. Fleger Robert Fletcher James Gleason Randall Groves Daryl Harmon Evans Heacock Hamidreza Heidarisafa David Horvath Randy C. Jamison James Jones Joseph L.
33、Koepfinger G. Lang Harvey Leake John Macdonald Omar Mazzoni Kimberly Mosley Michael S. Newman Gerald L. Nicely James Parello Ted Riccio Charles Rogers Fredrick Roy Glen Schinzel David Smith Brandon Swartley S. Thamilarasan James Thompson John Vergis James Wilson Paul L Yanosy Sr. David Zapraznyvii C
34、opyright 2008 IEEE. All rights reserved. When the IEEE-SA Standards Board approved this standard on 26 September 2008, it had the following membership: Robert M. Grow, Chair Thomas Prevost, Vice Chair Steve M. Mills, Past Chair Judith Gorman, Secretary Victor Berman Richard DeBlasio Andy Drozd Mark
35、Epstein Alexander Gelman William R. Goldbach Arnold M. Greenspan Kenneth S. Hanus Jim Hughes Richard H. Hulett Young Kyun Kim Joseph L. Koepfinger* John Kulick David J. Law Glenn Parsons Ronald C. Petersen Chuck Powers Narayanan Ramachandran Jon Walter Rosdahl Anne-Marie Sahazizian Malcolm V. Thaden
36、 Howard L. Wolfman Don Wright*Member Emeritus Also included are the following nonvoting IEEE-SA Standards Board liaisons: Satish K. Aggarwal, NRC Representative Michael H. Kelley, NIST Representative Jennie Steinhagen IEEE Standards Program Manager, Document Development Matthew J. Ceglia IEEE Standa
37、rds Program Manager, Technical Program Development viii Copyright 2008 IEEE. All rights reserved. Contents 1. Overview 1 1.1 Scope . 1 1.2 Purpose 1 2. Normative references 2 3. Definitions 3 4. General independence criteria 4 4.1 Required independence 4 4.2 Methods of achieving independence 4 4.3 E
38、quipment and circuits requiring independence 4 4.4 Compatibility with auxiliary supporting features 5 4.5 Associated circuits. 5 4.6 Non-Class 1E circuitsGeneral criteria . 7 4.7 Mechanical systems. 8 4.8 Structures and equipment 8 4.9 Fire protection systems 8 4.10 Fire. 8 4.11 Electromagnetic inte
39、rference/radio frequency interference (EMI/RFI). 8 5. Specific separation criteria . 9 5.1 Cables and raceways 9 5.2 Standby power supply . 18 5.3 DC system . 18 5.4 Distribution system 19 5.5 Containment electrical penetrations. 19 5.6 Control switchboards. 19 5.7 Instrumentation cabinets 21 5.8 Se
40、nsors. 21 5.9 Actuated equipment. 21 5.10 EMI/RFI 21 6. Specific electrical isolation criteria 22 6.1 Power circuits 22 6.2 Instrumentation and control circuits 23 Annex A (informative) Bibliography . 26 Annex B (informative) Relationship of cable testing programs to IEEE Std 384 27 Annex C (informa
41、tive) Application of separation criteria to fiber-optic cable. 28 1 Copyright 2008. IEEE. All rights reserved. IEEE Standard Criteria for Independence of Class 1E Equipment and Circuits IMPORTANT NOTICE: This standard is not intended to assure safety, security, health, or environmental protection in
42、 all circumstances. Implementers of the standard are responsible for determining appropriate safety, security, environmental, and health practices or regulatory requirements. This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and disclaimer
43、s appear in all publications containing this document and may be found under the heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http:/standards.ieee.org/IPR/ disclaimers.html. 1. Overview 1.1 Sc
44、ope This standard describes the independence requirements of the circuits and equipment comprising or associated with Class 1E systems. It sets forth criteria for the independence that can be achieved by physical separation and electrical isolation of circuits and equipment that are redundant, but d
45、oes not address the determination of what is to be considered redundant. 1.2 Purpose This standard establishes the criteria for implementation of the independence requirements of IEEE Std 308 1and IEEE Std 603. 1Information on references can be found in Clause 2. IEEE Std 384-2008 IEEE Standard Crit
46、eria for Indepedence of Class 1E Equipment and Circuits 2 Copyright 2008. IEEE. All rights reserved. 2. Normative references The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in the
47、text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. ANSI/ANS 58.2, Design Basis for Protection of Light Water Nuclear Po
48、wer Plants Against the Effects of Postulated Pipe Rupture.2ANSI/NFPA 30, Flammable and Combustible Liquids Code.3ANSI/NFPA 80A, Recommended Practice for Protection of Buildings from Exterior Fire Exposures. ANSI/NFPA 803, Fire Protection for Light Water Nuclear Power Plants. ASTM E84, Standard Test
49、Method for Surface Burning Characteristics of Building Materials.4ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials. ASTM E136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 C. IEEE Std 308, IEEE Standard Criteria for Class 1E Power Systems for Nuclear Power Generating Stations.5,6IEEE Std 338, IEEE Standard Criteria for the Periodic Surveillance Testing of Nuclear Power Generating Station Safety Systems. IEEE Std 383, IEEE Standard for Qualifying Class 1E Electric Cables and Field Splices
