CSA N285 7-2015 Periodic inspection of CANDU nuclear power plant balance of plant systems and components (First Edition).pdf

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1、N285.7-15Periodic inspection of CANDU nuclearpower plant balance of plant systems andcomponentsLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approvedby the Standards Council of Canada. This pro

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18、gal Notice.Standards Update ServiceN285.7-15November 2015Title: Periodic inspection of CANDU nuclear power plant balance of plant systems andcomponentsTo register for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need

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20、ts reserved. No part of this publication may be reproduced in any form whatsoeverwithout the prior permission of the publisher.Published in November 2015 by CSA GroupA not-for-profit private sector organization178 Rexdale Boulevard,Toronto, Ontario, Canada M9W 1R3To purchase standards and related pu

21、blications, visit our Online Store at shop.csa.caor call toll-free 1-800-463-6727 or 416-747-4044.TMA trade-mar k of the Canadian S tandards Association, operating as “CSA Group”Periodic inspection of CANDUnuclear power plant balance ofplant systems and componentsN285.7-15N285.7-15Periodic inspectio

22、n of CANDU nuclear power plant balance of plantsystems and componentsNovember 2015 2015 CSA Group 1ContentsTechnical Committee on Periodic Inspection of CANDU Nuclear Power Plant Components 4Preface 71 Scope 92 Reference publications 103 Definitions 114 General requirements 154.1 Prerequisites 154.1

23、.1 Nature of inspection 154.1.2 Operation and maintenance 154.1.3 Power plant operation 154.2 Hazards 154.3 Radiation exposure 154.4 Program documents 164.5 Owner/operators responsibility 164.6 Accessibility 174.6.1 Access for inspection 174.6.2 Existing plants 175 Inspection methods, qualification,

24、 and procedures 175.1 Inspection methods 175.2 Inspection procedures 185.2.10 Volumetric methods 195.3 Inspection qualification 206 Inspection personnel and qualifications 207 Evaluation of inspection results 217.1 Evaluation 217.2 General acceptance criteria 217.3 Visual inspection 217.4 Surface in

25、spection 227.5 Volumetric inspection 227.6 Dimensional inspection 227.7 Integrative inspection 227.8 Dispositioning 228 Repairs and replacements 239 Modifications 2310 Recording requirements and reports 2410.1 General requirements 24N285.7-15Periodic inspection of CANDU nuclear power plant balance o

26、f plantsystems and componentsNovember 2015 2015 CSA Group 210.2 Inspection records 2410.3 Inspection reports 2410.3.1 Inaugural inspection reports 2410.3.2 Periodic inspection reports 2411 Inspection regions 2511.1 Systems 2511.1.1 Systems subject to inspection 2511.1.2 Extent of systems subject to

27、inspection 2511.2 Grouping of systems and components 2511.3 Consequence and potential of failure assessments 2611.3.1 Consequence of failure assessment 2611.3.2 Potential of failure assessment 2611.4 Segment risk categorization 2611.5 Element assessment and selection 2611.6 Change-in-risk evaluation

28、 2712 Inspection intervals and time of inspections 2712.1 Operating systems 2712.1.5 Inaugural inspection 2812.1.6 Dormant systems 2813 Periodic and inaugural inspections 2813.1 General requirements 2813.1.2 Extent of inspection 2913.1.3 Inspection for corrosion and erosion 2913.2 Piping 3013.2.1 Ge

29、neral requirements 3013.2.2 Extent of inspection and sample size 3013.2.3 Inspection intervals and time of inspections 3113.2.4 Inspection methods and procedures 3113.2.5 Evaluation of results and dispositioning 3213.2.6 Records and reports 3213.3 Vessels 3213.3.1 General requirements 3213.3.2 Exten

30、t of inspection and sample size 3213.3.3 Inspection intervals and time of inspections 3313.3.4 Inspection methods and procedures 3413.3.5 Evaluation of results and dispositioning 3413.3.6 Records and reports 3413.4 Mechanical couplings 3413.4.1 General requirements 3413.4.2 Extent of inspection and

31、sample size 3413.4.3 Inspection intervals and time of inspections 3513.4.4 Inspection methods and procedures 3513.4.5 Evaluation of results and dispositioning 3613.4.6 Records and reports 3613.5 Pumps 3613.5.1 General requirements 36N285.7-15Periodic inspection of CANDU nuclear power plant balance o

32、f plantsystems and componentsNovember 2015 2015 CSA Group 313.5.2 Extent of inspection and sample size 3613.5.3 Inspection intervals and time of inspections 3713.5.4 Inspection methods and procedures 3713.5.5 Evaluation of results and dispositioning 3713.5.6 Records and reports 3713.6 Valves 3813.6.

33、1 General requirements 3813.6.2 Extent of inspection and sample size 3813.6.3 Inspection intervals and time of inspections 3913.6.4 Inspection methods and procedures 3913.6.5 Evaluation of results and dispositioning 3913.6.6 Records and reports 3913.7 Supports 3913.7.1 General requirements 3913.7.2

34、Extent of inspection and sample size 3913.7.3 Inspection intervals and time of inspections 4113.7.4 Inspection methods and procedures 4113.7.5 Evaluation of results and dispositioning 4113.7.6 Records and reports 4113.8 Rotating machinery 4213.8.1 General requirements 4213.8.2 Extent of inspection a

35、nd sample size 4213.8.3 Inspection intervals and time of inspections 4213.8.4 Inspection methods and procedures 4313.8.5 Evaluation of results and dispositioning 4313.8.6 Records and reports 43Annex A (informative) Guide for periodic inspection 51Annex B (normative) Pre-screening process 53Annex C (

36、normative) Consequence of failure assessment 60Annex D (normative) Potential of failure assessment 71Annex E (normative) Risk categorization, sample size determination, and element selection 125Annex F (informative) Rationale for grouping identical elements 128N285.7-15Periodic inspection of CANDU n

37、uclear power plant balance of plantsystems and componentsNovember 2015 2015 CSA Group 4Technical Committee on PeriodicInspection of CANDU Nuclear Power PlantComponentsN.C. van den Brekel Ontario Power Generation Inc.,Pickering, OntarioCategory: Owner/Operator/ProducerChairD. Scarth Kinectrics Inc.,T

38、oronto, OntarioCategory: Service IndustryVice-ChairM. Rezaie-Manesh Ontario Power Generation Inc.,Pickering, OntarioSecretaryAssociateN. Azer Amec Foster Wheeler,Toronto, OntarioCategory: Service IndustryJ.A. Baron Folville Consulting Inc.,Mississauga, OntarioAssociateA. Blahoianu Canadian Nuclear S

39、afety Commission (CNSC),Ottawa, OntarioAssociateT. Boyd Lobo Consulting,Millgrove, OntarioCategory: General InterestN. Bruns Babcock however, it mayprovide more specific direction for those requirements.Users of this Standard are reminded that the operation of nuclear facilities in Canada is subject

40、 to therequirements of the Nuclear Safety and Control Act and Regulations. The Canadian Nuclear SafetyCommission may impose additional requirements to those specified in this Standard.Portions of this Standard have been developed using the Risk Informed In-service Inspection (RI-ISI)methodologies an

41、d definitions from ASME BPVC Section XI with 2011 Addenda, Code Case N-578-1,ASME RA-Sa-2009 and EPRI RI-ISI TR-112657 Rev B-A. Excerpts reprinted with permission from TheAmerican Society of Mechanical Engineers, Electric Power Research Institute, Inc., and InternationalAtomic Energy Agency.This Sta

42、ndard was prepared by the Technical Committee on Periodic Inspection of CANDU NuclearPower Plants, under the jurisdiction of the Strategic Steering Committee on Nuclear Standards, and hasbeen formally approved by the Technical Committee.Notes:1) Use of the singular does not exclude the plural (and v

43、ice versa) when the sense allows.2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that itremains the responsibility of the users of the Standard to judge its suitability for their particular purpose.3) This Standard was developed by consen

44、sus, which is defined by CSA Policy governing standardization Codeof good practice for standardization as “substantial agreement. Consensus implies much more than a simplemajority, but not necessarily unanimity”. It is consistent with this definition that a member may be included inthe Technical Com

45、mittee list and yet not be in full agreement with all clauses of this Standard.4) To submit a request for interpretation of this Standard, please send the following information toinquiriescsagroup.org and include “Request for interpretation” in the subject line:a) define the problem, making referenc

46、e to the specific clause, and, where appropriate, include anillustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address theissue.Committee interpretatio

47、ns are processed in accordance with the CSA Directives and guidelinesgoverning standardization and are available on the Current Standards Activities page atstandardsactivities.csa.ca.N285.7-15Periodic inspection of CANDU nuclear power plant balance of plantsystems and componentsNovember 2015 2015 CS

48、A Group 85) This Standard is subject to review five years from the date of publication. Suggestions for its improvement willbe referred to the appropriate committee. To submit a proposal for change, please send the followinginformation to inquiriescsagroup.org and include “Proposal for change” in th

49、e subject line:a) Standard designation (number);b) relevant clause, table, and/or figure number;c) wording of the proposed change;d) rationale for the change.N285.7-15Periodic inspection of CANDU nuclear power plant balance of plantsystems and componentsNovember 2015 2015 CSA Group 9N285.7-15Periodic inspection of CANDU nuclearpower plant balance of plant systems andcomponents1 Scope1.1This Standard defines requirements for the periodic inspection of balance of plant pressure retainingsystems, components, and supports that form part of a CANDU nucle