CSA N Environmental qualification of equipment for nuclear power plants

Transcription

1 CSA N Environmental qualification of equipment for nuclear power plants Michael K. Steeves P.Eng. Senior EQ Engineer, NB Power Point Lepreau Generating Station Deanna Mendolia P.Eng. CSA Group 2018 CSA Group Management Corp. All Rights Reserved.

2 Presentation Objectives To provide an overview of: 1. CSA standards development process 2. CSA nuclear standards program and structure 3. CSA N Standard 2

3 Introduction to CSA Group

4 Overview of CSA Group Key Facts Established in 1919 Independent, not-for profit, member-based organization Global leader in standards development, product testing and certification, and product evaluation 38 offices in 15 countries Sin ga po re 4

5 Overview of CSA Group A Trusted Brand 35,000 customers globally CSA mark appears on billions of products worldwide 9,000+ engaged and committed Members 3,000+ standards in 54 technologies Offer training, education and certification to over 6,000 people per year creating a better, safer, more sustainable world where standards work for people and business 5

6 CSA Standards Develop voluntary standards designed to: - Enhance public safety and health - Advance quality of life - Protect the environment - Facilitate trade Key fields: - Sustainability - Health & Safety - Energy & Utilities - Electrical - Gas Systems & Appliances Accredited by the Standards Council of Canada (SCC) and the American National Standards Institute (ANSI) 6

7 Breadth of CSA Standards Management Systems Quality Management and Auditing, Risk Management Construction and Infrastructure Building Products and Systems, Components & Structures, Masonry & Steel, Plumbing Electrical Installation and Safety Codes, Products and Components, Distribution and Generation, Engineering, Electro-Magnetic Compatibility Energy Petroleum & Natural Gas Industry Systems, Gas & Fuel Burning Equipment Alternative Energy Vehicles, Energy Efficiency, Renewable Energy Nuclear Environment Environmental Performance and Management, Life Cycle Analysis and Product Labelling Health Care and Medical Devices Facilities Engineering, Patient Care and Safety, Infection Control, Sterilization and Device Reprocessing, Blood and Tissue, Medical Labs, nanotechnologies Worker and Workplace Safety Ergonomics, Electrical Safety, Management Systems, Equipment & Machine Safety, Fall Protection, Personal Protective Equipment Technical Safety Pressure Vessels, Elevators and Lifting Devices, Transportation Public and Community Safety Injury Protection, Accessibility, Emergency Preparedness 7

8 CSA Standards Development Process 8

9 About CSA Standards Standards Development Methodology CSA members develop standards content; staff facilitates the accredited development process Once published, standards are living documents, continually revised and refreshed CSA standards are voluntary documents Only when referenced by government or a regulatory authority is their compliance mandatory 9

10 Standards Development Process Project Proposal Assign to Committee Notice of Intent Public notification Meetings/ Draft Public Review TC reaches consensus Technical Approval (vote) Publication Public notification (60 days) Maintenance Public notification During this stage the public can: 1. submit suggestions for change 2. request an interpretation of a requirement 10

11 Nuclear Program 11

12 CSA Nuclear Program The CSA Nuclear Program was established in response to the needs of the Canadian nuclear industry and its regulator for a reliable process to develop vital standards to promote the safe and reliable operation of the nuclear power industry in Canada. 12

13 CSA Nuclear Program Program objectives Provides standards and forums for 1. Capturing minimum requirements 2. Capturing current practices (best practices) 3. Enhancing public input and acceptability 4. Providing consistent guidance to industry 5. Supporting and complementing the regulatory process 13

14 CSA Nuclear Program Scope of program 55 active committees comprised of more than 550 expert volunteer members in 13 subject areas Portfolio of 60+ published standards and guides 80% are technology neutral 20% are CANDU-specific 14

15 CSA Nuclear Program Nuclear expertise CSA Group works as facilitators to bring together the knowledge and expertise of our members to develop standards. Some of our member organizations include: 15

16 CSA Nuclear Program Application of CSA Nuclear Standards Represent the technical requirements for compliance with regulation Referenced in Licences and Licence Conditions Handbooks of Canadian nuclear facilities Form part of the CNSC s Regulatory Framework Structure and Five-Year Development Plan 16

17 Summary CSA s development process & nuclear standards solutions Provides a comprehensive suite of standards to address industry needs in numerous areas Complement regulation and policy Offer a transparent process to meet current and emerging standards needs 17

18 CSA Nuclear Program Membership base The program s multi-stakeholder committees typically include representatives from the following interest groups Government Owners / Operators Suppliers / Fabricators Service Industry General Interest 18

19 CSA overview Committee structure Nuclear Strategic Steering Committee Develops strategic business direction - balanced representation Technical Committees Approval - Technical Content - balanced representation Technical Subcommittees Technical Content All supported by a team of CSA standards professionals 19

20 Existing Technical Committees Decommissioning of Nuclear Facilities Integrated Management Systems Reactor Control Systems, Safety Systems & Instrumentation N290A Technical Committee Radioactive Waste Management Environmental Management Periodic and In- Service Inspections Program Areas Reactor Safety and Risk Management Pressure-Retaining Components and Systems Structural Requirements / Safety Related Structures Fire Protection Emergency Management Seismic Design 20

21 CSA N290.13

22 CSA N Standard History First Edition (2005) Amendment (2009) Reaffirmation (2010 & 2015) Second Edition (2019) This Standard was prepared by the Technical Subcommittee (TSC) on Environmental Qualification Requirements for Nuclear Power Plants, under the N290A Technical Committee (TC). N is referenced under the Compliance Verification Criteria of License Conditions Handbooks The Standard was originally published under the name Environmental qualification of equipment for CANDU nuclear power plants 23

23 Differences from IEC/IEEE and CSA N is primarily aimed at equipment manufacturers N is aimed at Nuclear Plants gives significantly more guidance on qualification testing N is consistent with testing requirements and points to for additional guidance for testing is issued by IEC/IEEE E being Electrical N makes no differentiation between electrical and mechanical 24

24 Differences from and N Cont. N allows qualification by analysis In practice it is limited to mechanical equipment N does not extend beyond environmental, though it recognizes that other qualifications may be necessary 25

25 CSA N290.13:2019 Overview How to run an EQ program at a Nuclear Plant Includes Safety Analysis Qualification of Equipment Preservation of Qualification 26

26 Figure 1: Overview of process (1/3) 27

27 Figure 1: Overview of process (2/3) 28

28 Figure 1: Overview of process (3/3) 29

29 N Section 0 General and Program Objectives Requirements of an EQ program Design inputs for safety functions, performance, normal service conditions and DBA service conditions Documented objective evidence that equipment is capable Controls and evidence that equipment is suitably installed Controls and evidence that qualification is preserved 30

30 Clause 1: Scope 1.1: Provide auditable assurance that required equipment will preform its safety function in a harsh environment 1.2: Mild environments are not covered 1.4: The preservation requirements include maintenance, modification and procurement activities 31

31 Clause 2: References Include QA standards ASME Regulatory documents IAEA glossary IEC/IEEE 32

32 Clause 3: Definitions Standard definitions derived from other standards Attempt to retain consistent definitions with other EQ standards 33

33 Clause 4: Identification of EQ Requirements Outputs from Safety Analysis 4.2: DBA identification Expected Temperatures and Radiation for post-accident operation in different areas of the plant 4.3: Normal service conditions 4.4: Equipment requiring EQ Systems Subsystems Equipment Equipment whose failure could affect qualified equipment 34

34 Clause 4: Identification of EQ Requirements Cont : Exemptions Can exempt equipment from qualification if: Environment conditions during an accident don t significantly worsen There are no credible unsafe failure modes induced by the accident Design/procurement controls remain in place 4.5: Documentation EQ List: A list of equipment that requires qualification Identification of equipment (make, model, physical location, interfaces) Safety function Applicable DBA Mission times Performance requirements 35

35 Clause 5: Establishing EQ 5.2: Required Qualification Documentation Equipment specifications Qualification plans 5.3: Qualification by testing Very much aligned with : Qualification by analysis Used in limited cases, particularly with mechanical equipment 5.5: Qualification by operating experience 36

36 Clause 5: Establishing EQ Cont. 5.6: Combined qualification Realistically the most used method for pre-qualified equipment Used to match test profiles to required profile 37

37 Clause 5: Establishing EQ Cont. 5.7: Condition-Based Qualification Aligned to IEC/IEEE Caused lots of confusion with the previous title Condition Monitoring Verifies that equipment is in a qualified condition rather than within its qualified life Currently used only with cables, but available if desired Generally required to be chosen during qualification testing 38

38 Clause 6: Preserving EQ 6.2: Modifications 6.3: New installations completion assurance 6.4: Maintenance EQ preservation must be built in to maintenance programs EQ equipment must be identified Must be documented and traceable Unexpected failures must be made available 39

39 Clause 6: Preserving EQ Con t 6.5: Procurement QA requirements Allowable changes 6.6: Spare parts Same requirements on spare parts as on original equipment 6.7: Shelf life and storage Must have a shelf life program 40

40 Clause 6: Preserving EQ Con t 6.8: Surveillance 6.8.1: Equipment must be walked down to verify that assumptions made during initial qualification are still valid Configuration control Effect of surrounding equipment Need to document and resolve EQ discrepancies 6.8.2: Service condition monitoring Radiation and Temperature done at an area level Take into account seasonal variations Unexpected conditions must be fed back into qualification calculations Other aging stressors identified as relevant for that equipment, i.e. self heating, must be monitored. 41

41 Clause 6: Preserving EQ Con t 6.9: Reassessment of qualified life Allows changes to qualified life based on actual field conditions Can increase or decrease qualified life Also allows retesting of field aged equipment or reassessment based on measured condition of equipment 42

42 Clause 6: Preserving EQ Con t 6.10: Personnel training for everyone doing EQ activities 43

43 Clause 7: Barriers It is possible to qualify an entire room to prevent steam ingress Must be controls, identification and inspection 44

44 Clause 8: Program Health Monitoring Must have periodic evaluation of the program 45

45 Clause 9: Quality Assurance All activities must meet the requirement of CSA N286 Management system requirements for nuclear facilities 46

46 Clause 10: Survivability assessments for DEC Design Extension Condition survivability assessments are outside the scope of an EQ program. Guidance is given in Appendix B on preparing survivability assessments, a less rigorous method to give reasonable confidence that equipment will survive. 47

47 Viewing the CSA N Standard The Standard will be published in January of Once issued, interested parties can create an account at to view the standard. 48

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