VERLIFE Guidelines for Integrity and Lifetime Assessment of Components and Piping in WWER Nuclear Power Plants - Appendices A-F
The VERLIFE Guidelines are validated procedures for the calculation of the residual lifetime and integrity of components and piping of WWER–type reactors. They cover procedures for the calculation of the resistance against fast fracture, fatigue damage, corrosion-mechanical damage and acceptability of flaws found during in-service inspection. They also contain procedures for integrity evaluation of piping, in-service inspection qualifications, risk-informed in-service inspection as well as integrity and lifetime of reactor vessel internals and components supports. Numerous appendicies on related specific topics like e.g. degradation assessment of material properties by radiation damage and thermal ageing, thermal hydraulic regimes for pressurized thermal shock evaluations, etc. are part of the guidelines.
VERLIFE Guidelines are mainly based on former Soviet/Russian Rules and Codes for design and manufacturing of components and piping of WWER-type reactors. But they also incorporate operational experience of countries with running WWER-type reactors (i.e. Bulgaria, Czech Republic, Finland, Slovakia, Ukraine, …) and to some extent approaches used in codes and rules of pressurised water reactors (PWRs), to be consistent with current PWR codes and rules as much as possible and thus provide modern, applicable procedures for component integrity and residual lifetime assessment of WWER-type plant components and piping. The VERLIFE Guidelines, in full or in parts, may be used for the preparation of official reports to support periodic safety review, licensing and plant life management programmes of WWER-type reactors with the approval of the national nuclear regulatory authority. This publication contains Appendices A-F of the VERLIFE Guidelines:
- Appendix A: Leak Before Break (LBB) Concept application to the Selected Piping systems of WWR-type NPPs
- Appendix B: No-Break-Area Assessment for WWER Piping
- Appendix C: Integrity and Lifetime Assessment Procedure of RPV Internals in WWER-type NPPs during Operation
- Appendix D: Risk-Informed In-Service Inspection
- Appendix E: NDE System Qualification
- Appendix F: Component and Piping Supports
This publication is linked to JRC publication JRC 138449, which is the main document of the VERLIFE Guidelines. The latter contains the main chapters and all other appendices, Appendices I – XVIII, of the guidelines. It also contains a description of the structure of the VERLIFE Guidelines and a description of their drafting process.
BRUMOVSKY M.;
MARTIN Oliver;
2024-07-18
Publications Office of the European Union
JRC138451
978-92-68-18741-8 (online),
OP KJ-06-24-144-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC138451,
10.2760/58605 (online),
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