IAEA LTO References
IAEA, SF-1 “Fundamental Safety Principles”, 2006[edit]
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Safety Fundamentals establish the core safety objectives and principles for protection and safety in nuclear activities, forming the essential framework for defining safety requirements.
IAEA, SSR 2/1 “Safety of Nuclear Power Plants: Design”, Revision 1, 2016[edit]
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This document sets safety requirements that must be met during the design stage of an NPP, and it expands the safety objectives and principles established in SF-1. The most relevant safety requirement to LTO is the safety requirement 31 that states the following “The design life of items important to safety at a nuclear power plant shall be determined. Appropriate margins shall be provided in the design to take due account of relevant mechanisms of ageing, neutron embrittlement and wear out and of the potential for age related degradation, to ensure the capability of items important to safety to perform their necessary safety functions throughout their design life”. However, other safety requirements in this document are also applicable to LTO.
IAEA, SSR 2/2 “Safety of Nuclear Power Plants: Commissioning and Operation”, Revision 1, 2016[edit]
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This document imposes safety requirements that must be met by the operating organizations during the commissioning and operation stages of an NPP, and moreover it expands the safety objectives and principles established in SF-1. The most relevant safety requirements to LTO are the safety requirements 14 and 16 that specify the following “The operating organization shall ensure that an effective ageing management programme is implemented to ensure that required safety functions of systems, structures and components are fulfilled over the entire operating lifetime of the plant” and “Where applicable, the operating organization shall establish and implement a comprehensive programme for ensuring the long term safe operation of the plant beyond a time-frame established in the license conditions, design limits, safety standards and/or regulations”. However, other safety requirements in this document are also applicable to LTO.
IAEA, SSG-48 “Ageing Management and Development of a Programme for Long Term Operation of Nuclear Power Plants”, 2018[edit]
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This specific safety guide provides recommendations on aging management and safe LTO for operating organizations. It addresses the basic concepts of LTO, aging management (AM) and obsolescence management. Furthermore, it provides the guidance on aging management tasks such as the scope setting process, AMR, AMPs and TLAAs.
IAEA, SRS-82 “Ageing Management for NPPs: International Generic Ageing Lessons Learned (IGALL)”, Revision 1, 2020[edit]
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This document has been issued by the IAEA to provide a common internationally agreed basis on what constitutes an acceptable AMP when designing a new NPP and to serve as a roadmap on AM and LTO processes for existing NPPs.
It has been developed at a multinational level, after a series of four specialist meetings from 2010 to 2019, first under the IAEA Extrabudgetary Programme on Safety Aspects of LTO of Water Moderated Reactors and later on the Extrabudgetary Programme on International Generic Ageing Lessons Learned. SRS-82 has been based on a set of previous reports of American US NRC (mainly Standard Review Plan SRP-LR, NUREG-1800, Rev. 2, 2010, and GALL Report NUREG-1801, Rev. 2, 2010). The IGALL Report and its Annexes will be periodically updated at 4-to-5-year intervals.
The IGALL Report is complemented by a complete set of tables and data in the form of databases and master-tables for AMPs, TLAAs and other relevant information needed to develop an AMR. It addresses AM of passive and active components for water moderated reactors (namely PWR, BWR, PHWR-CANDU, WWER) that can have direct or indirect influence in the safe operation of the plant that are susceptible to aging degradations.
IAEA, SRS-106 “Ageing Management and LTO of NPPs: Data Management, Scope Setting, Plant Programmes and Documentation”, 2022[edit]
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The objective of this safety report is to provide supplementary information to support the implementation of the recommendations and guidance given in safety guide SSG-48. It focuses on NPPs throughout their lifetime, including operation beyond the time frame originally established for their operation and decommissioning (i.e. LTO), while considering the different reactor designs that exist around the world. It is also relevant for facilities for spent fuel storage and radioactive waste management at nuclear power plants. It may also be used as a basis for managing the aging of other nuclear installations and for radioactive waste management facilities. This Safety Report is intended to provide information for operating organizations but may be also used by regulatory bodies in their assessment and inspection tasks.
IAEA, SRS-109 “Regulatory Oversight of Ageing Management and LTO Programme of NPPs”, 2022[edit]
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This safety report is intended to establish, in a comprehensive document, the practices based on existing international regulatory approaches in defining and/or applying:
- Regulatory requirements and guidance for AMR and LTO,
- Preconditions for LTO, including documentation to be submitted, scheduling of submissions and applicable review and assessment processes,
- The authorization processes to be applied to LTO,
- Regulatory oversight of AM and other plant programs with respect to LTO,
- Regulatory practices applied for the oversight of plant preparedness for implementation of LTO, and
- Documentation during regulatory oversight of LTO.
IAEA, SRS-121 “Use of Periodic Safety Review for Long Term Operation of Nuclear Power Plant ”, 2023[edit]
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There are several countries worldwide that use the Periodic Safety Review (PSR) to support the decision-making for LTO of NPPs to fulfil regulatory requirements or to maintain a high level of nuclear safety. This safety report summarizes the common basis for using PSR results in support of justification of LTO and provides valuable information on synchronization of the PSR and LTO activities by exploiting the PSR safety factors related to LTO.
Record of Revisions[edit]
| Number | Date | Description of Changes |
|---|---|---|
| 0 | 6/11/2024 | Initial version |