INSAG documents related to Ageing and Long Term Operation
This section provides IAEA INSAG documents which are relevant to ageing and long term operation.
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INSAG 8 “A Common Basis for Judging the Safety of Nuclear Power Plants Built to Earlier Standards” More
The primary objectives of INSAG 8 are:
- To develop a common basis on which an acceptable1 level of safety of all operating nuclear power plants built to earlier standards can be judged; and
- To provide a basis for deciding:
o Who has the responsibility for conducting an assessment;
o Which overall approach should be used in that assessment; and
o What criteria should be used to decide what corrective actions are needed.
INSAG 8 specifically encourages risk assessment for plants that have not followed comprehensive systematic approaches for safety review, or for plants with which for other reasons high risks are judged to be associated.
INSAG 14 “Safe Management of the Operating Life Times of Nuclear Power Plant” More
INSAG 14 is devoted to providing a general approach to safe management of the operating lifetimes of nuclear power plants. It complements the INSAG-8 report. The present report deals with the evolution of the safety of nuclear power plants in relation to their operating environment and history.
INSAG 14:
- Suggests a general safety objective for safe management of the operating lifetimes of nuclear power plants;
- Reflects on the ageing processes that can degrade the integrity of structures and components over time;
- Presents some considerations about ageing that should be taken into consideration at the design and construction stages for new plants;
- Presents principles related to the treatment of physical ageing of structures and components, in order to maintain operating plants consistent with their initial design basis;
- Emphasizes the need to check whether the safety levels of operating plants are still acceptable, or whether they may possibly have to be upgraded;
- Promotes safety reviews as a good means of dealing with these issues;
- Draws attention to infrastructural issues that may influence the capability to provide adequate means for safe management of the operating lifetimes of nuclear power plants, and underlines that these areas have also to be properly managed;
- Emphasizes the distinct yet interdependent roles of both the operating organization and the regulator in the safe management of the operating lifetimes of nuclear power plants.
