This publication describes the practices and challenges related to risk aggregation for various hazards, various operational states, and considering all sources of potential radioactive releases at a nuclear installation site. It provides a methodology and technical basis for risk aggregation and describes the good practices and practical examples of risk aggregation developed by IAEA Member St…
The status of the IAEA safety standards derives from the IAEA’s Statute, which authorizes the IAEA to establish or adopt, in consultation and, where appropriate, in collaboration with the competent organs of the United Nations and with the specialized agencies concerned, standards of safety for protection of health and minimization of danger to life and property, and to provide for their appl…
This is the 41st edition of Reference Data Series No. 2, which presents the most recent reactor data available to the IAEA. It contains summarized information as of the end of 2020 on power reactors operating, under construction and shut down as well as performance data on reactors operating in the IAEA Member States. The information is collected through designated national correspondents in th…
This Safety Requirements publication was prepared under the IAEA programme on Safety Standards for Nuclear Installations. It establishes requirements and provides criteria for ensuring safety in site evaluation for nuclear installations. The Safety Guides on site evaluation listed in the references section provide recommendations on how to meet the requirements established in this Safety Requir…
This Safety Guide presents the safety principles and the approach underlying the design of nuclear pow er plants and identifies the relationship between the Code of Practice on Design for Safety of Nuclear Power Plants (IAEA Safety Series 50-C-D, hereafter referred to as the Code) and other Guides in the design. area of the NUSS Programme. It should be read as an elaboration of the safety princ…
The Country Nuclear Power Profiles (CNPP) publication compiles background information on the status and development of nuclear power programmes across participating International Atomic Energy Agency (IAEA) Member States. The publication summarizes organizational and industrial aspects of nuclear power programmes and provides information about the relevant legislative, regulatory and internatio…
The requirement of deriving design extension conditions (DEC), which are understood to comprise both conditions in events without significant fuel degradation and conditions in events with core melting, were introduced in IAEA Safety Standards Series No. SSR-2/1 (Rev. 1), Safety of Nuclear Power Plants: Design [1]. In SSR-2/1 (Rev. 1) [1], DEC were introduced for the purpose of further improvin…
Given the increasing interest of Member States in the near term deployment of SMRs, this publication presents several model technology roadmaps that States can adapt for their specific projects. For nuclear newcomer countries, these roadmaps assume that a Member State has already developed, or is at least well along the way to developing, the infrastructure necessary to carry out a nuclear powe…
The objective of this publication is to provide specific guidance for accident analysis for nuclear power plants with pressurized water reactors, taking into account the specific design features of these reactors. This guidance covers all steps required to perform such analyses, including selection of initiating events, acceptance criteria, computer codes, modelling assumptions, preparation of …
The objective of this report is to facilitate a recognition of priority management issues which, when not adequately recognized and addressed, can result in problems in operational performance at nuclear power plants. It provides a number of effective practices, reflecting the positive experience of nuclear power companies, that have prevented or corrected problems related to selected managemen…