Design and Safety Assessment Review Service - DSARS
The IAEA provides the Design and Safety Assessment Review Service (DSARS) to assist and advise Member States in achieving and maintaining a high level of safety of nuclear power plants.
This service is organized in modules that cover the review of the design at different phases based on the IAEA safety standards.
DSARS – An Integrated Review Service
The objective of DSARS is to provide to the requesting Member State a tailored, independent peer review and assessment of the plant design safety and to make recommendations on additional actions/analysis to be performed. DSARS can assist countries in the following areas:
- Review of safety analysis in support of licensing
- Safety assessment in support of plant modifications
- Assessing actions taken to address emerging safety issues
- Establishing national regulations related to design and safety assessment
- Periodic safety review
The DSARS has been developed in support of stated Member States’ needs, and in response to the IAEA Action Plan as well as a review of NSNI services.
Upon request of a Member State organization the IAEA provides advisory services to review the design safety and safety assessments of power reactors against the IAEA Safety Standards. The services include and integrate the following complementary services in key technical safety assessment areas:
The objective of this DSARS module is to provide a detailed review of a reactor’s safety documentation for technical robustness, completeness, and comprehensiveness. The scope of this module can be tailored to support Member States’ needs, covering a preliminary safety analysis report, a full safety analysis report, specific chapters of the report, or specific technical topics. This can be done in support of licensing, plant modifications, safety upgrades, life extension, or in light of revised IAEA safety assessment and design safety requirements.
A specific model of DSR, GRSR, is offered for the review of safety cases (completely or partially developed) of new concepts that are not at the licensing stage yet. This review is focused on checking the status of the documentation (completeness and comprehensiveness).
The objective of this DSARS module is to provide a peer review on the adequacy of the treatment of technical and methodological issues in the Probabilistic Safety Assessment (PSA) and the results obtained. The results provide advice on the completeness and accuracy of a PSA. In addition, various PSA applications pursued by both utility and regulatory organizations may be a subject for the review.
The objective of this DSARS module is to provide a peer review on the completeness and adequacy of plant specific Severe Accident Management Guidelines and Emergency Operating Procedures (EOPs).
The objective of this DSARS module is to provide a peer review on the Periodic Safety Review performed by an operating organization.
Tailored to meet specific needs
Elements of the DSARS services provide the technical bases for tailoring the reviews to the different phases of a reactor project. Also elements from these services can be combined to address specific needs of a requesting Member State Organization or to reviewing the documentation of complete safety cases.
Conduct at various phases of a reactor project
The design and safety assessment reviews may be carried out at the various phases of a reactor project, e.g. at the conceptual design stage, during various pre-licensing phases, for reactors under construction or in operation and for reactors undergoing a periodic safety review or life extension. The services also offer to address specific technical aspects such as plans for plant modifications. The services make use of guidance documentation which provides guidance to the reviewers, includes references to related Agency standards, and refers to good practices.