What is nuclear safety case?

Nuclear Safety Definition Case 5, 1 Nuclear safety case is a term used to encompass all documentation developed by a designer, licensee, or rights holder to demonstrate high standards of nuclear safety (including radiological) and radioactive waste management. Regardless of the type of disposal facility, a robust security case is built on multiple barriers and security features for in-depth defense. These include a stable waste form to limit the rate of release, a waste package to provide containment, a buffer to protect the container, and geological barriers to isolate debris. A multifactorial safety case must also present multiple independent arguments to ensure safety, including presentation and analysis of scientific research, comprehensive detailed system modelling, and studies of natural analogs.

The safety case outcome defines the safe operational envelope of the plant or activity, identifying the limits and conditions that must be maintained to ensure nuclear safety. As in all other industries, the design and operation of nuclear power plants aims to minimize the risks associated with routine operations or potential accident scenarios. The safety case can range from a single document that justifies a relatively simple activity or modification to thousands of documents that present the entire safety assessment, supporting analysis and evidence that justifies the safe operation of a nuclear reactor. One of the conditions of which is that the licensee (the licensee) have appropriate provisions for the production and evaluation of nuclear safety cases.

In the nuclear industry, safety depends on intelligent planning, proper design and backup systems, operational resilience, high-quality components, and a well-developed safety culture. At the end of the nuclear fuel cycle, it is necessary to ensure the safety of radioactive waste at all stages, including its final disposal. These specialized consultants ensure that the safety case documentation needed to support large-scale construction activities for nuclear new construction sites is robust, complete and meets rigorous regulatory expectations. CRA has a team of nuclear safety case specialists with experience in providing security and warranty services to customers in the UK's civil and defense nuclear sectors, as well as internationally.

There is a requirement for all nuclear licensing sites and other facilities that pose a radiation release hazard to the public or workers to possess and maintain a valid safety case.