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2017:20 Assessment of inertia effects on transient clad-to-coolant heat transfer and coolant flow under reactivity initiated accidents
In this report, simple hydrodynamic models are used for studying the effects of coolant inertia on fuel-to-coolant heat transfer and coolant flow under reactivity initiated accidents in light water reactors. The objective is to assess if the inertia effects are important enough to warrant modification of QT-COOL, a coolant channel module for two-phase flow that has recently been implemented as...
Content type: Publications -
2017:16 Stress intensity factor solutions for circumferential cracks in cylindrical bars under axisymmetric loading and global bending
Background The case of a circumferential crack in a cylindrical bar has not been available in the ProSACC code. The need for such a geometry, especially considering nonlinear axisymmetric loading and global bending, has motivated the development of new stress intensity factor solutions, also known as K-solutions. These new K-solutions will be available in ISAAC, the successor to ProSACC.
Content type: Publications -
A step-wise review
The Swedish Radiation Safety Authority (SSM) prepares licence applications under the Swedish Act on Nuclear Activities to construct, possess and operate nuclear facilities. In our preparatory work, we assess whether applications meet our radiation safety requirements.
Content type: Regular Pages -
Health declaration – Work involving ionising radiation
You need Adobe Acrobat Reader in order to read and fill out PDF forms. SSM Svenska You need Adobe Acrobat Reader in order to read and fill out PDF forms.
Content type: Publications -
Licences for nuclear facilities
A licence is required to build, possess or operate a nuclear facility. Licensees must apply for a new licence if they make modifications that are beyond the scope of their current licence. This page contains information about the licensing process and how to apply for a licence.
Content type: Regular Pages -
Final repository for radioactive waste and spent nuclear fuel
One of the duties of the Swedish Radiation Safety Authority is to review the final disposal applications submitted to the Authority by Svensk Kärnbränslehantering AB (SKB). We review the applications with reference to the Swedish Act on Nuclear Activities and against our regulations, and issue pronouncements to the Swedish Government, which then makes licensing decisions.
Content type: Regular Pages -
Decommissioning
The Swedish Radiation Safety Authority issues regulations governing the planning and undertaking of dismantling activities; what’s more, the Authority performs checks to ensure that the licence holder takes responsibility for the safe decommissioning of the facility.
Content type: Regular Pages -
Nuclear facilities in operation in Sweden
At the present time, there are three nuclear power plants in operation in Sweden. These are the plants of Forsmark, Oskarshamn and Ringhals.
Content type: Regular Pages -
2026:06 A Human Reliability Analysis (HRA) Taxonomy for Small Modular Reactors (SMR) – Part 1 of 2: Mapping the SMR landscape
SSM perspective Background Small Modular Reactors (SMRs) are typically presented as a solution for safe and reliable energy, requiring less time to construct than the traditional large reactors. The inherent safety features, higher levels of automation and increased reliance on passive safety are often held as reasons for fewer operators being needed in the daily operations and for handling...
Content type: Publications -
2025:03 APRI-11 – Final Report
SSM perspective Background The Swedish Radiation Safety Authority together with the Swedish Power companies operating nuclear power reactors in Sweden have since early 1990’s provided financial support for severe accident research at KTH and Chalmers. The research was initiated almost directly after the installation of severe accident management system and strategy, as filtered containment...
Content type: Publications