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  • 2021:10 Establishment and use of attention values in environmental fatigue assessments

    SSM perspective Background As Swedish NPPs reach their original technical design life, re-assessment of the fatigue life of structural components is needed for safe long term operation (LTO). In these re-assessments one must consider that new knowledge has shown that environmental effects on fatigue life must be considered. One common method to verify the fatigue life of structural components...

    Content type: Publications
  • 2022:11 Kingdom of Sweden IRRS ARM Summary Report 2022

    The IAEA Integrated Regulatory Review Service Mission to Sweden in November 2022...

    Content type: Publications
  • Fitness for work certificate – 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
  • Man-Technology-Organisation

    No technical safety systems can work without the close involvement of people and the surrounding organisation. This is why our regulatory supervision is based on how people work and the fact that quality and safety hinge on people, the specific context and organisation, alongside the technology itself. We always have this perspective when we review all aspects of nuclear power plant...

    Content type: Regular Pages
  • Discharges

    The Swedish Radiation Safety Authority sets constraints for discharges of radioactive substances and checks that the operator stays well below these constraints. We also require the nuclear facilities to make use of best available techniques for gradual reduction of discharges.

    Content type: Regular Pages
  • 2018:24 Structural equation modelling for analysis of human and organizational factors in nuclear power plant control rooms

    SSM perspective Background During the supervisory work of the Swedish Radiation Safety Authority (SSM), a need was identified to develop the methods used when evaluating control room work in the central control rooms of nuclear power plants. Benchmarking is commonly used today, with reference values from earlier Integrated System Validation (ISV), when ISV is available. Often, ISV performs...

    Content type: Publications
  • Pronouncement on repository applications made to the Swedish Government

    On 23 January 2018, the Swedish Radiation Safety Authority, SSM, in its capacity as a preparatory authority, submitted its pronouncement to the Government regarding SKB's licence applications for final disposal of spent nuclear fuel. SSM recommends approval of SKB's applications under the Act on Nuclear Activities for licences to construct a repository for spent nuclear fuel, located at...

    Content type: Regular Pages
  • 2010:16 Guidance to Risk-Informed Evaluation of Technical Specifications using PSA

    No guidance documents for risk-informed analysis and assessment of changes in Limiting Conditions for Operation (LCO:s) in TS (Technical Specifications) have been available in the Nordic countries. In the U.S. several guidance documents, primarily developed by the owners groups for PWRs and BWRs, exist. Guidance for analysis of TS changes in this report generally follows the U.S. Regulatory...

    Content type: Publications
  • 2015:20 Guide for thyroid monitoring in the event of release of radioactive iodine in a nuclear emergency

    This report aims to serve as a guide in the execution of a thyroid monitoring program during the intermediate phase of response to a nuclear emergency. Calibration factors for some instruments verified in the framework of the Nordic project THY- ROID (Nyander P. 2014) are listed here as an example. For different times after the intake, we present in this guide the measured values in net count...

    Content type: Publications
  • 2009:27 Analysis Strategy for Fracture Assessment of Defects in Ductile Materials

    SSM has supported research for investigating the role of secondary stresses when fracture assessments are performed for cracked structures made of ductile materials. There are evidences that indicate that some secondary stresses, such as weld residual stresses, are not as important as primary stresses for estimating the safety margin against rupture (measured by the J-integral) for the type...

    Content type: Publications