The Strålsäkerhetsmyndigheten (Swedish Radiation Safety Authority, abbreviated SSM) is the Swedish government authority responsible for radiation protection, nuclear safety, nuclear security and safeguards. It reports to the Ministry of Climate and Enterprise and is based in Solna outside Stockholm.

Origin and mandate

SSM was formed on 1 July 2008 through the merger of two predecessor authorities: SKI (Statens kärnkraftinspektion, the Swedish Nuclear Power Inspectorate, founded 1974) and SSI (Statens strålskyddsinstitut, the Swedish Radiation Protection Institute, founded 1965). The combined remit covers everything from operating boiling-water reactors at Forsmark and Ringhals to dental X-ray equipment, solarium operation, and high-voltage power-line magnetic fields.

The legal foundations are the Strålskyddslagen (Radiation Protection Act, SFS 2018:396, replacing the 1988 act) and the Kärntekniklagen (Nuclear Activities Act, SFS 1984:3). Both acts delegate detailed technical rules to SSM via the SSMFS rule series, which is the binding regulatory instrument for licensees.

Supervisory structure

SSM regulates by licence: any activity involving ionising radiation above defined thresholds requires either notification (anmälningspliktig) or a licence (tillståndspliktig). The authority supervises through inspections, technical reviews, mandatory periodic safety reviews, and decisions on individual permits and amendments. Significant decisions on the operating reactor fleet — including the post-Fukushima "Independent Core Cooling" requirements — are taken by SSM's management or, for the most important matters, by the agency Director-General.

Independent expert review is provided by the Council of Nuclear Safety and Radiation Protection (Rådet för säker hantering av kärnavfall, etc.), and SSM funds its own external research programme so that staff can challenge licensee evidence on reactor safety, severe accidents, radiation protection, waste, and emergency preparedness.

Key regulations and supervisory areas

Material areas under direct SSM supervision include:

  • Operating commercial nuclear power reactors at Forsmark (units 1-3) and Ringhals (units 3-4); decommissioning at Barsebäck, Oskarshamn 1-2, Ågesta and Studsvik.
  • Spent fuel management — central interim storage (Clab) and the planned deep geological repository at Forsmark using the KBS-3 method.
  • Short-lived radioactive waste — the SFR repository at Forsmark.
  • Medical use of ionising radiation (X-ray, CT, fluoroscopy, nuclear medicine, radiotherapy).
  • Industrial sources, research, education, and transport.
  • Non-ionising radiation: UV from solarium, laser pointers, magnetic fields, and aesthetic treatments.
  • Emergency preparedness, including the iodine-tablet pre-distribution programme around reactor sites.

Forskrifter — the SSMFS rule series

Detailed technical rules are issued as SSMFS (Strålsäkerhetsmyndighetens författningssamling), the binding rule series since 2008. New regulations for nuclear power reactor design (SSMFS 2021:4), operation (SSMFS 2021:6), waste management (SSMFS 2021:7) and emergency preparedness (SSMFS 2014:2) reflect the lessons drawn from Fukushima Daiichi and ongoing international developments.

International cooperation

SSM participates in IAEA peer reviews (IRRS) and convention reporting (Convention on Nuclear Safety, Joint Convention), in the OECD NEA working parties, and in WENRA harmonisation of reactor and waste reference levels. Nordic cooperation with STUK (Finland), DSA (Norway), Geus (Denmark) and Geislavarnir (Iceland) is institutionalised through joint exercises and shared technical reports.