IRSN, Institut de radioprotection et de sûreté nucléaire

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All our expertise to protect you

  • Ukraine: Report on fires in the Chernobyl exclusion zone

    ​In a press release on 21 March 2022, the Ukrainian safety authority SNRIU indicated that forest fires had been burning in the Chernobyl exclusion zone since 11 March, mainly in the central and west areas of the exclusion zone created after the accident in 1986.​​

    Learn more

  • Ukraine: Situation of the Zaporizhzhya NPP

    ​​​IRSN publishes a new information report providing details of the arrangements planned in the event of a total loss of external supplies at the Zaporizhzhya nuclear power plant.​​​

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  • Situation Chernobyl

    On 9 March at 11.22am, the Ukrainian nuclear safety authority SNRIU informed IAEA that the external power supplies of the Chernobyl plant facilities had been cut off. The site's emergency generators would be supplying power to the facilities, with enough fuel for 48 hours.​​

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  • Update on the risk situation regarding Ukrainian nuclear facilities


    Status on 7 March 2022
    The invasion of Ukraine by Russian troops demands careful monitoring of its nuclear installations. 

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  • Chernobyl, 35 years later

    ​​35 years after the Chernobyl nuclear accident, we review the situation with four information notes​.​​


  • Defence in Depth

    ​​​​​​Since the 1970s, "Defence in Depth" has been key to nuclear safety. It consists in establishing a series of independent lines of defense intended to prevent failures and, if prevention doesn't work, to limit the consequences of accidents through five levels of successive defenses.​​

    Watch our video

  • IRSN : all our expertise to protect you

    ​​​​​​IRSN, a public expert with industrial and commercial activities, was set up in 2001. Learn more about who we are and our missions.​


  • Fukushima, ten years later: our special issue

    ​​​​This accident, like those before it, has led IRSN to conduct extensive research and take action to enhance safety at nuclear facilities and radiological protection of people and the environment. We must do everything within our power to prevent accidents, even though there are no guarantees that they will not occur. In this special edition of Repères, we review the situation.

    Read our special issue

  • Annual report 2020

    ​​​​​​The annual report offers a comprehensive panorama of the year’s key events.


  • Kotoba, Dialogues in Fukushima


    ​​​​​How to respond to the daily challenges of long-term rehabilitation of living conditions in the territories affected by the accident at the Fukushima Daicchi nuclear power plant ?


    Consult our long form

  • Anticipation and resilience


    ​​What can be learned from the accident of the Fukushima Daiichi nuclear power plant to make nuclear facilities more robust and able to withstand extreme events, to improve post-accident management, and more generally to progress in risk management​?

    Download our report "Anticipation and resilience: considerations a decade after the Fukushima Daiichi accident"

  • Health consequences of a nuclear accident


    ​​​Numerous research programs and epidemiological studies were and are being conducted on the health consequences for first responders, workers, and affected populations following the Chernobyl accident in 1986 and the Fukushima Daiichi accident in 2011. This in-depth feature provides a summary of these studies.

    Read our in-depth content




    IRSN – Institute for Radiological Protection and Nuclear Safety – is the French national public expert in nuclear and radiological risks.

    As a research and expert appraisal organization, IRSN contributes to the implementation of public policies concerning nuclear safety and security and health and environmental protection against ionizing radiation.



  • Nuclear Safety

    Nuclear safety


    IRSN contributes to the safety of existing and future nuclear facilities through a wide range of activities: examining the files submitted by Operators of facilities in operation or under construction, supporting inspection teams from the French safety authority, contributing to the process of updating national and international regulations, developing research programs regarding the prevention of accidents...




    Radiation protection

    With ionizing radiation being found in such wide-ranging applications, radiation protection for workers and the public is an essential aspect of IRSN’s activity.


    IRSN is responsible for performing radiological monitoring of the environment throughout France, carries out research and analysis to better understand the exposure of workers exposed to radiation, and works to improve the conditions of patient exposure.


A global partner

North & South America

51 partnerships with American, Canadien and Cuban organizations.


Contracts and cooperations with NRC, DOE...


Africa & the Middle-East

3 partnerships with local authorities.


Contracts with NNR, FANR, STEG, CNESTEN...


Asia & Oceania

39 agreements with organizations from 6 countries.


European Union

153 agreements with organizations from 19 countries.


Contracts with BNRA, the Dutch Ministry of Economic Affairs, Agriculture and Innovation, GEN-Energija...


Outside European Union

42 partnerships with organizations from other European countries.


Contracts with SNRIU, Novarka...


IRSN  is a global player with 329 active cooperation agreements and contracts in 47 countries.


As a technical safety organization (TSO), IRSN is also operating scientific partnership and providing scientific cooperation and services through agreements with international organizations, and is a founding member or partner in 14 organizations and networks.

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Fields of activity

​IRSN contributes to the safety of existing and future nuclear facilities, and to radiological monitoring of the national territory and workers exposed to ionizing radiations.

IRSN offers its expertise and services in nuclear safety, human radiation protection and protection of the environment to authorities and industrials across the world.


IRSN is also an active partner in Riskaudit a jointly-owned subsidiary of IRSN and its German counterpart GRS, for international technical assessments >Riskaudit website


IRSN’s research focuses not only on acquiring new scientific knowledge, but also on developing technical tools required to control risks and help expand the Institute's expertise capabilities. These programs are adapted to take into account normative, regulatory, technological, industrial and social issues.