Information System on Occupational Exposure (ISOE)


    The ISOE provides a forum for radiological protection (RP) professionals from nuclear electricity utilities and national regulatory authorities worldwide to share dose reduction information and operational experience to improve the optimisation of worker radiological protection at nuclear power plants. The ISOE provides its members with:

    • a forum for global co-operation among utilities to exchange information, experience and good practice in optimisation of worker radiological protection;
    • a "one-stop" information exchange website ( providing registered users access to ISOE products and user information exchange forums;
    • supported access to global ISOE resources through the ISOE Technical Centres.


    The ISOE was launched in 1992 by the OECD Nuclear Energy Agency (NEA) to improve the management of occupational exposures at nuclear power plants through the collection and analysis of occupational exposure data and trends, and through the exchange of lessons learnt among utility and national regulatory authority experts. Since 1993, the International Atomic Energy Agency (IAEA) has co-sponsored the ISOE programme, thus allowing the participation of utilities and authorities from non-NEA member countries.

    Membership and organisation

    The ISOE participation includes nuclear electricity utilities and national regulatory authorities which participate under the ISOE Terms and Conditions. Official participants include (as of June 2015):

    • 76 utilities in 29 countries (349 operating reactors, 57 shutdown reactors);
    • 22 regulatory authorities in 20 countries.

    The ISOE operates in a decentralised manner. A management board of representatives from all participants, supported by the NEA and the IAEA, provides overall direction. Four ISOE technical centres (Asia, Europe, the IAEA and North America) manage the programme's day-to-day technical operations. National co-ordinators in each country serve as contact points for the transfer of information from and to participants.

    The ISOE is jointly sponsored by the NEA and the IAEA.

    ISOE Terms and Conditions (2016-2019)

    Main activities

    Built on a global network of RP professionals from nuclear electricity utilities and national regulatory authorities, ISOE provides the world's most comprehensive source of experience, information and data for occupational exposure management at nuclear power plants. The ISOE provides an operational experience base for identification and assessment of good practices and facilitates the input of operational experience into the development of radiological protection recommendations, standards, etc.

    The ISOE facilitates global co-operation between utilities, the sharing of experience and the building of linkages between ISOE regions to develop a global approach to ALARA exposure management.  The ISOE offers its members a variety of relevant resources, including:

    For more information on the ISOE programme


    For past annual reports, please visit the ISOE website.

    Past event