The Information System on Occupational Exposure (ISOE) was created in 1992 to provide a forum for radiological protection professionals from nuclear electricity utilities and national regulatory authorities worldwide to discuss, promote and co‑ordinate international co-operative undertakings for the radiological protection of workers at nuclear power plants.

The objective of the ISOE is to improve the management of occupational exposure at nuclear power plants by exchanging broad and regularly updated information, data and experience on methods to optimise occupational radiological protection.

Download the  pdf ISOE Brochure (958 KB)

A general presentation of the ISOE System is available to be used by the members to present and promote ISOE Programme.

Download the  pdf ISOE General Presentation (3.24 MB)

ISOE Members

Membership in ISOE includes representatives from nuclear electricity utilities and national regulatory authorities.
As of December 2018, there are 78 utilities in 31 countries, as well as 28 regulatory authorities of 26 countries participating to the system.

ISOE Database

The ISOE database itself includes occupational exposure information for about 400 operating units and 80 shutdown units or in some stage of decommissioning in 29 countries, covering about 85% of the world’s operating commercial power reactors.

ISOE is jointly sponsored by the:

  • OECD Nuclear Energy Agency (NEA), and
  • International Atomic Energy Agency (IAEA).

ISOE Structure

ISOE operates in a decentralised manner. A Management Board of representatives from all participating countries, supported by the joint NEA and IAEA Secretariat, provides overall direction.

Four ISOE Technical Centres (Europe, North America, Asia and IAEA) manage the programme’s day-to-day technical operations, serving as contact point for the transfer of information from and to participants.


ISOE Products and benefits

ISOE is the world's most comprehensive source of experience and information for occupational exposure management at nuclear power plants, and offers its members a variety of resources for occupational exposure management.

ISOE Bureau, as of 2018 Management Board

Chairman of the ISOE System
United-Kingdom Guy RENN
Sizewell B NPP
Phone: +44 1728 653183
Chairman elected
United-Kingdom Bradley R. BOYER
Watts Bar NPP
Phone: +1 
Federal Authority of Nuclear Regulation (FANR)
Phone: +971 02 651 6620