Welcome to the ISOE Website
The Information System on Occupational Exposure (ISOE) was created in 1992 to provide a forum for radiation protection professionals from nuclear electricity licensees and national regulatory authorities worldwide to share dose reduction information, operational experience and information to improve the optimisation of radiological protection at nuclear power plants.
ISOE is jointly sponsored by the OECD Nuclear Energy Agency and the International Atomic Energy Agency.
Latest news
2027 ISOE International Symposium
January 19-22, 2027
Palo Verde Energy Education Center, USA
Organised by the North-American Technical Centre (NATC)
> Hotel Reservations
- Fairfield by Marriott Inn & Suites, Buckeye (hotel detail: 1550 N. Verrado Way, Buckeye, AZ 85396; phone: 623-288-9100; new hotel, very close to event location; Hotel Reservations can be made via the following link: Book your group rate for Radiation Safety Symposium
- Hampton Inn & Suites by Hilton (hotel detail: 21245 W. Roosevelt Street, Buckeye, AZ 85326; phone: 623-335-9330; new hotel walking distance to event location; Hotel Reservations can be made via the following link: Hampton(Hilton)
Contacts: Amy KEEP or David MILLER
2026 ISOE International Symposium
16-17 June 2026
Helsinki, Finland
Organised by the ETC Technical Centre in collaboration with Fortum, TVO and STUK.
> Program
> Registration Form (online registration)
(in case of problem with online registration, please contact us at the following address: isoe@cepn.asso.fr)
> Booth Request Form (online registration)
> Accommodation
Hotel rooms can be booked at the venue where the symposium will take place.
Participants can reserve a room by emailing the reception at reception@hanaholmen.fi,
quoting the reference number: STUK2026
Price: 120€ Sun-Mon and 154€ for the rest of the week. The accommodation includes hotel breakfast, sauna & pool.
Cutoff date for special rate is 10 May 2026.
- RPM and Regulatory Body Meetings on June 15, 2026 (free of charge)
Please contact the relevant contact-person for more information and registration.Radiation Protection Managers Meeting
Contact-person:
Timo KONTIO, Loviisa NPP – Email: timo.kontio@fortum.comRegulatory Body Representatives Meeting
Contact-person:
Veli RIIHILUOMA, STUK – Veli.Riihiluoma@stuk.fi
- Technical visit to Olkiluoto NPP on June 18, 2026
Number of participants is limited.
Contact: Lucie D’ASCENZO
New publications
The following publications are available:
- WGDECOM, Apr. 9-10, 2025 (ISOE Members only)
- ISOE Annual Report, 2021
2026 ISOE North American Symposium
13-15 January 2026
Clearwater Beach, USA
Organised by the North-American Technical Centre (NATC)
> RPM meeting Agenda – RPM meeting Cover invitation letter
Contacts: Amy KEEP or David MILLER
New section: RP Events
A new section presenting the RP Events has been created in RP Library.
Following a request from some ISOE members wishing to share radiation protection events during training sessions, ETC has extracted a list of RP Events from various documents available on the site (Presentations during Management Board, Symposium Proceedings, ISOE Annual Reports, OpEx Reports), for the period 2000-2020.
RP Events are presented in a table providing a short description of the event and where it occurred (Country, Plant). It is possible to directly open from this page the associated reference document using the appropriate link.
In addition, a first attempt of RP Events description specifying Causes, Consequences, Corrective actions are also given in an Excel file.
Information are restricted to ISOE Members. 
Next ISOE meetings
- 36th ISOE Management Board
8-10 December 2026 (OECD NEA, France)
Upcoming Events
2027 ISOE International Symposium
19-22 January 2027, USA
For ISOE Members – Submission Deadlines
- Country reports are expected by end of June 2026
- ISOE Questionnaires are expected by end of September 2026