ISOE Expert Group on Occupational Radiation Protection in Severe Accident Management and Post-accident Recovery (EG-SAM)

Background

Information System on Occupational Exposure (ISOE) provides a forum for radiation protection 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. In addition, ISOE with its participating utilities and regulatory authorities is a core group in developing safe, sustainable and societally acceptable strategies for emerging issues in the field of occupational radiation protection.

At its meeting in May 2011, the ISOE Bureau was presented a new proposal dealing with the current situation at the Fukushima Daiichi nuclear power plant to provide a view on management of high radiation area worker doses. The proposal on occupational radiation protection in severe accident management and post-accident recovery was introduced and discussed in detail by indicating that similar other effective ISOE expert group reports on Radiological Work Management at Nuclear Power Plants, ISOE, with a new ad-hoc expert group, could address the experience of various ISOE utilities with various RP management approaches for highly contaminated areas, selection of proper RP protective tools and clothes including remotely operated instruments, means to fix and eliminate contamination, access procedures to the site, shielding, emergency/accident individual dosimetry and its assessment, psychological aspects, etc.  Members of the ISOE Bureau also noted that severe accident management should not be viewed only with respect to technical issues, but also from the worker perspective. Consequently, psychological aspects need to be assessed and addressed.

The ISOE Bureau welcomed the proposal and also decided that close collaboration with the CRPPH Working Party on Nuclear Emergency Management (WPNEM) is necessary for this work. It is also indicated that the WGDA may take a leading role in assigning the experts and also work of the group with the active participation of the ISOE Technical Centers.  It was noted that this activity would benefit from broad ISOE participation to ensure that the final product would be cohesive and valuable, and it was requested that a call for nominations be sent by the Secretariat to the full Management Board. Following this direction, a call for nominations to the newly established ad-hoc Expert Group on Occupational Radiation Protection in Severe Accident Management and Post-accident Recovery (EG-SAM) was sent to the ISOE membership in December 2011.

Objective of the group

The objective of the ad-hoc EG-SAM is to develop a report on best radiation protection management procedures for proper radiation protection job coverage during severe accident initial response and recovery efforts to identify good radiation protection practices and to organise and communicate radiation protection lessons learned from previous reactor accidents.

The outcome of the work will be a new ISOE publication on Occupational Radiation Protection in severe accident management that will find broad use within the NPP radiation protection community. 

Planned work of the expert group

The EG-SAM will undertake its work by:

RP Management on an highly contaminated / irradiated area
RP equipment needed on site
  • For monitoring individuals
  • For monitoring site and other affected areas
Emergency procedures dosimetry prevision (the post accident situation "normal" procedures)
Remote tooling available
Sites stress tests dosimetric impact
Crew stress management
Identifying all significant non-controlled release sources
Means to fix and eliminate contamination
Access procedures to the site
Monitoring of high dose rate areas, pinpoint hot spots
Shielding  and blocking of high dose rate areas
Declaration of new controlled areas and zoning
Selection of persons to act in emergency organisations and be exposed above normal annual dose limit
Fukushima Data Collection and Analysis
  1. Data Collection
    1. Dose Data
    2. Plant Data
    3. TEPCO Data
    4. Government Data
    5. Accident Survey Committee (Hatamura Reports)
    6. JNES Reports
    7. Others
  2. Analysis
    1. Occupational Exposure Analysis

Last reviewed: 9 March 2012