Hwaseong-si, Republic of Korea
6 - 9 May 2013
In an effort to further develop an IAEA Technical Report entitled "Accident Monitoring Systems for Nuclear Power Plants," a Technical Meeting was held at Doosan Heavy Industries & Construction Co. Nuclear I&C Headquarters from 6-9 May 2013. The objective of the Report is to give a comprehensive overview of accident monitoring instrumentation for NPPs and to provide guidance to Member States in this area. It describes the basic principles of accident monitoring, the methodology for implementing accident monitoring instrumentation, subjects to be considered during the design of such instrumentation, example designs, operating experience, and areas where new methodologies or technologies may be needed.
Prior to the Technical Meeting, a Consultancy Meeting was held in March at the IAEA to develop the basic outline into a full draft report. The Consultancy Meeting was attended by participants from seven countries: Belgium, France, Germany, Japan, the Republic of Korea, the UK, and the USA.
The Technical Meeting served as a follow-up to the Consultancy Meeting and was attended by 46 participants from 16 countries.
This Technical Meeting provided a forum for interested Member States to discuss commonly encountered difficulties and to share best practices or strategies used in the design and implementation of accident monitoring systems, as well as to disseminate information on the lessons learned through the work with the new Technical Report. Participants provided a number of valuable comments and information which were incorporated into the draft report.
In the plenary morning sessions, the subjects were introduced by keynote speakers, and, during the later sessions each day, there were parallel interactive working groups on topics linked to the subjects.
Participants’ presentations showed that while accident monitoring systems are well designed for design basis conditions, there are still several aspects that need to be addressed for design extension conditions (i.e. a robust design particularly of instrumentation located in the containment and adjacent rooms) in order to ensure reliable functioning of the accident instrumentation under severe accident conditions and thereafter in the long term. New technologies to improve survivability of nuclear instrumentations under severe accident conditions are needed to ensure information about the status of the safety barriers.
The IAEA Technical Report will address the above issues and provide relevant information and guidance as well as examples on accident monitoring system designs. An IAEA Consultancy Meeting is planned for December 2013 to finalize the report and prepare it for publication.