Cov-ISOE 2004 6069 5/10/05 15:53 Page 1 Radiation Protection AIEA IAEA Occupational Exposure Management at Nuclear Power Plants OECD Nuclear Energy Agency International Atomic Energy Agency Fourth ISOE ISOE European Symposium Lyon, France INFORMATION SYSTEM ON OCCUPATIONAL EXPOSURE 24-26 March 2004 NUCLEAR•ENERGY•AGENCY Radioactive Waste Management Occupational Exposure Management at Nuclear Power Plants Fourth ISOE European Workshop Lyon, France 24-26 March 2004 Organised by the European Commission and the European Technical Centre (CEPN) © OECD 2005 NEA No. 6069 NUCLEAR ENERGY AGENCY ORGANISATION FOR ECONOMIC CO-OPERATION AND DEVELOPMENT ORGANISATION FOR ECONOMIC CO-OPERATION AND DEVELOPMENT The OECD is a unique forum where the governments of 30 democracies work together to address the economic, social and environmental challenges of globalisation. The OECD is also at the forefront of efforts to understand and to help governments respond to new developments and concerns, such as corporate governance, the information economy and the challenges of an ageing population. The Organisation provides a setting where governments can compare policy experiences, seek answers to common problems, identify good practice and work to co-ordinate domestic and international policies. The OECD member countries are: Australia, Austria, Belgium, Canada, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Korea, Luxembourg, Mexico, the Netherlands, New Zealand, Norway, Poland, Portugal, the Slovak Republic, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States. The Commission of the European Communities takes part in the work of the OECD. OECD Publishing disseminates widely the results of the Organisation’s statistics gathering and research on economic, social and environmental issues, as well as the conventions, guidelines and standards agreed by its members. * * * This work is published on the responsibility of the Secretary-General of the OECD. The opinions expressed and arguments employed herein do not necessarily reflect the official views of the Organisation or of the governments of its member countries. NUCLEAR ENERGY AGENCY The OECD Nuclear Energy Agency (NEA) was established on 1st February 1958 under the name of the OEEC European Nuclear Energy Agency. It received its present designation on 20th April 1972, when Japan became its first non-European full member. NEA membership today consists of 28 OECD member countries: Australia, Austria, Belgium, Canada, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Luxembourg, Mexico, the Netherlands, Norway, Portugal, Republic of Korea, the Slovak Republic, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States. The Commission of the European Communities also takes part in the work of the Agency. The mission of the NEA is: to assist its member countries in maintaining and further developing, through international co-operation, the scientific, technological and legal bases required for a safe, environmentally friendly and economical use of nuclear energy for peaceful purposes, as well as to provide authoritative assessments and to forge common understandings on key issues, as input to government decisions on nuclear energy policy and to broader OECD policy analyses in areas such as energy and sustainable development. Specific areas of competence of the NEA include safety and regulation of nuclear activities, radioactive waste management, radiological protection, nuclear science, economic and technical analyses of the nuclear fuel cycle, nuclear law and liability, and public information. The NEA Data Bank provides nuclear data and computer program services for participating countries. In these and related tasks, the NEA works in close collaboration with the International Atomic Energy Agency in Vienna, with which it has a Co-operation Agreement, as well as with other international organisations in the nuclear field. © OECD 2005 No reproduction, copy, transmission or translation of this publication may be made without written permission. Applications should be sent to OECD Publishing: [email protected] or by fax (+33-1) 45 24 13 91. Permission to photocopy a portion of this work should be addressed to the Centre Français d’exploitation du droit de Copie, 20 rue des Grands Augustins, 75006 Paris, France ([email protected]). FOREWORD The Information System on Occupational Exposure (ISOE) was created in 1992 to provide a forum for radiation protection experts from both operating organisations and national regulatory authorities to discuss, promote and co-ordinate international co-operative undertakings in the area of worker protection at nuclear power plants. The ISOE System is promoted and sponsored by the OECD Nuclear Energy Agency (NEA) and the International Atomic Energy Agency (IAEA), which provide a Joint Secretariat for the programme. Since 1997, ISOE has developed a programme of annual workshops and symposia for radiation protection professionals from all types of nuclear power plants. Attendees also include contractors and regulatory staff. The workshops and symposia are held alternatively in North America and in Europe. The European workshops are co-organised by the European Technical Centre and the European Commission, which provides a substantial financial contribution. The IAEA supports the workshops and symposia by providing financial help for participants from countries participating in ISOE through the IAEA and also for participants from target countries of two IAEA Technical Co-operation Projects aimed at enhancing occupational radiation protection in nuclear power plants. These workshops and symposia have given hundreds of professionals an opportunity to listen to oral presentations (about 30 in each workshop), exchange information, share ideas and learn from others. The workshops’ concept, with contributions from and for the radiation protection professionals, has proven to be very effective. The discussions on selected topics in small groups in Europe and the practical ALARA training sessions in North America have contributed to the success of the programme. The 2004 International ALARA Symposium was held from the 24-26 March 2004 in Lyon, France. The symposium with the theme “Occupational Exposure Management in Nuclear Power Plants” was organised by the European Technical Centre in order to provide a global forum to promote the exchange of ideas and management approaches to maintaining occupational radiation exposures “as low as reasonably achievable” (ALARA). The symposium was sponsored by the European Technical Centre (ETC), the OECD/NEA and the IAEA. The workshop enjoyed several varied oral and poster presentations. The success of this Workshop is largely due to the important organisational support from the Électricité de France. 3 TABLE OF CONTENTS TABLE OF CONTENTS Foreword ........................................................................................................................................ 3 SESSION I...................................................................................................................................... 7 K. Komori Introduction of JNES in Japan............................................................................................... 9 E. Lazo, C.G. Lindvall Operational Radiological Protection and Aspects of Optimisation....................................... 15 K. Alm-lytz, O. Vilkamo Regulatory Requirements for Radiation Safety in the Design of a New Finnish NPP.......... 19 J. Sovijärvi The Fifth Nuclear Power Plant in Finland from the Radiation Protection Pointy of View... 27 G. Valtchev, M. Neshkova, A. Nikilov Modernisation of the Accident Localisation System and Relevant Dose Exposure on Unit 4 of KNPP ................................................................................................................ 31 SESSION II.................................................................................................................................... 35 S. Bushart, D. Hussey Highlights of EPRI Radiation Exposure Management Programme ...................................... 37 H. JDQåHNRYLþ, M. KULåPDQ Comparison of Performance Indicators of Different Types of Reactors Based on ISOE Database....................................................................................................................... 45 C. Lefaure, L. D’Ascenzo, P. Crouail ,G. Cordier, J. Lebeau, A. Rocher, G. Machicoane Multifactorial Analysis of Occupational Outage Doses Dispersion in the French NPPS 1998-2002.............................................................................................................................. 51 I. Lund, S. Erixon, T. Godås, P. Hofvander, L. Malmqvist, I. Thimgren, H. Ölander Occupational Radiation Protection at Swedish Nuclear Power Plants: Views on Present Status and Future Challenges.................................................................................... 59 5 SESSION III................................................................................................................................... 67 V. Simionov Management of Tritium Exposures for Professionally Exposed Workers at Cernavoda 1 NPP .................................................................................................................. 69 M. Luszik-Bhadra, M. Boschung, M. Coeck, G. Curzio, D. Derdau, F. D’errico, A. Fiechtner, J.-E. Kyllönen, V. Lacoste,