The Swedish NGO Office for Nuclear Waste Review. 0 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
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1 The Swedish NGO Office for Nuclear Waste Review 0 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
2 Considerations on nuclear waste management in Sweden Dr. Johan Swahn, Director The Swedish NGO Office for Nuclear Waste Review (MKG) mobile: The Swedish NGO Office for Nuclear Waste Review (MKG) Box 7005, SE Göteborg, SWEDEN, Tel: , Fax: Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
3 Introduction The Swedish NGO Office for Nuclear Waste Review, MKG, was created by the largest Swedish environmental NGO, the Swedish Society for Nature Conservation (Naturskyddsföreningen), to work specifically with nuclear waste issues. (MKG = Miljöorganisationernas kärnavfallsgranskning in Swedish) MKG receives funding from the Swedish Nuclear Waste Fund to participate in the consultation process for a proposed Swedish repository for spent nuclear fuel near the Forsmark nuclear power plant. The Swedish nuclear waste company, SKB, has declared that they, after over 30 years of development and siting work, intend to file an application for a license for the repository on March 16 th In the licensing review a number of issues of environmental concern will have to be addressed. 2 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
4 Long-term environmental concerns for the final disposal of spent nuclear fuel Radiation risks for hundreds of thousands of years Nuclear weapons proliferation risks for over one hundred thousand years Chemical risks for all future time 3 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
5 Management of nuclear waste in Sweden By law, the Swedish nuclear industry is responsible for managing and finding a sustainable method for final disposal of the nuclear waste. An economic system with a state-controlled Nuclear Waste Fund has been set up to guarantee that the polluter-pays-principle is upheld. The Swedish nuclear industry has given the task of solving the nuclear waste problem to an industry-owned nuclear waste company SKB. In Sweden the spent nuclear fuel is to be directly disposed of on a geologic repository (no reprocessing). SKB has been working for over 30 years on developing a method (the KBS method) for a repository and finding a site for the disposal of Swedish spent nuclear fuel. Finland also wants to uses the KBS method, but rely entirely on the Swedish safety analysis to be approved. 4 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
6 Management of Nuclear Waste in Sweden LOW-LEVEL NUCLEAR WASTE Source:SKB 5 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
7 Management of Nuclear Waste in Sweden Source:SKB SFR Final repository for low-level nuclear waste at the Forsmark nuclear power plant 6 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
8 Management of Nuclear Waste in Sweden SPENT NUCLEAR FUEL Source:SKB 7 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
9 Management of Nuclear Waste in Sweden Source:SKB CLAB Intermediate storage of spent nuclear fuel at the Oskarshamn nuclear power plant 8 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
10 Management of Nuclear Waste in Sweden THE NEXT STEP? A FINAL REPOSITORY FOR SPENT NUCLEAR FUEL Source:SKB 9 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
11 The KBS Method The KBS method was developed in the 1970s. The basis is geologic repository at about 500 m depth in granite bed-rock. The long-term safety is to be guaranteed by artificial barriers copper canisters surrounded by a bentonite clay buffer Source: MKG 10 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
12 Siting of a Swedish Spent Fuel Repository After a long history of siting failures, the nuclear company SKB has since the turn of the century been carrying out site investigations at two sites, both right adjacent to a nuclear power plant. In June 2009 Forsmark was chosen for a repository, with an encapsulation plant to be built at Oskarshamn. Source: MKG/Mikael Kårelind, Ummagumma SFR CLAB Forsmark nuclear power plant Oskarshamn nuclear power plant The planned Forsmark repository for spent nuclear fuel The nuclear industry is preparing to apply for permission to implement the KBS method at Forsmark on March 16 th Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
13 SKB Is Moving Forward to Licensing The nuclear waste company SKB has stated it plans to submit an application for licensing of a KBS repository in Forsmark on March 16 th The license application will be submitted to regulator (Swedish Nuclear Safety Authority) according to the Nuclear Act and to the Environmental Court according to the Environmental Act. The application means that the regulator will have legal grounds to act fully on the issues of concern that it has. A preliminary statement on the completeness of the application is expected after about three months. The whole license review process will likely take three years or more. The regulator and the court will only give recommendations to the Government. It is the Government that finally decides if a permit is to be given or not. Such a decision is likely to come not earlier than in Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
14 The KBS Method: Long-term Environmental Concerns (I) A final repository for spent nuclear fuel cannot be allowed to release harmful radioactivity for a period of over 100,000 years. A geologic repository in Swedish bedrock at a depth of 500 m has corrosive groundwater flowing through the repository. A repository using the KBS method therefore has to rely on manmade barriers (clay and copper) to isolate the nuclear waste from the environment. The chemical and biological environment will in the long term threaten the artificial barriers of copper and clay in ways that are difficult to foresee. There has been much discussion in Sweden and internationally the last few years concerning the fundamental SKB understanding that copper is essentially inert/immune to corrosion in the repository environment. The controversy remains unresolved but copper corrosion research results points to major problems. 13 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
15 The KBS Method: Long-term Environmental Concerns (II) In Sweden it is expected that there will be one or more ice ages during the next years. Glaciation will lead to extreme variations in the chemical and biological environment that will affect the man-made barriers. Glaciation during ice ages will also physically affect a repository (lateral movement, major earthquakes, permafrost). The uncertainties of long-term physical, chemical and biochemical impact on a KBS repository means that there are still a number of unanswered questions in the safety analysis. And not to forget... Spent nuclear fuel contains plutonium that poses a long-term nuclear weapons proliferation risk for over years. This means there will be monitoring and surveillance demands for an extended future. 14 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
16 Important Issues in the Licensing Process (I) Basic legal issues. Has the consultation process has been proper? Does the environmental impact statement meet legal standards? Will the complex model for the long-term safety analysis hold up to scrutiny (hundreds of thousands of years)? Are ice age scenarios covered in an appropriate way (permafrost, earthquakes)? Are scenarios for release of radioactivity and impact on the biosphere covered in an appropriate way? Can SKB show that the clay will not erode too fast during glaciation? Can the input data to the model be verified or at least made plausible (first years)? There is extremely weak experimental support for the fundamental idea that copper does not corrode in the repository environment. Will the clay swell and behave as predicted? SKB has major problems with the results of research on copper and clay. Will the copper corrode very fast during the hot first thousands of years as some researchers claim? 15 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
17 Important Issues in the Licensing Process (II) Issues related to intrusion scenarios, retrievability and need for long-term monitoring/information transfer to the future. Risks for unintentional or intentional intrusion have to be balanced with positive aspects of retrievability. Nuclear weapon proliferation risks with plutonium with the need for long-term monitoring. Siting issues SKB has to show that the site has been chosen in an appropriate way and is the best site. Alternative methods SKB has to show that is has dealt with alternative methods in an appropriate way. Are there better alternatives around the corner? Deep borehole disposal may have a higher long term environmental safety and be less problematic for unintentional or intentional intrusions. 16 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
18 What If There Are Major Problems? It is possible that major problems will appear in the review process. The licensing of the KBS method in Sweden is not a certainty. If the issues regarding copper corrosion are found to be too serious to give a go-ahead, is it possible for to SKB modify the KBS method or will the concept of using man-made barriers to achieve long-term safety have to be abandoned? The KBS system, with its reliance on man-made engineered barriers for long-term safety has allowed repository siting in almost any bedrock. This makes it easier to site in nuclear communities that may be more positive to a repository. Siting may be more difficult without the availability of the KBS method. Problems for the KBS method will affect the nuclear waste management systems in Finland, Canada, the UK, and elsewhere where the use of KBS method is planned or considered. 17 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
19 For More Information... English: Regulator: Industry: 18 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
20 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review 19 Johan Swahn, The Swedish NGO Office for Nuclear Waste Review, MKG
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