The EnBW Strategyfor Decommissioningand DismantlingofNuclearPower Plants»

Transcription

1 The EnBW Strategyfor Decommissioningand DismantlingofNuclearPower Plants» 40 th MPA-Seminar Stuttgart, 6 th & 7 th October2014 Peter Daiß, EnBW Kernkraft GmbH

2 Content 1. Introduction and Company Profile 2. Decommissioning Strategy Dismantling Strategy Disposal of Waste Strategy Licencing Strategy 3. Decommissioning in Practice NPP Obrigheim(KWO) 2

3 Introduction and Company Profile 3

4 EnBW is a European Utility with Solid Shareholders Germany s third largest utility; in Europe within TOP 10 Business activities in several European countries (D, CZ, TR, CH, A, H) Four business segments: Generation & Trading, Renewable, Grids, Sales Approximately employees In 2013 annual revenue >20 billion Euro and EBITDA >1.9 billion Euro Two strong main shareholders 4

5 Wide Balanced Portfolio is the Corporate Backbone The four Business Segments Generation and Trading Fully and partly owned power stations and long-term procurement agreements Installed capacity: 9,320 MW conventional 3,333 MW NUCLEAR 5,431 employees Renewable Energies Construction and operating renewable energies (wind on/offshore, hydro power) 1,059 MW installed capacity 485 employees Grids Transport and distribution of electricity and gas Grid-related services, operation grids for third parties and water supply services 155,000 km electricity grid 16,000 km gas grid 7,487 employees Sales Sale of electricity and gas 5 million customers 51.1 TWh electricity sales 67.7 TWhgas sales 3,461 employees Source: EnBW Annual Report

6 Nuclear Business in Transformation From Power Operation to Decommissioning Obrigheim (KWO) Philippsburg(KKP) Neckarwestheim(GKN) KWO Pressurized water reactor Power rating: 357 MW Start of operation: 1969 End of operation: 2005 In decommissioning In post-operation In operation KKP 1 Boiling water reactor Power rating: 926 MW Start of operation: 1979 End of operation: 2011 KKP 2 Pressurized water reactor Power rating: 1468 MW Start of operation: 1984 End of operation: 2019 GKN I Pressurized water reactor Power rating: 840 MW Start of operation: 1976 End of operation: 2011 GKN II Pressurized water reactor Power rating: 1400 MW Start of operation: 1989 End of operation:

7 Decommissioning Strategy 7

8 Three Strategies to be considered A Dismantling Strategy B Disposal of Waste Strategy C Licencing Strategy 8

9 A Dismantling Strategy Two Options: Immediate Dismantling and Safe Enclosure Final Shutdown Decommissioning License Power Operation Postoperational Phase Decommissioning Dismantling R a Preparation Safe Enclosure Dismantling R 30 a R Release from nuclear regulatory control a 9

10 A Dismantling Strategy Two Options - one Decision: Immediate Dismantling Criteria Availability of qualified personnel and suppliers Political and public acceptance Certainty of cost calculation Benefit of decay (dismantling costs) Reduction of activity inventory due to decay Risk of changes in legal framework Planned future use of the site etc. EnBW s Decision: Immediate Dismantling 10

11 B Disposal of Waste Strategy Simplified Model of the Main Waste Mass Flow Example: Medium Sized Pressurized Water Reactor 60% Conventional Scope 60% Clearance 98% Recyclable Material 40% Nuclear Scope Total Mass 300, ,000 Mg Decontamination 37% 2% 1% Conventional Disposal / Incineration National Repository 100% 1% (Konrad) 11

12 B Disposal of Waste Strategy The concept: Cost-efficiency and Independence Buffer Area Radioactive Residues Treatment Plant Clearance Radioactive Waste Storage Building Recycling Conventional Disposal National Repository (Konrad) On-site Off-site 12

13 B Disposal of Waste Strategy The EnBW swaste Strategy requires significant New Build Projects Radioactive Residues Treatment Plant Radioactive Waste Storage Building Auxiliary Buildings Concept Study 13

14 C Licencing Strategy Application for the Decommissioning Licence involves several Stakeholders Legal Requirements Atomic Energy Act 7(3): License for decommissioning and dismantling License Authority Ministry of the Environment, Climate Protection and Energy Sector Baden-Württemberg Authorised Experts TÜV Süd Energietechnik Stuttgart/Mannheim Öko-Institut Darmstadt Duration for Preparation of the Application Documents approximately 24 months Duration for Review of the Application Documents estimated 24 to 36 months New Build Projects Independent authorisation procedures 14

15 C Licencing Strategy Application for Decommissioning Licencerequires absolute Consistency Decommissioning and Dismantling Issues Scope and course of action Radiological categories, activated material Radiation exposure and emissions Storage and transportation of radioactive material etc. Supplements to the Operations Manual Decommissioning procedure Radiation protection regime Waste management organisation Safety report Public Participation Environmental Impact Scoping process Environmental impact analysis Environmental impact assessment 15

16 Decommissioningin Practice: NPP Obrigheim(KWO) 16

17 NPP Obrigheim(KWO) Decommissioning Separated in four Scopes Power Operation 1968 to 2005 Post-operational Phase 2005 to 2008 Decommissioning and Dismantling 2008 to ca. 2020/2025 Conventional Use/ Demolition after 2020/ st Dismantling Scope 2 nd Dismantling Scope Applied 12/2004 Granted 8/2008 Applied 12/2008 Granted 10/ rd Dismantling Scope 4 th Dismantling Scope Applied 03/2010 Granted 04/

18 NPP Obrigheim, 1 st Dismantling Scope Conventional Components and Systems Examples steam turbine feedwater and steam piping tanks, vessels heat exchangers, pumps etc. 18

19 NPP Obrigheim, 1 st Dismantling Scope Disassembly of the Steam Turbine before after 19

20 NPP Obrigheim, 1 st Dismantling Scope Disassembly of FeedwaterStorage Tank and Superheater 20

21 NPP Obrigheim, 2 nd Dismantling Scope Contaminated Components and Systems Examples steam generators main cooling water cycle auxiliary nuclear systems 21

22 NPP Obrigheim, 2 nd Dismantling Scope Removal of Steam Generators, Main Coolant Piping 22

23 NPP Obrigheim, 2 nd Dismantling Scope Transport of Steam Generator 23

24 NPP Obrigheim, 3 rd Dismantling Scope Activated Components Examples reactor pressure vessel biological shielding structure Fuel pool structure 24

25 NPP Obrigheim, 3 rd Dismantling Scope Disassembling of reactor pressure vessel Technology remote operation under water cutting 25

26 NPP Obrigheim, 4 th Dismantling Scope Remaining Components and Systems Examples Electrical power supply ventilation systems building cranes etc. 26

27 Thank you for your kind attention! 27