SVAFO R2 Decommissioning Phase 1

Transcription

1 SVAFO R2 Decommissioning Phase 1 January 28th and 29th, 2015 Stephan Krüger AREVA Karlstein / Main (Germany) January 28th, 2015

2 Content 1. Project Introduction 2. Scope of Supply Special Equipment Special Tools On-site Performance 3. Time Schedule Project Milestones SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 2

3 Content 1. Project Introduction 2. Scope of Supply Special Equipment Special Tools On-site Performance 3. Time Schedule Project Milestones SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 3

4 Chapter 1 Project Introduction SVAFO facility at Studsvik area near Nyköping Research reactor R2-0 with nominal power of 1 MW th R2-0 Research reactor R2 with nominal power of 50 MW th Shutdown in 2005 after approx. 45 years of operation SVAFO R2 Decommissioning project is split in three phases: Phase 1: Decommissioning of reactors and removal of water in the pools (this project) Phase 2: Decommissioning of pool structures and biological wall (separate project right now in development) Phase 3: Decommissioning of remaining systems and decontamination of buildings inclusive free release (separate project later) R2 SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 4

5 Content 1. Project Introduction 2. Scope of Supply Special Equipment Special Tools On-site Performance 3. Time Schedule Project Milestones SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 5

6 General subject of scope SVAFO R2 Decommissioning, Phase 1 Planning and preparation of dismantling and segmentation of both swimming pool reactors R2-0 and R2 including ist surrounding installations Performance of dismantling and segmentation works on-site as well as separating the waste in the given waste streams, following the provided reference concept Performance limit is handling over of loaded transport flasks, baskets or components in the reactor hall Any provision of required flasks, baskets, waste containers and related equipment for e.g. drying is with SVAFO Overall task: Clearing of all 3 pools from R2-0, R2 and its surroundings SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 6

7 Special equipment for site performance Pool liner bottom & wall protection Working platform with table Water purification system Rough filtration equipment Fine filtration equipment Working platform: Reduction of working depth Facilitation and safety Consideration of risk for dropping of components SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 7

8 Special tools for site performance High torque impact screw driver Circular sawing equipment Hacksaw with gripper Hydraulic shear Nibbler SVAFO R2 Decommissioning, Phase 1

9 Working arrangement SVAFO R2 Decommissioning, Phase 1 Sawing equipment Working table R2 reactor R2-0 reactor Fine&Rough filtration Working platform Baskets Cassettes Wall & Bottom protection liner SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 9

10 On-site performance sequence for dismantling of R2-0 SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 10

11 On-site performance sequence for dismantling of R2 Firstly all outside components and penetrations top down SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 11

12 On-site performance sequence for dismantling of R2 Secondly after removal of cover plate all inside systems top down Followed by dismantling of vessel components all top down SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 12

13 On-site performance sequence for dismantling of R2 (example for dismantling of upper vessel) SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 13

14 Route 1 dose rate higher 2 Sv/h Route 2 dose rates between 2 Sv/h and 2 msv/h Route 3 dose rate lower 2 msv/h Flask of route 1 (type 2) Size: Ø 310mm x 760mm Weight: max. 50kg load Loading of baskets under water Containers of route 2, baskets Size: 990mm x 990mm x 990mm Weight: max kg Loading of baskets under water Handling according to route 3 Max. size: 2.500mm x 1.000m x 1.000mm Intermediate storage in pool 3 (in basket if applicable) Lifting, rinsing and packing in plastics SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 14

15 On-site performance method of approach for generation of waste plans Stage 1 generation of Dose Rate Mapping Stage 2 preparation of Draft Waste Plan Stage 3 calculation of specific activity of involved nuclides (e.g. Co-60, etc.) and total specific activity inventory in concerned waste package Example Dose Rate Mapping for R2 Stage 4 if below maximum allowable values -> Preliminary Waste Plan Stage 5 confirmation (or adaptation) during site performance -> Final Waste Plan Stage 6 released Final Waste Plan is part of Final Documentation Example Preliminary Waste Plan for dismantling and packing of R2 restraint structure SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 15

16 Content 1. Project Introduction 2. Scope of Supply Special Equipment Special Tools On-site Performance 3. Time Schedule Project Milestones SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 16

17 Chapter 3 Time Schedule Planning & Preparation Site work & final documentation SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 17

18 Summary The dismantling of a research reactor has no specific approach Standard equipment is used The whole project from planning to final documentation - will be finished in slightly more than one year SVAFO R2 Decommissioning, Phase 1 S. Krüger AREVA GmbH Proprietary - RESTRICTED AREVA - AREVA - AL: N - ECCN: N - p. 18

19 End of Presentation SVAFO R2 Decommissioning Phase 1 January 28th and 29th, 2015 Stephan Krüger AREVA Karlstein / Main (Germany) January 28th, 2015