The WAK Decommissioning and Dismantling Project

Transcription

1 A company of the EWN-group The WAK Decommissioning and Dismantling Project German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities Osaka, Japan - April 21 st, 2015 Dr. Marco Klipfel Project Manager Glass Chemistry Christian Held Project Manager Decommissioning Research Facilities

2 Presentation scope The EWN-Group and WAK GmbH - decommissioning activities in Germany General overview of the WAK D&D activities Status of the decommissioning of the Reprocessing Building Status and outlook on the decommissioning of the HLLW facilities Challenges on the decommissioning of the Vitrification Facility Summary German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 2

3 The EWN-Group and Subsidiaries Nuclear Sites Netherlands EWN / ZLN GmbH Greifswald EWN GmbH Rheinsberg Main task of EWN-Group Decommissioning and waste management of nuclear facilities belonging to the public Belgium AVR GmbH Luxemb. WAK GmbH France Switzerland Austria German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 3

4 Site of WAK VEK Vitrification Plant LAVA Storage Building for High Level Liquid Waste (HLLW) HWL Old HLLW-Storage Building HLLW-Facilities incl. VEK 60 m³ HLLW, 7.7E17 Bq, 500 kg uranium, 16.5 kg plutonium (vitrified) 56 Mg Glass product, 140 canisters 5 CASTOR-casks at the Interim Storage North at Greifswald/Germany Operation Reprocessing Building 3500 Mg process equipment and parts of the infrastructure dismantled, out of it 100 Mg remotely controlled 1200 Mg concrete disposed as debris 99% of radioactive inventory (5E14 Bq) removed German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 4

5 D&D Status of Decommissioning of WAK Reprocessing Building Remote handling equipment in crane hall 2 Arm EMS-Manipulator Crane as manipulator carrier system 3500 of 5000 Mg of process, ventilation, machine technology and cables dismantled 1200 of 1600 Mg saw blocks asbestos-containing, feedthroughs removed of m² surfaces decontaminated (PCB) Hot cell after decontamination Crane hall reprocessing building German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 5

6 Decommissioning of the HLLW-facilities Preliminary step 1: Construction of the HWL-Annex South HWL-Annex South and its technical equipment in operation since May 2008 LAVA cells HWL LAVA storage tanks Annex South HLLW storage tanks MLLW storage tanks Control room Drum lock German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 6

7 Decommissioning of the HLLW-facilities Preliminary step 2: Remote controlled dismantling of the MLLW-tanks Using a dredger as manipulator carrier system Max. dose rate approx. 70mSv/h at tank Max. dose rate approx. 10 msv/h at wall breakthroughs and working area 19 Mg steel were decommissioned Tank wall thickness of 8 mm Tools used for dismantling: angle grinder cutter German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 7

8 Decommissioning of the HLLW-facilities Preliminary step 3: New installation and access to the HLLW storage tanks Assembling shielding doors Installation of additional ventilation Breakthrough to HLLW storage German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 8

9 Decommissioning of the HLLW-facilities Preliminary step 3: New installation and access to the HLLW storage tanks Pull out the concrete block Dismantling of HLLW tank German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 9

10 Decommissioning of the HLLW-facilities Dismantling machinery Data of new HLLW-tanks Volume 80 m³ Weight 18 Mg Remaining activity, each1.5 E15 Bq (α, β) Data of old HLLW-tanks Volume 75 m³ Weight 16 Mg Remaining activity, one tank 2.6 E15 Bq (α, β) German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 10

11 Remote Controlled Dismantling of three LAVA cells Preliminary steps: Dismantling of the High-Active Laboratory Assembling of a locking door for simplified waste locking transportation Assembling of new installations in the crane hall 2015: Commissioning of the new installations Vertical remote controlled dismantling with Telbot TB 1000 manipulator system (HWM) Initial status New installations German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 11

12 Challenges on D & D of the VEK German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 12

13 Challenges on D & D of the VEK 20 m Melter cell German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 13

14 WAK Decommissioning Project, Summary Decommissioning and dismantling of the reprocessing building technically solved Dismantling of the HLLW-storage facilities Preliminary steps completed: Annex South, MLLW, Ventilation,.. Access to 1 st storage tank ongoing Wide experience gained during the remote controlled dismantling of the reprocessing building and the MLLW-facilities knowledge for other D&D projects extensive pool of remote controlled dismantling tools developed Dismantling of vitrification plant concept developed, licensing and detail planning ongoing challenging tasks for the coming years German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 14

15 Thank you for your kind attention German-Japanese Symposium on Technological and Educational Resources for the Decommissioning of Nuclear Facilities April 21, 2015 M. Klipfel, WAK 15