Development Status of Dismantling Technology for Old Steam Generator & RV in Kori unit 1

Transcription

1 Development Status of Dismantling Technology for Old Steam Generator & RV in Kori unit Doosan Heavy Industries & Co. Ltd Research Institute Kwang Soo Park

2 1 Doosan Experience 2 Development of Dismantling Tech. for Old Steam Generator 3 Development of Dismantling Tech. for RV in Kori unit 1 4 Summary

3 1-1 SGR Process 2

4 1-1 Foundation technology would be established from technology development & performing the steam generator replacement for Han Wool unit 3 / 4. Performed pipe cutting using developed cutting technology Performed pipe decon. from the cooperated Nuvision To learned fields-applied technology of cutting & decontamination for pipe 3

5 1-2 Decommissioning PJT : TRIGA MARK II & III Research Reactor Decommissioning PJT Period : Performed dismantling the research reactor, peripheral facility and concrete and so on Items Research Reactor Unit 1 Research Reactor Unit 2 Type TRIGA Mark-II TRIGA Mark-III Operating Start Shut Down Power output 250 KW 2 MW Operating Time 36,000 hr 55,000 hr 4

6 1-2 We had experience of research reactor dismantling for Triga Mark II / III. From this experience, we had work capability of dismantling field. To obtain various work know-how from dismantling PJT To establish dismantling data-base To have PJT management technology like schedule, process control etc. 5

7 1 Doosan Experience 2 Development of Dismantling Tech. for Old Steam Generator 3 Development of Dismantling Tech. for RV in Kori unit 1 4 Summary

8 2-1 PJT Name Development of dismantling technology for old steam generator Period ~ (Total 36 month) Target Development of Dismantling System for large radioactivity metal waste Main Contents Participating Institute To design dismantling process To develop cutting & segmentation technology - Shell, Tube Sheet, Internal Structure and so on To develop decontamination technology - U-tube decontamination To design radiation safety management Doosan Heavy Industries Co. Ltd (Managing Department) EnesG Co. Ltd Hana Nuclear Power Engineering Co. Ltd HNEnertech KHNP (Consultation) 7

9 2-2 In order to perform the cutting test, we design & fabricate the various mockup. We performed the performance test of developed equipment using the these mockup. Mockup design & fabrication [ Shell Mockup ] [ Channel head Mockup ] [ Shroud Mockup ] 8

10 2-3 Face Cutter Inner Circular Saw Oxygen Cutting Circular Saw Wire Saw Circular Saw Circular Saw Bans Saw Diamond Wire Saw Inner Cutter (Wheel) Face Cutter Thermal Cutting Others Segmentation : Band Saw + Circular Saw To obtain mechanical & thermal cutting technology 9

11 2-3 Circular saw cutting Technology Characteristics Size : 6100(OD) x 1300W mm Cutting Capability : max. 170 mm Cutting Process : Endless Rotation Easy Installation/Disassemble [ Cutting Head ] [ Chip ] [ View after cutting ] 10

12 2-3 Diamond wire saw cutting Technology Characteristics [ Diamond Wire Saw ] Size - 6,650L x 2,520W x 6,450H mm Cutting Capability : max. 3,250 mm Easy Installation/Disassemble [ View after cutting ] [ Cutting ] 11

13 2-3 Band saw cutting Technology [ Band Saw Equipment ] Characteristics Size : - 9,000L x 8,500W x 8,500H mm Cutting Capability : max. 3,200 mm Vertical / Horizontal cutting Easy Work using the Turn Table [ View after cutting ( 두께 600 mm) ] 12

14 2-4 Blasting Decontamination Technology Characteristics [ Layout of Equipment ] Medium circulation type Blasting Media : Grit Blasting Media Type: Al Oxide or SiC Multi-operated work function [ Simulation ] 13

15 2-4 Milling & Plasma Decon. Technology Characteristics [ Milling Equipment] Channel head inner wall decon. Milling Decontamination for crack area U-Tube Free-release Plasma Decontamination To apply after blasting decon. [ Plasma Decontamination Equipment] 14

16 2-5 In order to dismantle old steam generator, we design work process, radiation safety management and waste management and so on. P rocess Waste Waste Management Waste Treatment Thermal cutting of upper shell Slag Prevent scattering Measure Drumming 15

17 2-6 To obtain key dismantling technology for large component such as steam generator To design work process for dismantling steam generator From this technical development for dismantling of OSG, we obtain performance capability & dismantling technology of primary component such as RCP, PZR and so on. [ Application part using the developed technology ] 16

18 1 Doosan Experience 2 Development of Dismantling Tech. for Old Steam Generator 3 4 Development of Dismantling Tech. for RV in Kori unit 1 Summary

19 3-1 In order to dismantle the reactor of Kori unit 1, some items is considered such as safe, economical dismantling, cavity characteristics, infra and so on. STADE NPP : 672MWe, PWR (Germany) RV - On Air - Utilize the cavity - Thermal+Mechanical - Siempelkamp RVI - Underwater - Utilize the cavity - Mechanical - AREVA Implication CHOOZ A : 1,530MWe, PWR (France) RV RVI - Underwater - Underwater - Utilize the cavity - Utilize the cavity - Mechanical - Mechanical - WEC - WEC ZION A : 1,040MWe, PWR (USA) RV - On Air - Utilize the cavity - Thermal+Mechanical - Siempelkamp RVI - Underwater - Utilize the cavity - Mechanical - Siempelkamp 18

20 3-2 RV & RVI dismantling work consists of USG, CSB, CS, LSS and RV cutting. After dismantling RVI, RV dismantling will be performed in RV inside area. Layout UGS 1 RV/RVI UGS lifting Band saw installation UGS cutting CSB 2 [ RV/RVI ASS Y ] [ RV Dismantling ] Upper CSB cutting Upper CSB lifting Lower CSB lifting UGS CSB CS CS 3 / LSS 4 LSS Lower CSB cutting CS/LSS dividing CS/LSS cutting 1. Upper Guide Structure 2. Core Support Barrel 3. Core Shroud 4. Lower Support Structure RV RV Shell cutting Band Saw installation RV Shell cutting 19

21 3-2 Workshop with Siempelkamp RV/RVI Dismantling scenario for Kori unit 1 From the workshop with siempelkamp, We get many information & materials. in order to RV/RVI dismantling for Kori unit 1, we study & review using the RV/RVI dismantling case. We study cavity of Kori unit 1. We design dismantling scenario of RV for Kori unit 1. 20

22 3-3 We designed cutting plan for RV dismantling. Cutting method is thermal cutting. Container for storage is 200 liter drum. We will plan to optimize cutting plan using the RV characterization result & decided container. Items Cutting Length Number of cut-off piece Number of Drum Expected Value 603 m 708 ea 310 ea 21

23 1 Doosan Experience 2 Development of Dismantling Tech. for Old Steam Generator 3 4 Development of Dismantling Tech. for RV in Kori unit 1 Summary

24 Doosan is being made to obtain key technology of dismantling to serve total solution of nuclear power plant. To understand primary component To develop dismantling technology for large primary component - Dismantling Eng g for OSG To have PJT management technology & fields-applied technology - Replacement of SG & RVH - Research Reactor Dismantling Eng g Capability of Doosan Process & Service Tech. PJT Management RV Dismantling Tech. To have service technology using remote maintenance equipment To have many cutting technology such as mechanical & thermal cutting To plan technical development of RV dismantling for Kori unit 1 using the government fund To design RV dismantling scenario for Kori unit 1 23

25 Thank You