Development Status of

Dismantling Technology

for Old Steam Generator &

RV in Kori unit 1

2016. 8.

Doosan Heavy Industries & Co. Ltd

Research Institute

Kwang Soo Park

Doosan Experience

Development of Dismantling Tech. for RV in Kori unit 1

Development of Dismantling Tech. for Old Steam Generator

1

2

3

Summary 4

1-1

SGR Process

2

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

1-1

Decommissioning PJT : TRIGA MARK II & III Research Reactor Decommissioning

PJT Period : 1997 2014

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 1962 1972

Shut Down 1995. 1. 31 1995. 12. 31

Power output 250 KW 2 MW

Operating Time 36,000 hr 55,000 hr

1-2

4

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.

1-2

5

Doosan Experience

Development of Dismantling Tech. for RV in Kori unit 1

Development of Dismantling Tech. for Old Steam Generator

1

2

3

Summary 4

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PJT Name

Period

Target

Main

Contents

Development of dismantling technology for old steam generator

2-1

2013. 09. ~ 2016. 08 (Total 36 month)

Development of Dismantling System for large radioactivity metal waste

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

Participating

Institute Doosan Heavy Industries Co. Ltd (Managing Department)

EnesG Co. Ltd

Hana Nuclear Power Engineering Co. Ltd

HNEnertech

KHNP (Consultation)

Mockup design & fabrication

[ Shell Mockup ] [ Channel head Mockup ] [ Shroud Mockup ]

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.

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2-2

Segmentation : Band Saw + Circular Saw

Oxygen Cutting

Circular Saw

Wire Saw

Circular Saw

Inner Circular Saw Face Cutter

• Circular Saw

• Bans Saw

• Diamond Wire Saw

• Inner Cutter (Wheel)

• Face Cutter

• Thermal Cutting

• Others

To obtain mechanical &

thermal cutting

technology

9

2-3

Circular saw cutting Technology

[ Chip ] [ Cutting Head ] [ View after cutting ]

•Size : 6100(OD) x 1300W mm

•Cutting Capability : max. 170 mm

•Cutting Process :

Endless Rotation

• Easy Installation/Disassemble

Characteristics

10

2-3

Diamond wire saw cutting Technology

[ Diamond Wire Saw ]

[ Cutting ]

•Size

- 6,650L x 2,520W x 6,450H mm

•Cutting Capability :

max. 3,250 mm

• Easy Installation/Disassemble

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Characteristics

2-3

[ View after cutting ]

Band saw cutting Technology

[ Band Saw Equipment ]

• 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

Characteristics

2-3

Blasting Decontamination Technology

[ Layout of Equipment ]

[ Simulation ]

•Medium circulation type

• Blasting Media : Grit

• Blasting Media Type:

Al Oxide or SiC

•Multi-operated work function

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Characteristics

2-4

[ Milling Equipment]

• Channel head inner wall decon.

Milling Decontamination for

crack area

•U-Tube Free-release

Plasma Decontamination

To apply after blasting decon.

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Characteristics

2-4

Milling & Plasma Decon. Technology

[ Plasma Decontamination Equipment]

In order to dismantle old steam generator, we design work process, radiation safety

management and waste management and so on.

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2-5

Process Waste Waste Management Waste Treatment

Thermal cutting of upper shell

• Slag • Prevent scattering • Measure • Drumming

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. ”

16

[ Application part using the developed technology ]

2-6

Doosan Experience

Development of Dismantling Tech. for RV in Kori unit 1

Development of Dismantling Tech. for Old Steam Generator

1

2

3

Summary 4

STADE NPP : 672MWe, PWR (Germany)

CHOOZ “A” : 1,530MWe, PWR (France)

ZION “A” : 1,040MWe, PWR (USA)

RVI

- Underwater - Utilize the cavity

- Mechanical - AREVA

RV - On Air - Utilize the cavity - Thermal+Mechanical - Siempelkamp

RVI

- Underwater - Utilize the cavity

- Mechanical - WEC

RV

- Underwater - Utilize the cavity

- Mechanical - WEC

RVI

- Underwater - Utilize the cavity

- Mechanical - Siempelkamp

RV

- On Air - Utilize the cavity

- Thermal+Mechanical

- Siempelkamp

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.

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3-1

Implication

UGS

CSB

LSS

CS

[ RV/RVI ASS’Y ] [ RV Dismantling ]

RV/RVI

Layout

UGS1

UGS lifting Band saw

installation

UGS cutting

CSB2

Upper CSB cutting Upper CSB lifting Lower CSB lifting

CS3/LSS4

Lower CSB cutting CS/LSS dividing CS/LSS cutting

RV

RV Shell cutting Band Saw

installation

RV Shell cutting

1. Upper Guide Structure 2. Core Support Barrel 3. Core Shroud 4. Lower Support Structure

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.

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3-2

Workshop with Siempelkamp

• 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.

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3-2

RV/RVI Dismantling scenario for Kori unit 1

3-3

Items Expected Value

Cutting Length 603 m

Number of cut-off piece 708 ea

Number of Drum 310 ea

• 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.

21

Doosan Experience

Development of Dismantling Tech. for RV in Kori unit 1

Development of Dismantling Tech. for Old Steam Generator

1

2

3

Summary 4

• To have PJT management technology &

fields-applied technology - Replacement of SG & RVH - Research Reactor Dismantling

•To understand primary component

•To develop dismantling technology for

large primary component

- Dismantling Eng’g for OSG

Eng’g

PJT

Management

Process & Service

Tech. RV Dismantling

Tech.

• To have service technology using remote

maintenance equipment

• To have many cutting technology

such as mechanical & thermal cutting

Capability

of Doosan

Doosan is being made to obtain key technology of dismantling to serve total

solution of nuclear power plant.

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• To plan technical development of RV

dismantling for Kori unit 1 using the

government fund

• To design RV dismantling scenario for Kori

unit 1

Thank You

Kwangsoo.park@doosan.com