Technology
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2026-07-29 22:08
Specialized Technology
Reactor Coolant Pump Maintenance
KEPCO KPS is responsible for maintenance services for Reactor Coolant Pumps, RCPs, which are critical equipment in nuclear power plants. Based on specialized technologies, experience, and technology development, the company performs chemical decontamination of pumps, replacement and precision disassembly inspection of pumps and motors, and maintenance of shaft seal assemblies. In addition, KEPCO KPS performs operational diagnosis and troubleshooting of Reactor Coolant Pumps to support the safe operation of nuclear power plants.
Major Services
Field Services
- Replacement of RCP internals
- Chemical decontamination of RCP internals
- Precision disassembly inspection of RCP internals
- Replacement of RCP motors
- Precision disassembly inspection of RCP motors
- Replacement of RCP motor stators
- RCP seal operation monitoring and engineering
- RCP vibration analysis
- Various troubleshooting services
Technology Development and Self-Reliance
- Development of chemical decontamination equipment and processes for RCP internals
- Development of main flange bolt hole cleaning equipment
- Development of main flange gasket seat cleaning equipment
- Development of seized bolt removal equipment
- Development of RCP seal refurbishment methods
- Development of RCP seal leakage testing methods
- Development of RCP casing resurfacing machines
Participation in Overseas Nuclear Maintenance Projects
- Disassembly inspection of RCP TBA for BNPP Units 1 to 4
- RCP seal refurbishment and TBA disassembly inspection for ANGRA Unit 2
Engineering consulting
- Engineering consulting
Participation in Overseas Nuclear Maintenance Projects
- Disassembly inspection of RCP TBA for BNPP Units 1 to 4
- RCP seal refurbishment and TBA disassembly inspection for ANGRA Unit 2
Equipment
01
RCP Alignment Tool 93A-1, 2 sets
02
RCP Coupling & Spool Mock-up 93A-1, 1 set
03
RCP Internals Chemical Decontamination Equipment, 1 set each for 93AS, 93A1, 100, and Korean standard type
04
Hydraulic Wrench DK 60.0, DR 2.20 and DR 8.30, 1 set for I.T.H M/F and TV bolts
05
Master Tool Set, 272 pieces, 1 set
06
Lapping Machine Type 36, 1 unit
07
Surface Plates, 4 units
08
Optical Flat, 3 sets
09
Vibration Analyzer DAI 408, 1 set
10
Non-Contact 3D Measuring Machine OMS 400, 1 set
11
Hydraulic Ram & Hand Pump SCR-252H and SCH 603H, 1 set each
12
Hoist Ring, 2 × 8 threads, 1 set
Major Project
Domestic
[Pump Internals]
- Kori Unit 1: Main Flange Gasket Replacement, 1991
- Kori Units 3 and 4, Yeonggwang Units 1 and 2: TVCS and DACS Replacement, 1995 1996
- Kori Unit 2: TV Bolt and DACS Replacement, 1998
- Seal replacement and installation at various nuclear power plants
- Disassembly and inspection of 93A-1 type RCP Seal Housing
- Inspection and replacement of Seal Injection Filter Housing
- Seal Refurbishment
[RCP MOTOR]
- 10 year precision motor inspection, WEC / SIEMENS / FRAMATOME / GE
- Motor Resistance Ring Replacement, Kori Unit 1
- Replacement work related to loose motor flywheel key, Kori Unit 3
- Motor stator replacement, WEC / SIEMENS / FRAMATOME / GE
- [Others]
- Inspection and analysis of Seal Leak-off Data
- Trouble Shooting
- Vibration inspection and analysis
- Casing deformation inspection and machining
Overseas
- Seabrook Unit 1 : Seal, TVCS, and Motor, 1994
- Diablo Canyon Unit 1: Motor, 1994
- Surry Unit 1: Seal and Motor, 1994
- Farley Units 1 and 2: Seal and Motor, 1995
- North Anna Unit 1: Seal and Motor, 1995
- Millstone Unit 3: Chemical decontamination of pump internals, 1995
- Paloverdy Unit 1 : Motor, 1995
- Indian Point Unit 3 : Seal, Motor, 1997
- Ling Ao Unit 1, China : Pump, 2007
- Daya Bay Units 1 and 2, China: Seal precision disassembly inspection and performance testing, 2007
- UAE BNPP Units 1 and 3 : TBA, 2022 and 2024
- Angra Unit 2, Brazil : Seal refurbishment and TBA, 2025
Technologies and Intellectual Property Rights
- Development of chemical decontamination processes and equipment for RCP internals
- Development of RCP Alignment Tool
- Development of RCP Chain Hoist Rotating Tool
- Development of RCP TVCS replacement tool
- Development of cartridge seal handling tool
- Development and manufacturing of equipment and tools for Korean standard RCP seal maintenance
- Development of tools for resolving seizure of RCP No. 1 Seal
- Development of equipment for removing seized RCP M/F bolts
- Development of specialized tools for Korean standard RCP motor maintenance
- Development of casing precision inspection equipment
- Foreign substance removal device: Patent
- Device for inspecting the inside of Reactor Coolant Pumps: Patent
- Thrust block run-out measuring equipment: Patent
- RCP TBA emergency oil supply device and installation method: Patent
- Electric carrier for transporting RCP motors: Patent
- Lubrication system for Reactor Coolant Pumps: Patent
- Motor base bolt removal device: Patent
- Lug assembly for heavy-load lifting work: Patent
- Chemical decontamination method for Korean standard Reactor Coolant Pumps: Patent
- Alignment device for rotor assembly of Reactor Coolant Pump motors: Patent
- Concentricity and flatness measuring device: Patent
- Shaft end play measuring device for Reactor Coolant Pump motors: Patent
- 3D position measuring device for Reactor Coolant Pumps: Patent
- Seized bolt removal device for Reactor Coolant Pump casings: Patent
- Base bolt disassembly and assembly tool for Reactor Coolant Pump thrust bearings: Patent
- Dilution-type chemical decontamination method for radioactively contaminated Reactor Coolant Pump internals: Patent
- Cleaning device for main flange gasket seats: Patent
- Cleaning device for main flange bolt holes: Patent
- Chemical decontamination device for equipment contaminated with radioactive materials: Patent