Corrosion Science and Technology

  • 제18권5호
  • /
  • Pages.190-195
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  • 2019
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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Ni Plating Technology for PWR Reactor Vessel Cladding Repair

  • 투고 : 2019.10.25
  • 심사 : 2019.10.30
  • 발행 : 2019.10.31
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초록

SA508 low-alloy steel for a reactor vessel was exposed to primary water in a pressurized water reactor (PWR) plant because the cladding layer of type 309 stainless steel for the RPV was removed, due to an accident in which the detachment of the thermal sleeve occurred. The major advantage of the electrochemical deposition (ECD) Ni plating technique is that the reactor pressure vessel can be repaired without significant thermal effects, and Ni has solid corrosion resistance that can withstand boric acid. The corrosion rate assessment of the damaged part was performed, and its trend was analyzed. Essential variables of the Ni plating for repair of the damaged part were derived. These conditions are applicable variables for the repair plating device, and have been carefully adjusted using the repair plating device. The process for establishing ASME technical standards called Code Case N-840 is described. The process of developing Ni-plating devices, and the electroplating procedure specification (EPS) are described.

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참고문헌

  1. KAERI report, CR-213, Process Technology Development of Ni Electroplating in Steam Generator Tube (2005).
  2. M. J. Kim, D. J. Kim, J. S.Kim, H. P. Kim, and S. S Hwang, Proc. ASME PVP 2013 Conf., PVP2013-97857, Paris, France (2013).
  3. ASME BPVC-XI-N-569-1, Alternative Rules for Repair by Electrochemical Deposition of Classes 1 and 2 Steam Generator Tubing Section XI, Division 1 (1999).
  4. ASME BPVC-XI-1-N-840, Cladding Repair by Underwater Electrochemical Deposition in Class 1 and 2 Applications Section XI, Division 1 (1995).
  5. M. S. Kim, S. S, Hwang, D. J. Kim, and D. B. Lee, Corros. Sci. Tech., 18, 148, (2019).
  6. ASME BPVC-IX-2017, Qualification Standard For Welding, Brazing, And Fusing Procedures, Welders; Brazers; And Welding, Brazing, And Fusing Operators (2017).