Ni Plating Technology for PWR Reactor Vessel Cladding Repair
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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 anaccident in which the detachment of the thermal sleeve occurred. The major advantage of the electrochemicaldeposition (ECD) Ni plating technique is that the reactor pressure vessel can be repaired without significantthermal effects, and Ni has solid corrosion resistance that can withstand boric acid. The corrosion rateassessment of the damaged part was performed, and its trend was analyzed. Essential variables of the Niplating for repair of the damaged part were derived. These conditions are applicable variables for the repairplating device, and have been carefully adjusted using the repair plating device. The process for establishingASME technical standards called Code Case N-840 is described. The process of developing Ni-plating devices,and the electroplating procedure specification (EPS) are described.
Abstract
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 anaccident in which the detachment of the thermal sleeve occurred. The major advantage of the electrochemicaldeposition (ECD) Ni plating technique is that the reactor pressure vessel can be repaired without significantthermal effects, and Ni has solid corrosion resistance that can withstand boric acid. The corrosion rateassessment of the damaged part was performed, and its trend was analyzed. Essential variables of the Niplating for repair of the damaged part were derived. These conditions are applicable variables for the repairplating device, and have been carefully adjusted using the repair plating device. The process for establishingASME technical standards called Code Case N-840 is described. The process of developing Ni-plating devices,and the electroplating procedure specification (EPS) are described.
참고문헌 (6)
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