Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Manufacturing and Performance Test of Obsolete Valve in NPP using DED Metal 3D Printing Technology

원전 단종 밸브의 DED 방식 금속 3D프린팅 제작 및 성능시험

  • 장경남 (한국수력원자력(주) 중앙연구원)
  • Received : 2021.10.08
  • Accepted : 2021.12.16
  • Published : 2021.12.31
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Abstract

The 3D printing technology is one of the fourth industrial revolution technology that drives innovation in the manufacturing process, and should be applied to nuclear industry for various purposes according to the manufacturing trend change. In nuclear industry, it can be applied to manufacture obsolete items and new designed parts in advanced reactors or small modular reactors (SMRs), replacing the traditional manufacturing technologies. A gate valve body was manufactured, which was obsolete in nuclear power plant, using DED(Directed Energy Deposition) metal 3D printing technology after restoring design characteristics including 3D design drawing by reverse engineering. The 3D printed valve body was assembled with commercial parts such as seat-ring, disk, stem, and actuator for performance test. For the valve assembly, including 3D printed valve body, several tests were performed, including pressure test, end-loading test, and seismic test according to KEPIC MGG and KEPIC MFC. In the pressure test, hydraulic pressure of 391kgf/cm2 was applied to 3D printed valve body, and no leak was detected. Also the 3D printed valve assembly was performed well in end-loading and seismic tests.

Keywords

Acknowledgement

이 연구는 산업통상자원부 산업기술혁신사업의 "발전수요부품 국산화를 위한 3D프린팅 상용화 기술 개발" 과제의 일환으로 수행된 연구입니다.

References

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