Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지
DOI QR코드

DOI QR Code

He Generation Evaluation on Electrodeposited Ni After Neutron Exposure

중성자 조사에 따른 Ni도금피복재에서의 He발생량평가

  • Hwang, Seong Sik (Korea Atomic Energy research Institute, Materials Safety Technology Development Division) ;
  • Kwon, Junhyun (Korea Atomic Energy research Institute, Materials Safety Technology Development Division) ;
  • Kim, Dong Jin (Korea Atomic Energy research Institute, Materials Safety Technology Development Division) ;
  • Kim, Sung Woo (Korea Atomic Energy research Institute, Materials Safety Technology Development Division)
  • 황성식 (한국원자력연구원, 재료안전기술개발부) ;
  • 권준현 (한국원자력연구원, 재료안전기술개발부) ;
  • 김동진 (한국원자력연구원, 재료안전기술개발부) ;
  • 김성우 (한국원자력연구원, 재료안전기술개발부)
  • Received : 2021.07.08
  • Accepted : 2021.10.08
  • Published : 2021.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Neutron dose level at bottom head of a reactor pressure vessel (RPV) was calculated using reactor vessel neutron transport for a Korean nuclear power plant A. At 34 EFPY with a 40-year (2042) design life after plating repair, irradiation fast neutron effect was 6.6x1015 n/cm2. As helium(He) gas can be generated by Ni only at 1/106 level of 5 × 1021 n/cm2, He generation possibility in the Ni plating layer is very little during 40 years of operation (2042, 34 EFPY). Thermal neutrons can significantly affect the generation of He from Ni metal. At 10 years after a repair, He can be generated at a level of about 0.06 appm, a level that can add general welding repair without any consideration. After 40 years of repair, 9.8 appm of He may be generated. Although this is a rather high value, it is within the range of 0.1 to 10 appm when welding repair can be applied. Clad repair by Ni electroplating technology is expected to greatly improve the operation efficiency by improving the safety and shortening the maintenance period of the nuclear power plant.

Keywords

Acknowledgement

이 논문은 2021년도 과학기술정보통신부의 재원으로 한국연구재단의 지원(2021M2E4A1037979, 고리 1호기 1차계통 압력경계 재료 실증체계 구축)으로 수행되었습니다.

References

  1. Min Su Kim, Seong Sik Hwang, Dong Jin Kim, and Dong Bok Lee, Variables of Electrolytic Nickel Plating for RPV Cladding Repair, Corrosion Science and Technology, 18, 148 (2019). Doi: https://doi.org/10.14773/cst.2019.18.4.148
  2. Wayne Lunceford, Nathan Palm, Eric Willis, Jonathan Tatman and Steven McCracken, Proceedings of the ASME 2016 Pressure Vessels and Piping Conference PVP 2016 July 17-21, Vancouver, Canada, (2016)
  3. R. K. Disney, LTR-REA-00-637, Release of SYNTHE 1.0, August 8 (2000)
  4. M. Griffiths, G.A. Bickel, S.A. Donohue, P. Feenstra, C.D. Judge, D. Poff, L. Walters, M.D. Wright L. Greenwood and F.A. Garner, Proceedings of 16th Environmental Degradation on Materials in Nuclear Power Systems-Water reactors, 'Degradation of Ni-alloy Components in CANDU Reactor Cores' Aug. 11 ~ 15, Asheville, NC, USA (2013).