원자력 발전소 배관재를 이용한 고온 수화학 조건에서의 방사화 부식생성물 모사에 관한 연구

Study on the Simulation of Crud Formation using Piping Materials of Nuclear Power Plant in High Temperature Water

Sang-Hyun Kim, In-Sup Kim, Kun-Jai Lee

Abstract

High temperature - high pressure apparatus was developed to simulate nickel fewite corrosion products which were main compositions of the radioactive crud in the nuclear power plant. Corrosion product similar to the crud was obtained by a tube accumulator system. Nickel alloy (Inconel 690) and carbon steel (SA106 Gr. C) were corroded at 270 in the corrosion product generator. Ni ions and Fe ions dissolved by corrosion reaction were able to be transported to the accumulator because the crud generation mechanism was the solubility change with temperature. To evaluate the properties of simulated corrosion products, scanning electron microscope (SEM) observation and EDAX analysis were performed. SEM observation of corrosion product showed the needlelike or crystal structure of oxide depending on precipitating location. The crystal oxide was the nickel ferrite, which was similar to the crud in nuclear power plants.

Key Words : radioactive crud, crudsimulation, corrosion product, nickel ferrite, high temperaturecorrosion, 방사화 부식생성물, 방사화 부식생성물 모사, 부식생성물, 니켈 페라이트, 고온 부식

Reference

JNFCWT

Online Submission

Korean Radioactive
Waste Society (KRS)

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