Ni과 Cr 함량이 다른 원자로 압력용기용 강의 중성자 조사 후 내식성 평가
Corrosion Behaviors of Neutron-Irradiated Reactor Pressure Vessel Steels with Various Nickel and Chromium Contents
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초록
Quasi-nano-hardness and corrosion behaviors of neutron-irradiated reactor pressure vessel (RPV) steels such as 15Ch2MFA (Ni<0.4, 2.5<Cr<3.0) and 15Cr2NHFA (Ni<1.0, 0.8<Cr<2.3) were determined to develop a high strength and high corrosion resistance RPV steels and to establish an unique experimental method to reduce nuclear waste. Neutron irradiation test was carried out in an experimental reactor at 320℃ with maximum fluency of 4.8x1020 n/cm2 (En>1.0 MeV) for 32 days. Quasi-nano-hardnesses of the 15Ch2MFA and 15Cr2NHFA steels were 183.8 and 179.8 Hv, respectively. Their corrosion rates and corrosion potentials were 2.4×10-4Acm-2, -515.9 mVSHE and 6.8×10-4 Acm-2, -523.6 mVSHE in NACE standard TM0284-96 solution at room temperature, respectively. 15Ch2MFA steel showed better quasi-nano-hardness and corrosion resistance than 15Cr2NHFA steel in this test condition.
Abstract
Quasi-nano-hardness and corrosion behaviors of neutron-irradiated reactor pressure vessel (RPV) steels such as 15Ch2MFA (Ni<0.4, 2.5<Cr<3.0) and 15Cr2NHFA (Ni<1.0, 0.8<Cr<2.3) were determined to develop a high strength and high corrosion resistance RPV steels and to establish an unique experimental method to reduce nuclear waste. Neutron irradiation test was carried out in an experimental reactor at 320℃ with maximum fluency of 4.8x1020 n/cm2 (En>1.0 MeV) for 32 days. Quasi-nano-hardnesses of the 15Ch2MFA and 15Cr2NHFA steels were 183.8 and 179.8 Hv, respectively. Their corrosion rates and corrosion potentials were 2.4×10-4Acm-2, -515.9 mVSHE and 6.8×10-4 Acm-2, -523.6 mVSHE in NACE standard TM0284-96 solution at room temperature, respectively. 15Ch2MFA steel showed better quasi-nano-hardness and corrosion resistance than 15Cr2NHFA steel in this test condition.
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