Irradiation effects on magnetic properties in neutron and proton irradiated reactor pressure vessel steel

Author

Park, Duck-Gun ; Hong, Jun-Hwa ; In-Sup Kim ; Kim, In-Sup

Author_Institution

Korea Atomic Energy Res. Inst., Taejon, South Korea

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3898

Lastpage

3900

Abstract

The effects of neutron and proton dose on the magnetic properties of a reactor pressure vessel (RPV) steel were investigated. The coercivity and maximum induction increased in two stages with respect to neutron dose, being nearly constant up to a dose of 1.5×10^-7 dpa, followed by a rapid increase up to a dose of 1.5×10 ^-5 dpa. The coercivity and maximum induction in the proton irradiated specimens also showed a two stage variation with respect to proton dose, namely a rapid increase up to a dose of 0.2×10^-2 dpa, then a decrease up to 1.2×10^-2 dpa. The Barkhausen noise (BN) amplitude in neutron irradiated specimens also varied in two stages in a reverse manner, the transition at the same dose of 1.5×10^-7 dpa. The BN amplitude in proton irradiated specimens decreased by 60% up to 0.2×10^-2 dpa followed by an increase up to 1.2×10^-2 dpa. The results were in good accord with the one dimensional domain wall model considering the density of defects and wall energy

Keywords

Barkhausen effect; coercive force; fission reactor materials; magnetic domain walls; neutron effects; proton effects; steel; Barkhausen noise; coercivity; defect density; induction; neutron dose; one dimensional domain wall model; proton dose; reactor pressure vessel steel; wall energy; Coercive force; Inductors; Magnetic domain walls; Magnetic hysteresis; Magnetic noise; Magnetic properties; Neutrons; Protons; Saturation magnetization; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800701

Filename

800701