A study on the radiation damage and recovery of neutron irradiated vessel steel using magnetic Barkhausen noise J. Appl. Phys. 85, 5726 (1999); 10.1063/1.370265Changes in magnetic parameters of neutron irradiated SA 508 Cl. 3 reactor pressure vessel forging and weld surveillance specimensThe B-H hysteresis loop and Barkhausen noise have been measured in the neutron irradiated SA508 steel of 45 m thickness. The coercive force of B-H loop showed a slow change up to a neutron dose of 10 14 n/cm 2 and increased by 15.4% for a 10 16 n/cm 2 dose sample compared with that of the unirradiated one, related to the domain wall motion hindered by the increased defects. However, the amplitude of Barkhausen noise reflecting the wall motion decreased slowly up to 10 14 n/cm 2 irradiation, followed by a rapid decrease of 37.5% at 10 16 n/cm 2 .
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