Evaluation of irradiated pressure vessel steel by mechanical tests and positron annihilation lineshape analysis

Conference · Fri Oct 01 00:00:00 EDT 1999

OSTI ID:679507

Nakamura, Noriko; Ohta, Yoshio ^[1]; Yoshida, Kazuo ^[2]; Maeda, Noriyoshi ^[3]

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1. Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo (Japan). Research Inst.
2. Ishikawajima-Harima Heavy Industries Co., Ltd., Yokohama (Japan). Nuclear Power Div.
3. Japan Power Engineering and Inspection Corp., Tokyo (Japan)

Mechanical test and positron annihilation lineshape analysis have been performed on neutron irradiated pressure vessel steels, A533B1 steel and the weld metal. Marked changes in the mechanical properties were observed for both metals after the neutron exposure. S-parameters, the positron annihilation parameters, also increased after the neutron irradiation but only the small change was observed in the different levels of neutron fluence. The change in S-parameter and the mechanical properties were well correlated. It is concluded that changes in embrittlement induced by radiation can be monitored by positron annihilation lineshape analysis but detectability is dependent on the materials.

• OSTI ID: 679507
• Report Number(s): CONF-960643-; TRN: 99:009440
• Resource Relation: Conference: 18. symposium on effects of radiation on materials, Hyannis, MA (United States), 25-27 Jun 1996; Other Information: PBD: 1999; Related Information: Is Part Of Effects of radiation on materials: 18. international symposium; Nanstad, R.K. [ed.] [Oak Ridge National Lab., TN (United States)]; Hamilton, M.L.; Garner, F.A. [eds.] [Pacific Northwest National Lab., Richland, WA (United States)]; Kumar, A.S. [ed.] [Univ. of Missouri, Rolla, MO (United States)]; PB: 1261 p.; ASTM special technical publication 1325
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
22 NUCLEAR REACTOR TECHNOLOGY
PRESSURE VESSELS
REACTOR MATERIALS
STEEL-ASTM-A533-B
PHYSICAL RADIATION EFFECTS
EMBRITTLEMENT
WELDED JOINTS
CRYSTAL DEFECTS
MECHANICAL PROPERTIES