SYMPOSIA PAPER Published: 01 January 1999

Evaluation of Irradiated Pressure Vessel Steel by Mechanical Tests and Positron Annihilation Lineshape Analysis


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.

Author Information

Nakamura, N
Research Institute, Ishikawajima-Harima Heavy Industries, Co., Ltd., Tokyo, Japan
Ohta, Y
Research Institute, Ishikawajima-Harima Heavy Industries, Co., Ltd., Tokyo, Japan
Yoshida, K
Nuclear Power Division, Ishikawajima-Harima Heavy Industries, Co., Ltd., Yokohama, Japan
Maeda, N
JAPEIC Research Center, Japan Power Engineering and Inspection Corporation, Tokyo, Japan
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: E10
Pages: 559–567
DOI: 10.1520/STP13887S
ISBN-EB: 978-0-8031-5395-0
ISBN-13: 978-0-8031-2614-5