A Mechanical Spectroscopy Study of Neutron Irradiation and Thermal Ageing of Reactor Pressure Vessel Steels K. Van Ouytsel, R. De Batist, A. Fabry, F. Poortmans and R. Schaller J. Phys. IV France, 06 C8 (1996) C8-825-C8-828 DOI: 10.1051/jp4:19968177