The Symposium on Irradiation Effects on Structural Alloys forNuclear Reactor Applications was presented at Niagara Falls,Canada, 29 June-1 July 1970, in conjunction with the Seventy-thirdAnnual Meeting of the American Society for Testing and Materialsheld in Toronto, Ontario, Canada, 22-26 June 1970. The symposiumwas sponsored by ASTM Committee E10 on Radiosotopes and RadiationEffects. A. L. Bement, Jr., Battelle Memorial Institute, PacificNorthwest Laboratory, served as chairman of the symposiumcommittee, which consisted of J. Moteff, cochairman, and K. M.Zwilsky, C. J. Baroch, E. Landerman, and L. E. Steele. The sixsessions were presided over by L. J. Chockie, D. R. Harries, W. R.Thomas, R. Bullough, J. Moteff, and H. Bohm. Two agenda discussionsessions also were presented to survey the status of twocontemporary problem areas.