This is the official record of the International Symposium on "The Role of Nuclear Engineering for an Uncertain Future" which was held on No vember 5 and 6, 1980, at Keidanren Hall in Tokyo, in connection with the 20th Anniversary of the Nuclear Engineering Department, Faculty of Engineering, University of Tokyo. Eight specialists from all over the world were invited to contribute papers to the symposium, and the professors of our Department presented a paper each. The Symposium was divided into seven sessions, chaired by profes sors of the Department according to their specialties. About 200...