1. TAA INTERNATIONAL ACTIVITIES research and testing reactors of various types at the United Kingdom Atomic Energy Research — Establishment at Harwell, while the remaining three are part of the dual-purpose Calder Hall station. . The third and final report of the committee appointed to examine the Windacale incident last year was published early in July.. The UKAEA decided to abandon the damaged Windscale - No. I reactor, but had made no decision regarding disposition of the undamaged No. 2 reactor. _ . TECHNICAL EXCHANGE AND ASSISTANCE United States —United Kingdom Cooperation During the July-September quarter United States teams visited the United Kingdom for classified and unclassified discussions on standard Calder Hall fuel element technology and unclassified Ciscussions on shielding and ruthenium chemistry. United Kingdom representatives visited the Argonne National Laboratory for classified discussions on graphite temperature coefficients and xenon instabilities. One af these representatives visited Hanford for unclassified discussions on the Physical Constants Test Reactor. . The first meetings pursuant to the new United States—United Kingdom agreement for cooperation on the uses of atomic energy for mutual defense purposes were held in Washington, D. C., in August and in Albuquerque in September. (See Part Il-Weapons.) Seventeen United States representatives were authorized to attend conferences on controlled thermonuclear research in the United Kingdom before and after the Geneva Conference. Preliminary proposals were under consideration for the exchange of United States and United Kingdom personnel engaged in controlled thermonuclear research for extended assignments. United States ~Canada Cooperation . _ oo, A number of visits were exchanged and conferences held with Canada on process develop- ment, heavy water power reactors, the NRU incident, shipments of NRX and NRU fuel elements, low-temperature neutron irradiation, the joint sheath program, and the actinjum and radium programs. United States — Australia Cooperation Professor J. P. Baxter, Chairman of the Australian Atomic Energy Commission, visited AEC headauarters and field installations for discussions on the United States—Australian agreement for cooperation, nuclear power, and the Combined Development Agency contracts for the ouipu: of the Rum Jungle and Radium Hill operations. Pre- and Post-Geneva Conference Discussions A number of AEC staff members and contractor representatives attended discussions in the United Kingdom, Belgium, France, and other countries, in their fields of interest, before and after the Second International Conference on the Peaceful Uses of Atomic Energy, held in Geneva September 1-13. These discussions included classified meetings in Belgium and the United Kingéom on feed materials and physical metallurgy, and classified discussions in the United Kingésm on fuel fabrication technology, reactor physics, and chemical processing. International Congress of Industrial Chemistry DOE ARCHIVES Represe=tatives of the AEC participated in the Thirty-first International Congress of : Industrial Chemistry, held in Liege, Belgium, September 7—18. Two United States papers were presented. UNCLASSIFleD . . = acre, SpstetevsO°% gg