NO. SOVIET NUCLEAR EVENTS (Yield in Kilotons) Inclusive Total Fission Yield * 60 500 194501951 1952-1954 1, 000 21,000 1955-1956 1957-1958 * A value of 50% has been arbitrarily selected for the fission to total yield ratio for all Soviet thermo- nuclear tests. As indicated in the tables, 50% is about the average fission to total yield ratio for all US/UK thermonuclear tests. TABLE NO. 20 02309 wee tee gee 2

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