a oe UNITED STATES ATOMIC’ ENERGY COMMISSION WASHINGTON, D.C. 20545 a eeee eree i December 23, 1974 Warren D. Johnson Lieutenant General, USAF Director Defense Nuclear Agency Washington, D. C. 20305 Dear General Johnson: Please refer to my letter of December 9, 1974, transmitting AEC comments on the Draft Environmental Impact Statement for Clean Up, Rehabilitation, Resettlement of Enewetak Atoll - Marshall Islands. It is requested that our comments be revised to include the follow- ing additional information: _ During the last 8 years the Nuclear Energy Agency (NEA), formerly the European Nuclear Energy Agency (ENEA), has Managed an ocean disposal program for radioactive wastes from the member countries. The following, by years, is a listing of the curies (Ci) of alpha activity in the materials so disposed. be Pu 239. ee re ne ‘ 1974 1973 1972 1971 - 416 773 674 324 The alpha activity is assumed to 1970 1969 1968 1967 - 233 - 390 - 721 - 92 a Total 3633 Ci - aipha Other operations from 1949 to 19677 such as U.S. and U.K., disposed of wastes containing similar quantities of long- would not materially add to the alpha activity already disposed in the deep ocean. cc: H&N,Mr. Woolfenden) - 1/8/75 We:sina Thus, a total of at least If we assume 15 grams of Pu per Ci alpha activity, the total is at least 100 kilograms of Pu. Thus, it is evident the disposal of a few hundred grams of Pu from Enewetak Atoll Ri beet Phat a lived alpha active materials. 7,000 alpha Ci have been disposed of into the ocean. AFRRI, Mr. Slaback)