NN re Sy Tyg eS FT . ra 7 soneending wes ty and Los Alamos Scientific Laboratory. The UCRL group is actively - underway with preparations to test thermonuclear weapon concepts in the next continental tests during the spring of 1953 (Operation | UPSHOT) and the next Pacific tests in late 1953 or early 1954 (Operation CASTLE). Full-Scale Weapon Tests King Shot - Operation IVY " 10. The thermonuclear shot (Mike) at Operation IVY has been described above. On November 14 (Eniwetok date) the highest yield fission explosion to date was successfully executed (King shot). DELETED. ‘The test was performed aS an air drop from a B-36. Preliminary esti- mates give a yield of ebout 550 kilotons TNT equivalent, which is more then 27 times the energy release of a nominal 20 kiloton DELETES . — Operations UPSHOT and KNOTHOLE, ll. — 4, PCE ARCHIVE wn bomb. (Nevede, spring 1953) Operation UPSHOT is a weapon development test of primary interest to the Commission. The detonétions being planned for this operation will be for the purpose of conducting component studies 7 2 ome