Order number page 9 set 5 wi - =0 01 Society, Sydney (Australia) AIX-20:045053; EDB-89:086438 880000 unclassified We conducted an analysis in Japan of the highly radioactive fall-out on the Japanese fishing’boat No. 5 Fukuryu Maru that was engaged in fishing about 150 km east of Bikini at the time of the thermonuclear test conducted early in the morning of 1 March 1954, and which returned to Japan in the middle of the same month. CHERNOBYLSK-4 REACTOR/contamination ; PUBL.ANNOUNCEMEN T PUB. DATE (YYMMDD ) CLASSIF. LEVEL T EXT ABSTRACT 801. KEYWORD(S) overt 750. 371. 34. 950. => 1QFFICIAEUSE ONLY 940406-17 1827- FALLOUT/global aspects/japan ;FISSION PRODUCT RELEASE/; PERSONNEL/radiation accidents ;REACTOR ACCIDENTS/contamination ;AIR;BETA DETECTION; BETA SPECTRA; BIKINI; CALCITE; CESIUM 137; CONTAMINATION; COMPARATIVE EVALUATIONS ; DUSTS; JAPAN; GAMMA RADIATION; FALLOUT; IODINE 131; IRRADIATION; ISOTOPE RATIO;KRYPTON 85;FALLOUT; PARTICLE SIZE;PERSONNEL; RADIATION DOSES; RADIATION SYNDROME ; RADICACTIVITY; RARE GASES; SEAFOOD; SOCIO-ECONOMIC FACTORS; SOURCE TERMS;ATOMIC EXPLOSIONS; URANIUM 237 Item 17 150. 110. 70. 710. 750. 371. 950. REPORT NUMBER PRIMARY TITLE (M) DOE /NBM--5002794 Operation HARDTACK II: underground explosions PERSONAL AUTHOR( M) Carder, D.S.; Murphy, w.Vv. CORPORATE SOURCE PUBL.ANNOUNCEMENT PUB. DATE (YYMMDD ) ABSTRACT Coast and Geodetic EDB~-85:014932 surface motions L.M.; Survey, Pearce, from T.H.; Mickey, Washington, DC (USA) 600401 Ground effects resulting from certain HARDTACK II underground explosions were measured by strong-motion and teleseismic seismographs from 2000 ft to distances of nearly 100 miles. In addition, many temporary seismographs were operated by a number of organizations to distances of nearly 2400 miles, and routine seismographs continued to operate on a worldwide basis. Some of the results are given in this report. For safety purposes, predictions of ground effects, using formulas derived by the Coast and Geodetic Survey from pre-Rainier H. E. tests and modified slightly as a result of the Rainier tests, hold with reasonable accuracy. However, it is believed that low “frequency ground displacements in the distance ranges covered in this report attenuate, with absorption, as the first power of the distance. An energetic wave believed reflected from the surface near the source was recorded by some of the strong-motion seismographs. It is out of phase with the initial wave and follows it by about a 9003383 OFICIAL USE ONLY