so een re eas : en cep eee Seo RE ee mE suite in surface waters of the United States in 1966 reported by Moghissi and Porter (1968). Koranda (1965) has shown that there is approximately 10° times more tritium in bound water than in loose water in soils at Eniwetok Atoll, but that there is little exchange of the bound water with the loose water. Hence, it is probable that there will be no major changes in the tritium concentration of well water at Bikini Atoll. Algae collected from the wall of the drained cistern at Bikini I. in June 1970 contained 100 pCi/g dry weight of 3577-9 5Nb , presumably from the French nuclear tests in the South Pacific. Marine algae collected at the same time from the reefs at Eneu I. contained 0.1 pCi/g of 957 7-95Nb dry weight. 4.6 CONCLUSIONS Bikini can be expected to remain a useful area for the study of the redistribution of radionuclides for at least several decades. This is especially true since rapid advances are being made in the technology of radionuclide detection. The present levels of radionuclides and their distribution at Bikini are not likely to change significantly except for a decrease in amounts from physical decay. Exceptions are expected where physical disturbances occur during the replanting on land. If one of the rare typhoons should strike Bikini, there would be a major redistribution of the fine sediments, either a redistribution within the lagoon, a flushing from the lagoon, or both. POP AT lh 15