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Declassified record · U.S. Department of Energy

Decline of Gross Beta Radioactivity in Fishes at Rongelap Atoll to March 1958

Dated
Aug 5, 1958
Document type
Report
Length
5 pages
Open the original scanArchive record OSTI ID 16378182 · public domain

Document text

Machine-read from the scan, so expect some errors. Lines that couldn’t be read are left out.

Page 2

Decline of gross beta radioactivity in fishes at Rongelap Atoll to March 1958. This report extends the observations on Welander (1957) up to the spring of 1958 Rongelap fishes beyond that of before the series of - nations of this year,, and shows the trends on a log-log, rather Results appear separately in Table 1 and Figures 1 and 2 for liver, bone, and muscle of fishes at Kabelle and Rongelap Islands, and in Rongelap Lagoon chiefly in the vicinity of Rongelap Island. Data are most plentiful for Kabelle Island where four full years are represented, while at the other localities shown observations .twere not begun until nearly a year after the detonation of March 1, 1954 at Bikini At Kabelle and Rongelap Islands the last two observations are for July 1957 and March 1958. It will be noted that the decline during this period was greater at Rongelap Island than at Kabelle Island, bringing the present levels in ~c/kg of wet tissue at south and north ends of the atoll to about

Page 3

Rongelap Atoll Fish Source of after Locality data Date 3-1-54 Muscle Liver Bone Reef fish II 7/16/54 146 .5 22 2.9 Reef fish II 10/22/55 601 Lagoon fish 43:15 12/54 and

Page 4

RON GE LAP 1, DAYS AFTER MARCH 1, 1954 Fig. J. Decline over a period 1 to 4 years after the March 1, 1954 detonation at Bikini Atoll, of the gross beta radioactivity as measured in methane flow counters using samples of tissues of lagoon and Rongelap Island reef fishes collected at the indicated times at Rongelap Atoll. Dashed lines indicate lack of observations immediately following the Redwing series (R).

Page 5

DAYS AFTER MARCH 1, 1954 Decline over a 4- year period following the March 1, 1954 detonation Atoll of gross beta radioactivity as measured in methane flow using samples of tissues of reef fishes collected at the indicated Kabelle 1., Rongelap Atoll. “R” shows the time of the Redwing series.