Laka Foundation

Publication Laka-library:
Medical survey of Rongelap people five and six years after exposure to fallout. BNL 609 (T-179) (1960)

AuthorR.A.Conard
DateSeptember 1960
Classification 4.26.4.00/10 (PACIFIC - US TESTING AREA)
Front

From the publication:

MEDICAL SURVEY OF RONGELAP PEOPLE FIVE AND 
SIX YEARS AFTER EXPOSURE TO FALLOUT

Introduction

The results of medical surveys of the people of Rongelap in the Marshall Islands, 
carried out in March 1959 and in March 1960 at 5 and 6 years after the accident, 
are presented in this report. These people had been accidentally exposed to fallout 
radiation following a detonation of a high yield thermonuclear device during 
experiments at Bikini in the Pacific Proving Grounds in March 1954. An unpredicted 
shift in winds caused a deposition of significant amounts of fallout on four inhabited 
Marshall Islands to the east of Bikini (see Figure 1) and also on 23 Japanese 
fishermen aboard their fishing vessel, the Lucky Dragon. Of the inhabitants of the 
island of Rongelap, 105 nautical miles away from the detonation, 64 received the 
largest fallout exposure: an estimated dose of 175 r of whole-body gamma radiation, 
contamination of the skin sufficient to result in beta burns, and slight internal 
absorption of radioactive materials through inhalation and ingestion. Another 18 
Rongelap people away on a nearby island (Ailingnae), where less fallout occurred, 
received only an external gamma dose of about 69 r. There were 28 American 
servicemen on the island of Rongerik further to the east who received about the 
same amount of radiation as did the Rongelap people on Ailingnae. Lastly, 
157 Marshallese on Utirik Island, about 200 miles further east, received about 
an estimated 14 r of whole-body radiation. The fallout was not visible on this 
island and no skin effects developed.
The exposed people were evacuated from these islands by plane and ship about 
two days after the accident and taken to Kwajalein Naval Base about 150 miles 
to the south, where they received extensive examinations for the following three 
months. In view of the generally negative findings on the American servicemen, 
they were later returned to their duty stations.

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