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Declassified record · U.S. Department of Energy

Memo to Chairman Seaborg, Et Al, Subject: Questions and Answers on Bikini (Enclosure: as Stated Above)

Dated
Aug 2, 1968
Document type
Correspondence
Length
7 pages
Open the original scanArchive record OSTI ID 16381678 · public domain

Document text

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

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A. Bikini is an atoll containing 26 islands surrounding a fresh water lagoon, located approximately 11 degrees north of the equator on the northwestern fringe of the Marshall Islands in the Central Pacific. Bikini atoll is about 25 miles long and 15 miles wide and contains a total land area of 2.32 square 2. Q. WHY WAS BIKINI A. Because it was CHOSEN AS A TEST SITE? far from densely populated areas and the prevailing winds could blow the fallout from the tests into the vast uninhabited stretches of the Central Pacific. 3. Q. WHERE DID THE BIKINIANS LIVE BEFORE THEY LEFT THE ATOLL? A. Bikini was the home island, and regular trips were made to the other islands for copra production, hunting, fishing or 4. Q. WILL THE ISLANDS BE ABLB TO SUPPORT THE BIKINIANS? A. Not as they are right now. Food producing plants have been by the scrub vegetation--somewhat like weeds taking that has been uninhabited for many years. A. Yes, there is some type of density varies, however. On the islands all the islands; the nearest the tests where the topsoil was blown or washed away along with most of

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the vegetation, the density is relatively low. On Bikini and Eneu, however, the survey teams had to hack tunnels through it. The vegetation was too thick and too tangled to be cut 6. Q. WHAT KIND OF MEASUREMEXIS WERE MADE ON THE ATOLL? A. External radiation was measured with a variety of instruments. Samples of soil, water, fish, birds and marine life were collected and brought back to the laboratory for precise measureThe data from all sources were analyzed and evaluated in a package for review by the consultants’ committee. THE CONSULTANTS DECIDE BIKINI IS SAFE? A. They reviewed measurements and data that had been accumulated during past surveys, then met with the 1967 survey team. Calculations were made possible sources if the total fell well of the total radiation exposure from all the natives were returned. In their opinion within acceptable limits. 8. Q. DOES THE REPORT MEAN THAT THERE IS NO RADIATION ON THE ISLANDS? A. NO. It means that in the opinion of the ABC and consulting < experts the type and level of radiation do not offer serious threat to health and safety.

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HOW MUCH RADIATION WILL THE BIKINIANS BE EXPOSED TO? That will depend on whether or not the consultants’ recommendations are followed. Under the worst conditions, with all of the recommendations ignored, both the internal and external accumulated dose in five years and beyond still would be within acceptable limits set by cil for individuals not engaged in calculated figures for accumulated (If needed, the Federal Radiation guides for individuals are:) the Federal Radiation Counatomic energy work. The whole body doses Individuals in a Population The general philosophy, based on both experience and research, is that .5 rads per year provides an acceptable level for individuals. This value may be used where sufficient monitoring is performed so that radiation exposures are known. WHAT ABOUT THE RATE OF ACCUMULATION OF RADIATION? The rate will be most rapid within the first five years, dropping off rather quickly after that.

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WHERE DOES THE RADIATION ON THE ATOLL COME FROM? From radionuclides in soil and vegetation and, on some of the islands$ from large smounts of radioactive scrap metal. The levels vary considerably from one island to another. It is for that reason that Eneu and Bikini were suggested as village sites since these two islands have lower levels. WHY ARE THE ISLANDS SAFE NOW WHEN THEY WEREN’T A FEW YEARS AGO? Radioactivity decreases with the passage of time. Some radionuclides disappear faster than others. Altogether it is a combination of the passage of time and the wrk of nature in diffusing and dispersing the radionuclides. Readings taken in 1964, for instance, were several times higher than those of 1967. HAS THE RADIATION ON BIKINI CAUSED FREAKS AND MUTATIONS IN PLANTS In 22 years of visiting the atoll, scientific survey teams have never found any evidence of a radiation induced mutation or HOW DO RADIATION LEVELS ON BIRINI COMPARE WITH THOSE IN THE On Bikini Island itself, radiation levels are somewhat higher than in most parts of the U. S. on certain portions of the atoll there are levels below those found in most parts of the U. S.

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15. Q. WHAT IS A PANDANUS TRXE? A. Pandanus fruit is a native diet staple, supplying certain needed vitamins. However, the edible portion of the fruit tends to have a higher level of strontium 90 and cesium 137 than certain other plants grown in the gestion for cutting Island by replacing same soil. The consultants have made a sugthese levels down considerably on Bikini the top inch or two of soil which contains most of the radionuclides. On Eneu there precautions since the soil there contains 16. Q. WHY ARE COCOANUT CRABS TO BE REMOVED? A. The cocoanut crab is a native favorite, is no need for such only a minute amount but it has been observed to contain considerable amounts of strontium 90 and cesium 137. In most shellfish, strontium 90 is deposited in the shell. This crab eats his own shell when he molts, and in doing in his body. A. Cocoanuts take up moderate amounts of radioactivity (much less than pandanus fnit). Suitable planting procedures can reduce even this small amount of uptake. There are not many cocoanut trees on the atoll now. On most of the islands the tops of the cocoanut trees were snapped off by the force of the test blasts. On the islands most affected by the tests, the trees were burned off or washed away. It is expected that new cocoanut trees will be planted on the islands.

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WILL THE BIKIHIANS BE ABLE TO Yes. The sumey team reports fish. The marine life is low IS THERE ANY RADIATION IN THE FISH IN THE LAGOON? the lagoon is loaded with edible Some fish and birds contain small amounts of radionuclides they have retained from what they’ve eaten, but the amount large enough to cause concern. WOULD YOU CONSIDER BIKINI SAFE IF AMERICANS WERE TO LIVE THERE? It would probably be even safer for Americans, since Bikinians live off the natural resources of the islands, which complicates their situation from a radiological point of view. Some of their locally produced foods tend to take up radionuclides.