At 2:10 p.m, Dr, J, ©, Bugher and Capt. W. L. Guthrie of the AEC;
Fall-out
Gen. A. R, Lusdecke, Dr. H, S. Scoville,. Col, H. H, Kaesser, and Capt. .
Problem
R. H, Maynard of the AFSWP; and Dr. Lester Machta of the Weather Bureau
entered,
Gen, Fields, Dr. Graves, Dr, Mark, and Dr. Fine remained for
the discussion.
In addition to the Committee, the Acting Secretary and
Mr. Tomei were also present.
cee
eatinMtoe fe pg peas
IFrom avaliable ‘data. it sippears thatinanarea ofov
over
er 5,000square,
—
ep
ocean, a dose of 500 ri would have been dbtained in the first 50
hours from shot~time; and in an area of over 1,000 square miles, a dose ~
of 2,000 r would have been obtained in the first 50 hours.
It was
pointed out that the natives on the island of Rongerik received 150 r
before being evacuated.
| Dr, Bugher then1 mentioned that ‘the particlesw
which fell out on the
Japanese ships were about 300-350 microns in size.
Dr. Graves said the
particles from the barge shots were 10-50 microns in gize, and more
~ goluble than the particles from the other shots. The smaller particles
fall slower, and therefore the 500 r area is amaller and the 200 r area
larger from the barge shots,
.