C
:
Dr. W. F. Libby, Commissiorer
as
1901 Constitution Avenue, N. W.
Washington 25, D. C.
ChA
roy.
CLASSIFICATION
Dear Bill:
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BY, AUTHORITY OF DoE/
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CANCELLED
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I had hoped to get this data and report in smoother shape before
you looked at it but events have prevented this. The opinion which I
express@to Dr. Scoville, copy of which letter I sent to you is based on
considerations outlined very roughly in the following paragraphs.
Fig. 1 shows a map of the United States with the general areas
from which we expect tritium releases. The numbers in parentheses
on this map indicate the number of curies per month which we estimate
are current releases from these locations based on a yough integration
of past performance, Fig. 1 also shows the locationmeasurements
© which will be discussed in the following paragraphs.
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Fig. 2 shows a chart of the Savannah River plant with a code of
3 various locations at which tritium measurements have been made.
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Fig. 3 is a table showing the actual measurements made in rain
RintFig. 2.
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etc., at the various locations indicated
These measurements were made at the Savannah River
ni rks last year (1955) and you will note that the maximum values are
™ 1p around 9000 tritium atoms per 10°"
protium atom,
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U. S. Atomic Energy Commission
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Fig. 4 shows tritium measurements at Savannah River in 1956
{poring about the same part of the year May and June as those made
3] . 2,
The 200H,200F and the 100P areasare indicated in pencil on
There are two things to note in this Table.
First, the tritium
Second, the
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-F peings exceed those obtained in 193° by a very large factor. The
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€ ‘highest reading being 334,000 T/J0°°H in water vapor as opposed to
SF Ft highest reading of about T/10!8y 2000 in the previous year.