Minutes of meeting of Biology Division members concerning P-10 problems, July 18, 1950 Page: 3 of 8
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1 1 , 1
e'raluation of hazards, and mochanisma Of entry of tritium into biological 8ystcr,
Oapocially tho huran body.
In the course of production, contamination has become fairly videoproad in
t :o production laboratories. Cortain persona, especially glass-blowers have
boon found to have cncntrations above MpC's at timos.
RC Thorburn outlined brioflj methods of P-10 production.
Inatr monte for detecting contamination havo boon dovoloped. Air exhaust
lines aro monitored with Kanno chambers which aro ionization chambers using a
vibrating rood to moasurc currort carried by ion pairs formed. Peto, conisting
of an upon-windowod probo with mothano flowinG through it connected to an ASP
scalor, DOMiquantitativoly detects surfaco contamination. It is virtual
impossible to detect quantitativ,ly tho amount of tritium on a surface einco
tho bota radiation is so woak that only tr-.tiu, very near tho surface can bo
detected. Quantitioc of oxido in tho air can be moaaurod by absorption on
calcium chloride and assaying tho water far tritium. This is done by allowing
tho water to roact with calcium carbide to fors acetylono which is dolivorod to
an ionization chamber, tho current being measured with a vibrating roed electro-
motor. This method is sennitivo to about 2 pc/liter ordinarily, but can detect
as little as 1 pc/litor with extreme caro. Organic material such as tinsucs can
bo burned, tho wator collected and ascaycd y this method. Tho method is slow;
with prosent facilities in tho biology building noven samples par day can bo run.
EVrlW OF ACTIVITIs OF BIOIGY 1)IVISION ON P0
0
CW DoLong: Rj have boon oxpoaod in the hoods of 1C8 B, burned, and the water
assayod by tho acotylono method. In the first series, rat #1 oxposod through
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Getzendaner, M. E. Minutes of meeting of Biology Division members concerning P-10 problems, July 18, 1950, report, August 8, 1950; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1310350/m1/3/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.