see @ 104°. Peo: - Project 21.3 - Short Half-life Activities - PF. Momyer Another phase of Project 21.3 was engaged in findirg total tritium in the cloud, This was done in the following manner: Carrier amounts of heavy water, krypton anid xenon vere adie! to the collection bottles prior to the progran, The collection system corsiste! of filters “or particulate matter am collection bottles mounte? on the sampling planes, Gas samples vere collecte? at varicus altitudes ar! times following the detonation and returned to Parry for separation. Krypton, xenon, water and carbon dioxide vere separated from the gas sample and molybdenur was separated from the filter sample, Krypton, xenon and molybdenum were collected to “etermire fissiona per collection bottle, The remaining activities, cl4 and fl vere returned to the laboratory, as barium oarhonate and water for the determination of total tritium and possibly cl yield. e , The fission bottle data are shown in Table 2]. 3-1. BEST AY/J.451.5 COPY =

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