Project 2.56 - FALL~OUT DISTRIBUTION STUDIES | 1. 2) hai Project Officer - E. F. wilsey Objectives The objectives of this project include the collection of fall-out samples for the documantation of physical characteristics as a function | o of time and distance and to provide sanples for radiochemical analysis by Project 2.6b. Instrusentation One intermittent fall-out collector was placed on the Project 6.5 barge anchored near the reef southwest of Bogallua and on each of the 3 following islands: Bogallua, Bogombogo, Ruchi, Bogon, Engebi, Kirinian, S.: Bokonoaarappu, Aitsu, Biijiri, and Rigili. = to sample at 30 minute intervals for a total time of 12 hours. These instruments wre set A second instrunent, sefé for 5 minute intervals for a total tims of 2 hours was located on Ruchi and Bogon. All instruments were set to begin sampling after the first water wava, assumed to be traveling at lO mph, had pas- sed the stations; the delay ranged from 5 minutes at Ruchi and Bogon to 26 minutes at Rigili. The collectors operated at Logallua, Bogombogo, Engebi, Bokonaaraspu, and Aitsu. The battery compartments of the stations on Ruchi and Bogon . vere daneged by the shock wave. . a t EAT ag 7% Results Y aqen {DOE Recovery was carried out on the afternoon of 15 May 195k. . PP ETN |OrH 9: | OF 951 «-srem~ reepateN seo Recovery - turned by a water wave. The instrucent on Kirinian was over- The blueboxes did not trigger at the Biijiri and Rigili4 stations. Only fall-out of very low activity was collected by the stations Which operated. All samples were shipped to ACC for analysis. ~SO- <= . g Jb