a et wa (2UNT) Project 2.65 = Analysis of Fallout and of Base Surge - M. Morgenthau OBJECTIVES The general objectives of project 2.65 participation in REDWING were to: Obtain fallout samples on land ani to perform radiophysical and radiochemical measurements on the samples; prepare dose rate con- tours of the atoll area from information gethered by this project, other projects, and Rad Safe; and evaluate the role of the base surge in transport of radioactive material. DESCRIPTION AND YXPTRIMENTAL PROCEDURES eat” of ean ON e\v,.- y Instrumentaticn was similar to that used for (CHEROKTE), On D-aay, D #1, and D # 2 an aerial survey cf residual radiation was maje over the atol] by helicopter. The measurements were taken by means of a probe on a long catle suspented belew the hovering helicopter, Base surge detectors were installed on three Bikini stetions to recor? the arrival of the base surge. These detectors collected infor- mation tc be used in conjunation with Project 2.2 gamma versus time data and IFC data to evaluate the role of base surge as a carrier of radioactivity. Radiochemical analysis will be performed on the IFC samples in an attempt to establish whether the base surge is a contaminating event independent of the rene RESULTS co ye we Aerial survey data for _— | are shown in Table 2.€5-1. The field readings were corrected for meter calibration and readings ’ CGPIED ret LANG FC Jv

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