me oan -_ 46 ei) Project 2.65 = Analysis of Fallout ani of Base Surge ~- M, Morgenthau OBIZCIES The goenerel ohiectives of project 2.65 participation in REDWING were to: Obtain fallout samples on land ani ts perform radiophysical and radiochemical measurements on the samples; prepare dose rate con- tours of she atoll erea from information gathered by this project, other projects, and Rad Safe; ani evaluate the role of the base surce in transport of radioactive material. DESCRIPTION AND PXPEE IMENTAL FROCEDURYS -y Instrumentation was similar to that used for ad (CHFROKTFF), » On D-day, DA 1, ani dD 2 an serial survey of residual radiation was maje over the atol!) ty helicopter. The measurem-nts vere taken by meats “f a probe on a long cable suspeniel below the hovering helicopter, Base sur,« tetectors were installei on three 3ikini sta‘icns to recorit the arrival of the base surce, These iletectors collectal infor mation to be used in conjunction with Project 2.2 gamma versus time data and IFC data to evaluate the role of base surge as a carrier of railoactivity, Radlochetical analysis will be performed on the IFC semp)os in an attempt to establish whetber the base surge is @ conta inating event iniepenient of the fallout. RESULTS .o a Aerial survey data “or the are «hown in Table 2,65-). field readings were correctei for meter calibration ant readings S587 AVL ILE COPY ~hki- The

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