UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE mn Approved 8 MB No. 0704-0188 Eeeee on 30 F986 REPORT DOCUMENTATION PAGE Ja. REPORT SECURITY CLASSIFICATION lb RESTRICTIVE MARKINGS 2a. SECURITY CLASSIFICATION AUTHORITY 3. DISTRIBUTION / AVAILABILITY OF REPORT UNCLASSIFIED N/A since Unclassified Approved for public release; distribution is 2b. DECLASSIFICATION / DOWNGRADING SCHEDULE N/A since Unclassified unlimited 4 PERFORMING ORGANIZATION REPORT NUMBER(S) 5. MONITORING ORGANIZATION REPORT NUMBER(S) WT~1625(EX) Sa. NAME OF PERFORMING ORGANIZATION l-Naval Radiological Defense Laboratory 6b Fane over 7a. NAME OF MONITORING ORGANIZATION If applicable. . Defense Atomic Support Agency Sc. ADDRESS (City, State, and ZIP Code) 76 ADDRESS (City, State, and ZIP Code) 1-San Francisco, CA Washington, DC 8a. NAME OF FUNDING / SPONSORING 8b. OFFICE SYMBOL ORGANIZATION 9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER (If applicable) Be. ADORESS(City, State, and ZIP Code) 70, SOURCE OF FUNDING NUMBERS PROGRAM ELEMENT NO PROJECT NO TASK NO WORK UNIT ACCESSION NO 14 TITLE (Include Security Classificatron) OPERATION HARDTACK—PROJECT 2.8 Fallout Measurements by Aircraft and Rocket Sampling, Extracted Version 12 PERSONAL AUTHOR(S) Whitcher, S$.L.; Bunney, L.R.; Soule, R.R.; and daRoza, R.A. 13a. TYPE OF REPORT 13b. TIME COVERED 14 DATE OF REPORT (Year, Month, Day) FROM ____ TO _____ 610929 }15 PAGE COUNT 84 16. SUPPLEMENTARY NOTATION This report has had sensitive military information removed in order to Provide an unclassified version for unlimited distribution. The work was performed by the Defense Nuclear Agency in support of the DoD Nuclear Test Personnel Review Program, 17 FIELO 18 18 COSAT! CODES GROUP 3 8 . 18 SUBJECT TERMS (Continue on reverse if necessary and identify by block number) $U8-GROUP Hardtack Fallout Aircraft Sampling 19 ABSTRACT (Continue on reverse if necessary and identify by block number} The general objective of this project was to estimate, from analytical data on cloud samples, the relative distribution of certain radionuclides between the local and worldwide fallout formed by megaton-range detonations on land and water surfaces, with particular emphasis on the distribution of Sr?° and Cs!37 between local and worldwide fallout. Specific objectives were to: (1) obtain airborne particle and gas samples by rocket and aircraft sampling techniques; (2) determine the distribution of radionuclides between two groups of particles that differed from one another in their falling rates in air and that could be considered representative of local and worldwide fallout; (3) attempt to determine an early time distribution of radionuclides and particles between the upper and lower halves of the Cloud and radially outward from the cloud axis; and (4) estimate the extent of separation of fallout from gaseous fission products by fission determinations on gas and particle samples collected coincidentally near the top of the cloud at various times following the shots. 20 DISTRIBUTION / AVAILABILITY OF ABSTRACT CU uncLassi-ieDruNuimiteD (] same as RPT 22a. NAME OF RESPONSIBLE INDIVIDUAL Mark D. Flohr OD FORM 1473, 84mar 21 ABSTRACT SECURITY CLASSIFICATION Co otic users UNCLASSIFIED 226 TELEPHONE (Include Area Code) 22c OFFICE SYMBOL (202) 325-7559 DNA/ TSCM 83 APR edition may be used until exhausted All other editions are obsolete j SECURITY CLASSIFICATION OF THIS PAGE UNCLASSIFIED