title: Underwater gamma surveys of Mururoa and Fangataufa lagoons.
abstract: Underwater gamma-ray spectrometry is an effective alternative or complement to traditional sampling and laboratory analyses for applications such as contamination assessment in emergency situations, long-term monitoring of radioactive releases or investigation of sunken radioactive objects. This technique was recently used in a seabed contamination study undertaken at the South Pacific nuclear weapons test sites of the Mururoa and Fangataufa atolls in order to guide and focus sediment core sampling in the areas with highest gamma-emitting radionuclide levels. 60Co inventories estimated on the basis of the underwater gamma-ray spectrometry survey were in good agreement with results previously obtained by traditional sediment sampling and laboratory analysis.
authors.affiliation: International Atomic Energy Agency, Marine Environment Laboratory, Monaco. i.osvath@iaea.org
authors.forename: I
authors.initials: I
authors.lastname: Osvath
authors.forename: P
authors.initials: P
authors.lastname: Povinec
authors.forename: L
authors.initials: L
authors.lastname: Huynh-Ngoc
authors.forename: J F
authors.initials: JF
authors.lastname: Comanducci
mesh_terms: D019015:Geologic Sediments / Q000737:chemistry*; D009689:Nuclear Warfare; D010139:Pacific Islands; D010140:Pacific Ocean; D011834:Radiation Monitoring; D011847:Radioactive Fallout / Q000032:analysis* / Q000706:statistics & numerical data; D011868:Radioisotopes / Q000032:analysis; D012623:Seawater / Q000737:chemistry*; D013051:Spectrometry, Gamma / Q000379:methods / Q000706:statistics & numerical data; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014878:Water Pollution, Radioactive / Q000032:analysis* / Q000706:statistics & numerical data
chemical_list: D011847:Radioactive Fallout; D011868:Radioisotopes; D014875:Water Pollutants, Radioactive