Conveners
Session 13 (cn't of Session 12) - Radioactive elements in the environment, radiation archeometry and Health Physics
- Gabriele Wallner (University of Vienna, Austria)
- Sue Clark (Washington State University, USA)
Prof.
Borut Smodiš
(Jožef Stefan Institute)
21/09/2012, 11:00
Radioactive elements in the environment, radiation archeometry and Health Physics
Invited Lecture
Inexpensive analytical tools such as gamma spectrometric measurements are usually applied in radiological monitoring of contaminated areas. However, detection limits obtained by such methods may not fit for the purpose, in particular when biological materials are to be analysed, so more sensitive techniques have to be considered. Appropriate option is radiochemical determination involving...
Prof.
Yasuyuki Muramatsu
(Gakushuin University, Japan)
21/09/2012, 11:20
Radioactive elements in the environment, radiation archeometry and Health Physics
Invited Lecture
A large amount of radionuclides was released from the accident of Fukushima Daiichi Nuclear Power Plant in March 2011. We have studied distribution of radiocaesium and radioiodine in the environment and their transfer to agricultural products. Shortly after the accident, high iodine-131 concentrations were observed in leaf vegetables harvested in Fukushima and surrounding Prefectures. The...
Dr
Sergio Manera
(LENA - University of Pavia, Italy)
21/09/2012, 11:40
Radioactive elements in the environment, radiation archeometry and Health Physics
Invited Lecture
The aim of this study, performed on a sample of 2011 (year of the nuclear accident of Fukushima) green tea from the Japanese Prefecture of Shizuoka, was to measure by gamma spectroscopy the natural and artificial radioactivity and the dishomogeneity index of the sample, but also a more in depth investigation of the ratio of the two radionuclides of Cesium and the relative transfer mechanisms...
Prof.
Manuel Navarrete
(Faculty of Chemistry, National University of Mexico, Mexico)
21/09/2012, 12:00
Radioactive elements in the environment, radiation archeometry and Health Physics
Invited Lecture
Ancient raw materials are degraded and finally detroyed, mainly by humidity taking up dissolved salts from soil, which are deposited on walls surface breaking plasters and material structure as time goes by. This process is added to environment humidity and temperature changes, but in any case is proportional to porosity materials. This is why, such materials as limestone, sand stone and...
Prof.
Paolo Randaccio
(University of Cagliari, Italy)
21/09/2012, 12:20
Radioactive elements in the environment, radiation archeometry and Health Physics
Invited Lecture
The radioactivity analysis often requires a very high sensitivity to detect minute traces of both natural and artificial radioisotopes. In many cases, to obtain the required sensitivity is necessary to carry out a concentration of the element to be determined. The measurement of the activity can be done by the alpha or gamma spectrometry according to the type of emission of the radioisotope to...
Dr
Taeko Shinonaga
(Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, Germany)
21/09/2012, 12:40
Radioactive elements in the environment, radiation archeometry and Health Physics
Oral Communications
The isotopic composition of uranium (U) in aerosol samples collected before and after the accident of the Fukushima Daiichi nuclear power plant (FDI-NPP), occurred on March 11, 2011, was studied. The aerosol samples were collected on filters by an air sampling system in Tokai, Japan (at 120 km south-southwestern of the FDI-NPP). The filter samples were divided into several parts and U isotopic...
Prof.
Flavia Groppi
(LASASegrate, Università degli Studi di Milano, Italy)
21/09/2012, 12:55
Radioactive elements in the environment, radiation archeometry and Health Physics
Oral Communications
An earthquake of magnitude 9.0 occurred on March 11, 2011 on the Pacific Ocean side of northern Honshu, Japan, followed by a tsunami that struck the east coast of the Tohoku region and caused a serious nuclear accident at the Fukushima Daiichi Nuclear Power Plant. The contaminated air masses were transported across the Pacific towards the North American continent, Europe and Central Asia ...
Dr
José Antonio Corcho Alvarado
(Institute of Radiation Physics, Lausanne University Hospital, Switzerland)
21/09/2012, 13:10
Radioactive elements in the environment, radiation archeometry and Health Physics
Oral Communications
Here we report some new experimental results on the content of the long-lived plutonium radionuclides (238Pu, 239,240Pu, 241Pu) in the upper tropospheric and lower stratospheric aerosols. Plutonium radionuclides have been injected into the atmosphere by different processes (ex. nuclear weapon tests (NWT), burn-up of the satellite SNAP-9A, accidents in nuclear facilities, etc.). However,...
Dr
Samer Amayri
(Johannes Gutenberg-Universität Mainz, Institute of Nuclear Chemistry, 55099 Mainz, Germany)
21/09/2012, 13:25
Radioactive elements in the environment, radiation archeometry and Health Physics
Oral Communications
The synchrotron radiation based techniques X-ray fluorescence (XRF) and X-ray absorption spectroscopy (XANES: X-ray absorption near edge structure) have been used to determine the distribution and the chemical speciation of plutonium (Pu) after sorption and diffusion in Opalinus Clay (OPA, Mont Terri, Switzerland). Thin sections of OPA were contacted with 20 µM Pu(VI)-242 in OPA pore water (pH...
