Speaker
Róbert Janovics
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
Description
Automatic water sampling unit was developed in Herteleni Laboratory of Environmental Studies of MTA ATOMKI for monitoring the radioactive emission from nuclear facilities into the groundwater. The efficiency of existing and renewed geometry units and the reproducibility of survey data have been examined in the course of this work. A testing method was developed for this purpose, and ion binding efficiencies of ion exchange resins were analysed for different ion concentrations. These efficiencies have to be taken into consideration when we estimate the amount of the contamination got into the groundwater on the basis of the proportion of ions gained back from the resin. The model tests were executed under controlled laboratory circumstances. These circumstances were tried to be formed into facts true to nature.
It has been found during the chain of tests that the sampling unit is suitable for well reproducible sampling. It can be told that all tested geometrical lay-outs are utilizable and work with proper efficiency in small/low range of concentration as well. Taking the different efficiencies into consideration the activities can be corrected in the case of every element if it is necessary. A correcting factor should be introduced during the 14C anion exchanging sampling because samples taken by exchanging have systematically lower radio carbon content than the reality has. We are working on continuing the tests. The gamma activity measurement of existing gained back cation samples and giving the exact value of 14C correction can give more reliable picture and direction to developing existing and possibly new systems.
Primary author
Róbert Janovics
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
Co-authors
István Somogyi
(Iontech Ltd, Litér, Hungary)
Dr
Mihály Braun
(University of Debrecen, Hungary)
Dr
Mihály Molnár
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
Mihály Veres
(Isotoptech Co. Ltd., Debrecen, Hungary)
Dr
Zsolt Stefánka
(Institute of Isotopes, Budapest, Hungary)
Árpád Bihari
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
