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Hot particles analysis originating from failed and damaged fuels

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Kerkápoly A., Vajda N., Pintér T., Csordás P.
Open Chemistry
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2005
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vol. 3
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issue 1
106-117
EN
The increase of activities of fission products and transmutation products in the primary coolant of a nuclear power plant indicates the presence of fuel rod failures. The measurement of the activity concentration of the primary coolant was able to detect fuel failures in the reactor core. Microanalytical methods for examining individual hot particles have been developed and applied to fuel failure detection under normal operation conditions as well as during the severe fuel damage that occurred in the cleaning tank incident at Unit 2 of NPP Paks in April 2003. Several faulty fuel rods can be detected simultaneously by the characterization of individual hot particles originating from the primary water. The analysis of particles originating from the damaged fuels provides information relating to the dissolution process of the fuel debris.
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Natural radioactivity in virgin soils and soils from some areas with closed uranium mining facilities in Bulgaria

100%
Yordanova I. I., Banov M. D., Misheva L. G., Staneva D. N., Bineva T. K.
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issue 1
EN
The natural radionuclide (238U, 226Ra, 232Th and 40K) contents in soil were determined for three different regions of Bulgaria using high-resolution gamma-ray spectrometric analysis. A comparison of the dynamics of their behavior throughout the years was performed. Bulgaria is a country with intensive uranium mining activities. That is why radiological monitoring of closed uranium mining facilities in different regions of the country are obligatory and of great interest. This work presents results from such investigations made in regions where remediation was necessary. The results have been evaluated according to Bulgarian radionuclide environment contamination legislation.
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