|
Descripción
|
|
|---|---|
| Previous studies have demonstrated the presence of microorganisms in the spent nuclear fuel pools (SNFPs) of nuclear power plants and that those microorganisms can colonize the stainless steel pools walls forming biofilms. Additionally, it has been observed the ability of these biofilms to retain radionuclides which suggest the possibility of using them for radioactive water decontamination purposes. The aim in the present study was to develop a decontamination system on a pilot scale, in order to assess whether the process could be scalable to an industrial level. For this purpose stainless steel bioreactors were installed in the Cofrentes Nuclear Power Plant (Valencia, Spain) next to the SNFPs to receive water directly from the pools allowing in situ analysis of radiation removal. Stainless steel and titanium balls were introduced into the bioreactors and were removed after different time periods. Biofilms developed on the balls were analyzed by scanning electron microscopy and epifluorescence microscopy. Biofilms ability to retain radionuclides was determined by gamma spectrometry. The main radionuclides retained were Co-60 and Mn-54. A radionuclide retention process mechanism related to biofilms formation-detachment is suggested. It has been assessed that the scalable process developed can be economically profitable. | |
|
Internacional
|
Si |
|
ISSN o ISBN
|
978-84-617-9009-8 |
|
Entidad relacionada
|
Spanish Society for Microbiology (SEM) International Meeting on New Strategies in Bioremediation Processes (BioRemid-2017) |
|
Nacionalidad Entidad
|
ESPAÑA |
|
Lugar del congreso
|
Granada (Spain), March 9-10, 2017 |