Ruthenium behavior in the reactor cooling system in case of a PWR severe accident: study of oxidative conditions with stainless steel tube

In the research field on severe accidents in nuclear power plant, a specific scenario correspond to accident with oxidative conditions for which damaged fuel can be highly oxidised with significant releases of ruthenium oxides. Ruthenium chemistry is complex, and the current knowledge has to be deep...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2024-01, Vol.333 (1), p.235-251
Main Authors: Ohnet, Marie-Noelle, Leroy, Olivia, Cantrel, Laurent, Kärkelä, Teemu
Format: Article
Language:English
Subjects:
Accidents
Carrier gases
Chemical Sciences
Chemistry
Chemistry and Materials Science
Cooling systems
Diagnostic Radiology
Gas composition
Gas mixtures
Hadrons
Heavy Ions
Inorganic Chemistry
Low temperature
Nuclear Chemistry
Nuclear Physics
Nuclear power plants
Oxygen content
Physical Chemistry
Pressurized water reactors
Ruthenium oxide
Stainless steels
Steel tubes
Temperature gradients
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Summary:In the research field on severe accidents in nuclear power plant, a specific scenario correspond to accident with oxidative conditions for which damaged fuel can be highly oxidised with significant releases of ruthenium oxides. Ruthenium chemistry is complex, and the current knowledge has to be deepened to better assess ruthenium source term with potential radioactive releases to the environment as volatile ruthenium tetroxide. In this work, experimental studies are focused on ruthenium behaviour along a stainless-steel thermal gradient tube, with maximum temperature of 1200 °C, simulating the reactor cooling system in oxidizing conditions with mainly steam/air gas mixtures. Results showed that few % of ruthenium oxides (
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-023-09230-7