Impact of Ag and NOx compounds on the transport of ruthenium in the primary circuit of nuclear power plant in a severe accident
Journal article, 2017
Ruthenium is a semi-volatile element originating as a fission product in nuclear reactors that can be released in case of a severe nuclear accident. In this work, the impact of atmosphere composition on the transport of ruthenium through the primary circuit was examined. The effects of silver nanoparticles representing aerosols and NO2 gas as a product of air radiolysis were studied. Quantification of ruthenium transported both as gas and aerosol was performed. Chemical composition of ruthenium species was evaluated. The transport of gaseous ruthenium through the facility increased significantly when NO2 gas was fed into the atmosphere. When both silver aerosols and NO2 were fed into the atmosphere, the transport of ruthenium in gaseous and aerosol forms was promoted. It was concluded that the composition of atmosphere in the primary circuit will have a notable effect on the speciation of ruthenium transported into the containment building during a severe accident and thus on the potential radioactive release to the environment.
1973
oxides
Severe accident
Ruthenium
Air ingress
fission-product release
v27
p2623
hon g
behavior
Air radiolysis
air
acta chemica scandinavica
esca
surfaces
deposition
chemistry
water
Nuclear power plant
Nuclear Science & Technology
reactor
Author
Ivan Kajan
Chalmers, Chemistry and Chemical Engineering, Energy and Material
T. Karkela
Technical Research Centre of Finland (VTT)
U. Tapper
Technical Research Centre of Finland (VTT)
L. S. Johansson
Aalto University
M. Gouello
Technical Research Centre of Finland (VTT)
Henrik Ramebäck
Chalmers, Chemistry and Chemical Engineering, Energy and Material
S. Holmgren
Swedish Defence Research Agency (FOI)
A. Auvinen
Technical Research Centre of Finland (VTT)
Christian Ekberg
Industrial Materials Recycling
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Annals of Nuclear Energy
0306-4549 (ISSN) 1873-2100 (eISSN)
Vol. 100 9-19Subject Categories
Chemical Engineering
DOI
10.1016/j.anucene.2016.10.008