TITLE:
Granular Sorbents for Passive Environment Protection System during Severe Accidents with Total Loss of Power Supply at NPPs
AUTHORS:
Alexey A. Bessonov, Sergey A. Kulyukhin, Natalya A. Konovalova, Lubov V. Mizina, Igor A. Rumer
KEYWORDS:
Nuclear Power Plant, Sorbent, Radioactive Iodine
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.3 No.4,
April
13,
2015
ABSTRACT: Institute of Physical Chemistry and
Electrochemistry, Russian Academy of Sciences has developed some novel sorbents
designed for the filter units of the passive filtration system for radioactive
discharge from the intercontainment space during heavy accidents with a
complete loss of electricity supply at nuclear power plants. These are
granulated sorbents based on large-pore silica gel containing nanometric
particles of Ag or Ag-Ni compounds (trademark Fizkhimin). The sorbents allow to
remove various radioactive iodine species (inorganic ones and methyl iodide)
from a steam-gas phase with at least 104 decontamination factor. The high
sorption properties of Fizkhimin sorbent with Ag particles were confirmed
during tests at a test facility of the TUV Sudwest company (Karlsruhe,
Germany). This passive filtration system is installed at the 1st and 2nd units
of the Kudankulam nuclear power plant (India) and it is unique in the world
practice.