Combined Filter for Purifying a Radioactive Steam-Gas Mixture
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The design of a new fireproof combined filter for purifying a radioactive steam-gas mixture by removing volatile compounds of radioactive iodine during normal operation of NPP as well as during accidental depressurization of fuel rods is described. The filter consists of identical cylindrical sections, each of which possesses a top lid for anchoring spiral filtering elements with variable surface area and a bottom lid with a grid for anchoring sorbents. The first and closing sections along the course of the purified gas flow are filled with sorbent consisting of the inorganic material SiO2–Cu0 or KSKG brand silica gel or a mixture of the two. A granulated sorbent based on SKT-3I brand activated charcoal or Fizkhimin inorganic granulated sorbent based on silica gel is used as a filler in each of the intermediate sections to catch volatile forms of radioactive iodine. The size of the pores in the spiral filtering elements with variable surface area decreases in a direction from the first to the closing section along the course of the purified gas flow; there are at least three sections equipped with sorbent for purifying gases by removing radioactive iodine-containing impurities.
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- 1.L. I. Fedorova, P. Ya. Poltinin, L. V. Karnatsevich, et al., “On the nature of the distribution of the coal dust fraction in the SKT-3 adsorbent of AU-1500-type iodine filters during their long-term operation in NPP ventilation systems,” Vopr. At. Nauki Tekhn. Ser. Fiz. Rad. Povr. Rad. Materialoved., No. 3 (81), 99–100 (2002).Google Scholar
- 2.V. N. Komyshnyi, I. V. Yagodkin, P. N. Martynov, et al., “Combined filtering setups in application to normal operation and decommissioning of nuclear power plants,” in: Abstr. Int. Sci. Appl. Conf. on Aerosols and Safety, Obninsk, Oct. 24–28, 2005, pp. 218–219.Google Scholar
- 3.Design of Off-Gas and Air Cleaning Systems at NPP, IAEA Techn. Rep. Ser. No. 274, IAEA, Vienna (1987).Google Scholar
- 4.O. A. Ustinov, L. P. Sukhanov, S. A. Yakunin, et al., “Emergencies at nuclear power plants, warning methods and cleanup,” Ross. Khim. Zh., 49, No. 4, 54–60 (2005).Google Scholar
- 5.V. N. Kornienko, Creation of Iodine Adsorber Filters for Nuclear Power Plants and Radiochemical Plants: Auth. Abstr. Candid. Dissert. in Techn. Sci., SPNIPKI Atomenergoproekt, St. Petersburg (2005).Google Scholar
- 6.N. A. Konovalova, V. B. Krapukhin, V. V. Kulemin, et al., “Spiral filtering elements as the basis of filtration setups for removal of solid radioactive impurities from gas and liquid phases,” in: Proc. 3rd Int. Conf. on Radiation and Applications in Various Fields on Research, Budva, Montenegro (2015), pp. 21–22.Google Scholar
- 7.S. A. Kulyukhin, I. A. Rumer, L. V. Mizina, et al., “Extraction of volatile compounds of radioactive iodine from steam-air medium,” Radiokhimiya, 59, No. 1, 71–75 (2017).Google Scholar