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Low-Pressure Nanofiltration Systems for Decreasing Boric Acid Ingress Into Drain Water in NPP with VVER

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Aspects of membrane separation of borated water streams containing LiCl, NaCl, KCl, CsCl salts at concentrations 2–50 mmol/dm3 were investigated for the purpose of preventing boric acid ingress into drain water, decreasing the amount of radwaste produced, and making ion-exchange filter media more efficient. A Vontron VNF2 (CPR) nanofiltration element was the object of investigation. It was shown that changing the concentration of boric acid in the initial solution does not significantly affect the membrane separation of alkali-metal and ammonium salts, while increasing their concentration decreases the salt-retention of the membrane. The retention of boric acid remains constant both for its individual solutions and in the presence of chloride salts of alkali metals and ammonium. The permeability was calculated and the dimensions of the nanofiltration element as part of a local installation were determined.

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Authors and Affiliations

  1. St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia

    V. A. Vinnitskii, G. I. Solonovich & A. S. Chugunov

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  1. V. A. Vinnitskii
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  2. G. I. Solonovich
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  3. A. S. Chugunov
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Correspondence to V. A. Vinnitskii.

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Translated from Atomnaya Énergiya, Vol. 132, No. 3, pp. 158–162, March, 2022.

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Vinnitskii, V.A., Solonovich, G.I. & Chugunov, A.S. Low-Pressure Nanofiltration Systems for Decreasing Boric Acid Ingress Into Drain Water in NPP with VVER. At Energy 132, 163–167 (2022). https://doi.org/10.1007/s10512-023-00920-9

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  • DOI: https://doi.org/10.1007/s10512-023-00920-9

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