Study of nitric acid leachout characteristics from weak base anion exchanger to maintain a specified pH regime during Gd(NO3)3 removal from moderator system of 540 MWe PHWRs |
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| Authors: | V. S. Tripathi V. Balaji G. Venkateswaran S. C. Dash |
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| Affiliation: | 1. Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Tarapur Atomic Power Station Units 3&4, P.O. TAPP, Thane, India |
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| Abstract: | Nitric acid leachout characteristics from weak base anion exchanger (WBA) have been experimentally evaluated as a function of total nitric acid loading at a given flow velocity. An empirical first order model is used to explain the column outlet behaviour. Based on the experimental evaluation, a column configuration of a strong acid cation exchanger (SAC) topped mixed bed of SAC and WBA followed by a 5% nitric acid loaded WBA as the bottom layer of the column has been used to remove Gd(NO3)3 from water while maintaining the column outlet pH in the range of 5.0–5.5. |
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| Keywords: | gadolinium anion exchanger leachout flow velocity pH |
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