[1M04-07] Water chemistry and Corrosion for LWR

10:55 AM - 11:10 AM JST(1:55 AM - 2:10 AM UTC)

[1M04] Evaluation of KOH as a pH control agent of PWR primary system(1) Study of pH control method for K-Li environment by column adsorption test on ion exchange resin

*Genki MURAKAMI¹, Yusuke NAKANO², Wataru SUGINO², Yosuke MUKAI¹, Yuichi SHIMIZU¹, Nobuo ISHIHARA¹ (1. Mitsubishi Heavy Industries, Ltd., 2. The Japan Atomic Power Company)

Keywords:

PWR,water chemistry,KOH,LiOH,pH control,ion exchange resin,column adsorption test

LiOH enriched in ⁷Li isotope is added to primary cooling water of PWR. Due to the limited number of countries producing isotopically enriched LiOH and the high cost of procurement, KOH is studied as a potential alternative to enriched LiOH. If KOH is used in PWRs, cations in primary system will consist of K and Li (produced from neutron-irradiated B). In this study, we aim to estimate Li concentration under the current condition of cation exchange resin. For the evaluation of selection coefficients of Li and K, column adsorption tests were conducted. Change of the Li concentration was calculated using the experimental selection coefficients.