The viscosities of dilute solutions of H2O-B(OH)3-LiOH with compositions typical of the coolant of light water power reactors have been measured for three boron compositions between 1500 ppm (by weight) and 3500 ppm and three lithium concentrations between 10 ppm (by weight) and 40 ppm over a temperature range from 30°C to 60°C using a calibrated Cannon-Ubbelohde viscometer. The viscosities of these dilute solutions were shown to follow an Arrhenius equation of the form
where υc is the kinematic viscosity (m2/s) of a solution of composition cb ppm Li of the strong base LiOH·H2O and ca ppm B of the weak orthoboric acid H3BO3 [or B(OH)3], and T is the absolute temperature in Kelvins. The four factors A, B, k1, and k2 and an estimate of their standard errors were obtained by a multiple regression using linear algebra techniques and are given by
The constants k1 and k2 are given for the Li and B atom concentrations in ppm (by weight), respectively. These results are consistent with theories for the concentration dependence of dilute solutions of weak and strong electrolytes, respectively.
Subject
Acids, Water, Materials, Composition, Viscosity, Glass, Reactors, Tubes, Coolants, Acidity, Constants, Fluids, Electrolytes
Keywords:
kinematic viscosity, dilute weak electrolyte solutions, lithium hydroxide monohydrate, dilute strong electrolyte solutions, boric acid, Reynolds number, high turbulence fluid flow, nuclear reactor coolant
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2017
Association for Materials Protection and Performance (AMPP)
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