Radiation-chemical removal of corrosion hydrogen from VVER first-loop coolant

• Published in: Atomic energy (New York, N.Y.) N.Y.), 2008-12, Vol.105 (6), p.402-407
• Main Authors: Luzakov, A. V., Bulanov, A. V., Verkhovskaya, A. O., Kolesov, B. I., Shovikov, G. P., Kabakchi, S. A.
• Format: Article
• Language: English
• Subjects: Ammonia; Corrosion; Decomposition; Experiments; Hadrons; Heavy Ions; Hydrogen peroxide; Nitrates; Nitrogen; Nuclear Chemistry; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Radiation; Studies; Water
• ISSN: 1063-4258; 1573-8205
• DOI: 10.1007/s10512-009-9115-4

Room-temperature γ radiolysis of water solutions of ammonia in the presence of hydrogen peroxide is studied. It is found that in de-aerated solutions the yield of hydrogen peroxide decomposition is 3.8–5.5 mol/100 eV depending on its initial concentration. In the absence of hydrogen peroxide, the yield of the decomposition of ammonia is 0.34–0.39 particles/100 eV; adding hydrogen peroxide to the solution increases the rate of decomposition of ammonia and saturation of the solution with hydrogen decreases it. The data obtained are used for mathematical simulation of the influence of hydrogen peroxide on the composition of the first-loop coolant of a hypothetical ship reactor facility with VVER where equipment corrodes with hydrogen being formed. It is shown that adding hydrogen peroxide to the coolant in molar concentration equal to that of corrosion hydrogen decreases the stationary concentration of hydrogen and ammonia to the level characteristic for the case where there is no equipment corrosion with hydrogen being formed in the loop.