The problem of optimizing the water chemistry used in the primary coolant circuit of a nuclear power station equipped with VVER reactors under the conditions of longer fuel cycle campaigns and increased capacity of power units |
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Authors: | R B Sharafutdinov N L Kharitonova |
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Affiliation: | 1.Scientific-Technical Center for Nuclear and Radiation Safety,Moscow,Russia |
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Abstract: | It is shown that the optimal water chemistry of the primary coolant circuit must be substantiated while introducing measures
aimed at increasing the power output in operating power units and for the project called AES-2006/AES TOI (a typical optimized
project of a nuclear power station with enhanced information support). The experience gained from operation of PWR reactors
with an elongated fuel cycle at an increased level of power is analyzed. Conditions under which boron compounds are locally
concentrated on the fuel rod surfaces (the hideout phenomenon) and axial offset anomaly occurs are enlisted, and the influence
of lithium on the hideout in the pores of deposits on the surfaces of fuel assemblies is shown. |
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