Authors & Affiliations
Niyazov S.-A.S., Ivanov K.D., Lavrova O.V.
A.I. Leypunsky Institute for Physics and Power, Obninsk, Russia
The rationale for performance, resource and dimensions of the device technology of the coolant includes numerical evaluation of the interaction of fluid with structural materials of the first circuit. This interaction determines, on the one hand, local and integral oxygen consumption, an important justification for devices the introduction of oxygen in the coolant, and on the other hand, the flow of metallic impurities in the coolant. It is known that the excessive accumulation of metallic impurities, which under normal conditions are mainly in the oxidized state, can lead to the formation on heat transfer surfaces of various sediments, leading to the deterioration of their functional characteristics. The paper considers the process of interaction have become dissolved in the coolant oxygen balance of streams of metallic impurities and oxygen with the formation of the corresponding solid-phase products in the area of their meetings. As conditions of development of the oxidation process as well as the concentration of oxygen in an implicit form are present and other parameters, namely, temperature, rod steel and hydrodynamic flow condithttp://vant.ippe.ru/administrator/index.php?option=com_content&view=article&layout=edit&id=856#ions in the vicinity of the surface of the coolant, which in the course of the experiment remained constant. In General these parameters in one form or another must be included in the criterion steel passivation. Given the average flux of metallic impurities in the coolant in the course of corrosion in lead-bismuth coolant for a set of iron-chromium steels. The estimations show that with high thermodynamic activity of oxygen a ~ 1 oxidative capabilities of the coolant over temperature remain high. In practice this turns out to be sufficient for the formation of oxide films on steel surfaces which are not subjected to the corrosive effect of the coolant.
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