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A Model of Crud Particle/Wall Interaction and Deposition in a Pressurized Water Reactor Primary System

Kostadin A. Dinov

Nuclear Technology

Volume 94 / Number 3 / June 1991 / Pages 281-285


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The relative importance of the soluble and particle fractions that take part in the transport of pressurized water reactor corrosion product is discussed in terms of modeling research. A model is proposed that considers the dominant role of the colloidal/particle fraction in the primary coolant system mass and radioactivity transfer. A new hypothesis for a two-stage sticking mechanism is used to quantify the thermal and water chemistry effects on particle/wall interaction. Analytical expressions for the deposition and release coefficients are derived. The results obtained by the MIGA computer code using this model are compared with observations.

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