Simulation of the behavior of activated products of corrosion during RBMK-1000 startup after scheduled major overhaul

A simple model is proposed for calculating the activation of corrosion products during startup and under normal operation conditions of a reactor. The model parameters, such as the rate of removal of radionuclides from the loop and the wash-off and deposition constants of radionuclides in the reacto...

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Bibliographic Details
Published in:Atomic energy (New York, N.Y.) N.Y.), 2001-05, Vol.90 (5), p.382-389
Main Authors: KRITSKII, V. G, RODIONOV, Yu. A, STYAZHKIN, P. S, KHASANOVA, G. B, EPIKHIN, A. I, KOVALEV, S. M, KOZLOV, E. P
Format: Article
Language:English
Subjects:
Activated
Circulation
Constants
Corrosion
Corrosion products
Deposition
Mathematical models
Purification
Radioisotopes
Reactors
Solubility
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Summary:A simple model is proposed for calculating the activation of corrosion products during startup and under normal operation conditions of a reactor. The model parameters, such as the rate of removal of radionuclides from the loop and the wash-off and deposition constants of radionuclides in the reactor core, are determined for certain radionuclides. It is shown that the removal rate of activated corrosion products is 3-10 times higher than previously assumed, and is (2.4-6)·10^sup -4^ sec^sup -1^ for ^sup 51^Cr and (7.5-10)·10^sup -4^ sec^sup -1^ for ^sup 60^Co. The removal of ^sup 51^Cr from a forced multiple circulation loop as a result of the higher solubility of this radionuclide is determined primarily by bypass purification, and the removal of ^sup 60^Co is determined primarily by removal with steam and subsequent purification of the condensate. The model calculations agree satisfactorily with observations.[PUBLICATION ABSTRACT]
ISSN:1063-4258
1573-8205
DOI:10.1023/A:1011372408447