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Conference Article: Modelling of iodine chemistry and plate-out in a CAGR

Clough, P.N.; Hood, E.M. (Safety and Reliability Directorate, UKAEA, Culcheth (United Kingdom))

Abstract

Important new evidence on the chemistry and plate-out behaviour of iodine in Commercial Advanced Gas-Cooled Reactors has recently become available from methyl iodide injection experiments at Hinkley Point B Power Station. A suite of computer codes, AGRIPA-2, is described which is designed to model the processes of iodine species interconversion and plate-out in CAGRS. This suite has been applied to model the Hinkley Point B injection experiments, and the results presented here show a very satisfactory fit of the predictions to the experimental data. In particular, the time-dependent concentrations of iodine at sampling points distributed around the circuit are well reproduced without any arbitrary fitting of input parameters.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Specialists' meeting on fission product release and transport in gas-cooled reactors Berkeley (United Kingdom) 22-25 Oct 1985
International Atomic Energy Agency, International Working Group on Gas-Cooled Reactors, Vienna (Austria)
IWGGCR--13, pp:318-328