Estimation of material degradation of VVER-1000 baffle
1 Department of Nuclear Reactors, FNSFE, CTU Prague, V Holešovičkách 2, Prague 8, Czech Republic
2 Research Center Rez Ltd., 250 68 Husinec-Rez 130, Czech Republic
* Corresponding author: email@example.com
Published online: 25 September 2017
The planned lifetime of the first commercial VVER-1000 units were designed for 30 to 35 years. Most of the early VVER plants are now reaching and/or passing the 35-year mark. Service life extension for another 10 to 30 years is now under investigation. Life extension requires the evaluation of pressure vessel internals degradation under long-term irradiation. One of the possible limiting factors for the service life of VVERs is a void swelling of the Russian type titanium stabilized stainless 08Ch18N10T steel used to construct the baffle surrounding the core. This article aims to show first steps towards deeper analysis of the baffle degradation process and to demonstrate the possibilities of precise calculation and measurements on the VVER-1000 mock-up in LR-0 reactor.
© The Authors, published by EDP Sciences, 2017
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