Investigations of boron transport in a PWR core with COBAYA3/SUBCHANFLOW inside the NURESIM platform

Triborate Formation Constants and Polyborate Speciation under Hydrothermal Conditions by Raman Spectroscopy using a Titanium/Sapphire Flow Cell

“…The chemistry of aqueous boron solutions under hydrothermal conditions is of scientific interest due to their complexity relative to other acid–base equilibria and to the important role of borate and polyborate species in geochemistry and industrial chemistry. In the nuclear industry, boron-containing compounds are added to the primary coolant systems of pressurized water reactors (PWRs) in order to control the neutron flux. An ability to understand and model polyborate speciation in high-temperature water chemistry is needed to control the pH and to predict the onset of under- and in-deposit borate precipitation reactions on fuel surfaces that can reduce the reactor’s operating efficiency.…”

Static and transient pin-by-pin simulations of a full PWR core with the extended coupled code system DYNSUB

“…This model has been assessed in detail by Calleja et al (2014). A good performance of the boron transport solver compared to that of the sub-channel code FLICA as well as the one of 1D assembly level thermalhydraulic module FLOCAL has been observed.…”

Boron dilution transient simulation analyses in a PWR with neutronics/thermal-hydraulics coupled codes in the NURISP project

“…These transients have been deeply studied in the past, both from the regulator perspective, see Hagen (1982), Hyvärinen (1993) and Emrit et al (2004) or by several research groups, see Ivanov et al (1999), Gonzalez et al (2007), Freixa et al (2009), Cotton et al (2013), Calleja et al (2014), Jayaraju et al (2013), Ozdemir and Avramova (2014a) and Ozdemir and Avramova (2014b).…”