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ULOF Accident Analysis for 300 MWt Pb-Bi Coolled MOX Fuelled SPINNOR Reactor

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Author(s): Ade Gafar Abdullah | Zaki Su’ud | Rizal Kurniadi | Neny Kurniasih

Journal: Applied Physics Research
ISSN 1916-9639

Volume: 4;
Issue: 1;
Date: 2012;
Original page

ABSTRACT
In This study the result of investigation through simulation of unprotected loss of flow accident (ULOF) for 300 MWth MOX fuelled small Pb-Bi Cooled non-refuelling nuclear reactors (SPINNOR) are discussed. The two dimensional diffusion calculation combined with transient thermal hydraulic analysis has been employed. The reactor is tank type Pb-Bi cooled fast reactors with steam generator included inside reactor vessel. The simulation begin with steady state calculation of neutron flux, power distribution and temperature distribution across the core, hot and cool pool, and also steam generator. The accident analysis begin with the loss of pumping power. The sequence of analysis is then the transient flow calculation across the core, the core temperature distribution, hot pool and cool pool fluid dynamic calculation and temperature change simulation, and the transient flow and temperature calculation across the steam generator. Then the reactivity feedback calculation is conducted, followed by kinetic calculation, and then the sequence repeated. The results show that the SPINNOR reactor has inherent safety capability against this accident.
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