The EU-DEMO Water-Cooled Lithium-Lead (WCLL) Breeding Blanket (BB) main subsystems to be cooled are the Breeder Zone (BZ) and First Wall (FW). Each subsystem will equipped with an independent Primary Heat Transfer System (PHTS). Within framework of EUROfusion Work Package research program, several accidents belonging category “Decrease in Coolant Flow Rate” were studied. activity was aimed at e...

After the Fukushima Daiichi Accident, safety features such as accident tolerant fuel (ATF) and diverse flexible coping strategies (FLEX) for existing nuclear fleets are being investigated by US Department of Energy under Light Water Reactor Sustainability Program. This research is conducted to quantify risk-benefit these features. Dynamic probabilistic risk assessment (DPRA)-based response-surf...

The Slovenian Krško Nuclear Power Plant (NEK) model was built in using APROS - Advanced PROcess Simulation environment. basis for the this RELAP5/MOD3.3 Engineering Handbook, updated to 26th cycle and also includes upflow conversion modification. A detailed nodalisation created each system every separately validated. current covers primary circuit with core kinetics model, secondary their contr...

Thermal hydraulic system codes are complex tools developed to estimate the transient behaviour of nuclear power plants (NPPs) during off-normal conditions. The evaluation of safety margins, the operator training, the optimization of the plant design and related emergency procedures are some of the major applications of these codes. Best estimate computer codes are used to calculate postulated a...

In the frame of activities promoted and encouraged by EUROfusion Consortium aimed at developing EU-DEMO fusion reactor, great emphasis has been placed a very early stage design to incorporate provisions needed improve overall plant safety reliability performances as well analyse possible mitigation actions. this framework, research activity focused on representative relevant cooling loop Helium...