Abstract The US Department of Energy is working with fuel vendors to develop accident tolerant fuels (ATF) for the current fleet light water reactors (LWRs). ATF should be more resilient loss coolant scenarios and help extending life operating LWRs. One proposed concepts use iron-chromium-aluminum (FeCrAl) alloys cladding fuel. A concern in using ferritic FeCrAl that this type may result an inc...

Nuclear power production is a safety-critical process where ultimate decisions lie with the operators. During postulated incidents and accidents, operators rely on emergency operational procedures (EOPs), which are the most used decision support tool. In this research we present a method to develop a computerized tool, based on the ACT-R cognitive architecture, to evaluate the logical task flow...

The temperature of zirconium alloy cladding on the postulated spent nuclear fuel pool complete loss coolant accident is abruptly increased at a certain time and almost fully oxidized to weak ZrO2 in air. This abrupt escalation phenomenon induced by air-oxidation breakaway called fire. Although an kinetic model correlated between has been implemented MELCOR code, it likely bring about unexpected...

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...

We performed a hydrogen combustion analysis in the Advanced Power Reactor 1400 MWe (APR1400) containment during severe accident initiated by small break loss of coolant (SBLOCA) which occurred at lower part cold leg using multi-dimensional system (MHAS) to confirm integrity APR1400 containment. The MHAS was developed combining MAAP, GASFLOW, and COM3D simulate release, distribution nuclear powe...

Nuclear fuel claddings can balloon and rupture at high temperatures under internal gas pressure in case of design basis accidents like loss-of-coolant-accident (LOCA). The thermal phenomena surrounding the ballooning cracking was investigated a series experiments performed using zirconium alloy cladding tubes Centre for Energy Research Hungary. were recorded high-speed infrared camera intermedi...