New containment multivolume model of NPP Krsko for GOTHIC code is developed. It based on plant drawings and other available data. supported by developed SketchUp 3D model. The subdivided in volumes following physical boundaries clearly defined flow paths. All important concrete heat structures are taken into account. Metal plant’s SAR Chapter 6 licensing RCFC (Reactor Containment Fan Cooler) un...

The performance of Cr-coated Optimized ZIRLO™ as accident tolerant fuel cladding material for pressurized water reactors (PWRs) is assessed. coating oxidation mechanisms, oxide stability, and the transformation Cr-coating/Optimized interface are among studied phenomena. For this purpose, samples were exposed at 1200°C in steam 3 min, 20 min 40 min. As-fabricated coated claddings, plus specimens...

Post-Loss of Coolant Accident (LOCA) ductility assessments Cr-coated Zircaloy cladding was conducted in compliance with the United States Nuclear Regulatory Commission (U.S.NRC)’s guidelines. The Equivalent Cladding Reacted (ECR) limit for oxidized on both sides, representing embrittlement process an outer-side coated near burst hole followed by ballooning, is found to be 13.8% at steam oxidati...