Semi-static dissolution tests using pressurized water reactor spent fuel rod segments and NNWSI reference J-13 well water 1n sealed stainless steel vessels at 85*C are being conducted In support of the Waste Package Task of the NNWSI Project. Test specimens include: bare fuel plus the empty cladding hulls, fuel rod segments with artificially induced cladding defects and water-tight end caps, an...

The paper presents an application of a variance decomposition method for the sensitivity analysis of the thermal hydraulic (TH) model of the Passive Containment Cooling System (PCCS) of an Advanced Pressurized Reactor (AP1000). The Loss Of Coolant Accident (LOCA) is considered as the most representative accident for identifying the Failure Damage Domain (FDD) of the PCCS with respect to the ind...

Fusion reactors are expected to be safer, more environmentally friendly, and have a lower nuclear proliferation risk, compared with other energy systems. However, it is widely recognized that large amount of radioactive materials will produced by fusion reactor. Therefore, important fully understand the overall radiation risk level wastes (radwaste) existing Studies on treatment radwaste been c...

One of the possible consequences a severe accident at nuclear power plant with pressurized water reactor is steam explosion that occurs as result interaction high-temperature melt core materials and can lead to failure containment. The paper considers initial stage (premixing water) under stratified geometry. key phenomenon leading premixing dynamic effect collapsing vapor bubble in liquid on s...

Previous work done on reactor kinetics and control in load-following operation modes available open literature is reviewed. The analysis focused on, however not limited to pressurized water reactors. Different approximations of the time-dependent neutron transport problem as well different algorithms are described detail compared. Due lack published information majority comparisons was qualitat...