A deep borehole repository is one of the four geologic disposal system options currently under study by the U.S. DOE to support the development of a long-term strategy for geologic disposal of commercial used nuclear fuel (UNF) and high-level radioactive waste (HLW). The immediate goal of the generic deep borehole repository study is to develop the necessary modeling tools to evaluate and impro...

Natural and artificial barrier systems are the key elements of a final repository site for hazardous waste in geological formations. The concept is to isolate the waste from the biosphere over a long period of time. During that period, groundwater is prohibited to access the waste since contaminated water may endanger people and environment. Hence, permanent monitoring is important to avoid ris...

Portioning and Transmutation is the separation and fissioning of the minor actinides and some long-lived fission product from the spent nuclear fuel. In this review, the impact of partitioning and transmutation of nuclear waste based on radiotoxicity, geological repository, proliferation concern and the technological requirement to be fully implemented has been discussed. A summary of the advan...

The dilution of aqueous neptunium carbonate complexes induces the intrinsic formation of nanocrystalline neptunium dioxide (NpO2) particles, which are characterised by UV/Vis and X-ray absorption spectroscopies and transmission electron microscopy. This new route of nanocrystalline NpO2 formation could be a potential scenario for the environmental transport of radionuclides from the waste repos...

The digital twin is considered the central component of modern industry. It has been adopted in many industrial fields. However, its application nuclear engineering very rare, especially for radioactive waste deposits which an urgent and tricky issue. Motivated by this demand considering China's research & development guidelines geological disposal high-level (a three-step strategy 2050 to ...