Pebble Bed Reactors could allow nuclear plants to support the goal of reducing global climate change in an energy hungry world. They are small, modular, inherently safe, use a demonstrated nuclear technology and can be competitive with fossil fuels. Pebble bed reactors are helium cooled reactors that use small tennis ball size fuel balls consisting of only 9 grams of uranium per pebble to provi...

Transitioning to High Assay Low Enriched Uranium-fueled reactors will alter the material requirements of current nuclear fuel cycle, in terms mass enriched uranium and Separative Work Unit capacity. This work simulates multiple cycle scenarios using Cyclus compare how type advanced reactor deployed energy growth demand affect transition reactors. Fuel considered include fleet Light Water Reacto...

Six advanced reactor concepts have been selected for Generation-IV reactors and are being investigated worldwide to meet the challenging goals of effective resource utilization and waste minimization (sustainability), improved safety, enhanced proliferation resistance, and reduced system cost. [1] The six systems are very high temperature reactor (VHTR), sodium-cooled fast reactor (SFR), superc...

The current generation of nuclear reactors are evolutionary in design, mostly based on the technology originally designed to power submarines, and dominated by light water reactors. The aims of the Generation IV consortium are driven by sustainability, safety and reliability, economics, and proliferation resistance. The aims are extended here to encompass the ultimate and universal vision for s...

The natural convection flow over a surface embedded in saturated porous media is encountered in many engineering problems such as the design of pebble-bed nuclear reactors, ceramic processing, crude oil drilling, geothermal energy conversion, use of fibrous material in the thermal insulation of buildings, catalytic reactors and compact heat exchangers, heat transfer from storage of agricultural...

We study the effect of naval nuclear reactors on the study of neutrino oscillations. We find that the presence of naval reactors at unknown locations and times may limit the accuracy of future very long baseline reactor-based neutrino oscillation experiments. At the same time, we argue that a nuclear powered surface ship such as a large Russian icebreaker may provide an ideal source for precisi...

During World War II and the Cold War, the United States developed a complex of industrial facilities for the research, production, and testing of nuclear weapons. In addition, the United States government supported the development of nuclear energy for commercial applications and conducted research in high-energy physics and other basic sciences, as well as medical diagnostics and treatment. Th...

Commercial nuclear reactors and storage facilities for their spent fuel contain large amounts of radioactive material, and are not designed to resist attack. The US Nuclear Regulatory Commission (NRC) has determined, however, that these facilities require only a light defense. This paper shows, without disclosing any sensitive information, that reactors and spent-fuelstorage facilities have vul...

We discuss the feasibility of using the detection of electron antineutrinos produced in fission to monitor the time dependence of the Plutonium content of nuclear power reactors and large (> 1 MWatt) research reactors. If practical such a scheme would allow worldwide, automated monitoring of reactors and, thereby, the detection of proliferation attempts. Although this idea shows some promise, w...