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Liviu Popa-Simil

Liviu Popa-Simil

LAAS, USA

Title: Micro-nano-engineered hetero-structures for nuclear applications

Biography

Biography: Liviu Popa-Simil

Abstract

Statement of the Problem: The actual nuclear power decay is due to the fact that the actual technologies are very difficult to further improve to correct the fundamental deficiencies that render the nuclear power, expensive, hard to control, prone to accidents with large consequences, and with a nuclear waste denting legacy, among other issues. Starting since 1980s various R&D actions took place, aiming to bring in harmony the nuclear reactions with the environment hosting them. Based on this ancient philosophy, six families of nuclear materials have been conceived and developed, each dealing with one or more actors inside nuclear power generation realm. Fission products are responsible for the most energy generation and largest damage brought to nuclear fuel, therefore a novel micro-hetero structure have been developed, that self-separates the fission products from the fuel, and reduces to minimum the inflicted fuel damage. The most advanced version of such fuel is generically called “Cer-Liq-Mesh”, made of microbeads of about 20 micron diameter, immersed in a drain liquid, that stops and collects the fission products. A nano-hetero structure have been developed to deal with knock-on electrons resulted from fission product or any other moving particle kinetic energy deposition during stopping by ionization. The structure looks like a supercapacitor, charged by nuclear energy which discharges delivering electricity. Frit like nano-clustered structures are used for enhanced transmutation products separation, while fractal immiscible hetero structures with the property of self-repairing and recovering from radiation damage are developed for structural materials. Nano-structures are also capable of trapping and guiding along radiation as X, gamma and neutrons, being useful for light radiation shielding. Used with embedded NEMS may create microsecond response time criticality control systems. Nano-structures may in some condition produce active quantum environments where a low energy transition may trigger a high energy quantum reaction, opening the way in entanglement and long range quantum state teleportation.