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REACTOR PHYSICS CHALLENGES IN GEN-IV REACTOR DESIGN
DRISCOLL MICHAEL J.,HEJZLAR PAVEL Korean Nuclear Society 2005 Nuclear Engineering and Technology Vol.37 No.1
An overview of the reactor physics aspects of Generation Four(GEN-IV) advanced reactors is presented, emphasizing how their special requirements for enhanced sustainability, safety and ecoomics motivates consideration of features not thoroughly analyzed in the past. The resulting concept-specific requirements for better data and methods are surveyed, and some approaches and initiatives are suggested to meet the challenges faced by the international reactor physics community. No unresolvable impediments to successful development of any of the six major types of proposed reactors are identified, given appropriate and timely devotion of resources.
Driscoll, T.,Kim, H.-T.,Chae, B.-G.,Kim, B.-J.,Lee, Y.-W.,Jokerst, N. M.,Palit, S.,Smith, D. R.,Di Ventra, M.,Basov, D. N. American Association for the Advancement of Scienc 2009 Science Vol.325 No.5947
<P>The resonant elements that grant metamaterials their distinct properties have the fundamental limitation of restricting their useable frequency bandwidth. The development of frequency-agile metamaterials has helped to alleviate these bandwidth restrictions by allowing real-time tuning of the metamaterial frequency response. We demonstrate electrically controlled persistent frequency tuning of a metamaterial, which allows the lasting modification of its response by using a transient stimulus. This work demonstrates a form of memory capacitance that interfaces metamaterials with a class of devices known collectively as memory devices.</P>
Reactor Physics Challenges in GEN-IV Reactor Design
MICHAEL J. DRISCOLL,PAVEL HEJZLAR 한국원자력학회 2005 Nuclear Engineering and Technology Vol.37 No.1
An overview of the reactor physics aspects of Generation Four(GEN-IV) advanced reactors is presented, emphasizing how their special requirements for enhanced sustainability, safety and ecoomics motivates consideration of features not thoroughly analyzed in the past. The resulting concept-specific requirements for better data and methods are surveyed, and some approaches and initiatives are suggested to meet the challenges faced by the international reactor physics community. No unresolvable impediments to successful development of any of the six major types of proposed reactors are identified, given appropriate and timely devotion of resources.
ASSESSMENT OF GAS COOLED FAST REACTOR WITH INDIRECT SUPERCRITICAL $CO_2$ CYCLE
Hejzlar, P.,Dostal, V.,Driscoll, M.J.,Dumaz, P.,Poullennec, G.,Alpy, N. Korean Nuclear Society 2006 Nuclear Engineering and Technology Vol.38 No.2
Various indirect power cycle options for a helium cooled gas cooled fast reactor (GFR) with particular focus on a supercritical $CO_2(SCO_2)$ indirect cycle are investigated as an alternative to a helium cooled direct cycle GFR. The balance of plant (BOP) options include helium-nitrogen Brayton cycle, supercritical water Rankine cycle, and $SCO_2$ recompression Brayton power cycle in three versions: (1) basic design with turbine inlet temperature of $550^{\circ}C$, (2) advanced design with turbine inlet temperature of $650^{\circ}C$ and (3) advanced design with the same turbine inlet temperature and reduced compressor inlet temperature. The indirect $SCO_2$ recompression cycle is found attractive since in addition to easier BOP maintenance it allows significant reduction of core outlet temperature, making design of the primary system easier while achieving very attractive efficiencies comparable to or slightly lower than, the efficiency of the reference GFR direct cycle design. In addition, the indirect cycle arrangement allows significant reduction of the GFR &proximate-containment& and the BOP for the $SCO_2$ cycle is very compact. Both these factors will lead to reduced capital cost.