نتایج جستجو برای: parcs
تعداد نتایج: 244 فیلتر نتایج به سال:
La société en quête de bien-être incite les concitoyens à investir espaces nature pour s’adonner des pratiques loisirs bénéfiques la santé. Cette mouvance territoires naturellement dotés d’espaces se tourner vers cette nouvelle manne touristique tout préservant leur environnement dans un objectif développement durable. Le désengagement progressif l’État depuis décentralisation contraint partena...
A new OECD/NEA benchmark entitled “Reactivity compensation with diluted boron by stepwise insertion of control rod cluster” is starting. This benchmark, based on high quality measurements performed at the NPP Rostov Unit 2, aims to validate and assess fidelity multi-physics simulation code capabilities. The Benchmark divided in two phases: assembly wise pin-by-pin resolution steady-state transi...
This is a review of those experiments in the area of Fundamental Physics that are either approved by ESA and NASA, or are currently under development, which are to be performed in the microgravity environment of the International Space Station. These experiments cover the physics of liquid Helium (SUE, BEST, MISTE, DYNAMX, and EXACT), ultrastable atomic clocks (PHARAO, PARCS, RACE), ultrastable...
This work addresses applications of the classical harmony search (HS), improved harmony search (IHS) and the harmony search with differential mutation based pith adjustment (HSDM) to PWR core reloading pattern optimization problems. Proper loading pattern of fuel assemblies (FAs) depends on both neutronic and thermal–hydraulic aspects; obtaining optimal arrangement of fuel assemblies, FA, in a ...
POSIX Threads and OpenMP were used to implement parallelism in the nuclear reactor transient analysis code PARCS on multiprocessor SUN and SGI workstations. The achievable parallel performance for practical applications is compared for each of the code modules using POSIX threads and OpenMP. A detailed analysis of the cache misses was performed on the SGI to explain the observed performance. Co...
U.S. Government work not protected by U.S. copyright Abstract – In this paper we describe key aspects of the conceptual design of the microwave interrogation structure in the laser-cooled cesium frequency standard that is part of the Primary Atomic Reference Clock in Space (PARCS) experiment. The PARCS standard uses balls of cold atoms launched in a pulsed beam configuration. The microwave inte...
After presenting a very brief outline of this flight program, this paper will dwell in more detail on the key challenges that must be met for successful flight. These include the comparison of the frequency of the PARCS cesium clock with Earth-bound cesium clocks using the GPS carrier-phase method, the implementation of the phase modulation scheme needed to minimize the impact of space-station ...
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