The physical process of increasing the concentration of the uranium-235 isotope relative to the predominant uranium-238 isotope in natural uranium. For PWR fuel the proportion of uranium-235 is typically increased from 0.7% to between 3% and 5%. Current technologies are the gas centrifuge process and the gas diffusion process, both of which use uranium hexafluoride as their feedstock.
process used to increase the concentration of a certain isotope in an element. In the case of uranium, various means are employed (gaseous diffusion, ultracentrifugation, selective laser excitation) to increase the concentration of the 235-isotope with respect to the 238-isotope that predominates in naturally occurring uranium
pragmatic inferential processes of completing or expanding the linguistically decoded logical form of an utterance in order to recover the propositional expressed and the explicatures of the utterance.
A physical or chemical process for increasing the proportion of a particular isotope. Uranium enrichment involves increasing the proportion of 235U from its level in natural uranium, 0.711%. For nuclear power reactor fuel the proportion of 235U is typically 3-5%.
A physical or chemical process for increasing the proportion of a particular isotope. Uranium enrichment involves increasing the proportion of U-235 from its level in natural uranium, 0.711%: for LEU fuel the proportion of U-235 (the enrichment level) is typically increased to between 3% and 5%.
the addition of nutrients, such as nitrogen, phosphorus, or carbon compounds, into a lake or waterway to the point that the trophic state is greatly increased because of the stimulation of the growth of algae and other aquatic plants.
The addition of nutrients (e.g., nitrogen, phosphorus, carbon compounds) from sewage effluent, agricultural or urban runoff, or other sources to surface water. Enrichment greatly increases the growth potential for algae and other aquatic plants.
Addition of nitrogen, phosphorous and carbon compounds or other nutrients into a water body, thereby increasing the potential for growth of algae and other aquatic plants. Most frequently, enrichment results from the inflow of sewage effluents or from agricultural run-off.
Experiences and activities scheduled that are above and beyond the basic curriculum offered in the classroom or the school. The emphasis is on breadth of knowledge as opposed to worrying about speed or level.
Any activity which the teacher designs or uses that offers learning challenges to students which go beyond the basic curriculum£®This kind of activity is appropriate for students with advanced English skills or students with average English skills who are highly motivated£®Also called Extension Activities
As required by the U.S. Department of Agriculture, long grain white rice is enriched with vitamins and minerals as listed on the individual package. For more details about a specific rice product, please refer to the Products tab above.