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Analysis of strategies for improving uranium utilization in pressurized water reactors

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Show simple item record Sefcik, Joseph A. en_US Driscoll, Michael J. en_US Lanning, David D. en_US
dc.contributor.other United States. Dept. of Energy. Division of Energy Technology. en_US 2011-01-11T05:28:57Z 2011-01-11T05:28:57Z 1981 en_US
dc.description.abstract Systematic procedures have been devised and applied to evaluate core design and fuel management strategies for improving uranium utilization in Pressurized Water Reactors operated on a once-through fuel cycle. A principal objective has been the evaluation of suggested improvements on a self-consistent basis, allowing for concurrent changes in dependent variables such as core leakage and batch power histories, which might otherwise obscure the sometimes subtle effects of interest. Two levels of evaluation have been devised: a simple but accurate analytic model based on the observed linear variations in assembly reactivity as a function of burnup; and a numerical approach, embodied in a computer program, which relaxes this assumption and combines it with empirical prescriptions for assembly (or batch) power as a function of reactivity, and core leakage as a function of peripheral assembly power. State-of-the-art physics methods, such as PDQ-7, were used to verify and supplement these techniques. en_US
dc.description.abstract These methods have been applied to evaluate several suggested improvements: (1) axial blankets of low-enriched or depleted uranium, and of beryllium metal, (2) radial natural uranium blankets, (3) lowleakage radial fuel management, (4) high burnup fuels, (5) optimized H/U atom ratio, (6) annular fuel, and (7) mechanical spectral shift (i.e. variable fuel-to-moderator ratio) concepts such as those involving pin pulling and bundle reconstitution. en_US
dc.description.abstract The potential savings in uranium requirements compared to current practice were found to be as follows: (1) O0-3%, (2) negative, (3) 2-3%; possibly 5%, (4) "15%, (5) 0-2.5%, (6) no inherent advantage, (7) 10%. Total savings should not be assumed to be additive; and thermal/hydraulic or mechanical design restrictions may preclude full realization of some of the potential improvements. en_US
dc.format.extent 241 p en_US
dc.publisher Cambridge, Mass. : Massachusetts Institute of Technology, Energy Laboratory, 1981 en_US
dc.relation.ispartofseries Energy Laboratory report (Massachusetts Institute of Technology. Energy Laboratory) no. MIT-EL 80-032. en_US
dc.relation.ispartofseries MITNE ; no. 234. en_US
dc.subject Pressurized water reactors. en_US
dc.subject Uranium. en_US
dc.subject Nuclear fuels. en_US
dc.subject Nuclear fuel elements. en_US
dc.title Analysis of strategies for improving uranium utilization in pressurized water reactors en_US
dc.identifier.oclc 09531588 en_US

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