Study of Compact Fast Reactor Core Designs
| Autor: | Tehsin Hamid, K. O. Ott |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Materials science
Maximum power principle 010308 nuclear & particles physics Nuclear engineering Control rod 0211 other engineering and technologies 02 engineering and technology Nuclear reactor 01 natural sciences law.invention Core (optical fiber) Safeguard Nuclear Energy and Engineering Conceptual design Nuclear reactor core law 0103 physical sciences 021108 energy Burnup |
| Zdroj: | Nuclear Science and Engineering. 113:109-121 |
| ISSN: | 1943-748X 0029-5639 |
| DOI: | 10.13182/nse93-a24001 |
| Popis: | A study is conducted to investigate conceptual liquid-metal reactor (LMR) core concepts, employing some unconventional design features for improved economics and safety. The unconventional design elements are used to supplement the conventional measures, which alone have apparently not led to an attractive LMR design for the 21st century. Better economics are obtained through simplicity and compactness of the core design. For simplicity, internal scattered blankets are omitted. Core compactness is achieved by maximum power flattening, resulting from axial and radial enrichment zones along with axial and radial (BeO) reflectors. To further enhance core compactness, the in-core compactness, the in-core control rods are replaced by reflector controls. For improved safety, the general objective is to reduce both coolant-void and burnup reactivities. However, even with the use of a wide spectrum of unconventional design features, such as burnable poisons, peripheral reflectors, and inner moderating regions, it is not possible to overcome the fact that both coolant-void and burnup reactivities cannot be reduced simultaneously to desirably low levels. The only resolution of this dilemma appears to be minimize coolant-void reactivity and to manage the burnup reactivities. However, even with the use of a wide spectrum of unconventional design features, such as burnable poisons,more » peripheral reflectors, and inner moderating regions, it is not possible to overcome the fact that both coolant-void and burnup reactivities cannot be reduced simultaneously to desirably low levels. The only resolution of this dilemma appears to be to minimize coolant-void reactivity and to manage the burnup reactivity losses, such that an accidental insertion of significant amounts of reactivity is mechanically not possible. A conceptual design with these characteristics is described.« less |
| Databáze: | OpenAIRE |
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