Shutdown margin for high conversion BWRs operating in Th-233U fuel cycle
| Autor: | Ezra Elias, Y. Shaposhnik, Eugene Shwageraus |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Nuclear and High Energy Physics
Engineering drawing Engineering Physics - Instrumentation and Detectors Nuclear Theory Fissile material Fuel cycle business.industry Mechanical Engineering Control rod Shutdown Nuclear engineering FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Blanket Rod Nuclear Theory (nucl-th) Power rating Nuclear Energy and Engineering General Materials Science Safety Risk Reliability and Quality business Waste Management and Disposal Leakage (electronics) |
| Zdroj: | Nuclear Engineering and Design. 276:162-177 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2014.05.030 |
| Popis: | Several reactivity control system design options are explored in order to satisfy shutdown margin (SDM) requirements in a high conversion BWRs operating in Th-233U fuel cycle (Th-RBWR). The studied has an axially heterogeneous fuel assembly structure with a single fissile zone sandwiched between two fertile blanket zones. The utilization of an originally suggested RBWR Y-shape control rod in Th-RBWR is shown to be insufficient for maintaining adequate SDM to balance the high negative reactivity feedbacks, while maintaining fuel breeding potential, core power rating, and minimum Critical Power Ratio (CPR). Instead, an alternative assembly design, also relying on heterogeneous fuel zoning, is proposed for achieving fissile inventory ratio (FIR) above unity, adequate SDM and meeting minimum CPR limit at thermal core output matching the ABWR power. The new concept was modeled as a single 3-dimensional fuel assembly having reflective radial boundaries, using the BGCore system, which consists of the MCNP code coupled with fuel depletion and thermo-hydraulic feedback modules. Total number of pages: 36 Total number of tables: 13 Total number of figures: 21 |
| Databáze: | OpenAIRE |
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