Research of Neutron Fluence Computation Methods for MOX Fuelled Reactor Core
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摘要: 快中子注量是影响压力容器材料性能的重要指标。在堆芯装有钚铀氧化物混合燃料(MOX燃料),堆芯物理特性发生明显变化时,现有的屏蔽计算软件能否准确预测压力容器所受的快中子注量率值得研究。本研究分别使用MCNP、TORT、SCALE等国际通用的屏蔽计算程序对VENUS-2基准题进行分析比较。研究表明,各软件对含MOX燃料堆芯的中子注量率计算偏差均在合理的范围内,能满足工程设计的需求,MCNP程序的计算精度相对更高。Abstract: Changes in the mechanical properties of reactor vessel materials result from the exposure to the fast neutron. The use of MOX fuel in LWRs presents different neutron characteristics, and it is worthy to study whether the present software can calculate the structural integrity of reactor components. This paper use MCNP, TORT and SCALE to calculate VENUS-2 benchmark, and the calculation shows that all this software can get reasonable result that can be used in the design. MCNP has the highest accuracy.
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Key words:
- MOX fuel /
- Fast neutron fluence /
- VENUS-2 benchmark
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