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首页> 外文会议>International congress on advances in nuclear power plants;ICAPP 2010 >Reducing Neutron Fluence on the EPR? Reactor Pressure Vessel Using a Heavy Reflector
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Reducing Neutron Fluence on the EPR? Reactor Pressure Vessel Using a Heavy Reflector

机译：减少EPR的中子注量？使用重型反射器的反应堆压力容器

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The AREVA EPR? nuclear power plant is an evolutionary nuclear energy facility reflecting advanced pressurized water reactor (PWR) technology and improvements from research and development (R&D) and lessons learned during construction and operations over the last 40 years. An improvement in PWR technology is found in the EPR? reactor vessel heavy reflector. It is a large steel structure that replaces the thin baffle plates used in existing PWR reactor vessels. The reflector resides between the fuel and the core barrel and above the lower core-support plate. The heavy reflector improves the neutron economy in the active core and reduces the neutron fast flux on the reactor pressure vessel. The effectiveness of the heavy reflector to reduce the fast flux at the inside diameter of the RPV was determined utilizing the DORT and MCNP codes. The heavy reflector provides a factor of about 2.5 reduction in the neutron flux at the peak azimuthal location applying the AREVA NP INC. DORT-based RPV fluence methodology and by a factor of about three based on MCNP code calculations.
机译：AREVA EPR？核电厂是一种进化的核能设施，反映了先进的压水堆（PWR）技术以及研发（R＆D）的改进以及过去40年来在建设和运营过程中获得的经验教训。在EPR中发现了压水堆技术的改进？反应堆容器重型反射器。它是一种大型钢结构，代替了现有PWR反应堆容器中使用的薄挡板。反射器位于燃料和堆芯之间，并位于下部堆芯支撑板的上方。重型反射器提高了活性堆芯的中子经济性，并减少了反应堆压力容器上的中子快速通量。使用DORT和MCNP代码确定了重型反射器在RPV内径处减小快速通量的有效性。采用AREVA NP INC。基于DORT的RPV能量通量方法，重型反射器使峰值方位角位置的中子通量减少了约2.5倍，基于MCNP代码计算，使中子通量减少了约3倍。

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