华龙一号小幅功率提升研究

对华龙一号热功率精度进行了分析，计算了蒸汽发生器出口压力测量精度、给水温度测量精度和给水流量测量精度对华龙一号热功率精度的贡献度，通过定量化的数据证明了主给水流量测量精度对热功率计算精度的影响最大。基于目前孔板流量计精度低，长期使用精度劣化的问题，提出采用高精度（0.3%）的超声波流量计来测量主给水流量，计算结果表明，采用超声波流量计可以获得0.97%的功率提升。 

Study on Small Power Improving of HPR1000

The thermal power accuracy of HPR1000 was analyzed, and the contribution of steam generator outlet pressure measurement accuracy, feed water temperature measurement accuracy and feed water flow measurement accuracy to HPR1000 thermal power accuracy was calculated. The quantitative data proves that the main feedwater flow measurement accuracy has the greatest influence on the thermal power calculation accuracy. Considering the current problem of low accuracy and the deterioration of the orifice flowmeter due to long-term use, a high-precision (0.3%) ultrasonic flowmeter is proposed to measure the main feed water flow. The calculation shows that the ultrasonic flowmeter can achieve a power increase of 0.97%.