论文部分内容阅读
中国改进型百万千瓦级压水堆(CPR1000)机组瞬态试验过程中,由于机组状态剧烈变化,会在短时间内引入大量负反应性,使一回路不易维持堆芯状态稳定,试验过程中需要通过准确调节一回路冷却剂的硼浓度以补偿反应性的变化。通过研究机组瞬态试验过程中功率控制棒(G棒)、温度控制棒(R棒)、功率变化、氙毒变化等引起的反应性变化,并依据当前硼浓度及其微分价值,分析计算得到所需硼浓度变化量及试验过程中所需硼稀释量,并根据计算结果为运行人员制定合适的机组控制策略。调试过程及试验结果表明,研究分析硼稀释量能够显著降低机组控制风险,提高机组运行质量,获得良好的经济效益。
During the transient test of the unit of China’s improved 1 million kilowatt pressurized water reactor (CPR1000), due to the drastic changes of the unit status, a large amount of negative reactivity will be introduced in a short period of time, which makes it difficult for the first circuit to maintain the stability of the reactor core. During the test It is necessary to compensate for changes in reactivity by accurately adjusting the boron concentration of the primary coolant. By investigating the changes of reactivity caused by power control rod (G rod), temperature control rod (R rod), power change and xenon poisoning during the transient test, the current boron concentration and its differential value are analyzed and calculated The required amount of boron concentration changes and the amount of boron required during the test, and based on the calculation results for the crew to develop appropriate control strategies. The debugging process and the test results show that the research and analysis of boron dilution can significantly reduce the risk of unit control, improve unit operation quality and obtain good economic benefits.