Experimental Investigation on Measuring Leakage Rate of Nuclear Power Plant Containment by Constant Pressure Method
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摘要: 为进一步优化核电厂安全壳泄漏率的测量方案，提高测量结果的稳定性与可靠性，本研究基于LabVIEW程序开发了一种新的泄漏率测量方法，即恒压法。通过开展大尺度安全壳模拟体的泄漏率测量实验，首次证实了恒压法应用于核电厂内层安全壳与外层安全壳泄漏率测量的适用性。研究表明，恒压法测量泄漏率的结果与传统压降法的测量结果具有很好的一致性，相对偏差小于5%。对于外层安全壳泄漏率的测量，相比压降法，恒压法可在保证测量精度的前提下将测量时间由10 h大幅缩减至0.8 h以内。研究结论可为恒压法的应用提供理论基础。Abstract: In order to further optimize the containment leakage rate measurement scheme and improve the stability and reliability of the measured value, a new leakage rate measurement method, namely the constant pressure method, was developed based on the LabVIEW code in this study. The applicability of the constant pressure method to the leakage rate measurement of the inner containment and the outer containment was confirmed for the first time by carrying out the leakage rate measurement experiment of the large-scale containment simulant. The research shows that the leakage rate measured by the constant pressure method is in good agreement with those measured by traditional pressure drop method, and the relative deviation is less than 5%. For the measurement of the leakage rate of the outer containment, compared with the pressure drop method, the constant pressure method can greatly reduce the measurement time from 10 h to less than 0.8 h on the premise of ensuring the measurement accuracy. The research conclusions can provide theoretical basis for the application of constant pressure method.
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图 2 恒压法测量泄漏率的实验数据曲线
Figure 2. Experimental Data Curve of Leakage Rate Measured by Constant Pressure Method
图 3 恒压法测量微负压条件下泄漏率的实验结果
Figure 3. Data Curve of Leakage Rate Measured by Constant Pressure Method under Micro-Negative Pressure
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