Study on Gas Relaxation Process in Leakage Rate Measurement Stage of Containment Test Based on Time Series Analysis Method
-
摘要: 安全壳试验期间安全壳内气体在泄漏率测量平台经历了温度、蒸汽分压等参数波动并再次进入平稳的弛豫过程，本文针对判断新稳态建立的标准、气体弛豫时间、影响弛豫过程的因素等内容进行分析，以期通过计算检验统计量进行平稳性检验的方法给出判断平稳的标准，并对弛豫过程中各项参数的时间序列进行序列分解，对各参数的弛豫过程分别进行分析。研究结果表明，安全壳内气体因安全壳加压造成的蒸汽分压不均匀是影响弛豫时间的主要因素。因此，进一步提出控制蒸汽分压不平衡势，以缩短泄漏率结果的弛豫时间。Abstract: During the containment test, upon the leakage rate measurement plateau, the temperature, steam partial pressure, and other parameters of gases in the containment fluctuate and then go into the steady relaxation process. This article analyzes the criteria for reaching new steady state, the gas relaxation time, the factors that affect the relaxation process and other aspects to provide the criterion for steady state by performing steady state test via test statistic calculation. Also, this article conducts time series decomposition for various parameters involved in the relaxation process to analyze the relaxation process of each parameter separately. As seen from the study results, the relaxation time is mainly affected by the non-uniform steam partial pressure due to containment pressurization. On this basis, this study further proposes controlling the steam partial pressure imbalance trend to shorten the relaxation time of the leakage rate results.
-
Key words:
- Containment /
- Relaxation process /
- Time series analysis /
- Unit root test /
- Leakage rate
-
图 1 某机组安全壳泄漏率的弛豫过程
Figure 1. Relaxation Process of Leakage Rate of a Containment for One Unit
图 3 温度和蒸汽分压在测量期间的弛豫过程
Figure 3. Relaxation Processes of Temperature and Steam Partial Pressure during Measurement
图 4 蒸汽分压和温度的一阶差分
Figure 4. First Order Differences of Steam Partial Pressure and Temperature
-
[1] American Nuclear Society Standards Committee. Containment system leakage testing requirements: ANSI/ANS-56.8-2002[S]. Illinois: American Nuclear Society, 2002: 26-8. [2] 沈东明,蔡建涛,何锐,等. 基于统计软件R的安全壳泄漏率试验数据有效性分析[J]. 核动力工程,2020, 41(5): 99-103. [3] ENDERS W. Applied econometrics time series[M]. 4th edition, USA: WILEY, 2014: 1-7, 195-246. -
下载:
图(6)
计量
- 文章访问数: 300
- HTML全文浏览量: 136
- PDF下载量: 28
- 被引次数: 0
