应用MECLOR对严重事故实验Phebus FPT3的模拟分析

Simulation and Analysis of Severe Accident Experiment Phebus FPT3 With MECLOR

使用MECLOR1.8.6程序对严重事故实验Phebus FPT3进行了模拟分析。通过建模计算,得到了严重事故过程中燃料棒的行为,氢气的产生,裂变产物的释放、迁移和沉降及安全壳的热工水力响应等相关数据。计算值与实验值的对比分析表明,燃料棒的行为、氢气产生的时间和趋势及安全壳的热工水力响应与实验值吻合良好。由于相应程序模型的限制,最终产氢的总量及裂变产物相关的计算值与实验值有所不同。其中,计算的氢气总量较实验值偏小,计算的裂变产物释放量和在安全壳中的沉降量大多较实验值稍高。此外,还利用快速傅里叶变换方法(FFTBM)对整个建模计算进行了详细的定量化评估。

The severe accident experiment Phebus FPT3 was simulated and analyzed by using MECLOR1.8.6 .The fuel rod behavior ,the hydrogen production ,the release , transport and deposition of fission products ,and the thermo‐hydraulic condition in the containment were calculated .The comparison between calculation results and experi‐ment data show s that the rod behavior ,the hydrogen production time and trend ,and the thermo‐hydraulic condition in the containment fit quite well .But the total quantity of hydrogen production and the fission product relative data have some differences betw een the calculation results and experiment data ,because of some limits of the model in the code .The calculated total quantity of hydrogen production is smaller than that of the experiment ,and most of the calculation results about the release and deposition of the fission products are a little bigger than those of the experiment .Besides ,the accura‐cy quantification of the calculation was evaluated with the fast Fourier transform based method （FFTBM ） .