Weihua LIU, Pan WU, Min FENG, Tinghui TANG, Jianqiang SHAN, Miao GUI. Experimental investigation of bottom reflooding for uniformly heated 5×5 rod bundles and evaluation of thermal safety analysis code[J]. NUCLEAR TECHNIQUES, 2023, 46(10): 100607
- NUCLEAR TECHNIQUES
- Vol. 46, Issue 10, 100607 (2023)
Fig. 1. Configuration of the film boiling test facility
Fig. 2. Schematic of the experimental test section
Fig. 3. Structural diagram of the heating rod
Fig. 4. Flow chart for solving the inverse heat conduction problem
Fig. 5. Determination of quench time
Fig. 6. Temperature variation of the thermocouple at different locations in the reflooding experiment
Fig. 7. Results of quench front propagation (a) Under differing inlet subcooling, (b) Under differing inlet mass flow, (c) Under differing power density
Fig. 8. Modeling diagram of RELAP5
Fig. 9. Comparison of calculated and experimental values for (a) Quench front propagation, (b) Surface temperature change, (c) Differential pressure change
Fig. 10. Comparison of RELAP5 results with experimental data at Axial height of 1 145 mm for surface temperature changes (a) and changes of heat transfer coefficient and heat transfer model (b)
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Table 1. Conditions of film boiling experiments that can be carried out in this test facility
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Table 2. Parameters of the measuring instruments
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Table 3. Uncertainty in key parameters
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Table 4. Experiment matrix
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Table 5. Error analysis of RELAP5
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