VGB POWERTECH 7 (2021) - International Journal for Generation and Storage of Electricity and Heat

Study on the integrity of containment against hydrogen threats VGB PowerTech 7 l 2021
(a) B1: membrane strain
(c) B1: equivalent stress
(a) B2: membrane strain
(c) B2: equivalent stress
(a) B3: membrane strain
(c) B3: equivalent stress
Fig. 10. Structural analysis for case B3.
(b) B1: plastic strain
(d) B1: displacement
(b) B2: plastic strain
(d) B2: displacement
(b) B3: plastic strain
(d) B3: displacement
fect with the time history, and the maximum
membrane strain, plastic strain,
stress, and displacement generated in the
containment were examined. Finally, it
was evaluated whether the maximum
membrane strain rate of the containment
satisfies the allowable value of 1.5 % or
less. The analysis results revealed that that
the dynamic pressure analysis results for
all cases were satisfied within the safety
criterion.
In conclusion, the reference reactor has a
low possibility of hydrogen combustion under
severe accident conditions, and the hydrogen
combustion analysis under a very
conservative assumption showed a sufficient
structural integrity from the results of
the dynamic pressure response of the containment
under the combustion load.
Therefore, it is confirmed through a comprehensive
evaluation that the integrity of
the containment can be sufficiently secured
even in the event of a hydrogen
threat during a severe accident.
Acknowledgments
This work was supported by Korea Hydro &
Nuclear Power Co., Ltd. (KHNP) and the
Nuclear Research & Development of the
Korea Institute of Energy Technology and
Planning (KETEP) grant funded by the Korea
government Ministry of Trade, Industry
& Energy (No: 2019311010050). Also,
we would like to thank Editage (www.editage.co.kr)
for English Language editing.
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