Results of large-scale test of discontinuity region in a prestressed concrete containment

Hanson, Norman W.; Schultz, D.M.; Roller, John J.; Tang, Hehan

doi:10.1016/0029-5493(87)90210-x

Cited by 4 publications

(2 citation statements)

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“…(ln(P i /P m )) 2 (11) where P i is the pressure capacity of sample i; k is the total number of the samples. Figure 14 illustrates the fragility curves of the gusset region of the NCS at different degrees of liner corrosion.…”

Section: Fragility Curves Of the Ncsmentioning

confidence: 99%

“…The liner is designed to safeguard the leak-tightness of the NCS, while its contribution to the bearing capacity of the NCS is usually neglected. Numerous experimental studies have demonstrated that the cracking of concrete occurs before the tearing of the liner when the NCS is subjected to overpressure loads [9][10][11]. Therefore, the leak-tightness of the NCS in severe accident scenarios is mainly ensured by the liner [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Fragility and Leakage Risk Assessment of Nuclear Containment Structure under Loss-of-Coolant Accident Conditions Considering Liner Corrosion

Li,

Gong

2024

Applied Sciences

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The steel liner plays a key role in ensuring the leak-tightness of nuclear containment structures (NCSs). Once the liner is subjected to corrosion, its corrosion effects can severely impact the leak-tight function of the NCS, especially in severe accident scenarios. Therefore, evaluating the corrosion effects of the liner is essential to guaranteeing the safe operation of nuclear power plants. This paper presents a probabilistic safety analysis of the NCS under liner corrosion conditions. Firstly, the corrosion mechanism of the liner is elucidated, and a refined simulation method is developed to investigate the localized corrosion effects of the liner. Utilizing a probabilistic finite element method, the fragility of the NCS under loss-of-coolant accident (LOCA) conditions is evaluated. Finally, the leakage risk of the NCS at different degrees of liner corrosion is discussed. The results indicate that liner corrosion has a significant impact on the median pressure capacity and high-confidence–low-probability pressure capacity of the NCS. With the aggravation of liner corrosion, the safety margin of the NCS decreases, and the total probability of failure increases. Within the scope of this paper, the NCS can fulfill the probabilistic safety requirements.

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Section: Fragility Curves Of the Ncsmentioning

confidence: 99%