Long-term reliability evaluation of nuclear containments with tendon force degradation

Kim, Sang Hyo; Choi, Moongoo; Joung, Jung Yeun; Kim, Kun-Soo

doi:10.1016/j.nucengdes.2013.06.025

Cited by 21 publications

(3 citation statements)

References 13 publications

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“…Consequently, the analysis and assessment of the NCS under aging conditions have attracted substantial attention in nuclear engineering. Over the past decades, extensive research efforts have been dedicated to exploring the aging effects on the NCS, including the aging form and aging mechanism of the NCS [1], the long-term behavior and service life prediction of the NCS [2][3][4], the structural response of the aged NCS subjected to overpressure and seismic loads [5,6], a reliability assessment of the aged NCS [7,8], etc. These studies provide significant insights into the establishment of management strategies for aging for nuclear power plants.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Previous research, as gleaned from these studies, predominantly targeted common structural elements such as beams [ 2 , [20] , [21] , [22] , [23] ], columns [ 6 , 12 , [24] , [25] , [26] ], bridges [ 10 , [27] , [28] , [29] ], slabs [ 21 , [30] , [31] , [32] ], and nuclear containment structures [ [33] , [34] , [35] , [36] , [37] ]. Notably, there were limited investigations into the application of tendons in special structural components like walls [ 38 ], towers [ 39 ], tunnels [ 40 ], and frames [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

Performances and properties of steel and composite prestressed tendons – A review

Rafieizonooz,

Jang,

Kim

et al. 2024

Heliyon

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“…Studies have been conducted on the dynamic instability behavior of suspended floating tunnel (SFT) using fluid, structural, and dynamic analysis techniques [ 10 ] and also on the development of offshore structural health monitoring using fiber bragg grating (FBG) sensors [ 11 ]. Research has been conducted to develop a model for reliability analysis considering the tension force loss in the tension materials used in reactor containment buildings [ 12 ]. Monitoring technologies used in these various fields enhance the stability of structures and facilitate maintenance, thereby protecting lives and property.…”

Section: Introductionmentioning

confidence: 99%

Yoke-Type Elasto-Magnetic Sensor-Based Tension Force Monitoring Method for Enhancement of Field Applicability

Lee,

Kyung,

Kim

2024

Sensors

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Tension members are key members that maintain stability and improve the strength of structures such as cable-stayed bridges, PSC structures, and slopes. Their application has recently been expanded to new fields such as mooring lines in subsea structures and aerospace fields. However, the tensile strength of the tension members can be abnormal owing to various risk factors that may lead to the collapse of the entire structure. Therefore, continuous tension monitoring is necessary to ensure structural safety. In this study, an improved elasto-magnetic (E/M) sensor was used to monitor tension force using a nondestructive method. General E/M sensors have limitations that make it difficult to apply them to operating tension members owing to their solenoid structure, which requires field winding. To overcome this problem, the magnetization part of the E/M sensor was improved to a yoke-type sensor, which was used in this study. For the development of the sensors, the numerical design and magnetization performance verification of the sensor were performed through eddy current solution-type simulations using ANSYS Maxwell. Using the manufactured yoke-type E/M sensor, the induced voltage signals according to the tension force of the specimen increasing from 0 to 10 tons at 1-ton intervals were repeatedly measured using DAQ with wireless communication. The measured signals were indexed using peak-to-peak value of induced voltages and used to analyze the signal change patterns as the tension increased. Finally, the analyzed results were compared with those of a solenoid-type E/M sensor to confirm the same pattern. Therefore, it was confirmed that the tension force of a tension member can be estimated using the proposed yoke-type E/M sensor. This is expected to become an effective tension monitoring technology through performance optimization and usability verification studies for each target tension member in the future.

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Long-term reliability evaluation of nuclear containments with tendon force degradation

Cited by 21 publications

References 13 publications

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

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

Performances and properties of steel and composite prestressed tendons – A review

Yoke-Type Elasto-Magnetic Sensor-Based Tension Force Monitoring Method for Enhancement of Field Applicability

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