Design and hydraulic performance studies on an axial
            <scp>lead‐bismuth</scp>
            pump for
            <scp>GEN‐IV</scp>
            reactors

Wang, Kailin; Li, Liangxing; Wang, Yan‐Bo; Zhang, Shuanglei

doi:10.1002/er.5778

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…An SBO is a dangerous condition because there is no alternative current (AC) power to operate the safety systems and their pumps and valves to cope with the condition. Managing SBOs is an important safety consideration not only for light water reactors but also in other reactor types such as lead-bismuth reactors [4], sodium-cooled fast reactors [5], and lead or lead-alloy-cooled fast reactors [6].…”

Section: Introductionmentioning

confidence: 99%

Station Blackout Risk of a Nuclear Power Plant with Consideration of Time Dependencies and Common Cause Failures

Kim

2023

International Journal of Energy Research

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One of the most significant risk contributors to a nuclear power plant is the station blackout (SBO) risk. The calculation of an SBO risk is complicated because different scenarios involving the failures of various components, and their time dependencies must be considered. Because time dependency modeling is difficult, the conventional approach based on event trees (ETs) and fault trees (FTs) makes conservative assumptions when calculating the SBO risk. This study describes how these time dependencies can be effectively modeled and provides the mathematical formulas to model the time dependencies when calculating the SBO risk of a nuclear power plant when there exist redundant components and their common cause failures are considered. The mathematical formulas used to model the time dependencies are validated by Monte Carlo simulations. The conventional ET/FT approach is compared with the time dependency modeling approach to evaluate the conservativeness of the results it generates. Two significant factors affecting the degree of conservativeness of the conventional ET/FT approach are also examined. The time dependency modeling with consideration of the common cause failures described in this study is expected to provide a sound mathematical framework for analyzing the SBO risk of a nuclear power plant.

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Section: Introductionmentioning

confidence: 99%

Station Blackout Risk of a Nuclear Power Plant with Consideration of Time Dependencies and Common Cause Failures

Kim

2023

International Journal of Energy Research

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“…The streamline method (SLM) and the blade load method (BLM) are two widely utilized design methods for propulsion pumps. The axial flow pumps designed by the SLM [8] have high efficiency and a broad working range. On the other hand, the BLM [9] can be employed to suppress the flow separation in the pumps by adjusting the blade load distribution.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the BLM [9] can be employed to suppress the flow separation in the pumps by adjusting the blade load distribution. Wang et al [8] designed an axial pump based on the SLM, and the impact of design parameters on hydraulic performance was studied. Bonaiuti et al [10] designed a mixed flow water jet pump based on the BLM; the effect of design configurations on the hydrodynamic and suction performance was investigated.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Cavitation in Two Axial-Flow Water Jet Propulsion Pumps

Lai

2023

Processes

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To investigate the appropriate design method of the water jet pump, numerical simulations are carried out to compare the cavitation in two pumps designed by the streamline method and the blade load method. Based on a brief description of the design methods, the internal flow fields and cavitation in the two axial flow water jet propulsion pumps are studied by using the SST k−ω turbulence model and barotropic law cavitation model. The cavitation location, disturbance velocity field, blade load, and their variations with the cavitation number are analyzed. The results show that the pump designed by the blade load method has a smaller cavitation bubble than the pump designed by the streamline method. With the decrease of cavitation number, the vapor bubbles first appear at the blade tip of the leading edge and then extend from the leading edge to the trailing edge. The bubble thickness and the area of the low pressure on the suction surface also increases. A whirl in the disturbance velocity is observed, which turns the direction of incoming flow to the cavitation area. Furthermore, the head drop of water jet pump is related to the decrease of blade load. The results also show that at the point of cavitation number equal to 0.319, an unexpected peak of head in the pump designed by the streamline method is observed, which indicates an unstable working point for the pump. If the priorities are anti-cavitation performance and high efficiency at the design condition, the blade load method is the first choice to design pumps. While the streamline method should be adopted if high efficiency at large flow rates is preferred.

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Application and optimal design of the bionic guide vane to improve the safety serve performances of the reactor coolant pump

Liu

Wang

et al. 2022

Nuclear Engineering and Technology

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Design and hydraulic performance studies on an axial lead‐bismuth pump for GEN‐IV reactors

Cited by 5 publications

References 26 publications

Station Blackout Risk of a Nuclear Power Plant with Consideration of Time Dependencies and Common Cause Failures

Station Blackout Risk of a Nuclear Power Plant with Consideration of Time Dependencies and Common Cause Failures

Comparison of Cavitation in Two Axial-Flow Water Jet Propulsion Pumps

Application and optimal design of the bionic guide vane to improve the safety serve performances of the reactor coolant pump

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