Numerical simulation of temperature and thermal stress for nuclear piping by using computational fluid dynamics analysis and Green’s function

Boo, Myung-Hwan; Oh, Chang-Kyun; Kim, Hyun-Su; Choi, Choeng-Ryul

doi:10.1007/s12206-017-0421-9

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“…The calculation of thermal stress by Green's function method is based on the calculation results of the temperature field, which is highly dependent on thermal boundaries for thermal zones. Boo used the method of Green's function to calculate the fluid temperature in the pipe according to the change in the temperature of the fluid at the inlet of the branch pipe, but if the surge line is much longer and the stratification region is very large, this method is not very suitable [13]. There is no clear solution for determining the thermal zone boundary to obtain the reality of the temperature field.…”

Section: Introductionmentioning

confidence: 99%

Fast Calculation of Transient Thermal Stress in Surge Lines with Thermal Stratification Region

Gao

et al. 2021

Applied Sciences

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Nuclear power plants applying for license renewal are required to undertake a fatigue assessment of various components, which demands the fast calculation of transient thermal stress of the fatigue-sensitive components such as surge lines. In this study, the strategy of Green’s function database construction for the thermal stratification region was investigated, and the thermal stress calculation was shown to be more accurate by dividing the flow cases and thermal zones. Furthermore, a method to determine the fluid temperature for the thermal zones of the thermal stratification region was studied. In addition to the temperature of the hot leg fluid and the outlet fluid from the pressurizer, seven thermocouples installed on the outside wall in the thermal stratification region were used to determine the fluid temperature of thermal zones with stratification, and the calculation result of the fluid temperature was verified with the temperature Green’s functions.

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Section: Introductionmentioning

confidence: 99%

Fast Calculation of Transient Thermal Stress in Surge Lines with Thermal Stratification Region

Gao

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

show abstract

Numerical simulation of temperature and thermal stress for nuclear piping by using computational fluid dynamics analysis and Green’s function

Cited by 1 publication

References 1 publication

Fast Calculation of Transient Thermal Stress in Surge Lines with Thermal Stratification Region

Fast Calculation of Transient Thermal Stress in Surge Lines with Thermal Stratification Region

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