CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping

QIN Jie

Volume 32 Issue S1

Mar. 2025

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Article Navigation > Nuclear Power Engineering > 2011 > 32(S1): 149-151,161

QIN Jie. CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping[J]. Nuclear Power Engineering, 2011, 32(S1): 149-151,161.

Citation:

QIN Jie. CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping[J]. Nuclear Power Engineering, 2011, 32(S1): 149-151,161.

QIN Jie. CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping[J]. Nuclear Power Engineering, 2011, 32(S1): 149-151,161.

Citation:

QIN Jie. CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping[J]. Nuclear Power Engineering, 2011, 32(S1): 149-151,161.

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CFD Research on Normally Stagnant Non-Isolable Branch Lines Attached to RCS Loop Piping

QIN Jie

Shanghai Nuclear Engineering Research and Design Institute, Shanghai, 200233, China

Received Date: 2011-01-24
Rev Recd Date: 2011-03-17

Available Online: 2025-03-08

Abstract

Abstract

In this paper,ANSYS CFX program is used to perform Computational Fluid Dynamic analyses of normally stagnant non-isolable reactor coolant system branch lines.Take Safety Injection,out-of-service charging and Residual heat removal suction lines as example to make models for calculation.The potential exists for thermal stratification is discussed in the paper.The effects of location of valve leakage,the in-leakage rate,the temperature of leakage,the length of horizontal or vertical section and other factors are studied.The results verify that the different generic configurations have different mechanisms for thermal stratification.Thermal stratification in up-horizontal/horizontal configurations is caused by the interaction of swirl flow with in-leakage of cold water from a leaking normally closed valve;in down-horizontal configurations,the thermal stratification occurs due to the cyclic penetration and retreat of the swirl flow in the branch line,combined with heat transfer to the environment.
- CFD,
- Thermal stratification,
- Normally stagnant non-isolable branch tubes

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