Calculation of Local Stress and Fatigue Resistance due to Thermal Stratification on Pressurized Surge Line Pipe

Thermal stratification introduces thermal shock effect which results in local stress and fetique problems that must be considered in the design of nuclear power plant components. Local stress and fatique calculation were performed on the Pressurize Surge Line piping system of the Pressurize Water Re...

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Bibliographic Details
Published in:Proceedings of the 2nd International Conference 2009-11, Vol.1244, p.232-238
Main Authors: Bandriyana, B, Utaja
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Design engineering
Fatigue strength
Finite element method
Fluid flow
Fluids
Mathematical analysis
Mathematical models
Nuclear engineering
Nuclear power generation
Nuclear power plants
Nuclear reactor components
Nuclear reactors
Operating temperature
Pipe
Pipelining (computers)
Stratification
Stresses
Surges
Thermal shock
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Summary:Thermal stratification introduces thermal shock effect which results in local stress and fetique problems that must be considered in the design of nuclear power plant components. Local stress and fatique calculation were performed on the Pressurize Surge Line piping system of the Pressurize Water Reactor of the Nuclear Power Plant. Analysis was done on the operating temperature between 177 to 343 degree C and the operating pressure of 16 MPa (160 Bar). The stagnant and transient condition with two kinds of stratification model has been evaluated by the two dimensional finite elements method using the ANSYS program. Evaluation of fatigue resistance is developed based on the maximum local stress using the ASME standard Code formula. Maximum stress of 427 MPa occurred at the upper side of the top half of hot fluid pipe stratification model in the transient case condition. The evaluation of the fatigue resistance is performed on 500 operating cycles in the life time of 40 years and giving the usage value of 0,64 which met to the design requirement for class 1 of nuclear component. The out surge transient were the most significant case in the localized effects due to thermal stratification.
ISSN:0094-243X