| Title |
Study of Thermal Stratification into Leaking Flowin the Nuclear Power Plant, Emergency Core Coolant System |
| Keywords |
Thermal stratification ; 열성층 ; Turbulence penetration ; 난류침투 ; Safety injection system ; 안전주입계통 ; Branch pipe ; 분기배관 |
| Abstract |
In the nuclear power plant, emergency core coolant system(ECCS) is furnished at reactor coolant system(RCS) in order to cool down high temperature water in case of emergency. However, in this coolant system, thermal stratification phenomenon can be occurred due to coolant leaking in the check valve. The thermal stratification produces excessive thermal stresses at the pipe wall so as to yield thermal fatigue crack(TFC) accident. In the present study, when the turbulence penetration occurs in the branch pipe, the maximum temperature differences of fluid at the pipe cross-sections of the T-branch with thermal stratification are examine. |