Nuclear Reactor Experiment RHRS Analysis Group E 2003. 6.14
About Members… 97409-005 Kwon Tae-yung 97409-012 Nam Jeong-woo 97409-019 Song Ku-kwon 97409-029 Lee Jeon-kyu 97409-044 Han Man-ghil 97409-045 Han Hyun-sun
Introduction • What to do…? • 1. RHRS Accident Analysis • 2. Derive a Conclusion from given data • How to do…? • 1. Mal functioned CNS • 2. Compare Mal functioned data with the Stable state
RHRS - Residual Heat Removal System • : functions to remove heat from the core and reactor coolant system during plant cool down and refueling operations
RHRS - Residual Heat Removal System • - supplies initial reactor coolant system circulation and purification during a plant startup • - serves as part of the Emergency Core Cooling System (ECCS)
The points that we concerned . ▶ What is the role of RHRS in 100% power ? ▶ How we can know the role of RHRS ?
Analysis . ▶ Plot the data ▶Compare each other ETC . ▶ Running time : 1500 sec
Reactor vessel water level [m] Time(s)
Pressurizer pressure Time(s)
PRZ water level[m] Time(s)
Pressurizer water level [m] Time(s)
Vessel water level [m] Time(s)
Loop 1,2,3 average Temperature(mean value) [ºC] Time(s)
Analysis ▶ Does complex mal function affect the other system? ▶ Is these data reliable?
Discussion Conclusion ▶RHR system is outside of containment ▶Although abnormal RHRS state is happened, the containment condition does not change. ▶The small derivation was due to the unstability of CNS code.
Discussion Another situation ▶ If the reactor is in the state of ECC…
Discussion Another situation ▶ If the reactor is in the state of refueling…
The End Thanks for listening