Science and Technology of Nuclear Installations

Research Article

A Coupled Calculation Suite for Atucha II Operational Transients Analysis

Table 2

Information exchanged by the three codes. The actual values are stored in shared memory segments and are read by each code after the corresponding semaphore is set to green by the main code DyPRA.


Variable	Written by	Read by

Lower plenum pressure	DYNETZ	RELAP
Upper plenum pressure	DYNETZ	RELAP
Coolant internal energy at the core inlet for loop 1	DYNETZ	RELAP
Coolant internal energy at the core inlet for loop 1	DYNETZ	RELAP
Fraction of power directly dissipated in the moderator	DYNETZ	RELAP
Conduction heat flux between coolant and moderator	DYNETZ	RELAP
Control rod position	DYNETZ	PCE
Moderator temperature distribution	DYNETZ	PCE
Total power	PCE	RELAP & DYNETZ
Relative power distribution	PCE	RELAP & DYNETZ
Decay power	PCE	DYNETZ
Ex-core neutron detectors readings	PCE	DYNETZ
In-core neutron detectors readings	PCE	DYNETZ
Coolant density distribution	RELAP	PCE
Fuel temperature distribution	RELAP	PCE
Coolant temperature distribution	RELAP	PCE
Mass of heavy water inside The core	RELAP	DYNETZ
Coolant mass flow in each channel	RELAP	DYNETZ
Outlet coolant enthalpy each channel	RELAP	DYNETZ