A Coupled Calculation Suite for Atucha II Operational Transients Analysis

Table 1

General design parameters.

Overall plant
Reactor type	Pressurised heavy water reactor
Gross electrical output	745 MW
Thermal reactor output	2161 MW
Reactor core
Type of fuel	Natural uranium dioxide
Number of fuel elements	451
Active length	5300 mm
Average fuel rod heat rate	232 W/cm
Refuelling	On load
Reactor coolant system
Coolant and moderator	Heavy water
Number of parallel coolant loops	2
Number of parallel moderator loops	4
Operating pressure at RPV outlet	115 bar
Coolant temperature at RPV inlet	278 C
Coolant temperature at RPV outlet	314 C
Average moderator temperature	170 C
Steam generators
Type	U-tube heat exchanger
Height	21000 mm
Diameter	Dome 4770 mm/tubesheet 3637 mm
Steam turbine-generator plant
Main steam pressure at steam generator outlet	55.9 bar
Main steam moisture	0.25%
Condenser vacuum	0.050 bar
Circulating water temperature	20 C