Station Black-Out Analysis with MELCOR 1.8.6 Code for Atucha 2 Nuclear Power Plant

Table 1

CNA-2 PHWR NPP overall data.

CNA-2 overall plant data
Reactor type	PHWR
Net power station output	~745 MWe
Reactor coolant system and moderator system
Total thermal power	2160 MW
Number of coolant channels or fuel assemblies	451
Active core length	5300 mm
Shape of fuel assembly	37-rod cluster
Reactor coolant system and moderator system
Coolant and moderator	D2O
Total thermal power transferred to the feed water/main steam cycle	2174 MW
Total thermal power transferred to steam generators	1954.5 MW
Total thermal power transferred to moderator coolers	220 MW
Number of coolant circuits	2
Number of moderator circuits	4
Total coolant circulation flow	10300 kg/s
Total moderator circulation flow	890 kg/s
Pressure at reactor vessel outlet	115 bar
Coolant temperature at reactor pressure vessel	278°C
Average moderator temperature normal/maximum	170°C/220°C
Steam pressure at steam generator outlet	54.9 bar
Total steam flow	956 kg/s