Use of the Natural Circulation Flow Map for Natural Circulation Systems Evaluation

Table 2

Relevant characteristics of NPP considered for the application of the NCFM.

	PWR	PWR	PWR	WWER-1000	EPR	AP-600	EP-1000
Nominal power (MWt)	1877	870	2733	3000	4250	1972	2958
Primary system volume (m^3)	167	150	330	359	459	211	339
SG type	U-tubes	U-tubes	Once-through	Horizontal	U-tubes	U-tubes	U-tubes
No. of loops	2	4	2	4	4	2	3
No. of pumps	2	4	4	4	4	4	6
Nominal mass inventory (Mg)	108	108	224	240	307	145	227
Nominal core flow (kg/s)	9037	3150	17138	15281	20713	8264	14507
Pressurizer and SG pressure (MPa)	15.6 6.	14.0 3.1	15.0 6.4	15.7 6.3	15.5 7.2	15.5 5.5	15.8 6.4