Assessment of TRACE CCFL Model with SBLOCA Experiment of IIST Facility

Table 1

The comparison of major parameters between IIST facility and the Maanshan NPP.

Parameter	IIST	Maanshan PWR	IIST/PWR
Design pressure (MPa)	2.1	15.6	1.35×10^−1
Maximum core power (MW)	0.45	2775	1.62×10^−4
Primary system volume (m^3)	5.37×10^−1	2.15×10^2	2.50×10^−3
Number of loops	3	3	1
Core
Height (m)	1.0	3.6	2.77×10^−1
Hydraulic diameter (m)	1.08×10^−1	1.22×10^−2	8.85
Bypass area (m^2)	7.2×10^−5	1.54×10^−2	4.67×10^−3
Hot leg
Inner diameter, 𝐷 (m)	5.25×10^−2	7.35×10^−1	7.13×10^−2
Length, 𝐿 (m)	2.0	7.28	2.75×10^−1
𝐿/√𝐷 (m^0.5)	8.72	8.48	1.03
U-tube in one SG
Number	30	5626	5.33×10^−3
Average length (m)	4.08	16.85	2.24×10^−1
Inner diameter (mm)	15.4	15.4	1.0
Volume (m^3)	2.28×10^−2	18.44	1.23×10^−3
Cold leg
Inner diameter, 𝐷 (m)	5.25×10^−2	7.87×10^−1	6.67×10^−2
Length, 𝐿 (m)	5.0	15.7	3.18×10^−1
𝐿/√𝐷 (m^0.5)	21.8	17.69	1.22
Downcomer
Flow area (m^2)	0.0185	2.63	7.03×10^−2
Hydraulic diameter (m)	4.12×10^−2	4.8×10^−1	8.58×10^−2
Pressurizer
Volume (m^3)	9.32×10^−2	39.64	2.35×10^−3
Surge-line flow area (m^2)	3.44×10^−4	6.38×10^−2	5.39×10^−3