Experimental Studies for the VVER-440/213 Bubble Condenser System for Kola NPP at the Integral Test Facility BC V-213

Table 7

Summary of main experimental results.

No.	Parameter	Tests
		Test 4; LB LOCA	Test 5; LB LOCA	Test 1; LB LOCA	Test 7; MSLB	Test 9; MSLB	Test 12; SB LOCA
(1)	Maximum absolute pressure in box 𝑉1, (MPa)	0,202	0,214	0,197	0,1835	0,175	0,111
(2)	Time of achievement of maximum pressure in box 𝑉1, (s)	8,07–9,77	8,89	70–90	90–100	90.5–96	353–388
(3)	Maximum pressure difference across BC, (kPa)	14,55	15,73	11,62	7,8	7,7	4,9
(4)	Maximum absolute pressure in air trap 𝑉5, (MPa)	0,193	0,200	0,191	0,177	0,169	0,106
(5)	Maximum temperature in box 𝑉1, (°C)	120	122	120	118	118	86
(6)	Maximum temperature of BC water, (°C)	78	78	60	56	63	38,5
(7)	Time of check valve closure, (s)	90	87	114	212	185	2240
(8)	Absolute pressure in box 𝑉3 when relief valve opened, (MPa)	0,19	0,17	0,191	0,174	0,167	0,106
(9)	Time of relief valve opening, (s)	88,6	90,3	115	207,6	180	2300
(10)	Occurrence of reverse flow from BC	no	yes	no	no	no	no
(11)	Break location	near	far	middle	far	near	middle