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

Table 5

Chronology of events during LB LOCA.

Time, sec	Event
0.0	Double-ended guillotine break
0.0	Total loss of electricity
0.0	Turbine isolation begins
0.03	Scram signal
0.1	More then three main coolant pumps dropped out
4.76	Pressurizer pressure <10,8 MPa
5.41	Start of hydroaccumulator injection to downcomer
5.46	Start of hydroaccumulator injection to upper plenum
6.99	Pressurizer level <2.76 m
8.22	Pressurizer level <2.26 m
16.00	Start of high-pressure injection system
32.90	Start of low-pressure injection system