Science and Technology of Nuclear Installations

Research Article

Consistent Posttest Calculations for LOCA Scenarios in LOBI Integral Facility

Table 3

Resulting sequence of events, comparison between experimental test and calculated results of BL-44.
Events/set-pointsTime after experiment initiation (s)Calculated time after transient initiation (s)
Break opening0.00.0
Scram power curve enabled1.42.6
Start of the main coolant pumps coast down0.90.0
Main steam line valve closure—3.6
Feedwater valve closure1.32.6
Upper plenum in saturation condition10.013.0
Pressurizer emptied25.025.0
Break two-phase flow117.0115.0
First dry out189.0—
Loop seal clearing—intact loop197.02250.0
Loop seal clearing—broken loop—250.0
Occurrence of minimum primary side mass
First427.0445.0
Second2071.02070.0
Primary-secondary pressure reversal208.0212.0
Second dry out372.0420.0
Accumulator injection starts429.0439.0
Accumulator injection stops970.01065.0
Rewetting due to accumulator547.0525.0
Final dry out1711.01795.0
LPIS start2065.02073.0
Final rewetting2203.02207.0
End of the test2400.03000.0