Science and Technology of Nuclear Installations / 2012 / Article / Tab 4

Research Article

Consistent Posttest Calculations for LOCA Scenarios in LOBI Integral Facility

Table 4

Resulting sequence of events, comparison between experimental test and calculated results of A1-84.

Events/set pointsTime after experiment initiation (s)Calculated time after transient initiation (s)

Break opening0.00.0
SCRAM signal (at 13.2 MPa + delay 0.5 s)1.01.0
Secondary side cooldown 100 K/h actuation (at 13.2 MPa + 1.5 s valve closure time)1.313.0 (imposed by time)
Pressure in PS 11.7 MPa5.04.76
MCPs start coastdown (at 11.0 MPa + delay 1.0 s)7.07.0
Upper plenum in saturation conditions15.819.3
HPIS actuation (at 11.7 MPa + delay 35 s)40.039.76
PS pressure falls below SS pressure IL/BL90.8/97.8101.3/101.83
Occurrence of minimum primary side mass347.4350.0
Accumulator actuation IL/BL (at 2.8 MPa, disabled at 11 Mpa + delay 500 s in cold leg, not disabled in hot leg)347.0/349.9335.1/335.0
Auxiliary feedwater in broken loop
Accumulator injection stops Cold leg IL/BL509.0/520.0487.4/558.7
Accumulator injection stops Hot leg IL849.0849.0
End of the test (0.1 Mpa)850.0850.0

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