Generic vver 1000 mwe
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Generic VVER 1000 MWe. Loss of Feedwater at Full Power Loos of ofsite power– assumed Emergency FW 3&4– disabled Steam bypass to condenser ( BRU -K ) – disabled. Initial conditins (steady-state). Reactor thermal power 3119 MW RPV pressure 15.3 9 M P a

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Generic VVER 1000 MWe

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Generic vver 1000 mwe

Generic VVER 1000 MWe

Loss of Feedwater at Full Power

Loos of ofsite power– assumed

Emergency FW 3&4– disabled

Steambypass

to condenser (BRU-K)– disabled


Initial conditins steady state

Initial conditins (steady-state)

  • Reactor thermal power3119 MW

  • RPVpressure15.39 MPa

  • RPV coolant in/out temp.291.6 / 324.6 degC

  • MCP flow4147 kg/sec / loop

  • Feedwater flow424.5 kg/sec / SG

  • Feedwater temp.220 degC

  • Steam press. (sg dome)6.145 MPa

  • SG water level2.12 m

  • Pressurizer water level8.88 m


Generic vver 1000 mwe

Nodalization diagram - RPV


Generic vver 1000 mwe

Nodalization diagram – Loop 1 (Broken)


Generic vver 1000 mwe

Nodalization diagram – Loop 2 (Intact)


Generic vver 1000 mwe

Nodalization diagram – Loop 3 (Intact)


Generic vver 1000 mwe

Nodalization diagram – Secondary System


Generic vver 1000 mwe

Initial state


Generic vver 1000 mwe

Initial state


Generic vver 1000 mwe

Accident description


Generic vver 1000 mwe

230 sec after the LOFW


Generic vver 1000 mwe

Sequence of Events and Systems Operations


Only bru a signals since 2000 sec

Only BRU-A signals since 2000 sec


Plots for the short time range 0 1000 sec time of the fw loss 100 sec

Plots for the short time range0 – 1000 secTime of the FW loss: 100 sec


Plots for the long time range 0 3600 sec time of the fw loss 100 sec

Plots for the long time range0 – 3600 secTime of the FW loss: 100 sec


Generic vver 1000 mwe

Final state


Generic vver 1000 mwe

Final state


Generic vver 1000 mwe

Final state


Generic vver 1000 mwe

Final state


Generic vver 1000 mwe

Final state


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