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

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)

  • 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


Nodalization diagram - RPV


Nodalization diagram – Loop 1 (Broken)


Nodalization diagram – Loop 2 (Intact)


Nodalization diagram – Loop 3 (Intact)


Nodalization diagram – Secondary System


Initial state


Initial state


Accident description


230 sec after the LOFW


Sequence of Events and Systems Operations


Only BRU-A signals since 2000 sec


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


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


Final state


Final state


Final state


Final state


Final state


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