问题描述：
英语翻译
The safety buses were deenergized and automati-
cally reenergized from the emergency diesel gen-
erators.Decay heat removal systems maintained
the cooling function for the reactor fuel.The fol-
lowing equipment problems were noted:a steam
bypass valve opened; a reactor water clean-up sys-
tem pump tripped; the off-gas system isolated,and
a keep-fill pump was found to be air-bound,
requiring venting and filling before the residual
heat removal system loop A and the low pressure
core spray system could be restored to service.
The lowest emergency declaration,an Unusual
Event,was declared at about 16:20 EDT due to the
loss of offsite power.Offsite power was restored to
at least one safety bus at about 18:13 EDT on
August 14.The main generator was reconnected
to the grid at about 23:15 EDT on August 21.After
the plant restarted,a surveillance test indicated a
problem with one emergency diesel generator.3
Nuclear Power Plants With a Significant
Transient
The electrical disturbance on August 14 had a sig-
nificant impact on seven plants that continued to
remain connected to the grid.For this review,sig-
nificant impact means that these plants had signif-
icant load adjustments that resulted in bypassing
steam from the turbine generator,opening of relief
valves,or requiring the onsite emergency diesel
generators to automatically start due to low
voltage.
The safety buses were deenergized and automati-
cally reenergized from the emergency diesel gen-
erators.Decay heat removal systems maintained
the cooling function for the reactor fuel.The fol-
lowing equipment problems were noted:a steam
bypass valve opened; a reactor water clean-up sys-
tem pump tripped; the off-gas system isolated,and
a keep-fill pump was found to be air-bound,
requiring venting and filling before the residual
heat removal system loop A and the low pressure
core spray system could be restored to service.
The lowest emergency declaration,an Unusual
Event,was declared at about 16:20 EDT due to the
loss of offsite power.Offsite power was restored to
at least one safety bus at about 18:13 EDT on
August 14.The main generator was reconnected
to the grid at about 23:15 EDT on August 21.After
the plant restarted,a surveillance test indicated a
problem with one emergency diesel generator.3
Nuclear Power Plants With a Significant
Transient
The electrical disturbance on August 14 had a sig-
nificant impact on seven plants that continued to
remain connected to the grid.For this review,sig-
nificant impact means that these plants had signif-
icant load adjustments that resulted in bypassing
steam from the turbine generator,opening of relief
valves,or requiring the onsite emergency diesel
generators to automatically start due to low
voltage.
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