Balakovo

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Rostekhnadzor Registers Two Minor Events at Nuclear Plants in November

Sunday, December 7, 2008

Dec 5 (Interfax) - Russia's Federal Service for Ecological, Technological and Nuclear Oversight (Rostekhnadzor) registered two minor events at nuclear power plants in November 2008.

On November 12, Balakovskaya NPP's power unit N2 switched off without activation of the emergency system, the agency said in a press release. Rostekhnadzor has already completed an investigation of this incident. The discharge occurred as a result of a switch- off of the primary circulatory pumps, caused by the loss of a pressure signal in the lubrication system's oil pumps, the agency said.

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Balakovo Nuclear Plant Unit Back in Service - Operator

Saturday, August 30, 2008

MOSCOW. Aug 29 (Interfax) - Generating Unit No. 2 of the Balakovo Nuclear Power Plant has been reconnected into Russia's electricity grid after routine safety maintenance, Russia's nuclear power plants operator, Rosenergoatom, said in a press release.
All of the plant's four generating units are currently in operation.

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INES-event
INES 1

FAILURE OF TWO DIESEL GENERATORS WHILE ROUTINE TESTING DURING UNIT MAINTENANCE

Restart operations were in progress at the unit with reactor at the minimum controlled power level. While testing safety system (SS) train 2 under the load sequencing program DG-2 failed to start. While testing SS train 1 under the above program DG-1 failed to start as well. In accordance, with the procedure the reactor was brought to subcriticality. Defect in SS train 1 was corrected (speed controller maladjustment at DG-1) and DG-1 was placed in expectation (hot standby) mode.

Category: Power Reactor Balakovo Russian Federation »

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INES 0

UNIT SHUTDOWN DUE TO FIRE IN THE 6 KV SWITCHGEAR ROOM

The unit was operating at nominal power. At 01:07:15 a single-phase ground short-circuit of phase "C" occurred in the terminals box of electric motor of one out of six service water pumps. Due to overvoltage in the 6 kV auxiliary power lines caused by the above short-circuit a short-circuit occurred in the current duct of the service power feeder in the area of protections of the auxiliary power transformer (APT).

Category: Power Reactor Balakovo Russian Federation »