Event during operation of Zaporizhzhya NPP Unit №3

Print View Posted on: 03 December 2014

Event Date: 28 November 2014 Event Type: Power Reactor
Event Location: Ukraine, ZAPOROZHYE-3 INES Rating: 0 (Provisional)

On 28 of November 2014 at 19:24 the disconnection of the Unit №3 of Zaporizhzhya NPP from power grid occurred. According to the preliminary information the cause of the occurrence was the failure of electrical equipment in the turbine hall.
As of 3rd December 2014 the reactor facility remains in the “cold” shutdown.
According to the preliminary evaluation this situation is qualified according to INES scale – “0-deviation (No Safety Significance)”.
There were no negative observations in the work of technological protection, blocking, I&C and equipment.
Special investigation commission was established.
Radiation situation at the site of Zaporizhzhya NPP remains within limits of normal operation, physical protection systems operate in normal mode.

General information:
As of 3 of December 2014 all 15 power units of Ukrainian NPP are in the design mode. 12 power units are in operation. Unit №1 of Zaporizhzhya NPP is under the maintenance from 08.09.2014 till 30.12.2014, Unit №1 of Khmelnitsky NPP is under the maintenance from 01.11.2014 till 15.12.2014, Unit №3 of Zaporizhzhya NPP is under the maintenance from 28.11.2014 till 05.12.2014.
Daily information about the status of Ukrainian NPP units can be found via link.
Information about the modes of operation unified energy system of Ukraine (in Ukrainian only) can be found via link.

INES Rating: 0 - Below scale (Provisional)
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? No

Contamination spread within the facility? No
Damage to radiological barriers (incl. fuel damage) within the facility? No

Degradation of Defence In-Depth No

Person injured physically or casualty? No
Is there a continuing problem? No

Nataliya Bizhko
State Nuclear Regulatory Inspectorate of Ukraine

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