On the 22nd of February, 2015
at 02.53 a.m.
two main pumps (main pump-2,4) of the South-Ukrainian
NPP unit No.1 were switched off. According to the project algorithm, the unit
was automatically unloaded from capacity of 830 MW to 336 MW.
eliminated the malfunction
(replacement of pneumocephaly device at
localizing armature), NPP personnel put into operation the main pump-2,4. As of 14.00 p.m. February 23, 2015 capacity
of NPP unit was restored.
By preliminary estimate the event was
the event without safety significance – “below Scale/Level 0” according
to INES scale. There were no remarks concerning
operation of technological protection systems, locking, automatics and equipment.
A commission on malfunction investigation
Radiation at the site of the South-Ukrainian NPP and
neighboring area remains unchanged at the value of 12 mR/h, which is usual background
radiation level for the NPP area.
Physical protection system operates in normal mode.