On April 6, 1994, at 01:30 during the routine walkdown the operating staff registered not authentic readings of the steam generator no. 3 level controller connected to the emergency protection system circuit. Safety operation conditions of the Technical Specifications which allow corrective measures within 8 hours were violated. Actually the defect has been eliminated in 14 hours. Taking into account the unjustified violation of the Technical Specifications and the fact that the measures for the defect elimination were not timely taken the level was increased from 1 to 2 after the additional investigation according to Fig. of User's manual.
Location: SOUTH UKRAINE-1 Event date: Wed, 06-04-1994
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