INES-event
INES 1

EXCEEDING OF CL-CONCENTRATION IN PRIMARY CIRCUIT WATER

Overhaul and refuelling of unit 2. Assembling after refuelling was finished. Naural circulation of no.6 was assured through the loop no. 5, with loop no.6 as reserve; atmospheric pressure.
Regular sampling showed an exceeded value of chlorides content in the primary circuit water and in the emergency 800 m3 water tank in comparison with tech. specs (limit 0.15 mg/kg, measured 0.18 mg/kg, 0.32 mg/kg, respectively). Non-compliance with tech. specs. lasted for 5 hours. The reason explicitly still has not been revealed.

Location: BOHUNICE-2
Event date: Thu, 09-12-1993
Nuclear event report
Legenda & explanation