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Event Report Forms (ERFs) are filed to the IAEA. Sometimes there are multiple event reports, updating the rating, the event description. Here you only see the latest event report

ERF send date: Tue, 08-09-1998
ERF description: One June 4, 1998 the plant was under 160 MW electrical power operation. At 10.40 a.m. the shift supervisor received an information concerning high level of content of Na in the samples of blow-down lines of SG-16. In the SG3 and SG6 the content of Na exceeded the level established by L&C (2,3mg/kg and 2,1mg/kg instead of permissible 1,5mg/kg). Operational personnel discharged the reactor power down to 80 MWe. At 14.45 were detected and closed two sources of penetration of Na in the secondary circuit. After the reestablishing of the parameters of water the operational personnel increased the reactor power up to 160 MWe. The event caused neither on-site nor off-site radiation impact.
Basic rating: Defense in depth criteria: Level 1- Anomaly beyond the authorized operating regime.
Upgrading: Safety culture. Additional factor was taken into account according to chapter III-5.3 of the INES manual, namely, the repetition of the event indicated that the previous event lessons have not been learned. The final rating was selected as level 2.
ERF rating date: 02-09-1998
ERF contact person: Mr. V. Kourghinian
ERF address: Tigran Medz 4, Armenia
ERF affiliation: Armenian Nuclear Regulatory Authority, Emergency Response Center

This map shows a selection of reports from nuclear and radiological incidents stored in the IAEA NEWS-database.
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