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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: Mon, 16-09-1991
ERF description: Unit 4 was operated at full power on 7 September 1991. A small steam leak from the main flange of the primary coolant pump no. 6 was discovered.
On 12 September the leak increased. The Beta-gas specific activity measured in the pump room was 0.7 x 10E-9 CI/L. The gamma dose rate was 7.5 mkr/s at contact.
In accordance with the prescribed limits by the regulatory body special regime for operation of units with WWER-440/230 reactors, unit no. 4 was shut down on 14 September 1991 for 9 days repair of primary coolant pump no. 6 no increase of radioactive release from the plant's stack was detected.
BASIS FOR RATING: Basis for the rating of the event: level 1 was justified acc. P. 4.4 D of the INES users' manual. Small leak, defect of the reactor coolant boundary.
DIFFICULTIES IN RATING:
ERF rating date: 01-01-1991
ERF contact person: Mr. T. Gantchev
ERF address: 69 Shipcyenski Prokhod, Bulgaria
ERF affiliation: Inspect. for Safe Use of Atomic Energy, Committee on the Use of Atomic Energy, for Peaceful Purposes

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