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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, 19-02-1991
ERF description: On 5 February 1991 at 12.00 pm during the routine survey of the reactor compartment a ruptured membrane of the pressurizer discharge tank was discovered. The gas-aerosol activity near the discharge tank was measured 3 x 10-8 Ci/l, and the activity in the hermetic steam generator box was measured 8 x 10-9 Ci/l. A possible reason for the rupture of the membrane is a routine blowing away of the hydrogen in the pressurizer by means of low-pressure nitrogen.
BASIS FOR RATING: All safety functions were available. This justifies level 0 accordingto Table A1 of the Addendum. The event reveals a deficiency in the safetyculture because the membrane was made of unproper material and the rupturewas discovered too late. Thus level 1 was selected. Point A6 of theAddendum.
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.
Locations are estimates. Contact us if a location is wrong.
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Power Reactor Research Reactor Radwaste Facility Enrichment Facility Radiation Source Irradiation/Accelerator Facility Transportation

Fuel Fabrication Fuel Reprocessing Research Facility Mining/Milling Radioisotope Processing/Handling Facility Other