Stichting Laka

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, 13-08-1990
ERF description: After the monthly control of the nuclear monitoring system on July 25 it was not noticed by the personnel, that the ionization chambers of the low and middle range of the monitoring system after controlling were driven out of their working range and not driven back.

This faulty position was observed 24 hours later after controlling by a shift-physicist.

During this period of 24 hrs the nuclear monitoring system for the cold shutdown stage of the reactor was not available. The shutdown concentration of boric acid in the primary circuit during this time was cB=17.1 g/l.
BASIS FOR RATING: degradation of defence in depth: C-2P 1/2
4.2.b human error and
4.2.d procedures are considered inadequate +1
rating 2
DIFFICULTIES IN RATING:
ERF rating date: 01-08-1990
ERF contact person: Mr. K. Kotthoff
ERF address: Schwertnergasse 1, Germany
ERF affiliation: Gesellschaft f. Anlagen und, Reaktorsicherheit

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.
The map shows a maximum of 100 incidents. If hundred incidents or more are within the map, the yellow perimeter indicates from where events are excluded. Drag or zoom the map to explore different areas.

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