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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: Thu, 03-10-1996
ERF description: Unit no. 2 of Narora Atomic Power Station was operating at 215 MWe. Channel L-05 refuelling was in progress. All the four spent fuel bundles were received in the down stream refuelling machine. Due to the sluggish operation of downstream fuelling machine latch it was not possible to box up the channel. Hence, it was decided to push back the hot bundles into the channel by resorting to reverse fuelling (fuelling against the direction of flow). Insertion of spent fuel bundles and ram extension added negative reactivity and reactor power decreased to 93% full power from 98% full power. Subsequent retraction of the ram at a faster rate because of flow assisted withdrawal resulted in reactor power increasing upto 109% full power. Reactor power setback on outlet header and channel outlet temperature very high initiated and subsequently reactor tripped on primary heat transport system low pressure. The event is rated at level 0 on INES.
Justification for rating:
There was unplanned regional increase in radioactivity. Reactor setback on outlet header and channel outlet temperature very high worked and reactor got tripped on PHT system low pressure. All the safety functions were fully available and there was no damage to fuel bundles. So the event has been rated at level 0 on INES.
ERF rating date: 24-01-1996
ERF contact person: MR. V. KUMAR
ERF address: BARC, TROMBAY, India
ERF affiliation: GOVERNMENT OF INDIA, ATOMIC ENERGY REGU, OPERATING PLANTS SAFETY DIVISION, CENTRAL COMPLEX, 4TH FLOOR

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