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: Fri, 02-04-1993
ERF description: Palo Verde Unit 2 was operating at 98 percent power. At 0435, operators noticed a decrease in pressurizer pressure and level. Although additional charging flow was started, pressurizer level and pressure continued to decrease. The operators manually scrammed the reactor at 0447. Safety injection and containment isolation signals automatically initiated. After determining that a steam generator tube rupture existed, operators began to cool down and depressurize the reactor coolant system. The leak rate was estimated to be approximately 15 l/s (240 gal/min.). The release patchway through the steam jet air ejector was filtered and monitored. At 0728, the affected steam generator was isolated. Sometime after 0800, leakage was minimized when reactor coolant system pressure was reduced to match secondary system pressure. Field surveys outside the plant indicated dose rate readings no higher than background.
ERF rating date: 31-03-1993
ERF contact person: DENWOOD ROSS
ERF address: WASHINGTON, D.C. 205, United States
ERF affiliation: USNRC, M/S MNBB-3701

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