On 5 March 1999, a security officer discovered a suspicious object within the plant protected area. The licensee treated the object as if it was a bomb, and declared an ALERT emergency classification. An explosive ordinance disposal unit responded to the plant, and determined that the object was not a bomb. Justification: This event is rated as out of scale in accordance with Part I-1.3 of the INES Users Manual, as it did not involve any possible radiological hazard and did not affect the safety layers.
Location: SAN ONOFRE-2 Event date: Fri, 05-03-1999