In a nuclear power plant, 25,000 litres of fuel leaked from a tank (containing 100,000 litres in total) following the malfunctioning of a gauge and other checking devices. The spill polluted 8 km of the river TAGE and was retained by a small oil boom. About hundred members of the Spanish civil protection department participated in the clean up operations using pumps, oil booms and chemicals solidifying fuel.

These operations were scheduled for two days. The local authorities prohibited the consumption of water from the river and its use for farming. The Spanish environmental authorities carried out tests to measure the extent and gravity of pollution.