INES-event
INES 2

Boron concentration below specification in borated water storage tanks of 3 out of 4 ECCS trains

After refueling outage in the year 2001 the plant has been started for operation (Aug. 12. 2001) without testing the boron concentration in the borated water storage tanks of the emergency core cooling system. The plant personnel began with first boron concentration tests on 25th of August. On the 27th of Aug. it was recognized that 3 out of 4 trains of the system have not fulfilled the technical specification for the boron concentration on the date when the plant was put in operation. After identification of the deviations the plant personnel did not shutdown the plant but they have taken measures to increase the boron concentration in the water tanks up to the specified value. The incident is characterized by deviations from technical specifications and deficiencies in procedures but also in the safety management of the plant.

Location: PHILIPPSBURG-2
Event date: Mon, 27-08-2001
Nuclear event report
Legenda & explanation