INES-event
INES 0

LEAKOFF IN MOTOR BEARING HEAT EXCHANGER OF SERVICE WATER PUMP

During normal operation of a leakoff in the motor bearing heat exchanger of service water pump was observed mixing coolant water with lubrificating oil of motor bearing. The pump was immediately shutoff and a backup pump was aligned for normal operational mode as requested by Technical Specifications.
BASIS FOR RATING: Although the event is considered with no safety significance it issafety relevant because it involves a safety system. According INES Users'Manual page 14, the event is characterized as minimum requirementsspecified in the operational limits and conditions, reached with normalpassage to fallback state.
DIFFICULTIES IN RATING:

Location: ANGRA-1
Event date: Mon, 14-01-1991
Nuclear event report
Legenda & explanation