Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 & 2 - Test ... - NRC

1. INTRODUCTION
The aim of this test was to check:
"* That the engine could work for 168 hours with very low load of approximately 85 kWm at 1200
RPM, which represents 3.1 % of the nominal power of 2785 kWm at 1200 RPM or a BMEP of
0.5 bar.
" That at the end of the test it was still possible to increase the power in a relatively short time.
(The m in kWm indicates that the power is mechanical just after flywheel to avoid confusion with
the power just after generator which is electrical and generally written kWe. kWe = kWm *
generator efficiency.)
2. DEVELOPMENT OF TEST
2.1. Incidents
Only one incident occurred.
The engine was stopped by an electrical power cut of the grid after 41 hours of running at very low
load. The engine restarted normally, but a fuel rack was stuck. This fuel rack was quickly freed by
hand, without stopping the engine. It was then decided to lubricate all the fuel racks regularly,
every 8 hours.
The cause of this jamming is probably:
"* Long term storage of the engine
For an engine in-service the recommendation is to lubricate the racks every 6 months. In that case
it should be effective at preventing sticking.
2.2. Evolution of main engine parameters
Nothing abnormal.
Nothing abnormal.
Remarks