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Michell Bearings’ unique capability a success for nuclear station blackout

29 June 2021

Michell Bearings has successfully completed station blackout (SBO) tests on a thrust and guide bearing used within the reactor coolant pump at a new-build nuclear power plant.

In what is thought to be one of the world’s first successful bearing run-downs, the test demonstrated the bearing’s ability to survive a station blackout condition without the use of an externally powered high-pressure oil injection system.

Failure of the on-site power generators, concurrent with the loss of off-site power ultimately, results in a station blackout condition as there is no on-site electricity available to power the high-pressure oil injection system.

To meet testing requirements, the bearing must be able to run down to a stop, under full load, and restart without any subsequent intervention.

As part of the contract to supply six thrust and guide bearings, a custom-made test rig was constructed at the Michell Bearings site to satisfy the test conditions...

Read the full article in the July issue of DPA

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