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RO:on 850904,one control blade failed to drop fully into core on demand from 64% withdrawn position.Probably caused by bearings supporting blade/shaft coupling or magnesium shroud housing-to-blade clearance.

Accession Number: ML20132B430

Date Released: Monday, May 25, 2020

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• ML20132B424 - RO:on 850904,one control blade failed to drop fully into core on demand from 64% withdrawn position.Probably caused by bearings supporting blade/shaft coupling or magnesium shroud housing-to-blade clearance. (4 page(s), 9/17/1985)
• ML20132B452 - RO:on 850904,one reactor control blade failed to drop on demand from 64% removed position.Probably caused by binding in clutch S-3 possibly due to moisture or other effect reducing clearance. (3 page(s), 9/4/1985)