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Abnormal Occurrence 50-289/75-10:on 750410,reactor criticality at 505 F.Caused by procedural inadequacies.Plant Operations Review Committee recommended update of fuel reactivity versus core burnup & procedural revisions.

Accession Number: ML19262A223

Date Released: Thursday, October 3, 2019

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• ML19262A222 - Abnormal Occurrence 50-289/75-10:on 750410,reactor criticality at 505 F.Caused by procedural inadequacies.Plant Operations Review Committee recommended update of fuel reactivity versus core burnup & procedural revisions. (4 page(s), 4/21/1975)
• ML19262A228 - Abnormal Occurrence 75-10:on 750409,reactor criticality at 505 F primary coolant temp.Caused by lack of detailed calculational guidance in boron concentration control operating procedure.Reactor made subcritical. (2 page(s), 4/10/1975)