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Submits info re util review of potential for boron dilution accident requested by NRC 770915 ltr.Operating procedures changed to require closing of valve CA49 in addition to CA61 & CA62 during sodium hydroxide control valve testing.

Accession Number: ML19326C335

Date Released: Tuesday, March 2, 2021

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• ML19326C333 - Submits info re util review of potential for boron dilution accident requested by NRC 770915 ltr.Operating procedures changed to require closing of valve CA49 in addition to CA61 & CA62 during sodium hydroxide control valve testing. (3 page(s), 12/22/1977)
• ML19326C341 - Requests analysis of potential for consequences of boron dilution accident.Response should include proposals for design or procedural corrective actions if required to preclude accident or to mitigate accident consequences. (3 page(s), 9/15/1977)