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The following information was provided by the licensee via email: At 0050 EST on 3/12/22, while shutting down for entry into a scheduled refueling outage, the station discovered that a single Main Steam Isolation Valve (4A MSIV) did not fully close on demand. All other equipment operated as expected. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v). The NRC Resident Inspector has been notified.

• * * RETRACTION ON 04/26/22 AT 1422 EDT FROM DAVID STOIA TO BRIAN PARKS * * *

The following information was provided by the licensee via email: On 3/12/2022 at 0656 EDT Turkey Point Unit 4 notified the NRC pursuant to 10 CFR 50.72(b)(3)(v)(D) that a single Main Steam Isolation Valve (MSIV) did not fully close when manually demanded from the control room during shutdown of Unit 4 for a refueling outage. Following disassembly and inspection of the MSIV, Florida Power & Light Engineering identified the cause of the deficiency and determined that the valve would have fully seated under its design accident conditions. This notification is a retraction of EN# 55785. The NRC Resident Inspector has been notified of this retraction. Notified R2DO (Miller).