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The following information was provided by the licensee via email: The plant is in a safe configuration. On June 3, 2022, isolated pressure fall (IPF) and isolated pressure rise (IPR) tests were completed satisfactory on manifold 1. A satisfactory Item Relied on For Safety (IROFS) surveillance was completed for manifold 1 and 1003 Autoclave was placed in service. On June 7, 2022 during the disconnect of 1003 Autoclave, an Operator noticed a white/yellowish film on the hex nut of the manifold and the upper portion of the cylinder valve. The Operator surveyed the film and found 4,000 to 6,000 dpm alpha and beta contamination. Prior to opening the door of 1003 Autoclave, the internal atmosphere was sampled for hydrogen fluoride (HF). No HF was detected by HF monitor. 1003 Autoclave has been taken out of service. Autoclave sampling manifold 1 has been isolated and IROFS 28 declared INOPERABLE. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: No employee exposures occurred. The leakage was contained inside the autoclave.

• * * RETRACTION ON 06/10/22 AT 1411 EDT FROM BARRY LOVE TO THOMAS HERRITY * * *

The following was provided by the licensee via email: The IROFS28 boundary, components, associated accident sequences and manifold leak were evaluated by Urenco-USA (UUSA) engineering. The evaluation determined that the leakage from the manifold did not result in IROFS28 being inoperable. IROFS28 was determined to be operable during this event. Based on this reevaluation, UUSA is retracting event notification EN 55930. UUSA will be notifying Region II. Notified R2DO (Miller), and NMSS (Clark), NMSS Day (Rivera-Capella), NMSS Events (email).