ENS 55522

v t e ENS Event
17:20 Oct 14, 2021
Title	Traversing IN-CORE Probe a Ball Valve Inoperable
Event Description	At 1320 EDT, during a Traversing In-Core Probe (TIP) run for a scheduled Local Power Range Monitors (LPRM) calibration, it was reported to the Main Control Room that TIP A would not fully retract to the In-Shield position. With TIP A unable to fully retract to the In-Shield position the TIP A Ball Valve was declared Inoperable due to not being able to close and meet its safety function in that configuration. Furthermore the TIP A Shear Valve was previously declared Inoperable due to the Firing Fuses being removed. With the two valves Inoperable the penetration could not be isolated and Primary Containment boundary isolation could not be established. TIP A was subsequently manually hand cranked and placed back into its In-Shield position at 1333 EDT restoring TIP A Ball Valve Operable. This report is being made pursuant to 10CFR50.72(b)(3)(v)(C) based on control the release of radioactive material. The Senior NRC Resident Inspector has been notified.

ENS 55522 +/-
Where
Fermi Michigan (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Time - Person (Reporting Time:+2.12 h0.0883 days <br />0.0126 weeks <br />0.0029 months <br />)
Opened:	Nikolas Schafer 19:27 Oct 14, 2021
NRC Officer:	Bethany Cecere
Last Updated:	Oct 14, 2021
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v • d • e

v t e Emergency Notification System
Fermi with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2021-10-14T17:20:00 [Table view]
[ENS list for Fermi]

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