05000250/LER-2024-002, 0 for Turkey Point, Unit 3 - Condition Prohibited by Technical Specifications
| ML24102A024 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 04/11/2024 |
| From: | Catron S Florida Power & Light Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| L-2024-057 LER 2024-002-0 | |
| Download: ML24102A024 (1) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 2502024002R00 - NRC Website | |
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U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Re:
Turkey Point Unit 3 Docket No. 50-250 Reportable Event: 2024-02 Date of Event: February 20, 2021 Condition Prohibited by Technical Specifications April 11, 2024 L-2024-057 10 CFR 50.73 The attached Licensee Event Report 2024-02 is being submitted pursuant to the requirements of 10 CFR 50. 73 to provide notification of the subject event.
Attachment cc:
Turkey Point NRC Senior Resident Inspector Turkey Point Station NRC Program Manage Florida Power & Light Company 9760 SW 344th Street, Homestead, FL 33035
Abstract
On February 7, 2021, while in Mode 1, valve 3-759A, 3A Residual Heat Removal Heat Exchanger Outlet Isolation Valve was discovered to have a deficient reach rod gearbox causing it to become inoperable. At the time, due to an incorrect interpretation of Technical Specifications (TSs), the station did not enter TS Action 3.2.1.e which requires two flow paths capable of taking suction from the containment sump. This action requires restoring the inoperable component to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in hot shutdown within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Contrary to this requirement, a condition prohibited by TS occurred on February 11, 2021. There were no Systems, Structures, or Components that were inoperable at the start ofthe event that contributed to the event. This event is being reported pursuant of 10 CFR S0.73(a)(2)(i)(B), Condition Prohibited by TS.
2 2
Description of Event
- 2. DOCKET NUMBER
- 3. LER NUMBER I
00250 D
NUMBER NO.
I YEAR SEQUENTIAL REV
~-I 02 1-0 On February 7, 2021, while in Mode 1, valve 3-759A, 3A Residual Heat Removal Heat Exchanger Outlet Isolation Valve was discovered to have a deficient reach rod gearbox causing it to become inoperable. At the time, due to an incorrect interpretation of Technical Specifications (TSs), the station did not enter TS Action 3.2.1.e which requires two flow paths capable of taking suction from the containment sump. This action requires restoring the inoperable component to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in hot shutdown within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
Contrary to this requirement, a condition prohibited by TS occurred on February 11, 2021.
Cause of Event
Incorrect interpretation of TS.
Safety Significance
Valve 3-759A is a back-up to Motor Operated Valve (MOV) 3-744A, which remained operable during the time 3-759A was inoperable, therefore, there was no actual safety significance related to this event. This event did not prevent any safety systems from performing their safety related functions based on the minimal amount of leakage identified.
This event is being reported pursuant of 10 CFR 50.73(a)(2)(i)(B), Condition Prohibited by TS.
This event did not result in a Safety System Functional Failure.
Corrective Actions
Valve 3-789A was repaired and restored to operable status on March 9, 2024.
Similar Events
A review of events over the past 5 years did not identify any previous events that involved the same underlying cause of the event reported under this Licensee Event Report. Page of