| | Site | Start date | Title | Description |
|---|
| WBL-25-026, Periodic Submission for Changes Made to the Technical Specification Bases and Technical Requirements Manual | Watts Bar | 5 June 2025 | Periodic Submission for Changes Made to the Technical Specification Bases and Technical Requirements Manual | |
| ML25094A183 | 05200050 | 22 May 2025 | SDAA - FSER Appendix C - Abbreviations | |
| W3F1-2025-0019, License Amendment Request to Extend Allowable Outage Times for One or More Control Room Air Conditioned Units Inoperable | Waterford | 15 April 2025 | License Amendment Request to Extend Allowable Outage Times for One or More Control Room Air Conditioned Units Inoperable | |
| ML25051A257 | Watts Bar | 1 April 2025 | Issuance of Amendment Nos. 174 and 79 for Revision to Technical Specification 3.7.11 Regarding Two Inoperable Trains of Control Room Emergency Air Temperature Control System | |
| 05000390/LER-2025-001, Loss of the Control Room Emerency Air Temperature Control System Due to Chiller Oil Migration | Watts Bar | 3 March 2025 | Loss of the Control Room Emerency Air Temperature Control System Due to Chiller Oil Migration | |
| 05000391/LER-2025-001, Loss of the Control Room Emergency Air Temperature Control System Due to Chiller Valve Malfunction | Watts Bar | 21 January 2025 | Loss of the Control Room Emergency Air Temperature Control System Due to Chiller Valve Malfunction | |
| CNL-24-076, Response to Request for Additional Information Regarding Application to Modify the Technical Specifications for Main Control Room Chiller Completion Time Extension (WBN-TS-23-13) | Watts Bar | 16 January 2025 | Response to Request for Additional Information Regarding Application to Modify the Technical Specifications for Main Control Room Chiller Completion Time Extension (WBN-TS-23-13) | |
| ENS 57485 | Watts Bar | 4 January 2025 13:55:00 | Inoperability of Both Trains of the Control Room Emergency Air Temperature Control System (CREATCS) | The following information was provided by the licensee via phone and email:
At 0855 EST on 01/04/2025, it was discovered that both trains of the CREATCS were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
At 1408 on 01/04/2025, the 'A' main control room (MCR) chiller was restored to operable following corrective maintenance, and technical specification (TS) limiting condition for operation (LCO) 3.0.3 was exited. The 'B' MCR chiller remains inoperable due to a component outage.
There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The 'A' MCR chiller tripped due to low oil level. LCO 3.0.3 was entered in accordance with TS 3.7.11. |
| ML25010A075 | Browns Ferry
Watts Bar
Sequoyah | 2 January 2025 | January 2 2025 Email from K. Green to S. Hughes, TVA, Re Extension of RAI Response Date for Main Control Room Chiller Extension of Completion Time | |
| ENS 57438 | Watts Bar | 23 November 2024 00:37:00 | Control Room Emergency Air Temperature Control System Inoperable | The following information was provided by the licensee via phone or email:
At 1937 EST on 11/22/2024, it was discovered that both trains of the control room emergency air temperature control system (CREATCS) were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v).
There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified.
The following additional information was obtained from the licensee in accordance with headquarters operations officers report guidance:
Technical specification 3.7.11 conditions A and C were entered as a result of this event. The 'B' train of CREATCS was restored at 0130 EST on 11/23/24 and the plant exited condition C. The 'A' train remained out of service at the time of notification.
Although CREATCS is a common system for both Units 1 and 2, Unit 1 was defueled and outside the mode of applicability during the timeframe of this event. |