Semantic search
| Site | Start date | Title | Description | |
|---|---|---|---|---|
| CNL-20-058, Tennessee Valley Authority, Application to Modify the Watts Bar Nuclear Plant Unit 1 and Unit 2 Technical Specifications for Function 6.e of Table 3.3.2-1, Engineered Safety Feature Actuation System Instrumentation (WBN-TS-19-27) | Watts Bar | 27 August 2020 | Tennessee Valley Authority, Application to Modify the Watts Bar Nuclear Plant Unit 1 and Unit 2 Technical Specifications for Function 6.e of Table 3.3.2-1, Engineered Safety Feature Actuation System Instrumentation (WBN-TS-19-27) | |
| ML20153A362 | Watts Bar | 22 June 2020 | Summary of May 27, 2020, Teleconference Call with Tennessee Valley Authority Regarding a Planned License Amendment Request for Watts Bar Nuclear Plant, Units 1 and 2 | |
| ML20148M145 | Watts Bar | 27 May 2020 | (Wbn)Proposed License Approach Regarding a Change for the WBN Units 1& 2 Technical Specification (TS) 3.3.2 Table 1 Function 6.e Auxiliary Feedwater Auto-Start from Loss of Main Feedwater Pumps | |
| ML18029A643 | Millstone | 27 November 2017 | Final Written Examination with Answer Key (401-5 Format) (Folder 2) | |
| ML17334A157 | Watts Bar | 2 November 2017 | Amendment 1 to Updated Safety Analysis Report, Chapter 10, Main Steam and Power Conversion Systems | |
| ML18074A364 | Millstone | 7 September 2017 | Draft Written Exam (Folder 2) | |
| 05000391/LER-2017-003 | Watts Bar | 23 March 2017 22 May 2017 | Automatic Start of Auxiliary Feedwater System Due to Main Condenser Failure LER 17-003-00 for Watts Bar, Unit 2, Regarding Automatic Start of Auxiliary Feedwater System Due to Main Condenser Failure | On March 23, 2017, at 0014 Eastern Daylight Time (EDT), Watts Bar Nuclear Plant Unit 2 experienced an unplanned trip condition of both Turbine Driven Main Feed Pumps (TDMFPs) following a loss of Main Condenser Vacuum. The trip of both TDMFPs caused an automatic start of both Motor Driven Auxiliary Feed Water Pumps and the Turbine Driven Auxiliary Feed Water Pump as designed. The plant was performing a normal startup, and had just synchronized the main generator to the grid. Subsequent to the event, the plant was transitioned to Mode 3 by inserting all control rods with a manual trip. All plant safety systems operated as expected. The loss of condenser vacuum was the result of a significant breach of the Unit 2 main condenser - B zone. This failure is attributed to the main condenser neck support structural design being inadequate to maintain integrity within specification. Repairs to the condenser will be completed prior to Unit 2 returning to service. |
| ENS 52630 | Watts Bar | 23 March 2017 04:14:00 | Automatic Start of Auxiliary Feed Water | On March 23, 2017, at 0014 EDT, Watts Bar Nuclear Plant Unit 2 (WBN2) experienced an unplanned trip of both Turbine Driven Main Feed Pumps (TDMFP) following a loss of Main Condenser Vacuum. The trip of both TDMFPs caused an automatic start of both Motor Driven Auxiliary Feed Water Pumps and the Turbine Driven Auxiliary Feed Water Pump. (The) cause of the loss of Main Condenser Vacuum is currently under investigation. The plant was performing a normal startup, and had just synced the main generator to the grid. Subsequent to the event, the plant was transitioned to Mode 3. All rods are fully inserted. Decay heat is being removed via the atmospheric relief valves. Unit 1 remains in Mode 5 for a refueling outage. The licensee has notified the NRC Resident Inspector. |
| ML16257A721 | Watts Bar | 13 September 2016 | Initial Exam 2016-301 Final SRO Written Exam - Delay Release 2 Years | |
| IR 05000336/2016001 | Millstone | 4 May 2016 | Integrated Inspection Report 05000336/2016001 and 05000423/2016001, and Notice of Violation, 01/01/2016 - 03/31/2016 |