ML22115A157
| ML22115A157 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/24/2022 |
| From: | Chuck Zoia NRC/RGN-III/DRS/OLB |
| To: | FirstEnergy Nuclear Operating Co |
| Zoia C | |
| Shared Package | |
| ML20140A252 | List: |
| References | |
| Download: ML22115A157 (3) | |
Text
Appendix D Scenario Outline Form ES-D-1
Facility: Davis-Besse Scenario No. 1 Op Test No.: DB1LOT22
Examiners: Operators: SRO ATC BOP
Initial Conditions: 100% Power
Turnover: Maintain 100% Power
Planned: Shift Routines
Critical tasks:
- 1. Close the Pressurizer Spray Valve and PORV Block Valve
- 2. Restore RCP Seal Return
Event Malf. Event Type* Event No. No. Description
1 (N) ATC Place Purification Demin 3 I/S per Chemistry request 2 (I) ATC Leaking Power Operated Relief Valve (PORV) (TS) 3 (C) BOP Trip TPCW Pump 1 Hi Bearing Temp / Start STBY pump
4 Inverter YV1 DC input failure (TS)
5 (R) ATC/(C) BOP TPCW Pump 2 trips / Lower power to capacity of 1 pump
6 Major Steam Leak in CTMT / Trip Reactor 7 (C) BOP AFP 1 Trips - Start the MDFP
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor
NUREG-1021, Revision 11 Page 1 of 22 Appendix D Scenario Outline Form ES-D-1
Facility: Davis-Besse Scenario No.: 2 Op Test No.: DB NRC 2022
Examiners: Operators: SRO ATC BOP
Initial Conditions: 100% Power
Turnover: Maintain 100% Power
Planned: Shift routines
Critical tasks:
- 1. Shutdown Reactor - ATWS
- 2. Isolate Overcooling Steam Generators
Event Malf. Event Type* Event No. No. Description
1 (C) ATC Weekly Run of the Standby Makeup Pump 2 Oil Pumps (TRM)
2 (C) BOP Main Feedwater Pump Turbine 1 High Drain Tank Level 3 (C) BOP Swap SFP Pumps due to high bearing temp/vibration 4 (R) ATC / BOP Dropped Control Rod - Reduce Reactor Power (TS) 5 Major Main Generator Lockout - ATWS
6 (C) BOP Stuck Open Main Steam Safety Valve - Overcooling
7 (C) BOP Steam Feed Rupture Control System fails to automatically align for a low pressure trip on Steam Generator 1
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor
NUREG-1021, Revision 11 Page 1 of 20 Appendix D Scenario Outline Form ES-D-1
Facility: Davis-Besse Scenario No.: 3 Op Test No.: DB NRC 2022
Examiners: Operators: SRO ATC BOP
Initial Conditions: 60% Power
Turnover: Shutdown Main Feedwater Pump1 to 1000 RPM Auxiliary Feedwater Pump 1 Out of Service
Planned: Complete the Shutdown of Main Feedwater Pump 1
Critical tasks:
- 1. Trip all 4 RCPs
- 2. Initiate High Pressure Injection Cooling
Event Malf. Event Type* Event No. No. Description
1 (N) BOP Remove Main Feedwater Pump 1 from service 2 (C) ATC / BOP Component Cooling Water Pump 2 Trips (TS) 3 Bus F7 Failure / Motor Driven Feedwater Pump Inop (TS)
4 (C) BOP Station Air Compressor 2 setpoint failure - Low air header pressure
5 (R) ATC Rising Main Condenser Pressure - Reduce Reactor Power (C) BOP Trip the Main Generator
6 Major Trip the Reactor - Initiate / Isolate Steam Feedwater Rupture Control system
Auxiliary Feedwater Pump 2 Trips - Emergency Feedwater 7 (C) ATC/BOP Pump does not start - Loss of All Feedwater Standby Makeup Pumps fails to start - Makeup / High Pressure Injection / PORV Cooling
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor
NUREG-1021, Revision 11 Page 1 of 18