ML13114A746
| ML13114A746 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 04/29/2013 |
| From: | Mcneil D NRC/RGN-III/DRS/OLB |
| To: | Exelon Generation Co |
| References | |
| 50-454/13-301, 50-455/13-301 | |
| Download: ML13114A746 (3) | |
Text
Appendix D Scenario Outline Form ES-D-1 Facility: _Byron Nuclear Station Scenario No.: __1__ Op-Test No.: _2013301_
Examiners: _D. McNeil__________________ Operators: _____________________________
_R. Baker___________________ _____________________________
_B. Palagi_________________ _____________________________
Initial Conditions: __IC-22____________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Turnover: Unit 1 is at 100% power, steady state, equilibrium xenon, MOL. Unit output is 1230 MW. ___
Boron concentration is 888 ppm. Online risk is green. A TV/GV surveillance is scheduled to be ___
performed. The unit will be ramped to 89% power at 3MW/min for the surveillance._______________
Event Malf. No. Event Type* Event No. Description Preload IMF RP26C ESF relay failure of 1A RH pump IMF RP28C ESF relay failure of 1B RH pump Trgset 4 zdi1fw012c(1).gt.0 Trg 4 dor zlo1fw012c1 Trgset 5 fwv1fw012c.gt.0.9 Trg 5 ior zlo1fw012c1 off 1 R (RO) (SRO) N Ramp down for TV/GV Surveillance (BOP, SRO) 2 IMF PA0253 ON TS (SRO) S/G PORV 1MS018A Inop IOR ZDI1MS018A CLS 3 IMF FW16 0 I (BOP, SRO) 1PT508 fails low 4 IMF CV10 200 180 134 C (RO, SRO) 1CV121 slowly fails open. Manual control is available.
5 IMF RX10A 0 30 I (RO, SRO) TS 1PT 505 fails low (SRO) 6 ED11D TS (SRO) Loss of IB 114 due to a bus fault.
Tech Spec 3.8.9 required shutdown within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 7 Ramp fwv1FW012C 1 1 C (BOP, SRO) 1FW012C recirc fails open 08:00:00 8 MF TH04C 540000 M (all) LB LOCA terminating in transfer to Cold Leg Recic 9 Pre-load C (all) ESF relay failure of 1A & B RH pumps
- manual start required
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor
Appendix D Scenario Outline Form ES-D-1 Facility: _Byron Nuclear Station Scenario No.: __2__ Op-Test No.: _2013301_
Examiners: _D. McNeil__________________ Operators: _____________________________
_R. Baker___________________ _____________________________
_B. Palagi__________________ _____________________________
Initial Conditions: __IC-22, 75% power, steady state, MOL___________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Turnover: Unit 1 is at 76% power, steady state, MOL, CB D is @ 141 steps and boron concentration is 998 ppm.. Online risk is green. Crew is to switch Bus 156 from SAT to UAT following ACB 1561 ____
maintenance. 1D CD/CB pump is OOS for maintenance..____________________________________
Event Event Malf. No. Event Type*
No. Description ZDI 1CD05PD PTL ZLO1CB113DOPN OFF ZLO1CB113DCLS OFF ZDI1CB113D CLS Turbine fails to AUTO trip from Rx trip Preload ZDI1CD05PDB PTL Manual Turbine trip PB fails to trip IMF RP02A turbine IMF RP02B IMF TC03 ZDIHSTG010 NORM 1 N (BOP,SRO) Switch Bus 156 Electrical Lineup TS (SRO) Notified that SI pump failed ASME 2 None surveillance C (BOP,SRO) 1C CD/CB pp Trip requiring entry to 3 IMF FW22C R 1BOA SEC-1 and Turbine Runback (RO, SRO)
I (RO, SRO) TS 4 MF RX18A 630 1A TCOLD RTD Fail High (SRO)
Feedwater flow channel 1FT-521 fails 5 IMF RX04D 0 30 I (BOP,SRO)
Low 6 MF CV16 0 I (RO, SRO) VCT Level Channel LT-112 Fail Low 7 MF CH08 60 120 TS (SRO) CNMT Pressure 1PT-936 Fail High ATWS 8 MF TH16C M (ALL) 1C RCP Trip with Rx Trip Breakers Fail To Open Failure of Main Turbine to Trip on 9 Pre-load C (ALL) auto signal or manual push button
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor
Appendix D Scenario Outline Form ES-D-1 Facility: _Byron Nuclear Station Scenario No.: __3__ Op-Test No.: _2013301_
Examiners: _D. McNeil__________________ Operators: _____________________________
_R. Baker___________________ _____________________________
_B. Palagi__________________ _____________________________
Initial Conditions: __IC-16, 56% power, steady state, equilibrium xenon, BOL____________________
_________________________________________________________________________________
_________________________________________________________________________________
Turnover: Unit 1 is at 56% power, steady state, equilibrium xenon, BOL CB D is at XXX steps and boron concentration is 998 ppm. Preconditioned to 100% power at 6400 EFPH. Online risk is yellow. 1A CS pp is O.O.S. for a motor lube oil change and is scheduled to be released at the end of shift. It is expected that Power Team will call for the unit to be ramped to 880 MWe at 0.2MW/min.____________________
Event Event Malf. No. Event Type*
No. Description Preload IOR ZDI1CS01PB PTL Preload 1A CS pp O.O.S.
IRF CS05 OVER Prevents 1B CS pp from Auto start IMF CH01B 1B RCFC fails to start in Lo Speed IMF CH01C 1C RCFC fails to start in Lo Speed 1 None (from 10-1-5 cert) N (BOP, SRO) Ramp unit up R (RO, SRO) 2 IMF RD13AK08 TS (SRO) DRPI failure (1 rod) in CB A for 1 train 3 MF CV07A 80 60 C (RO, SRO) RCP Seal Injection Filter Clogged 4 MF RX13A 100 I (RO, SRO) TS Pzr LT-459A Fail High (controlling (SRO) channel) 5 IMF FW02A C (BOP, SRO) 1B TDFP Trip with 1A MFP available for manual start 6 IMF RX01K 0-(from 10-1-1 I (BOP, SRO) Steam Generator 1D controlling cert) TS (SRO) Steam Pressure channel fails low requiring Manual control of 1D SG Main Feed Reg Valve. Enter Tech Spec 3.3.2 for actions.
7 MF MS07D 4 240 M (ALL) 1D Steam Line Break inside CNMT 8 (Preloaded) C (SRO, CS Pumps Auto Start Failure, Manual MF CS01A CREW) Start required; 1A CS pump fail to RF CS05 OVER start.
IMF CH01B IMF CH01C 1B RCFC fails to start in Lo Speed 1C RCFC fails to start in Lo Speed
- (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor