ML15259A293
| ML15259A293 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 08/20/2015 |
| From: | NRC/RGN-III |
| To: | NextEra Energy Duane Arnold |
| Zoia, C D | |
| Shared Package | |
| ML15118A361 | List: |
| References | |
| Download: ML15259A293 (3) | |
Text
Appendix D Scenario Outline Form ES-D-1 Facility: Duane Arnold Energy Center Scenario No.: 1 Op-Test No.: 2015301 Examiners: ____________________________ Operators:
Initial Conditions: The plant is operating at 80% power due to a downpour for maintenance.
Thunderstorms are forecast for the area. B SBDG was recently returned from maintenance.
Turnover:
Complete B SBDG Testing per OI 324, SBDG, Section 6.4, synchronize and load.
Raise Reactor power using control rods to a load line of 94-95%.
Event No.
Malf.
No.
Event Type*
Event Description 1
None N BOP Synchronize and load the B SBDG IAW OI 324, Sect 6.4, FAST MANUAL STARTUP OF THE B SBDG SYSTEM.
2 None C BOP TS SRO Report from field that B SBDG has a jacket cooling water leak B SBDG declared inoperable per TS 3.8.1 3
None R ATC Raise reactor power with control rods 4
rd02 3023 C ATC Stuck Control Rod 5
hp01 C BOP TS SRO HPCI spurious start requiring manual shutdown/isolation HPCI declared inoperable per TS 3.6.
7 ed01(a-e) rr15b stdg01 M ALL Loss of Offsite Power with Small break LOCA.
Failure of A SBDG to start in AUTO, will start in Manual.
8 hp02 C BOP HPCI starts in Manual but trips shortly after.
Emergency Depressurization required.
(N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor Appendix D Scenario Outline Form ES-D-1
Facility: Duane Arnold Energy Center Scenario No.: 2 Op-Test No.: 2015301 Examiners: ____________________________ Operators:
Initial Conditions: The plant is operating at 80% power due to a downpower for maintenance.
Thunderstorms are forecast for the area. B CRD pump was recently taken OOS for maintenance.
Turnover:
Start B SBDG for ST after maintenance.
Raise Reactor power recirculation flow.
Event No.
Malf.
No.
Event Type*
Event Description 1
None N BOP Perform MSIV test per STP 3.3.1.1-17 for D MSIVs 2
None R RO R SRO Raise Power with Recirculation Flow to 85% RTP 3
rp02a C BOP TS SRO Trip of RPS MG Set Tech Spec 3.3.8; 3.4.5, A & B & C; TRM 3.3.4 entry 4
rd01 3023 C ATC TS SRO Control Rod Drift (30-23) with AOP 255.1& 255.2 entry Tech Spec entry 3.1.3 5
ed13a C BOP TS SRO 125 VDC Div 1 panel 1D11 trip results in AOP entries Tech Spec entry 3.8.7, Condition B 6
rc08 BOP TS SRO Spurious start of RCIC, requires manually stopping RCIC Tech Spec Entry 3.5.3, Condition A 7
mc04b R RO C BOP Condenser Vacuum Leak (recoverable)
Fast Power Reduction 8
mc04b M ALL Rising backpressure from Event 5 progression necessitates reactor scram. ATWS occurs 9
hp03 I BOP Failure of HPCI controller (complicates RPV level restoration).
(N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor Appendix D Scenario Outline Form ES-D-1
Facility: Duane Arnold Energy Center Scenario No.: 3 Op-Test No.: 2015301 Examiners: ____________________________ Operators:
Initial Conditions:
Reactor power approximately 40%.
Power ascension in progress.
Turnover:
Continue power ascension in accordance with IPOI 3, POWER OPERATIONS (35% - 100%)
RATED POWER, Section 4.0. Steps are completed up to step 5.
Raise power to approximately 50%.
Stabilize power at approximately 50% and perform RCIC pump surveillance test.
Event No.
Malf.
No.
Event Type*
Event Description 1
R ATC Raise power with recirculation flow.
2 rr17a C ATC C SRO A Recirc Pump Speed Controller Failure.
3 nm08c I ATC TS SRO APRM C fails (inoperable).
Tech Spec review (3.3.1.1, 3.3.2.1) 4 N BOP RCIC Start IAW OI 150 5
rc06 sw14a sw14b C BOP TS SRO A RCIC system isolation signal is received due to steam leak; isolation is faulted.
Tech Spec entry (3.5.3) 6 sw19b C BOP C SRO River Water Supply Pump trip.
7 M (ALL)
Large break LOCA occurs (Recirc Pump suction break). Faulted LPCI initiation.
(N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor