ML030790354
| ML030790354 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 10/23/2002 |
| From: | Nuclear Management Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0094 | |
| Download: ML030790354 (13) | |
Text
PRELIMINARY 2
EVENT TIMELINE 10/23/02 S0400
- P-38A OOS for scheduled maintenance - TSAC entered SDay Shift - Maintenance performed on P 38A AFW Pump m AF-38 valve replacement n AF-4012-O diaphragm change
- P-38A seal replacement m ICP 6.086 flow calibration Committed to Nuclear Excellence B
EVENT TIMELINE 10/24/02 S0110
- Commenced IT-10 S0159
- Started P-38A S0212
- Secured P-38A
- Indicated flow was 64.5 gpm
"* Acceptance criteria was 70 gpm S0215-0500
- I&C contacted and flow transmitter was revented and recalibrated; ran P-38A and flow still only 65 gpm Committed to Nuclear Excellence 2
.M EVENT TIMELINE 10/24/02 0323 - CAP029908 initiated on inadequate recirculation flow
> 0400 - Engineering contacted; Operations informed pump is OK and investigation will begin
> 0500-0700 - Engineering postulated potential failure modes
> 0630 - BOP/NSSS Engineering Supervisor designated lead for issue NuMClrce Committed to Nuclear Excellence 3
EVENT TIMELINE 10/24/02 0830 - Meeting with Engineering, Maintenance, Shift Manger m Action plan established to investigate S1030
- Installed UT flow meter on recirc line and ran P-38A; installed FE indicates 65 gpm and UT indicates 60 gpm S1100-1300 - RO disassembled and found to have rust-like particles blocking some orifice holes (24 of 54 outer holes had
, some degree of blockage)
Committed to Nuclear Excellenc 4
P
EVENT TIMELINE 10/24/02 1100-1300 cont. - Boroscope inspection of upstream piping shows no evidence of FME S1700
- 50.59 screening completed for temp change to IT-10 acceptance criteria S1830 Meeting with Shift Manager, Maintenance, and Engineering to review plans Committed to Nuclear Excetlence 5
liiu
EVENT TIMELINE 10/24/02 S>2115-2117
- Ran P-38A per OI-62A m Flow was 75 gpm
- Evening - CST/AFW samples normal Nucl Committed to Nuclear Excellencr 6
I
EVENT TIMELINE 10/25/02
- 0008-0050 - Ran P-38A per IT-10
- 0155 - Commenced IT-10C for P-38A
- 0216 - P-38A RTS and TSAC exitied
> 1030 - ACE initiated to evaluate inadequate flow
- 1600- Operations requests short term action plan from Engineering by 11/1 NMcr Committed to Nuclear Excellence 7
EVENT TIMELINE 10/28102 1100 - Engineering held meeting to brainstorm problem
"* What is material
"* Origin, of material
"* Pump tolerances
"* SW strainer size
"* Previous silt study
"* Obtain details of RO Afternoon - Operations and Engineering Committed to Nuclear Excellenc$ management briefed on issue 8
EVENT TIMELINE 10/29/02
> 0900 - Meeting with Engineering Director
"* Conclude system operation would be adversely affected by SW plugging RO
"* Licensing and Operations briefed
> 0945 - Management Meeting identified immediate actions to be taken
"* Crew briefings
"* NRC notifications
.* Procedure changes (102)
NMC-r-C9 Commf oo Nuclea,.r*
Exelnc Temporary information tags 9
EVENT TIMELINE 10/29/02 S1027
- Declared all 4 AFW pumps OOS S1110
- Crew briefed on AFW recirc flow issue S1210
- Posted temporary information tags for all 4 AFW pumps Secure pumps if rmn flow not maintained S1241
- CAP029952 initiated on potential common mode failure of AFW recirc lines S1305
- All 4 AFW pumps RTS based on NMC compensatory measures taken Committed to Nuclear Excellene 10 r s
EVENT TIMELINE 10/29/02 me NMCl Commire'ed to Nucle E*cefence 1410 - Engineering Director forms RCE Team
"* RCE expertise
"* AFW System Engineer
"* KNPP Design Engineer S1525
- Need for OD discussed between Engineering and Operations S1530-1630
- Simulator runs performed to evaluate effect of compensatory measures on risk lp 11
EVENT TIMELINE 10/29/02
- 1711 - NRC 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> notification made
> 1830 - Operations request an operability determination for CAP029952
)-2030 - Safety Monitor transitions to Yellow based on PRA Group input NMcc1 Committed to Nuclear Excellence*
12
r EVENT TIMELINE 10/30/02
> 0700 - Initial RCE Team Meeting S1030
- Qualifications suspended for 3 individuals
> 1100- Notified on NRC Special inspection
> 1250 - RCE Charter Approved
> 1850- Operability Determination approved and accepted by Operations Committed to Nuclear Excellence 13