05000374/LER-2008-001, High Pressure Core Spray System Declared Inoperable Due to Failed Room Ventilation Supply Fan
| ML082210264 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 08/08/2008 |
| From: | Rhoades D Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RAO8-047 LER-08-001-00 | |
| Download: ML082210264 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(8) 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3742008001R00 - NRC Website | |
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LaSa ~eCeneratwg Stat on wwwex&orcorpcom 260 North 2st Road Nuclear Marsei~es~L61349757 RAO8-047 August 8, 2008 10 CFR 5013 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D~C.20555 LaSalle County Station, Unit 2 Facility Operating License No. NPF 18 NRC Docket No. 50-374
Subject:
Licensee Event Report In accordance with 10 CFR 5013(a)(2)(v)(D), Any event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an event, Exelon Generation Company (EGC), LLC, is submitting Licensee Event Report Number 2008-001-00, Docket No, 50-374.
There are no Regulatory Commitments in this report. Should you have any questions concerning this report, please contact Mr. Terrence W. Simpkin, Regulatory Assurance Manager, at (815) 415-2800.
Respectfully, David P. Rhoades Plant Manager LaSalle County Station
Enclosure:
Licensee Event Report cc:
Regional Administrator - NRC Region Ill NRC Senior Resident Inspector
- - LaSatle County Station
NJRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION 9-2007)
LICENSEE EVENT REPORT (LER)
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APPROVED BY 0MB: NO. 3150-0104 EXPIRES: 08/3112010
, the NRC may not conduct or sponsor, and a person is not required to respond to, the infnrmatinn nnllartinn
- 1. FACILITY NAME LaSalle County Station, Unit 2
- 2. DOCKET NUMBER
- 3. PAGE 05000374 1
OF 3
I. TITLE High Pressure Core Spray System Declared Inoperable Due to Failed Room Ventilation Supply Fan
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITiES INVOLVED MONTH DAY YEAR YEAR SEQUENTiAL F~IEc/ MONTH DAY YEAR FACILITY NAME DOCKET NUMBER N/A N/A 06 11 2008 2008 001 00 08 08 2008 FACILITY NAME DOCKET NUMBER N/A N/A
- 9. OPERATING MODE 1
- 11. THIS REPORTIS SUBMITTED PURSUANTTOTHE REQUIREMENTS OF 10 CFR §: (Checkallthat apply) o 20.2201(b) 0 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 0 50.73(a)(2)(vii) 0 20.2201(d) 0 20.2203(a)(3)(ii) 0 50.73(a)(2)(8)(A) 0 50.73(a)(2)(viii)(A) o 20.2203(a)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(vUi)(B) 0 20.2203(a)(2)Ø)
0 50.36(c)(1)(i)(A) 0 50.73(a)(2)Oii) 0 50.73(a)(2)(ix)(A) 0 20.2203(a)(2)(ii) 0 50.36(c)(1)(ii)(A) 0 50.73(a)(2)(iv)(A) 0 50.73(a)(2)(x) o 20.2203(a)(2)Øii) 0 50.36(c)(2) 0 50,73(a)(2)(v)(A) 0 73,71(a)(4) 0 20.2203(a)(2)(iv) 0 50.46(a)(3)(ii) 0 50.73(a)(2)(v)(B) 0 73.71 (a)(5) o 20.2203(a)(2)(v) 0 50.73(a)(2)(i)(A) 0 50.73(a)(2)(v)(c) 0 OTHER o 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B)
~
50.73(a)(2)(v)(D)
Specify in Abstract below or in This event constitutes a safety system functional failure.
E. CORRECTIVE ACTIONS
The supply fan motor was replaced.
A Service Request will be submitted to perform 20-year replacement/refurbishments of the motors identified in the extent of condition investigation.
Duty cycle classifications for all 480-volt motors will be reviewed and a periodic 480-volt motor time-based refurbishment/replacement will be implemented.
F.
PREVIOUS OCCURENCES
On May 16, 2007, the Unit 2 Rounds Equipment Operator reported an unusually high d/p across the Division 3 Switchgear Room door, making it hard to close. Subsequent investigation found the Division 3 Switchgear Supply Fan not running, while the other Division 3 ventilation fans were running. The fan was successfully re-started per station procedure. No cause could be identified, and the trip was considered spurious.
G. COMPONENT FAILURE DATA
Reliance Nuclear Service 15HP, 1770RPM, 46OVAC, 3PH, 1.0SF, 21AMPS Motor Model Number: 254TCZ Type: P Insulation Class: H Insulation Type: RH Serial Number: 1YF882360A3 SCPRINTED ON RECYCLED PAPER