05000389/LER-2008-002, For St. Lucie, Unit 2, Regarding Unit 2 Manually Tripped as a Result of Maintenance
| ML082250254 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 08/04/2008 |
| From: | Johnston G Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2008-171 LER 08-002-00 | |
| Download: ML082250254 (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)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 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)(A), Loss of Safety Function - Shutdown the Reactor 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 |
| 3892008002R00 - NRC Website | |
text
0 FPL Florida Power & Light Company, 6501 S. Ocean Drive, Jensen Beach, FL 34957 August 4, 2008 L-2008-171 10 CFR 50.73 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Re:
St. Lucie Unit 2 Docket No. 50-389 Reportable Event: 2008-002 Date of Event: June 4, 2008 Unit 2 Manually Tripped As Result of Maintenance Activities The attached Licensee Event Report 2008-002 is being submitted pursuant to the requirements of 10 CFR 50.73 to provide notification of the subject event.
Verýr truly yours, Gohdon L. ohnston 6n It' Site Vice President St. Lucie Plant GLJ/dlc Attachment A44i~
an FPL Group company
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 08/31/201R (9-2007)
Estimated burden per response to comply with this mandatory collection request: 50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br />. Reported lessons learned are incorporated into the licensing process and fed back to industry. Send comments regarding burden estimate to the Records and FOIA/Privacy Service Branch (T-5 LICENSEE EVENT REPORT (LER)
F52), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by internet e-mail to infocollects@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 13. PAGE St. Lucie Unit 2 05000389 1
OF 3
- 4. TITLE Unit 2 Manually Tripped As A Result of Maintenance
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL I REV MONTH DAY YEAR FACILITYNAME DOCKET NUMBER NUMBER NO.I l
[
I FACILITY NAME DOCKET NUMBER 06 04 2008 2008 -
002 -
00 08 04 2008N
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)
El 20.2201(b)
El 20.2203(a)(3)(i)
El 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii)
El 20.2201(d)
[] 20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A)
El 50.73(a)(2)(viii)(A)
El 20.2203(a)(1)
El 20.2203(a)(4)
El 50.73(a)(2)(ii)(B)
El 50.73(a)(2)(viii)(B)
El 20.2203(a)(2)(i)
El 50.36(c)(1)(i)(A)
El 50.73(a)(2)(iii)
EL 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2)(ii)
El 50.36(c)(1)(ii)(A) 0 50.73(a)(2)(iv)(A)
El 50.73(a)(2)(x)
El 20.2203(a)(2)(iii)
El 50.36(c)(2)
El 50.73(a)(2)(v)(A)
El 73.71(a)(4) 00 20.2203(a)(2)(iv)
El 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B)
El 73.71 (a)(5) 100%
El 20.2203(a)(2)(v)
El 50.73(a)(2)(i)(A)
El 50.73(a)(2)(v)(C)
El OTHER El 20.2203(a)(2)(vi)
El 50.73(a)(2)(i)(B)
El 50.73(a)(2)(v)(D)
Specify in Abstract below or in
Corrective Actions
The corrective actions and supporting actions are entered into the site corrective action program.
Any changes to the proposed actions will be managed under the commitment management change program.
Immediate Corrective Actions
" Performed stand-down and Human Performance walkdown with crews.
- Implemented the requirement during FIN work activities to have a risk review performed prior to implementation.
Corrective Actions
- 1. Develop specific procedural direction for controlling energized leads during all work evolutions and provide direction for the use of the risk management process.
- 2.
Design and implement modifications to address vulnerability when performing maintenance on the level switches.
- 3.
Evaluate and incorporate industry best practices for handling all
- leads, include training plan.
- 4.
Revise the preventive maintenance strategy which mitigates setpoint drift or implement design change to replace the main feedwater pump suction pressure switches.
Similar Events
A search of the corrective action database for St. Lucie was performed to identify
ýevents related to manipulation of energized wires. One condition report (CR 96-2772) with similar concerns was found in which during maintenance on a level switch, leads were shorted which de-energized a portion of feedwater heater level control system, resulting in lifting feedwater heater safety reliefs and resulting in a significant plant transient.
Failed Components 20 amp fuse on the 120V Vital AC 2B panel circuit Degraded Components Feedwater (FW)
Heater High Level Limit Switch LS-11-26B