05000443/LER-2005-008, Regarding Technical Specification Violation Due to Inoperable Instrument Bus Inverter

Regarding Technical Specification Violation Due to Inoperable Instrument Bus Inverter

ML060030475
Person / Time
Site:	Seabrook
Issue date:	12/28/2005
From:	Kiley M Florida Power & Light Energy Seabrook
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
SBK-L05272 LER 05-008-00
Download: ML060030475 (5)

LER-2005-008, Regarding Technical Specification Violation Due to Inoperable Instrument Bus Inverter

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2) 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)(v), Loss of Safety Function
4432005008R00 - NRC Website

text

FPL Energy Seabrook Station FPL Energy P.O. Box 300 Seabrook, NH 03874 Seabrook Station (603) 773-7000 DEC 28 2005 Docket No. 50-443 SBK-L-05272 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Seabrook Station Licensee Event Report (LER) 2005-008-00 for Noncompliance with the Technical Specifications Due to Inoperable Instrument Bus Inverter Enclosed is Licensee Event Report (LER) 2005-008-00. This LER reports an event that occurred at Seabrook Station on November 30, 2005.

This event is being reported pursuant to the requirements of 10 CFR 50.73(a)(2)(i)(B).

Should you require further information regarding this matter, please contact Mr. James M.

Peschel, Regulatory Programs Manager, at (603) 773-7194.

Very truly yours, FPL ENERGY SEABROOK, LLC Michael W. Kiley Station Director cc:

S. J. Collins, NRC Region I Administrator G. E. Miller, NRC Project Manager, Project Directorate 1-2 G. T. Dentel, NRC Senior Resident Inspector an FPL Group company

ENCLOSURE TO SBK-L-05272

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 0613012007 (62004)

, the NRC may digits/characters for each block) not conduct or sponsor. and a person Is not required to respond to, the

3. PAGE Seabrook Station 05000 443 1 OF 3

4. TITLE Technical Specification Violation due to Inoperable Instrument Bus Inverter

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED I

FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR N/A 05000 MONT DAYA YA NUMBER NO.

FACILITY NAME DOCKET NUMBER

_1 30 2005 2005 - 008 -

00 12 28 2005 N/A 05000

9. OPERATING MODE

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply) 0 20.2201(b) 0 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 0 50.73(a)(2Xvii) 1 0 20.2201(d) 0 20.2203(a)(3)(ii) 0 50.73(a)(2)(iiXA) 0 50.73(a)(2)(viii)(A) 0 20.2203(a)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(viii)(B) 0l 20.2203(a)(2)(i) 0 50.36(c)(1)(iXA) 0 50.73(a)(2)(iil) 0 50.73(a)(2Xix)(A)

10. POWER LEVEL 0 20.2203(a)(2Xii) 0 50.36(cX1)(ii)(A)

E 50.73(a)(2)iv)(A) 0 50.73(a)(2Xx) o 20.2203(a)(2Xiii) 0 50.36(cX2) 0 50.73(aX2)(v)(A)

E 73.71(a)(4) o0 20.2203(a)(2Xiv) 0 50.46(a)(3Xii)

E 50.73(aX2)(v)(B)

E 73.71 (a)(5) 100 0 20.2203(a)(2Xv) 0 50.73(a)(2Xi)(A) 0 50.73(aX2)(v)(C)

El OTHER 0 20.2203(a)(2Xvi) 0 50.73(a)(2Xi)(B)

El 50.73(a)(2)(v)(D)

Specify In Abstract below or in (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17)

This event is of regulatory significance because it met the reporting criteria of 10 CFR 50.73 (a)(2)(i)(B) for a condition prohibited by the TS. The event was reported to the NRC on November 30, 2005 at 1714 (event # 421784) in accordance with the Facility Operating License Condition 2.G as a violation of the TS.

No consequences resulted from this event and, therefore, the event had no adverse impact on the plant or on the health and safety of the public. This condition did not involve a Safety System Functional Failure and no inoperable structures, systems, or components contributed to this event.

lV.Corrective Action Inverter IF was repaired and returned to service on November 30, 2005 at 1522.

On December 6, 2005 FPL Energy Seabrook submitted License Amendment Request (LAR) 05-11 to extend the allowed outage time detailed in TS 3.8.3.1. action b for Inverters lE and IF from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to seven days.

V. Additional Information

At the time of this report it is unknown what caused the failure of the circuit card to perform its intended function. As part of the equipment failure analysis, the circuit cards removed from Inverter IF have been sent to Elgar for analysis. A Root Cause of the event is also being performed.

The Energy Industry Identification System (ELIS) codes are included in this LER in the following format: [EIIS system identifier, EUS component identifier].

Similar Events

Seabrook Station has had no similar events involving inverter failure.