ML12199A222

Part 21- Failed Auxiliary Contactor Affecting Diesel Generator

ML12199A222
Person / Time
Site:	Fort Calhoun
Issue date:	07/11/2012
From:	Matzke E Omaha Public Power District
To:	Office of Nuclear Reactor Regulation
References
48089
Download: ML12199A222 (3)

Text

07/111/2012 U.S. Nuclear Regulatory Commission OperationsCenter Event Report PazelI Power Reactor Event# 48089 Site: FORT CALHOUN Notification Date I Time: 07/11/2012 10:14 (EDT)

Unit: 1 Region: 4 State : NE Event Date / Time: 02/12/2012 14:54 (CDT)

Reactor Type: (1) CE Last Modification: 07/11/2012 Containment Type: DRY AMB NRC Notified by: ERICK MATZKE Notifications: ART BURRITT R1DO HQ Ops Officer: DONG HWA PARK ALAN BLAMEY R2DO Emergency Class: NON EMERGENCY ERIC DUNCAN R3DO 10 CFR Section: MARK HAIRE R4DO 21.21 (d)(3)(i) DEFECTS AND NONCOMPLIANCE PART 21 GROUP Unit Scram Code RX Crit Init Power Initial RX Mode Curr Power Current RX Mode 1 N No 0 Cold Shutdown 10 Cold Shutdown PART 21 - FAILED AUXILIARY CONTACTOR AFFECTING DIESEL GENERATOR "On February 10, 2012, during the monthly testing of Diesel Generator 1 (DG-1), speed was raised from 500 RPM to 900 RPM. At approximately 750 RPM, the generator field did not 'flash', a term used to describe the normal voltage buildup in the field of a generator. Initial troubleshooting identified that the auxiliary contacts on the 2CR contactor did not close. This caused the field flash failure. The failure of the auxiliary contacts on the 2CR contactor prevented the diesel generator from performing its designed safety function. The specific part which fails to comply or contains a defect is General Electric CR1 05X300 auxiliary contactor. The auxiliary contactor was manufactured by General Electric Company and supplied by Nuclear Logistic, Incorporated, as an auxiliary part of a General Electric CR305 contactor.

"Further evaluation of the failure determined it to be reportable under 10CFR21 on June 8, 2012. The Corporate Officer was informed on June 13, 2012. The Regional Administrator was notified as required, but, due to an oversight, this report was not made to the Operations Center. The required 30 day report has been submitted (ML121910230).'

The licensee has notified the NRC Resident Inspector.

HOO Hoc From: MATZKE, ERICK P [ematzke@oppd.com]

Sent: Wednesday, July 11, 2012 10:13 AM To: HOO Hoc

Subject:

Fort Calhoun Station Notification Attachments: 10CFR21 CR2012-01033.pdf Erick Matzke Senior Nuclear Licensing Engineer Omaha Public Power District Fort Calhoun Station, Mail Stop: FC-2-4 9610 Power Lane, Blair NE 68008 402-533-6855 ematzkeaoppd.com This e-mail contains Omaha Public Power District's confidential and proprietary information and is for use only by the intended recipient. Unless explicitly stated otherwise, this e-mail is not a contract offer, amendment, or acceptance. If you are not the intended recipient you are notified that disclosing, cdpying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

1

PAGE 1 OF 2 NRC FORM 361 U.S. NUCLEAR REGULATORY COMMISSION (12-2000) REACTOR PLANT OPERATIONS CENTER EVENT NOTIFICATION WORKSHEET EN#

NRC rD-41 OPERATION TELEPHONE NUMBER: PRIMARY - 301-816-5100 or 800-532-3469", BACKUPS - [1st] 301-951-0550 or 800-449-3694",

'ýn1_Aj5-nrn -n4 `1r-41 'anl-*r.lr-4/~ *1 ;,ne* ksh m i n.;. fl,} I, -n lr-T-Z * ' AA- +K...~l fh~o t . ~h -n n-rn -r NOTIFICATION TIME Eh Y RO(AITONUNIT NA P AI IFPR CL AK Ft. Calhoun Station 1 Erick Matzke 402-533-6855 EVENT TIME &ZONE EVENT DATE POWERIMOOE AFTER 1454CST 02/12/2012 0% 5 EVENT CLASSIFICATIONS 1-Hr. Non-Emergency 10 CFR 50.72(b)(1) Jv)(A) Safe W/0 Capability AN GENERAL EMERGENCY GENAAEC TS Deviation (v)(B) . RHR Capability AINB AREA EMERGENCY SIASC 4-Hr. Non-Emergency 10 CFR 50.72(b)(2) (v)(c) control of Rad Release AiNO ALERT ALEIAAEC F1(i) TS Required S/D ASHU L v)(D) Accident Mitigation AIND LUNUSUALEVENT UNUIAAEC (iv)(A) ECCS Dis ge to RCS ACCS (xi) Offsite Medical AMED 50.72 NON-EMERGENCY (see next columns) (iv)(B) RIPS Actuation (scram) ARPS I (xiii) Loss Comm/AsmtlResp ACOM PHYSICAL SECURITY V3.71) CED (xd) Offaite Notification APRE 60-Day Optional 10 CFR 50.73(a)(1)

RMATER FITNESS IONInvalid FOR OSURE DUTrY HRIT -Hr. Non-EmergencN M *[.... (ii)(A) Degraded Conditon 10 CFR 50.72(b)(3) ADEG * -Other' 1 CUnspecifiedl Specified System Actuation Requirement (identify) ,INV OTHER UNSPECIFIED REQMT. (see last column) (ii)(a) Unanalyzed Condition ALN 10CFR21R INFORMATION ONLY NINF l(iv)(A) Specified System Actuation AESF DESCRIPTION Include: Systems affected, actuations and their initiating signals, causes, effect of event on plant, actions taken or planned, etc. (Continue on back)

On February 10, 2012, during the monthly testing of Diesel Generator 1 (DG-l), speed was raised from 500 RPM to 900 RPM. At approximately 750 RPM the generator field did not "flash," a term used to describe the normal voltage buildup in the field of a generator.

Initial troubleshooting identified that the auxiliary contacts on the 2CR contactor did not close. This caused the field flash failure. The failure of the auxiliary contacts on the 2CR contactor prevented the diesel generator from performing its designed safety function. The specific part which fails to comply or contains a defect is General Electric, CR105X300 auxiliary contactor. The auxiliary contactor was manufactured by General Electric Company and supplied by Nuclear Logistic Incorporated, as an auxiliary part of a General Electric CR305 contactor.

Further evaluation of the failure determined it to be reportable under 10CFR21 on June 8, 2012. The Corporate Officer was informed on June 13, 2012. The Regional Administrator was notified as required, but, due to an oversight this report was not made to the Operations Center. The required 30 day report has been submitted (ML121910230).

NOTIFICATIONS YES NO -WILL BE ANYTHING UNUSUAL OR YES (Explain above) NO NRC RESIDENT I/f . NOT UNDERSTOOD?

STATE(s) .... ]DID ALL SYSTEMS LOCAL . FUNCTION AS REQUIRED?. YES NO (Explain above)

OTHER GOV AGENCIES _ MODE OF OPERATION ESTIMATED ADDITIONAL INFO ON BACK MEDIAPRESS RELEASE j.. UNTIL CORRECTED: 0 RESTART DA: YES n NO NRC FORM 361 (12-2000) PRINTED ON RECYCLED PAPER