ML093220066

Part 21 Notification - Potential Failure in Emergency Diesel Generator Bearings

ML093220066
Person / Time
Site:	Calvert Cliffs, Prairie Island
Issue date:	11/16/2009
From:	Dietrich D Wartsila France S.A.S
To:	Office of Nuclear Reactor Regulation
References
45500
Download: ML093220066 (4)

Text

1111612009 U.S. Nuclear Regulatory Commission Operations Center Event Report Page I General Information or Other (PAR)Event# 45500 Rep Org: WARTSILA FRANCE S.A.S Notification Date I Time: 11/16/2009 14:27 (EST)Supplier:

WARTSILA FRANCE S.A.S Event Date / Time: 11/16/2009 (EST)Last Modification:

11/16/2009 Region: Docket #: City: Agreement State: No County: License #: State: NRC Notified by: DANIEL DIETRICH Notifications:

RAYMOND MCKINLEY R1DO HQ Ops Officer: MARK ABRAMOVITZ ERIC DUNCAN R3DO Emergency Class: NON EMERGENCY 10 CFR Section: 21.21 UNSPECIFIED PARAGRAPH PART 21 NOTIFICATION

-POTENTIAL FAILURE IN EMERGENCY DIESEL GENERATOR BEARINGS The following report was received via facsimile: "PART 21 Involving Wartsila type SACM UD45 Emergency Diesel Generating set big end bearings installed in the US nuclear power stations of Constellation Energy at Calvert Cliffs and Xcel Energy at Prairie Island."COMPONENT:

Big end bearing DLT141885 all batches & DLT123351 batches A2, F2, J2 on Wartsila type SACM UD45 emergency diesel generating sets."DISCUSSION:

Three of four incidents which have been reported to Wartsila France are related to UD45 diesel engines operating at 1500 rpm in nuclear installations.

Big end bearing damage can result in non-availability of the diesel engine. Wartsila France has been working on the root cause analysis after the first reported failure and has given an overall recommendation in October 2009 regarding the risks of using the above mentioned big end bearings on diesel engines running at 1500 rpm (50 Hz applications).

An additional technical evaluation has been issued in November 2009 after testing a new big end bearing. The evaluation has determined that this is potentially a reportable defect as defined by10CFR21."AFFECTED USERS: UD45 engines"CORRECTIVE ACTION: Being unable to predict the occurrence of such a random event, Wartsila France has advised its customers to: identify the emergency diesel generating sets equipped with big end bearings above referenced in COMPONENT, stop the utilization of big end bearings above referenced in COMPONENT, replace all above referenced in COMPONENT big end bearings by a new reference PAAG129161 which has been qualified after extensive running tests on a 1500 rpm engine. Wartsila has not recorded such a situation on other 11/16/2009 U.S. Nuclear Regulatory Commission Operations Center Event Report Page 2 General Information or Other (PAR) Event# 45500 UD45 diesel engines running at a lower speed of 1200 rpm (60 Hz applications) which are installed as Emergency Generating sets in nuclear power plants. Nevertheless Wartsila France recommendation if components have also been identified in 1200 rpm units installed in US nuclear power plants or if such components are held in stock, is to replace them with the new reference big end bearing PAAG129161."

16. Nov, 2009 20:21 N' 7455 P.- 1 WARTSILA fax W(c QSE Telephone

+33 3 89 66 69 64 Fax +33 3 89 66 69 20 To: whom it may concern From: Daniel DIETRICH Company: U.S. Nuclear Regulatory Ref.: QSE 091116 / 01 Commission Fax No.: 01 301 816 51 51 Date: November 16th, 2009 Copy to". Pages (incl.): 2

Subject:

Part 21 communication

[] Urgent El For Review Z For Information EH Please comment E] Please Reply -ASAP PART 21 Involving Wirtsila type SACM UD45 Emergency Diesel Generating sets Big end Bearings installed in the U S Nuclear Power Stations of Constellation Energy at Calvert Cliffs and Xcel Energy at Prairies Island.The lbllowing infbrmation is provided via fax and will be transmitted by regular mail within three days."COMPONENT:

Big end Bearing DLT141885 all batches & DLT123351 batches A2, 1F2, J2 on Wairtsili type SACM UD45 Emergency Diesel Generating sets."DISCUSSION:

Three of Ibur incidents which have been reported to Wartsild France are related to 1JD45 Diesel engines operating at 1500 rpm in nuclear installations.

Big end Bearings damage can result in non-availability of the Diesel engine.Wdrtsila France has been working on the toot cause analysis after the first reported failure and has given an overall recommendation in October 2009 regarding the risks of using the above mentioned Big end Bearings on Diesel engines running at 1500 rpm (50 Hz applications).

An additional technical evaluation has been issued in November 2009 after testing a new Big end Bearing.The actual evaluation on today is determining that this is potentially to be a reportable defect as defined by I OCFR21."AFFECTED USERS: UD45 engines Fax QSF 09111601 .doc P1age I / 2

16. Nov, 2009 20:21 N' 7455 P. 2"CORRECTIVE ACTION: Being unable to predict the occurrence of such a random event, Wmrtsildi France has advised its customers to: " identify the Emergency Diesel Generating sets equipped with Big end Bearings above referenced in COMPONENT,* stop the utilisation of Big end Bearings above referenced in COMPONENT." replace all above refIerenced in COMPONENT Big end Bearings by a new reference PAAG129161 which has been qualified after extensive running tests on a 1500 rpm engine, Wartsila has not recorded, such a situation on other UD45 Diesel engines running at a lower speed of 1200 rpm (60 Hz applications) which are installed as Emergency Generating sets in Nuclear Power Plants.Nevertheless Wartsili France recommendation if COMPONENTS have also been identified in 1200 rpm units installed in US Nuclear Power Plant or i "such COMPONENTS are held in stock, is to replace them by the new reference Big end Bearing PAAGI29161.

Best regards.Fax VSE 091116_0Ldoc Page2/ 2