ML101380397

Part 21 Report - Lugs on Digital Filter Improperly Soldered

ML101380397
Person / Time
Site:	Farley, San Onofre
Issue date:	05/13/2010
From:	Menichino J Dresser-Rand
To:	Office of Nuclear Reactor Regulation
References
Download: ML101380397 (3)

Text

0511312010 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Pakle I General Information or Other (PAR) Event# 45921 Rep Org: DRESSER-RAND Notification Date I Time: 05/12/2010 18:39 (EDT)

Supplier: DRESSER RAND Event Date / Time: 05/12/2010 (EDT)

Last Modification: 05/12/2010 Region: 1 Docket #:

City: WELLSVILLE Agreement State: Yes County: License #:

State: NY NRC Notified by: JOE MENICHINO Notifications: KATHLEEN O'DONOHUE R2DO HQ Ops Officer: CHARLES TEAL GREG PICK R4DO Emergency Class: NON EMERGENCY PART 21 GROUP EMAIL 10 CFR Section:

21.21 UNSPECIFIED PARAGRAPH LUGS ON DIGITAL FILTER IMPROPERLY SOLDERED A faulty Digital Control System Output Filter was discovered at Farley Nuclear Power station while installing it on the emergency feedwater Terry Steam Turbine. The problem only affects two plants: Farley Nuclear Power Station and San Onofre Nuclear Power Station. Farley replaced the filter before use. San Onofre had installed and used the filter, but they are replacing it.

"Description of Defect:

"Eyelets inserted into the printed circuit (p.c.) board to make connections from one side of the board to the other side were not soldered on the top side where the terminal block is installed. This may result in the connection being broken during tightening of the wire lug on the terminal block or if other stresses are applied to the p.c. board or terminal block. This defect is limited to output filter serial numbers 10009, 10010, 10011, and 10012.

"Engineering Evaluation and Recommendations:

"Failure can occur during assembly. The results of a seismic event are unknown. All 4 filters must be recovered and repaired. Locations of the 4 filters include Dresser-Rand, Farley Nuclear Station, and San Onofre Nuclear Generating Station."

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DRESSERRAND Wellsville Operations 37 Coats Street P.O. Box 592 Wellsville, NY 14895 PH: 585-593-1234 May 11, 2010 To: NRC Operations Center Fax: 301-816-5100

Subject:

10CFR Part 21 Initial Report Dresser-Rand No. 042 To Whom It May Concern-Attached find a copy of Dresser-Rand Initial Part 21 Report Number 042. It is directed at a Digital Control System Output Filter. The anomaly was recently discovered during an outage at the Farley Nuclear Power station. The plant was installing Dresser-Rand's Digital Control System Conversion on the Emergency Feedwater Terry Steam Turbine.

The problem is contained and the only 2 affected plants are Farley Nuclear Power Station and San Onofre Nuclear Power Station. Both plants have been notified of the issue and are implementing corrective action.

The Final Report will be issued by Dresser-Rand during the week of 5/17/2010.

Please call me at 585-596-3406 if there are any questions related to this issue.

Joe Menichino

_K Manager, Navy/Nuclear Product Engineering Dresser-Rand Government Business Unit 2/T'd 8226etkdooTsTeTg2T8:0i lINl 'sfl no9~:womj dt2:tP0 oTo2-2T-Aljiw

INITIAL REPORT 10CFR PART 21 REPORT OF.A POTENTIAL SAFETY HAZARD Report No. 042 Page 1 of I PREPARED BY: Mark Konieczny Date: 5/12/10 File No: F37858A/B TITLE: Navy Nuclear Product Engineer Serial No: T37858ANB Type: GS2N PART NAME: Output Filter Network Part No: 890313-001 Dwg. No: 890313 Rev. Level: N/A DEFECT:

DESCRIPTION OF Eyelets inserted into the p.c. board to make connections from one side of the board to the other side were not soldered on the top side where the terminal block is installed. This may result in the connection being broken during tightening of the wire lug on the terminal block or if other stresses are applied to the p.c. board or terminal block. This defect is limited to output filter serial #s 10009, 10010, 10011, and 10012.

ENGINEERING EVALUATION & RECOMMENDATIONS:

Failure can occur during assembly. Results of a seismic event are unknown. All 4 filters must be recovered and repaired. Locations of the 4 filters include Dresser-Rand, Farley Nuclear Station, and San Onofre Nuclear Generating Station.

Evaluation/Recommendation Prepared By: Mark Konieczny !4'( J /,F/

Title:

Navy Nuclear Produc-..lngineer E~ate: 212/1 t-(, I Approved By: Joe Menichino xvlzxo

Title:

Navy Nuclear Ergingefing Manager Date: 5/12/10 DISPOSITION, CHECK ONE:

^ Yes, this constitutes a safety hazard and requires a Final Report be prepared (EF-066)

- No, this does not constitute a safety hazard and does not require any further reporting.

Reviewed by D-R Wellsville

• sonsible Officr:.

Signature:" .* .k--

Title:

Director Government Business Unit Date: __\ \--A)

RETURN TO MANAGER NUCLEAR PRODUCT ENGINEERING EF-065 (Initial Report 10 CFR Part 21 Report of a Potential Safety Hazard), REV. E, 16MAY01 2/2'd 92)_G2td00TS9T8T02T8:01 GT=%sTseg*8 ~T~9E~TB~dT2:tB0 0T02-2T-AUW IIfl 'sfl *OO:WcJýIA 2~2J9E!E2kd~T~TT0E8:oI