ML14365A059

Part 21 Notification - Baldor AC Motors with Potential Bearing End Cap Alignment Issues

ML14365A059
Person / Time
Site:	Fermi
Issue date:	12/23/2014
From:	Thigpen J Baldor Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
50703
Download: ML14365A059 (4)

Text

1212312014 12/04U.S.

NuceIar Regulatnrv Co,nission flflPrahffion Ce~nter Event R-nnrt P,.ý 1

Part 21 (PAR)

Event #

50703 Rep Org: BALDOR ELECTRIC CO.

Notification Date I Time: 12/23/2014 13:55 (EST)

Supplier: BALDOR ELECTRIC CO.

Event Date I Time: 10/29/2014 (EST)

Last Modification: 12/23/2014 Region:

1 Docket #:

City: FLOWERY BRANCH Agreement State:

Yes County:

License #:

State:

GA NRC Notified by: JAMES THIGPEN Notifications: MARC FERDAS R1DO HQ Ops Officer: HOWIE CROUCH JONATHAN BARTLEY R2DO Emergency Class: NON EMERGENCY PART 21 GROUP EMAIL 10 CFR Section:

21.21(d)(3)(i)

DEFECTS AND NONCOMPLIANCE PART 21 NOTIFICATION - BALDOR AC MOTORS WITH POTENTIAL BEARING END CAP ALIGNMENT ISSUES The supplier, Baldor Electric Company, identified a potential fitment issue between the motor shaft journal, bearing cap and bracket that could allow the bearing cap to cock in the bracket. This misalignment would cause the motor to fail within hours of being placed in service. Therefore, all motors in service for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> would not be affected by the defect.

The supplier has notified its vendor and provided corrective actions and/or parts replacement as appropriate.

XX

FAX Date BAI0-DOV. -V07,.t-RELIANCEr, 12/23/2014 Number of pages including cover sheet 3

To: NRC Operations Center From: James Thigpen Quality Assurance Mgr.

Baldor Electric Co.

4349 Avery Drive PO Box 250 Flowery Branch, Ga. 30542 email jlthigpen@baldor.abb.com Phone 301-816-5100 Fax Phone 301-816-5151 Cc:

Phone (678) 947-7272 Fax Phone 678-947-7295 Remarks:

E] Urgent 0

For your review El Reply ASAP El Please comment I have attached a Nuclear Nonconfornmance Report which I am submitting in accordance with our quality plan procedure RGGSOP-0047 rev. 3, Procedure for I OCF2 I Implementation. I will need to know what e\\vent number you have assigned to this nonconformance report so I can complete a formal notification as required by the procedures.

Thank you, James "ilh igpen

B4LDOR:)0E:

Reliance Electric P. 0. Box 250, 4349 Avery Drive Flowery Branch, GA 30542 USA Tel 678.947.7350 i)ecember 23, 2014 TITLE: Initial Notification Report-To:

NRC Operations Center Phone 301-816-5100 Fax 301-816-5151.

Dear Sir or Madam:

NUCLEAR NONCONFORMANCE REPORT

1. CUSTOMER:

HOWDEN NORTH AMERICA INC.

7909 PARKLANE ROAD, SUITE 300 COLUMBIA SC 29223

2. PURCHASE ORDER:

1) 39679 - QTY 1

1) 44617-QTY 2

1) 481.05 - QTY 2

1) 012747, L/! 1 - QTY 3

1) 022355 - QTY 2

3. PART/COMPONENT NAME: AC MOTORS

4. PART/COMPONENT #: 1) B505968-011) TI

2) B656588-010 TI&T2

3) 13782464-010 TI&T2

4) B952117-010 TI, T2&T3

5) 111092454-010 TI

6) B1092454-010 T2 IHlowden P/N 600287-28R 1lowden P/N 600287-28R 1lowden P/N 600287-28R Howden P/N 600287-28R Howden P/N 600287-28R I-owden P/N 600287-28R

5. QUANTITY ON HAND - 1

6. LOCATION OF ALL UNITS SHIPPED - 9

1) Motor sold to PPL Susquehanna on PO 00452564

2) Motors sold to PPL Susquehanna on PO 00498365

3) Motors sold to PPL Susquehanna on PO 005271.58

4) Motors sold to PPL Susquehanna on PO 00557516

5) Motor sold to PPL Susquehanna on PO 00584975

6) Motor at Baldor Gainesville Motor Plant (Qty 1)

7. D)ATE NONCONFORMANCE ASCERTAINED: October 29, 2014

Relianice Electric A LAD O R

-P. 0. Box 250, 4349 Avery Drive Flowery Branch, GA 30542 USA "J

L,

", I H 7..

.aD -.

Tel 678.947.7350

8. D)ESCRIPTION OF DEFECT/NONCONFORMANCE: This is a reportable I0CFR2I notification because we believe it is possible that the 9 identified I E motors shipped by Baldor Electric, contain a design where the buildup of tolerances between the shaft journal, bearing cap and bracket could potentially allow the bearing cap to cock in the bracket causing a 0.001" interference fit on one side of the cap in a worst case scenario.

9. CORRECTIVE ACTION TAKEN: Baldor has notified Howden North America's Quality Assurance of our findings on the motor returned to Baldor for 10CFR21 evaluation. A review was completed by design engineering to determine this failure was due to a collection of events that occurred simultaneously, and if were to happen again, would result in failure within hours of the motor being powered. Baldor's solution to this worst case scenario is to open the clearances of the shaft bore in the cap up from a 0.008" radial clearance b)y design, to the maximum 0.012" radial clearance for 1.5" fit length for UL XP standards. This would eliminate any possibility of a rub while the cap is mounted in the cap journal of the bracket.

All motors that have been in service for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> do not require alteration of the bearing cap. Any others that have not been placed into service should have the opposite drive end bearing cap replaced to ensure this failure will not occur. The corrective action CAR-00451 Howden: Request for I0CFR2I. Evaluation for bearing lockdown was completed and closed on 12/23/14.

10. ANY ADVICE RELATED TO DEFECT/NONCONFORMANCE: All motors that have been in service for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> do not require alteration of the bearing cap. Any others that have not been placed into service should have the op)posite drive end bearing cap replaced with a newly designed cap (603295-7413) to ensure this failure could not occur.

11. INDIVDUAL COMPLETING THIS REPORT James Thigpen QA Manager, Baldor Electric Flowery Branch, GA 30542 l)ecember 23, 201.4