U-602954, Interim Part 21 rept,21-98-008 Re Identification That Bearings Installed in Hydrogen Recombiner B Cooling Fan Motor 0HG04CB Were Not Same as Bearings Specified on Motor Nameplate.Will Complete Evaluation of Issue by 980513

Interim Part 21 rept,21-98-008 Re Identification That Bearings Installed in Hydrogen Recombiner B Cooling Fan Motor 0HG04CB Were Not Same as Bearings Specified on Motor Nameplate.Will Complete Evaluation of Issue by 980513

ML20216H412
Person / Time
Site:	Clinton
Issue date:	03/09/1998
From:	Walter MacFarland ILLINOIS POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 21-98-008, 21-98-8, U-602954, NUDOCS 9803230013
Download: ML20216H412 (2)

Text

lihnois Power Corfipany j

. ,C Chnton Power Station P O. Box 678 Chnton,IL 61727 j Tel 217 935-5623 Fax 217 935-4632

- Walter G. MacFarland IV Chief Nue! ear officer P9WER.

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t w o2954 4F.140 An bnova.Cornpany ,

March 9, 1998 l

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Docket No. 50-461 10CFR21.21 Document Control Desk Nuclear Regulatory Commission Washington, D. C. 20555

Subject:

10CFR21 Interim Report 21-98-008: Reliance Electric Motors Supplied by Rockwell-International for Hydrogen Recombiner Cooling Fans Do Not Have Nameplate-Soecified High Temperature Bearinns

Dear Madam or Sir:

On January 13,1998, during disassembly and inspection of motors for a potential over-greasing condition, Illinois Power (IP) identified that the bearings installed in the Hydrogen Recombiner B Cooling Fan Motor O'HG04CB were not the same as the bearings specified on the motor nameplate data. The Hydrogen Recombiner B Cooling Fan motor was supplied to Clinton Power Station by Rockwell Intemational (now Boeing North American Rocketdyne Division). The fan motor was manufactured by Reliance Electric Company. The fan motor is a 3-horsepower,213T frame,460-volts alternating current, 3-phase motor, vendor serial number 3YF882654A2. Further investigation of this issue identified that the bearings installed in the Hydrogen Recombiner A Cooling Fan Motor OHG04CA are also not the same as the bearings specified on the motor nameplate data. Fan Motor OHG04CA is a 3-horsepower,213T frame, 460-volts alternating current, 3-phase motor, vendor serial number 3YF882654Al.

The motor nameplate for fan motor OHG04CB specifies the following motor bearings:

Drive End: 40BC02XPP30A26 Opposite End: 30BC02XPP30A26 ,

Cf (,)

The Hydrogen Recombiner vendor manual supplied by Rockwell specifies the (,C following motor bearings: /

Drive End: 25BC02XPP30A26 Opposite End: 30BC02XPP30A26 g gggggg 9003230013 980309 PDR ADOCK0500g1 5

• U-602954 Page 2 The actual bearings installed in these motors are as follows:

Drive End: KOYO Japan Part Number 6208Z (double shielded bearing)

Opposite End: KOYO Japan Part Number 6206Z (double shielded bearing) -

The installed bearings are standard heat stabilized to 250 degrees Fahrenheit (F).

Based on the bearing suffix code "26," the bearings specified by the motor nameplate and vendor manual should be bearings stabilized for size change ofless than 0.010 percent at 300 degrees F after 2500 hours0.0289 days <br />0.694 hours <br />0.00413 weeks <br />9.5125e-4 months <br /> (reference AFBMA Standards 20,1987, Section 5).

IP determined this issue was potentially reportable under the provisions of 10CFR21 on January 13,1998. Condition report 1-98-01-153 was initiated to track investigation and resolution of this issue. IP's evaluation of this issue under the provisions of 10CFR21 has not been completed. Both the Hydrogen Recombiner supplier and the motor supplier are assisting IP in the resolution of this issue. IP will complete the reportability evaluation of this issue by May 13,1998.

Additional information about this issue may be obtained by contacting F. T.

Browne, Procurement Engineering, at (217) 935-8881, extension 3398.

Sincerely yours, ypy

/

Walter G. MacFarland,IV Senior Vice President RSF/ljl cc: NRC Clinton Licensing Project Manager NRC Resident Office, V-690 Regional Administrator, Region III, USNRC G. C. Wright, Region III, USNRC lilinois Department ofNuclear Safety INPO Records Center Reliance Electric Company Boeing North American Rocketdyre Division f

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