United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9803230013



                                                  Illinois Power Company

                                                  Clinton Power Station

                                                  P.O. Box 678

                                                  Clinton, IL 61727

                                                  Tel 217 935-5623

                                                  Fax 217 935-4632



                                                  Walter G. MacFarland IV

ILLINOIS                                          Chief Nuclear Officer

     POWER

     An Illinova Company                          U-602954

                                                  4F.140



March 9, 1998                                     March 9, 1998



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-Specified High Temperature

          Bearings



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

0HG04CB 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 International (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 0HG04CA

are also not the same as the bearings specified on the motor nameplate

data.  Fan Motor 0HG04CA is a 3-horsepower, 213T frame, 4060-volts

alternating current, 3-phase motor, vendor serial number 3YF882654A1.



     The motor nameplate for fan motor 0HG04CB specifies the following

motor bearings:



     Drive End: 40BC02XPP30A26

     Opposite End: 30BC02XPP30A26



     The Hydrogen Recombiner vendor manual supplied by Rockwell specifies

the following motor bearings:



     Drive End: 25BC02XPP30A26

     Opposite End: 30BC02NPP30A26



                                                       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 of less than 0.010 percent at 300 degrees F

after 2500 hours (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 3399.



                                   Sincerely yours,



                                   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

     Illinois Department of Nuclear Safety

     INPO Records Center

     Reliance Electric Company

     Boeing North American Rocketdyne Division



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