Part 21 Report - 1998-281

 
 

ACCESSION #: 9805070004



ILLINOIS                                     [illegible print]

  POWER                                      Walter G. MacFarland IV

An Illinova Company                          [illegible print]



                                             U-602994

                                             4F.140



                                   April 29, 1998



Docket No. 50-461

                                             10CFR21.21

Document Control Desk

Nuclear Regulatory Commission

Washington, D. C.  20555



Subject:  10CFR21 Final 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, 460-volts

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



     The motor nameplate for fan motor 0HG04CB specifies the following

motor bearings:



          o    Drive End: 40BC02XPP30A26

          o    Opposite End: 30BC02XPP30A26



     The Hydrogen Recombiner vendor manual supplied by Rockwell specifies

the following motor bearings:



          o    Drive End: 25BC02XPP30A26

          o    Opposite End: 30BC02XPP30A26





                                                  U-602994

                                                  Page 2





     The actual bearings installed in these motors are as follows:



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

               bearing)

          o    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

notified the NRC in letter U-602954, dated March 9, 1998, that the

evaluation of this issue under the provisions of 10CFR21 was not

complete.



     IP has completed the evaluation of this issue under the provisions

of 10CFR21 and concludes that this issue is not reportable.  Testing by

the supplier and evaluation by IP demonstrate that the supplied Hydrogen

Recombiner fan motors are acceptable with the supplied bearings for both

normal and accident environmental conditions in their specified locations

at CPS.



     Additional information about this issue may be obtained by

contacting F. T. Browne, Procurement Engineering, at (217) 935-8881,

extension 3398.



                                   Sincerely yours,





                                   Walter G. MacFarland, IV

                                   Senior Vice President and

                                   Chief Nuclear Officer



RSF/mlh



cc:  NRC Clinton Licensing Project Manager

     NRC Resident Office, V-690

     Regional Administrator, Region III, USNRC

     Illinois Department of Nuclear Safety

     INPO Records Center

     Reliance Electric Company

     Boeing North American Rocketdyne Division





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