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
*** END OF DOCUMENT ***
Page Last Reviewed/Updated Wednesday, March 24, 2021