ML20071L692
| ML20071L692 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Hatch, Fermi, 05000000 |
| Issue date: | 05/20/1983 |
| From: | Haisler R LITTON INDUSTRIES, INC. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-83-991-000 PT21-83-991, PT21-83-991-000, NUDOCS 8305270625 | |
| Download: ML20071L692 (3) | |
Text
~l LOUIS ALLIS 555 Lawton Avenue,Beloit Wl53511 C08/365-4491 TLX260029 Litton Beloit Power Systems May 20, 1983 4
USNRC 799 Roosevelt Road Glen Ellen, IL 60137 Attn:
James G. Keppler
Subject:
Dear Sir:
This is to confirm my telephone call to Mr. Frank Jablonski of your office today, 05/20/83.
I am reporting two (2) different potential defects.
To set the record straight we are Louis Allis/Beloit Power Systems; successor to Beloit Power Systems, Inc. (Tang Ind.) and to Colt -
Fairbanks Engine Division (Generator Division).
PROBLEM #1 i
Power Plant affected - IL Power Clinton Station Unit Serial # 700003 R1 Model:
6 Frame Generator Mfg.: Beloit Power Systems, Inc. (Tang Ind.)
Date Shipped:
1977 Sold to: Stewart & Stevenson The potential problem with this generator is that there is a 3 phase rectifier assembly in the exciter which was not connected in parallel ie., parallel windings (coils) are not connected in parallel and could cause the field winding insulation to deteriorate and cause a premature failure.
_ Corrective Action:
Contact Mr. Shef Massey of Louis Allis/Beloit Power Systems, 608-365-4431 to have our Field Service reconnect the exciter leads in the proper parallel combination as soon as possible.
Corrective Action To Prevent Reaccurance:
BPS has made an Engineering change order out to correct all drawings, so this will not occur on future exciters.
Problem #2 is unrelated to Problem #1.
[
8305270625 830520 PDR ADDCK 05000321 MAY 2 3 1983 S
l*
Page 2 To: USNRC May 20, 1983 PROBLEM #2 User #1 - Detroit Edison (Ferm Plant)
S.N. #504075R1
- 504075R2
- 504075R3
- 504075R4 Shipped:
1974 Shipped By: Beloit Power Systems, Inc. (Tang Ind.)
User #2 - N.E. Utilities (Millstone #2)
S.N. #503727R1
- 503727R2 Shipped:
1972 Shipped By:
Colt Industries (FMED)
User #3 - Georgia Power (Hatch)
S.N. # 503240R1
- 503240R2
- 503240R3 Shipped:
1971 Shipped By:
Colt Industries (FMED)
Potential Problem #2 Detroit Edison experienced high vibration in their 6 frame 40" core generators.
Louis Allis/Beloit Power Systems dispatched their Field Service Manager to the job site who confirmed that they had loose pole wedges.
LA/ BPS Engineering did a detail Engineering Evaluation and determined in 1976 Engineering had made a material change to l
1045 steel from HRS 1020 steel. Our Engineering staff believes that the units manufactured prior to this change could experience the loose pole wedges.
We are asking the users to measure their vibration in 3 planes, both ends and report the num ber of hours on each generator back to R.
Haisler of LA/ BPS so a determination can be made if the pole wedges need to be changed.
By copy of this letter the users are being asked to take the action requested and report the information to either Shef Massey, Electrical Product Manager, or Richard K. Haisler, Manager Quality Assurance at 608-365-4491 and file a written report to 555 Lawton Avenue, Beloit, WI.
53511.
Page 3 To:
USNRC May 20, 1983 Yours Truly, LOUIS ALLIS BELOIT POWER SYSTEMS h/
n Richard K. Haisler Manager Quality Assurance RH/mr cc: North East Utilities Service Co, Hartford, Conn. (QA Mgr.)
Georgia Power Co., Atlanta, Ga.(QA Mgr.)
Detroit Edison Co., Detroit, Mich. (QA Mgr.)
J. Tangye - Colt Industries, Beloit, WI.
.