ML20210S335
| ML20210S335 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek, 05000000, Shoreham |
| Issue date: | 02/04/1987 |
| From: | Schwellensattl BASLER ELECTRIC |
| To: | Patricia Pelke NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-87-031-000 PT21-87-031-000, PT21-87-31, NUDOCS 8702170612 | |
| Download: ML20210S335 (1) | |
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r h/j Basler Electric i@9/ Fous)or P/
H. hland, Ill.inois ig e
BOX 269, ROUTE 143 HIGHLANQ IL 62249 USA.
PHONE: 618/654-2241
- TWX: 510-1003841 Easylink 6287-8226 RETURN RECEIPT REQUESTED February 4, !987 Mr. Paul Pelke USNRC Region #3 Office of Inspection and Enforcement Glen Ellen, IL 60137
Dear Mr. Pelke:
This letter confirms our plan of action to resolve the cracking o-ring problem on the latch mechanism on the contactors contained in our nuclear exciters. This plan was reported verbally on December 16, 1986.
Our contactor vendor, Sprecher and Schuh (S & S), has changed the o-ring material to Viton E60C. Although they do not have a history of this problem, they feel this material will improve the reliability of the latch mechanism. This material has more favorable specifications as compared with the previous o-rings. The new o-rings are green in color. Basler Electric has contacted our qualification lab for an analysis of this material. They report that Viton E60C has a life expectancy which greatly exceeds the qualified life goal of 40 years for our service conditions.
S & S has implemented a replacement program. They will supply four new contactors to Basler Electric. Basler Electric will forward them to Fairbanks Morse for instal-lation at Hope Creek or Shoreham nuclear power plants. Then, four contactors will be returned to S & S to be rebuilt with new o-rings and returned to the power plant in exchange for four more contactors. This will continue until all contactors at Hope Creek and Shoreham have been rebuilt.
These contactors are in nuclear power plants in Taiwan and Korea. The same program will be implemented with Imo Delaval and the Taiwan and Korea power plants.
Fairbanks Morse and Imo Delaval have been notified of the program. The first replacement contactors are scheduled to be at Basler on February 6,1987.
Sincerely, BASLER ELECTRIC COMPANY
- 0. - ~ k Jim Schwellensatti Engineering Assistant
)
JS/ra i
cc: George Oison, Fairbanks Morse Bruce Guntrum, Imo Delaval Ed Leird, Basler Electric Lou Meissner, Basler Electric FEB9
- 1987, Menufacturers of: Magnetic and Electmnic Components Power Products and Systems