Part 21 Report - 1996-292
LICENSEE: MKW POWER SYSTEMS, INC.
SITE: MKW POWER SYSTEMS, INC. EN NUMBER:30475
DOCKET: EVENT DATE: 05-16-96
RX TYPE: EVENT TIME: 00:00
VENDORS: NOTIFY DATE: 05-16-96
EMERGENCY CLASS: N/A REGION: 2 STATE: NC TIME: 13:41
OPS OFFICER: CHAUNCEY GOULD
10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH
MKW POWER SYSTEMS, INC., REPORTED THAT THERE IS A PROBLEM WITH A
VOLTAGE REGULATOR USED ON THEIR SAFETY RELATED DIESEL GENERATORS.
DURING REPAIR AND TESTING OF A VOLTAGE REGULATOR, MANUFACTURED BY
NEI PEEBLES, FOR TURKEY POINT, VOLTAGE INSTABILITY WAS OBSERVED.
THE CAUSE WAS DETERMINED TO BE DUE TO FOREIGN MATERIAL ON THE
STATIONARY WIPER PORTION OF THE R4 VOLTAGE ADJUST POTENTIOMETER.
THE POTENTIOMETER IS 250 OHM, 2W, MANUFACTURED BY CHICAGO
TELEPHONE SUPPLY, P/N 115R251A AND HAS BEEN USED BY NEI FOR OVER
20 YEARS FOR THIS APPLICATION. THE FOLLOWING U.S. CUSTOMERS
AFFECTED ARE:
1. OCONEE
2. ST LUCIE-2
3. TURKEY POINT
4. GRAND GULF
5. KESSELRING
6. TROJAN
7. SUSQUEHANNA
8. RANCHO SECO
9. WATTS BAR
10. SEQUOYAH
11. POINT BEACH
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