ML19317E914
| ML19317E914 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/25/1975 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML19317E911 | List: |
| References | |
| RO-287-75-01, RO-287-75-1, NUDOCS 8001070716 | |
| Download: ML19317E914 (1) | |
Text
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4 DUKE POWER COMPANY OCONEE UNIT 3 Report No.:
UE-287/75-1 3
- 2 $~lf Report Date: March 25, 1975 Event Date:
February 11, 1975 Facility: Oconee Unit 3, Seneca, South Carolina Identification of Event:
Inoperability of Keowee manual emergency start pushbuttons Conditions Prior to Event: Not applicable Description of Event:
On February 11, 1975, an Oconee Test Engineer noticed that the electrical drawings did not show the wiring for the Keowee Hydro Station emergency start pushbuttons to be complete in the Oconee Unit 3 control room.
Investigation revealed that the pushbuttons labeled "Keowee Emergency Channel A" and "Keowee Emergency Channel B" were wired to a nearby terminal board; however, wiring was not present from the terminal board to the Keowee emergency start panels.
Although the automatic Engineered Safeguards (ES) actuation was not affected, the manual emergency start feature was inoperable. A station modification was prepared and completed on March 14, 1975.
Designation of Apparent Cause of Event:
The apparent cause of this event was a design error in omitting the circuit between the terminal board and the Keowee emergency start panel.
This error was not discovered during construction since Quality Assurance compares installation to the design drawings. A test of these circuits was not included as a part of preoperational testing.
Analysis of Event:
This incident revealed that the capability to manually start the Keowee Hydro Station from the Oconee Unit 3 control room was inoperable. This in no way affected the similar capability from the Unit 1 and 2 control room, nor did it affect the automatic Engineered Safeguards initiation. Thus, the system would have performed properly in the event of a loss of main feedet bus or an actual accident condition.
It is concluded that the health and safety of the public was not affected.
Corrective Action:
The station modification which provides for the wiring of the Unit 3 emergency start circuit has been completed. The annual test of this circuit, originally
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scheduled for July, 1975, will be completed by April 1, 1975.
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CONTROL NO:
3297 FILE: INCIDITr REPCRT FILE FROM: Duke Power Ccapany DATE OF DOC DATE REC'D LTR TWX RPT OTHER 1
?l. C.
28201 3-25-75 3-28-75 n
TO:
ORIG CC OTHER SENT AEC PDR XX H
Mr. Ilarman C. Moseley 1
SENT LOCAL PDR CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:
- CCC 1
so_o87 DESCRIPTION: Ltr trans the following:
ENCLOSURES: Unusual Event 287/75-1on2-11-75 re inoperablilty of Keswee =anual emergency start pushbuttons...
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(l cy encl rec'd)
PLANT N AME:
Cconee Unit 3 FOR ACTION /INFORMATION DEL 7-91 7s BUTLER (L)
SCHWENCER (L) ZIEMANN (L)
REG AN (E)
W/ Copies W/ Copies W/ Copies W/ Copies CLARK (L)
STOLZ (L)
DICKER (E)
LEAR (L) w! cnm w/ Copies w/ Copies m cones PARR (L)
VASSALLO (L)
KNIGHTON (E)
SPELS W/ Copies W/ Copies W/ Cocies W/ Copies KNIEL (L)
NURPLE (L)
YOUNGBLOOD (E)
W/ Copies W
opies W/ Copies W/ Copies INTERNAL DISTRISUTION 6EG FIUP TECH REVIEW DENTON LIC ASST A/T IN D f.vav ruR sSCHROEDER
% RIMES R. OlGGS (L)
B R AITM AN OGC, ROOM P 506A MACCARY GAMMILL H. GEARIN (L)
SALTZMAN GOSSICK/ STAFF KNIGHT KASTNER E. GOULBOURNE (L)
MELTZ CASE PAWLICKl BALLARD P. KREUTZER (E) f GI AM BUSSO SHAO SP ANG LER J. LEE (L)
PLANS BOYD
MCDONALD MOORE (L)
- . HOUSTON ENVIRO S. REED (E)
CHAPMAN DEYOUNG (L)
- , NOV AK MULLER NJ. SERVICE (L)
DUBE (Ltr)
SKOVHOLT (L)
,ROSS DICKER
- 16. SH EPPAR D (L)
E. COUP E f
GOLLER (L) (Ltr) lPPOLITO KN!GHTON M. SLATER (E)
PETERSON f
P. CO LLINS TEDESCO YOUNGBLOOD H. SMITH (L)
HARTFIELD (2)
DENISE LONG REGAN S. TEETS (L)
KLECKER REG OPR LAIN AS PROJECT LDR G. WILLI AMS (E)
EISENHUT
/ FILE & REGION (2)
BENAROYA V. WILSON (L)
WIGGINTON
/
.R. WILSON (3)
VOLLMER HAR LESS R. INGRAM (L)
F. '4ILLI.'O'S T
STEELE
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EXTERNAL DISTRIBUTION
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