05000270/LER-1983-004, Forwards LER 83-004/01T-0.Detailed Event Analysis Encl

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Forwards LER 83-004/01T-0.Detailed Event Analysis Encl
ML20072N208
Person / Time
Site: Oconee Duke Energy icon.png
Issue date: 03/23/1983
From: Tucker H
DUKE POWER CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20072N211 List:
References
NUDOCS 8304010473
Download: ML20072N208 (2)


LER-2083-004, Forwards LER 83-004/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2702083004R00 - NRC Website

text

. .

. D Dux1: POWER Goxraxy P.O. HOx 33180 oltARLOTTE, N.o. 28242 IIALB. TUCKER Teternoxz vete r.esanmar (704) 373-4531 mu.. .. oms.o. March 23, 1983 Mr. James P. O'Reilly, Regional Administrator $ -

U. S. Nuclear Regulatory Commission --

g Region II' $ C, f6 101 Marietta Street, NW, Suite 2900 m

?"5 Atlanta, Georgia 30303  ?. m y - , Q'

Subject:

Oconee Nuclear Station E 'h*

Docket No. 50-270 ..

d. .

.C. ..

Dear Mr. O'Reilly:

~'*

Please find attached Reportable Occurrence Report R0-270/83-04. This report is submitted pursuant to Oconee Nuclear Station Technical Specification 6.6.2.1.a(2)~

which concerns an operation subject to a limiting condition for operation which was less conecrvative than the least conservative aspect of the limiting condition for operation established in the Technical Specifications, and describes an incident which is considered to be of no significance with respect to its effect on the health and safety of the public.

Very truy yours, S' f

-Hal B. Tucker JCP/php Attachment cc: Document Control Desk Mr. J. C. Bryant U. S. Nuclear Regulatory Commission NRC Resident Inspector Washington, D. C. 20555 Oconee Nuclear Station Mr. E. L. Conner, Jr. INPO Records Center Office of Nuclear Reactor Regulation Suite 1500 U. S. Nuclear Regulatory Commission 1100 Circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 "O

gyylCh $-

L. 'hi_P'l

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'-EAAsi 8304010473 830323 PDR ADOCK 05000270 S PDR

Duke Power Company Oconee Nuclear Station Report Number: R0-270/83-04 Report Date: March 23, 1983 Occurrence Date: March 9, 1983 Facility: Oconee Unit 2, Seneca, South Carolina Identification of Occurrence: Valve 2HP-24 declared inoperable, thus making one independent train of HPI inoperable.

Conditions Prior to Occurrence: 100% FP Description of Occurrence: On March 9, 1983 at 0854, valve 2HP-24 failed to open during its quarterly Operational Valve Functional Test. It was manually cracked open and was unsuccessfully stroke tested. After it failed to open, 2HP-24 and one independent HPI train were both consider"d inoperable. 2HP-24 is a high pressure injection suction valve that uses water from the Borated Water Storage Tank (BWST).

Apparent Cause of Occurrence: The incident occurred due to component failure.

The cause was lack of lubrication (oil) of the valve stem.

Analysis of Occurrence: 2HP-24 or 2HP-25 provides the HPI pumps with suction from the Borated Water Storage Tank. During the time 2HP-24 failed to remotely open, 2sP-25, the redundant valve, was operable. Had an Engineered Safeguards (ES) event occurred, 2HP-25 would have opened to provide the HPI pumps with suction ,

from the Borated Water Storage Tank. The health and safety of the public were  !

not endangered by this occurrence.

Corrective Action: Valve 2HP-24 was manually opened, which is its ES position, and the HPI train was returned to service. Another stroke test was attempted but was again unsuccessful. The packing on the valve was loosened, the stem of the valve was lubricated, and the packing was readjusted. The valve was then successfully cycled many times and stroke tested. HP-24 and HP-25 on all units will be included in a preventive maintenance program, which would include repacking these valves every five years.