ML20039D953

Forwards LER 81-018/01T-0.Detailed Event Analysis Encl

ML20039D953
Person / Time
Site:	Oconee
Issue date:	12/21/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20039D954	List: ML20039D953 ML20039D958
References
NUDOCS 8201060371
Download: ML20039D953 (2)

Text

, _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _

w ~a o

UR

h. OWER Dux?tqP,4 "si

, COMPANY M j 'cv ,,

PowEW "Dp:itDtyg 422 Sovra Caumen Starzt. C'nintoriz. N. C. eaa.sa di DFC30 a g , p '

. WILLIAM O. PAR K E R, J R.

wer Patsiot=T Ttt t P+.oh t:Aata 704

' su- Paooveno= December 21, 1981 273-4os 2 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission

, Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: Oconee Nuclear Station Docket No. 50-270

Dear Mr. O'Reilly:

Please find attached Reportable Occurrence Report R0-270/81-18. ~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 conservative than the least. conservative aspect of the limiting condition for operation established in the Technical Speci-fications, 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. My letter of-December 7,1981, expres7ed the delay in the preparation of this repor Very truly yours, p ~~ ,,3; p

~ *

'U- 'O< '

gn

$$$$hQll r William O. Parker, Jr. J; %gg

, e e^ cs ,% '

JIJ:ls

. Attachment y/g cc: Director Records Center

.0ffice of Management & Program Analysis Institute of Nuclear Power Operations U.-S. Nuclear Regulatory Commission 1820 Water Place Washington, D. C. 20555 Atlanta, Georgia 30339 l

Mr. W. T. Orders l

NRC. Resident Inspector C Oconee Nuclear Station 4

WNW. .. .OTi '

! ,_ r,~

)PDR ADOCK8201060371

05000270 811221 L-k.__. PDR-' -d. [' b.. .e

_ n j/7

a . s' DUKE POWER COMPANY OCONEE UNITS 2 AND 3 Report Number: RO-270/81-18 Report Date: December 21, 1981 Occurrence Date: November 23, 1981 Facility: Oconee Units 2 and 3, Seneca, South Carolina Identification of Occurrence: Loss of Prime to the Emergency Condenser Circulating Water System Conditions Prior to Occurrence: Oconee 2 - 75% FP Oconee 3 - 100% FP Description of Occurrence: At approximately 1011 hours0.0117 days <br />0.281 hours <br />0.00167 weeks <br />3.846855e-4 months <br /> on November 23, 1981, while attempting to vent the Condenser Circulating Water (CCW) lines by use of the CCW emergency discharge valves, CCW-1 thru CCW-6, the CCW discharge valve to the Keowee Tailrace, valve CCW8, was inadvertently opened and then faile6 open, thus resulting in a loss of prime for the CCW Emergency Cooling Discharge line.

Apparent Cause of Occurrence: The primary cause of this incident was the failure of personnel to heed the precautions noted in the procedure. A contributing cause to this incident was the failure of valve CCW-8 to close properly.

Analysis of Occurrence: Unit I was at cold shutdown at the time of the incident.

Units 2 and 3 began shutdawn sequence, as required by the Technical Specifications, immediately after discovery of the incident. Since normal cooling was available to all units through the condenser, the health and safety of the public were not compromised by this incident.

Corrective Action: Units 2 and 3 began shutdown sequence af ter discovery of the incident. Valve CCW-8 was manually closed and the emergency discharge line was reprimed. The operating procedures dealing with the venting and filling of the CCW system will be reviewed and revised as deemed necessary to insure that the venting of the CCW both on startup and if the prime is inadvertently lost is adequately addressed.

u