05000344/LER-1981-014, Forwards LER 81-014/03L-0.Detailed Event Analysis Encl

Forwards LER 81-014/03L-0.Detailed Event Analysis Encl

ML20010F542
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	08/27/1981
From:	Yundt C PORTLAND GENERAL ELECTRIC CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010F543	List: 05000344/LER-1981-014, Forwards LER 81-014/03L-0.Detailed Event Analysis Encl 05000344/LER-1981-014-03, /03L-0:on 810728,during Routine Operator Surveillance at 80% Power,Main Containment Isolation Valve for Demineralized Water Washdown Found in Open Position. Caused by Personnel Negligence.Valve Closed & Locked
References
CPY-643-81, NUDOCS 8109100334
Download: ML20010F542 (2)

LER-1981-014, Forwards LER 81-014/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3441981014R00 - NRC Website

text

.o e-3 e s o= v Portland General Electric Company Trojan Nuclear Plant P.O. Box 439 Rainier, Oregon 97048 (503) 156-3713 August 27, 1981 CPY-643-81 Mr. R. H. Engelken, Director p

/f j

U.S. Nuclear Regulatory Cocnission, Region V gbN

.1 1990 North California Blvd.

OgIO8/ A Walnut Creek, CA 94596 S; 84

Dear Sir:

q In accordance with the Trojan Plant Operating License, Appendix g

US NRC Technical Specifications, Paragraph 6.9.1.9, attached is Licensee Event Report No. 81-14, concerning a situation where the ranual containment isolation valve for demineralized water washdown (MD-059) was found in the open position.

Sincerely, OPR4JL1 3%C. P Yundt General Manager CPY/MJA:na Attachments c: LER Distribution List

/ 00 lir h

>,S us o

s y

y 8109100334 810827 PDR ADOCK 05000344

i 4.-

REPORTABLE OCCURRENCE I

J j

1.

Report No.:

81-14 x

2.

a.

Report Date:

August 27, 1981 b.

Occurrence Date:

July 28, 1981 3.

Facility: Trojan Nuclear Plant, PO Box 439, Rainier, OR 97048 4.

Identification of Occurrence:

During routine operations surveillance, it was discovered that MD-059, the manual containment isolation valve for demineralized water wash-i down was in the open position.

l 5.

Conditions Prior to Occurrence:

Prior to the occurrence the plant was in Mode 1 at 80% power.

6.

Description of Occurrence:

While performing routine surveillance checks of locked valves, MD-059, i

the manual containment isolation valve for demineralized water wash-i-

down was found in the open position.

7.

Designation of Apparent Cause of Occurrence:

l MD-059 was opened on July 15, 1981 to provide a water supply for troubleshooting containment sump level probes. After use the valve was apparently left open.

8.

Significance of Occurrence:

This event had no effect on plant or public safety since the redundant i

l containment isolation valve was operable.

9.

Corrective Action

1 Corrective action was to shut and lock the valve and verify its i

posicion by two independent checks. Further action was taken to i,

verify that all manual containment isolation valves are included in the locked valve list.

l Il' I

l l

l l