05000267/LER-1981-039, Forwards LER 81-039/03L-0.Detailed Event Analysis Encl

Forwards LER 81-039/03L-0.Detailed Event Analysis Encl

ML20009E504
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/02/1981
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009E505	List: 05000267/LER-1981-039, Forwards LER 81-039/03L-0.Detailed Event Analysis Encl 05000267/LER-1981-039-03, /03L-0:on 810602,following Routine Chlorination of Circulating Water Sys,Sample Indicated Excessive Residual Chlorine in Plant Liquid Effluent.Cause Unknown.Subsequent Chlorinations Showed No Abnormalities
References
P-81179, NUDOCS 8107280257
Download: ML20009E504 (5)

LER-1981-039, Forwards LER 81-039/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2671981039R00 - NRC Website

text

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Mr. Karl V. Seyfrit, Director G

W Nuclear Regulatory Comission Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Re ference : Facility Operating License No. DP R-34 Docket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/

81-039, Final, submitted per the requirements of Technical Specification AC 7.5.2(b) 2.

Also, please find enclosed one copy of the Licensee Event Report for Reportable Occurrence Report No. 50--267/81-039.

Very truly yours,

b 7Yw Don Warembourg Manager, Nuclear Production DW/cis Enclosure cc: Director, MIPC 1

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/d 8107280257 810702 PDR ADOCK 05000267 S

PDR

OCCL'RRENCE REPORT DISTRIBUTION Number of Copies De pa r t me n t o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 (P Letter)

San Francisco Operations Of fice Attn: California Patent Group 1333 Broadway Oakland, California 94612 De p a r t nen t o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 (P Letter)

Mr. Glen A. Newby, Chief HTR Branch Division of Nuclear Power Development Mail Station B-107 Washington, D.C.

20545 De p a r tme nt o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 (P Letter)

Attn: Project Manager 110 West A Street, suite 460 San Diego, California 92101 Mr. Karl V. Seyfrit. Director 1

(Original of P Letter Region IV sad Copy of LER)

Of fice of Inspection and Enforcement Nuclear Regulatory Commission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 7601:

Di re c t o r - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 (P Letter, LER)

Of fice of Management Information and Program Control C. S. Nuclear Regulatory Commission Washington, D.C.

20555 Mr. R i cn a r d P he lp s - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10 (Original of FPLG Letter FS V, CA, Site plus Two Copies, One Rep resentative Copy of P Letter, One General Atomic Compan?

Copy of LER)

P. O. Box 426 Platteville, Colorado 80651 M r. 3111 Lava le e - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1 (P Letter, LER)

Nuclear Safety Analysis Center 3412 Hillview Avenue P. O. Box 10412 Palo Alto, California 94303 NRC Resident Site Inspector 1

(P Letter, LER)

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r REPORT DATE:

July 2, 1981 REPORTABLE OCCURRENCE 81-039 Determined ISSUE O OCCURRENCE DATE:

June 2. 1981 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD C0':lTY ROAD 191/2 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/81-039/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

Following regular chlorination of the circulating water system, samples of the plant liquid effluent were found to be in excess of the total residual chlorine limit permitted by LCO NR 1.1.

This is reportable per Fort St.

Vrain Technical Specification AC 7.5.2(b)2.

EVENT

DESCRIPTION

On May 16, 1981, during a plant maintenance shutdown period, operations personnel chlorinated the circulating water system as scheduled.

Following chlorination, the required sample of plant liquid effluent was taken and found to have a residual chloride level of 1.3 ppm.

This is in excess of the LCO NR 1.1 limit of 0.5 ppm.

The circulating water blowdown system was checked and found to be operating normally. Plant chemists investigated the chlorine system and found all chlorinativa equipment to function as designed.

Subsequent chlorinations of the circulating water system on a daily basis have resulted in normal chlorine residual levels.

With the icng liquid effluent discharge path and the hold up period in the plant farm pond, it is improbable that any chlorine would be discharged into the South Platte River.

CAUSE

DESCRIPTION:

A specific cause for this occurrence could not be determined.

Chlorination equipment and circulating water blowdown were checked and observed to operate normally.

CORRECTIVE ACTION:

Chlorination was complete before sampling indicated high chlorine residual.

Subsequent daily checks of circulating water system indicate that all systems are functioning properly; therefore, the

s REPORTABLE OCCURRENCE 81-039 ISSUE 0 page 2 of 3 incident is considered to have been an isolated malfunction, no specific corrective action can be identified at this time.

Subsequent chlorinations revealed no equipment abnormalties and normal residual chlorine levels.

No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 81-039 ISSUE O Page 3 of 3 Prepared By:

1 Paul Moore Technical Services Technician Reviewed By: _/. M fArd M

L. M. McBride 9

Technical Services Manager

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Reviewed By:

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E2f n 4.'hil1 Op(erationsManager l

Approved By:

MFM.

Don Warembourg ff Manager, Nuclear Production