05000267/LER-1979-061, Forwards LER 79-061/03L-0

Forwards LER 79-061/03L-0

ML19256G100
Person / Time
Site:	Fort Saint Vrain
Issue date:	12/20/1979
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19256G101	List: 05000267/LER-1979-061, Forwards LER 79-061/03L-0 05000267/LER-1979-061-03, /03L-0:on 791120,pH & Total Dissolved Solid Samples Not Collected for Nine Shifts.Caused by Poor Weather.High Chlorine Residual Discharge Caused by Low Retention Time Due to Alternate Discharge Flow Path
References
P-79306, NUDOCS 7912270426
Download: ML19256G100 (4)

LER-1979-061, Forwards LER 79-061/03L-0

Event date:
Report date:
2671979061R00 - NRC Website

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public Service Company

? CcHede 16805 Weld County Road 191/2, Plattevillo, Colerado 80651 Decembe r 20, 1979 Fo rt S t. Vrain Un!t No. 1 P-79306 Mr. Karl V. Seyf rit, Director Nuclear Regulator / Cc=cission Region IV Of fice of Inspecticn and Enforcement 611 Ryan Plaza Drive S uit e 1000 Arlingt:n, Texas 76012 REF: Facility Cperating License No. DPR-34 Docket No. 50-267

Dear Mr. Seyf rit:

Enclesed please find a copy of Reportable Cecurrence Report No. 50-267/79-61, Final, subaitted per the requirements of Technical Specification AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for Report-able Occurrence Report No. 50-267/79-61.

Very truly yours,

hy M.

Don Ware = bourg Manager, Nuclear Production DW/cis cc: Director, MIPC Joo)

.3 1643 336 jj 79129 y

REPORT DATE:

December 20, 1979 REPORTA3LE OCCURRENCE 79-61 ISSUE O OCCURRENCE DATE:

November 20, 1979 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATIEVILLE, COLORADO 80651 REPORT NO. 50-26 7/ 79-61/03-L-0 FINAL IDENTIFICATION OF OCCURRENCE:

For a period of nine shif ts (while the reactor was in a shutdown condition),

beginning with day shif t on Nove=' er 20, 1979, pH and TDS (total dissolved o

solids) sa=ples were not collected as required by Fort St. Vrain Technical Specification SR NR 1.1.

In addition, the chlorine residual discharged to the Fort S t.

Vrain River for November 27, 1979, was above the LCO NR 1.1 11=it of 0.5 pps.

These occurrences are reportable per Fort S t.

Vrain Technical Specification AC 7.5.2(b)2.

EVENT

DESCRIPTION

3eginning with day shif t on Nove=ber 20, 1979, and centinuing through graveyard shif t en Nove=ber 23, 1979, sample analysis for pH and TDS (total dissolved solids) was not performed in accordance with SR NR 1.1, Cnemical Concentrations.

Table NR-1, Sa=pling Frequency, calls for sa=pling and analysis of non-radioactive effluent discharge for pH and TDS on a once per shift basis.

Sampl es were not taken for the time period in question because inclecent weather rendered the sa=ple point inaccessible. The sa=ple would have been taken at the junction of the Goosequill and Jay Thomas ditches; hew-ever, this could not be done due to a severe snowstors.

Sa=ple analysis prior to and folicwing this occurrence ravealed that pH and TDS concentrations were well within the 11=1:s of LCO NR 1.1.

During the period in question, no changes were made in plant operation which would be expected to cause a significant change in pH and TDS readings.

With regard to the high chlorine residual discharge on November 27, 1979, the high chlorine residual was due to the use of an alternate discharge path per=itted by LCO NR 1.1, following service water chlorination which allowed a shorter retention time than usual.

This high chlorine residual was of very short duration, likely less than 15 =inutes.

1 1643 337 9 h"> 70#

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REPORTA3LE OCCURRENCE 79-61 ISSUE O Page 2 of 3

CAUSE

DESCRI? TION :

Reason for inability to meet the NR 1.1 sa=pling interval was inclement weather, which rendered the sample point inaccessible.

The high chlorine residual was due to shorter retention ti=e as a result of utilizing an alternate flow path to the St. Vrain River rather than the South ?lt.cte River, as permit ted by LCO NR 1.1.

CORRECTIVE ACTION:

As soon as the roads became passable and the sa=ple point was again ac-cessible, the sa=pling and analysis f requency specified in SR NR 1.1, Table NR-1, was res umed.

Analysis of sacples prior to and following the =issed sa=ples indicates no pH or TDS concentrations outside the li=its of LCO NR 1.1 would have been ob served.

An additional sa=ple taken and analyzed 1 1/2 hours following observation of the high chlorine spike revealed a chlorine residual of 0.0 ppm.

No further corrective action is anticipated or required.

1643 338

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REPORTABLE OCCURRENCE 79-61 ISSUE O Page 3 of 3 0 OfN4 baeL(i A

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Prepared By:

Lg77e,2-v i

Cathy C. dI1rsch Technical Services Technician

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Reviewed By:

f//. /;'

. W. Gafm echnical Services Supervisor M

Reviewed By:

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Frank M. fiathie Operatiens Manager Approved 3y:

d'h 0t.0 Ms Don Warembourg

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Manager, Nuclear Production 1643 339