ML20081H102

Suppl to 910402 NPDES Noncompliance Notification:On 910331, Ph Excursion from Outfall 002 Equalization & Decantation Holding Basis Occurred.Caused by Error in Valve Alignment. Actual Release Vol Was 55,000 Gallons Not 115,000 Gallons

ML20081H102
Person / Time
Site:	Fort Calhoun
Issue date:	06/06/1991
From:	Gates W OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LIC-91-169R, NUDOCS 9106140107
Download: ML20081H102 (3)

Text

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Omaha Public Power District j 444 South 16th Stteet Mil l June 6,1991 Omaha, Nebrea GB102-2247 )

llc-91-169R 402/63G 2000 1

U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl 137 Washington, DC 20555

References:

1. Docket He 50-285

2. Letter from OPPD (W. G. Gates) to NRC (Document Control Desk) dated April 10, 1991 (LIC 91-123R)

3. Letter from OPPD (W. L. Neal) to Nebraska Department of Environmental Control (B. Gorman) dated April 2,1991 (91-EA-160)

4. Letter from 0 PPD (W. C. Jones) to NRC (R. A. Clark) dated April 15, 1983 (LIC-83-086)

Gentlemen:

SUBJECT:

Supplement to National Pollutant Discharge Elimination System (flPDES) Noncompliance Report Enclosed is a copy (w/o attachments) of Omaha Public Power District's (OPPD's) recent NPDES Supplemental Ncncompliance Report to the Nebraska Department of Environmental Control. System testing determined that the release volume from outfall 002 (chemical equalization and decantation holding basins) was conservatively overstated in the initial Noncompliance Report (Reference 3) forwarded with Reference 2.

This supplement is provided in accordance tith OPPD's commitment (Reference 4) to send the i1RC a copy of NPDES permit violations or changes.

If you should have any questions, please contact me.

Sincerely, IYf i

'i.)J-i, W. G. Gates '6 cl Division Manager Nuclear Operations WGG/sel Enclosure c: LeBoeuf, Lamb, Leiby & MacRae T. E. Murley, NRC Director, Office of Nuclear Reactor Regulation R. D. Martin, NRC Regional Administrator, Region IV W. C. Walker, NRC Project Manager R. P. Mullikin, NRC Senior Resident Inspector

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r i Omaha Pub!!c Power Distnct  !

I 444 South 16th street Mau

, Omana. Nebraska 68102 2247  !

April 25, 1991 402/626-2000  ;

3 91-NSD-053 i I

l j l Mr. Dennis Grams, Director Department of Environmental Control State of Nebraska P.O. Box 94877, State House Station 301 Centennial Mall, South ,

j t.incoln, NE 68509

Dear Mr. Grams:

i l In accordance with NPOES Permit Nos. NE0000418 NE0000621 NE0lll635, and '

l NE0000612 for the Fort Calhoun, North Omaha, Nebraska City, and Jones Street  !

Stations respectively, please find enclosed the completed Discharge l

Monitoring Reports for the first quarter 1991.

As was reported to the NDEC on 4 1-91 (verbal) dnd 4-2-91 (written)previously , OPP 0's fort Calhoun Station had a pH excursion from outf all 002 i (chemical equalization and decantation holding basins) on 3-31-91. The cause of the release was due to an error in valve alignment which allowed a portion of the chemical lagoon recirculation flow to be discharged out of the high river level pipe. With the exception of pH, analysis verified that other permit limits were not exceeded; 8.4 mg/l TSS (3.66 kg.) and no detectable levels of oil and grease. '

In the 4-2-91 written Noncompliance Report, OPPD calculated and reported an estimated maximum release volume of 115,000 gallons. OPPO, on 4-19-91, '

conducted an actual system test (see Attachment #1) under comparable  !

conditions and determined that the volume previously reported was '

conservative and that the actual release volume was approximately 55,000 gallons. This 55,000 gallon volume was utilized in the attached repor i for the fort Calhoun Station. ,

All other power stations are believed to have operated within permit conditions during the first quarter 1991.

Additionally, you will note that consistent with past practice during North Omaha Station Unit #5 outages when condenser temperatures were not available, flow rates for outfalls 001A and 010A have been estimated.

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91 NSD-053 Mr. Dennis Grams April 25, 1991 Page Two if you have any questions on any of the enclosed, please contact Mr. Tim Grove (636-2303) or Mr. Bill Neal (636-2302).

Sincerely, k6btitsud R. L. Andrews Division Manager Nuclear Services RLA/TVG/1sb Attachments

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