ML20245J458

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NPDES Noncompliance Notification:On 890804,89 Dead Fish Discovered in Circulating Water Discharge Bay.Possibly Caused by Temp Fluctuations at Bottom of Discharge Bay on 890803
ML20245J458
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 08/09/1989
From: Bradham O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: Krecker W
SOUTH CAROLINA, STATE OF
References
NUDOCS 8908180040
Download: ML20245J458 (8)


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[ S:uth Ccrtlina El:ctric & Gis Ccmp:ny oine s. Bridhsm i sc m es [u'Y,7$$1n

[* SCE&G v a.can :.--

August 9, 1989 Mr. William R. Krecker Environmental Quality Manager Water Quality Assessments & Enforcement Division South Carolina Department of Health

& Environmental Control 2600 Bull Street Columbia, South Carolina 29201

Subject:

Virgil C. Summer Nuclear Station Docket No. 50-395 Operating License No. NPF-12 Fish Kill August 4, 1989

Dear Mr. Krecker:

South Carolina Electric & Gas Company (SCE&G) herein submits a report concerning a fish kill in the Virgil C. Summer Nuclear. Station (VCSNS) discharge bay which occurred on August 4, 1989. The enclosed report describes the current event and probable cause. Also, per discussions with yourself and representatives from the South Carolina Department of Wildlife

& Marine Resources on July 31, 1989, SCE&G will submit an action plan by August 31, 1989.

In accordance with the VCSNS Operating License NPF-12, Appendix B, a copy of this raport is being provided to the Nuclear Regulatory Commission.

Additionally, a' copy of this report will also be provided to the South Carolina Department of Wildlife & Marine Resources per the request of Mr. H.

J. Logan, Chief of Fisheries.

Should you require any further information, please contact Mr. Uharles McKinney of my staff at your convenience.

Very truly yours, O. S. Bradham EWR/OSB: led Attachment c: M. B. Williams Document Control l(NRC)- e W. R. Baehr R. L. Prevatte S. E. Summer NPCF W. R. Higgins RTS (ONO 890067)

W. F. Bacon Files (818.05 & 809.06-1)

W. M. Lide, Jr.

8908180040 890809 95 [

PDR ADOCK 050 ei S

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  • FISil KILL REPORT

[ August 4,1989)

On the morning of August 4,1989, a fish kill was discovered in the circulat discharge bay of the V.C. Summer Nuclear Station (see Figure 1). A total of 8 were found floating in the bay, all of which were examined, measured, and identif species. Table 1 shows numbers, species, and size ranges of fish observed o and for several daya thereafter. All of the dead fish found on August 4th were found discharge bay; none were found in the discharge canal or in the open water of Mont Reservoir. All of the dead fish were badly decomposed, suggesting that the kill occur some time on the previous day, the third of August. No freshly-killed or moribund fish were observed. None of the fish examined showed any indication of trauma, disea poisoning. Dissolved oxygen levels in the discharge bay ranged from 4.8 - 5.3 mg morning of August 4, too high to have been the cause of the kill.

There were no fluctuations in power levels at the V.C. Summer Station in the day to, during, and after the kill. Summer Station operated at or near 100% power over the 8 1-89 through 8-4-89 time period. Condenser outlet temperatures (see Appendix I) from 106.0*F to 109.0*F over the 8-1-89 to 8-4-89 period. Temperatures at the bottom the discharge bay showed more extreme daily fluctuations, however, and on Aug 1989 they increased from 97'F at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> to 108'F at 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br />. Instantaneous temperatures as high cs 110*F were seen late in the evening (2000-2300 hours) on 8-3-8 A previous fish kill report (supplied to SCDHEC on 7-20-89) discussed the effect of Fairfield Pumped Storage Facility operations on Monticello Reservoir lake levels and pointed out the relationship between low lake levels and high water temperature in the discharge bay. On 8-3-89, a 3.8 foot drop in the lake level (0800 - 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />) was associated with an 11*F increase in average temperatures at the bottom of the dis bay.

Given the history of thermally-related fish kills at Summer Station and the absence of any other likely causes, it appears that the August 4,1989, fish kill was caused by temperature fluctuations at the bottom of the discharge bay on the third of August.

Nrth ---

Phillip Moore Environmental Specialist

s MONTICELLO RESERVOIR P

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SERVICEWATER POND Discharge

/ Canal I

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Discharge Ba s

J i CIRCULATING WATER DISCHARGE i

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Figure 1. I i

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. TABLE 1 FISH KILL INVESTIGATION August 4 - 7,1989 V. C. Summer Nuclear Station Date/ Time of Number Observation of Fish Species and Size Rance 8-4-89(1000) 89 82 White Catfish (4-12" Total Length) 3 Channel Catfish (6-12" Total Len h) 1 Black Crappie (6" Total Len 3 Bluegill (3-8" Total Length)gt 8-4-89(1230) 6 unknown

  • 8-4-89(1530) '7 unknown
  • 8-5-89(0800) 3 unknown
  • 8-5-89(1300) 5 unknown
  • 8-6-89(1430) 1 Bluegill (~6" Total Length) 8-7-89(1200) 4 4 White Catfish (6-8" Total Length) 8-7-89(1530) 0 ----

'Not examined; seen from shore.

  • a APPENDIX 1 Monticello Reservoir Condenser Discharae Bay Date Hours (EST) Lake Level Outlet Temp. Bottom Temp.

81 0100 422.6 107.3 106 0200 423.0 106.9 104 0300 423.4 106.8 104 0400 423.8 106.3 103 0500 424.3 106.3 102 0600 424.7 106.2 100 0700 424.9 106.0 99 0800 425.0 106.1 99 0900 425.0 106.1 97 1000 425.0 106.5 97 1100 425.0 106.7 96 1200 425.0 106.6 97 1300 424.8 106.9 97 1400 424.4 107.8 97 1500 424.0 108.1 100 1600 423.8 108.0 100 1700 423.5 108.3 101-1800 423.5 108.7 101 1900 423.5 108.3 101 2000 423.5 108.2 102 2100 423.5 108.0 102 2200 423.6 108.1 103 2300 423.7 108.2 102 2400 424.0 108.0 102

w ,

APPENDIX i -

(continued) i Monticello Reservoir Condenser Discharc e Bay Date'- Hours (EST) take Level Outlet Temp. Bottom "emp.

! 8-2 0100 424.2 107.5 101 0200 424.4 107.5 99 0300 424.6 107.0- 99 0400 424.8 106.8 99 0500 425.0 106.4 99 0600 425.0 106.2 99 0700 ---

106.2 97 0800- 425.0 106.2 99 0900 425.0 106.4 99 1000 425.0 106.9 99 1100 425.0 .107.9 99 1200 425.0 107.6 99 1300 424.9 107.5 97-1400 424.7 107.8 99 1500 424.2 107.7 100 1600 423.8 No Data Avail. 100 1700 424.4 No Data Avail. 100 1800 423.0 No Data Avail. 101 1900 422.7 No Data Avail. 102 2000 422.5 No Data Avail. 103 2100 422.4 No Data Avail. 103 2200 422.4 No Data Avail. 104 2300 422.6 No Data Avail. 103 2400 422.9 No Data Avail. 103

t 3: 3 APPENDIXl (continued)

Monticello Reservoir Condenser Discharoe Bay Date Hours (EST) - Lake Level Outlet Temp. Bottom Temo.

8-3 0100 423.4 1 No Data Avail. 103 0200 423.7 f

No Data Avail. 103 o

0300 424.0 No Data Avail. 103 0400 424.4 No Data Avail. 102 0500 424.7 No Data Avail. 99 0600 424.8 No Data Avail. 100 0700 424.9 No Data Avail. 99 0800 425.0 No Data Avail. 97 0900 ---

No Data Avail. 97-  ;

1000 ---

No Data Avail. 97 1100 424.9 No Data Avail. 97 1200 424.7 No Data Avail. 97 1300 424.4 No Data Avail. 97 1400 424.0 No Data Avail. 97 1500 423.4 No Data Avail. 99 1600 422.8 No Data Avail. 100 1700 422.2 109.0 102 1800 421.6 108.8 103 1900 421.4 108.7 106 2000 421.2 108.7 107 2100 421.2 108.5 108 2200 421.2 108.5 108 (

2300 421.6 108.9 107 2400 422.2 107.6 104 l

I l

I I

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4 . . . a

$f APPENDIX l (continued) i Monticello Reservoir Condenser Discharoe Bay Date Hours (EST) Lake Level Out!et Temo. Bottom Temp.

84 0100 422.6 107.2 106 0200 423.1 107.0 103 0300 423.6 106.8 103 0400 424.0 106.6 102 0500 424.4 106.5 101 p

0600 424.7 No Data 99 0700 424.9 No Data 99 0800 425.0 No Data 99-0900 ---

No Data 97-1000 ---

No Data 97 1100 ---

No Data No Data 1200 425.0 No Data No Data 1300 424.7 No Data No Data 1400 424.2 No Data No Data --

1500 423.7 No Data No Data 1600 423.0 No Data No Data 1700 422.4 No Data No Data 1800 422.0 No Data No Data 1900 421.7 No Data No Data 2000 421.5 No Data No Data 2100 421.5 No Data No Data 2200 421.5 No Data No Data 2300 421.7 No Data No Data 2400 422.0 No Data No Data

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