ML20059B504

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NPDES Noncompliance Notification:On 900815 & 16,limited Fish Kills Discovered in Plant Circulating Water Discharge Bay. Caused by Thermal Shock from Increasing Discharge Temps Combined W/Fluctuating Water Levels
ML20059B504
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 08/20/1990
From: Bradham O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: Krecker W
SOUTH CAROLINA, STATE OF
References
NUDOCS 9008290126
Download: ML20059B504 (7)
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Text

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, South C:rottne Doctric & Gee Company Ome S. Brodham P.0 Box 88 Vice Prtsident -

>+ enkin v SC 29065 Nuclear Operations a- SCE&O-

. a,m August 20, 1990 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 ,

. .I

SUBJECT:

Virgil C. Summer Nuclear Station Discharge Bay Fish Kill August 15 and 16, 1990

Dear Mr. Krecker:

South Carolina Electric & Gas Company (SCE&G) herewith submits a report concerning a recent fish kill which occurred in the circulating water discharge bay of. the Virgil C. Summer Nuclear. Station (VCSNS). The enclosed report describes the event and provides a probable cause. As.noted in our previous correspondence on this matter, SCE&G is investigating the fish ki.,

issue and plans to arrive at a viable solution by the Fall of 1990, inaccordancewiththeVCSNSOperatingLicenseMN12',[AppendixB,acopyof this report is being provided to the Nuclear Regulatory Commission.

Additionally, a copy of the report will be provide to the South Carolina

~ Department of Wildlife & Marine Resources per the request of Mr. H. J. Logan, Chief of Fisheries.

If you have any questions, please call at your convenience, t

Very truly yours, >

O. S. Bradham RJB/0SB:ltb c: 0. W. Dixon, Jr./T. C. Nichols, Jr. NRC Resident Inspector M. B. Williams Central Midlands District W. M. Lide, Jr. Dick Christie L. A. Blue NSRC R. R. Mahan NPCF

.S. E. Summer RTS (ONO 900090)-

RDocument Control-Desk ~ FILE (809.06-1)

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9008$90126900820 #

PDR ADOCK 05000395 o PDC

i Fish Kill Report 08/15/90 and 08/16/90 Limited fish kills were discovered in the Virgil C. Summer Nuclear Station-circulating water discharge bay on 8/15/90 and 8/16/90. The apparent cause is th. rmal shock from increasing discharge temperatures combined with fluctuating b water levels in Monticello Reservoir caused by the operation of Fairfield Pumped Storage Facility. There were no 'anusual discharges from V. C. Summer Nuclear Station (VCSNS) which could h# contributed to the kols. Table 1 shows the-numbers and identification of the fish killeJ for each day. ' Fig re 1 shows the

-location of the fish kills. Table 2 and Table 3 show the lake levels, discharge bay temperatures and corresponding intake and discharge temperatures from VCSNS.

Based on the temperature data presented in Table 2, the fish found on 8/15/90 were

, probably killed late at night on 8/14/90 when the circulating water discharge temperature reached 107.S*F. Based on thelemperature data presented in Table 3, fish found on 8/16/90 were probably killed late at night on 8/15/90 when the e ilating water discharge temperature reached 107.2 F. The times of hottest c'echarge temperatures correlate with low reservoir levels. Figure 2 shows the temperatures on the bottom of the discharge bay, measured one foot above the bottom at Buoy #1 (shown on Figure 1), reached 105.7 F on 8/14/90 and 105.3*F on 8/15/90. More detailed data is available and will be presented to the South Carolina Wildlife and Marine Resources Department and the South Carolina Department of Health and Environmental Control with the quarterly fish kill study data.

S.J. Loftin de AA N / 8h.J o Environmental Spedalisf B / Date .

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Table 1 j u s 8/1S/90

  1. Fish Species ' Size Rance -

137 white catfish 4 - 10 inches -

127 sunfish

  • 4 - 7 inches 12 channel catfish 6 - 8 inches 1 gizzard shad 12 inches ,

1 shad (unidentified) 3 inches 1 catfish (unidentified) 11/2 inch 279 TOTAL i

8/16/90

  1. Fish Species Size Rance 19 white catfish 3 9 inches .

13 sunfish

  • 4 - 6 inches 7 channel catfish 6 - 13 inches ,

3 . gizzard shad 9 11 inches i i shad (unidentified) 21/2 inches -

43 TOTAL

-i

  • Approximately 75% bluegill,25% redear sunfish (badly decomposed).

i

f a 4 TABLE 2 8/14/90 8/15/90 Dis.

  • Dis. t charge charge Hour Lake Level Intake
  • Discharge
  • Bay Hour Lake Level Intake
  • Discharge
  • Bay

! EST (Feet) Temp *F Temp *F Temp.*F EST (Feet) Temp *F ' Temp *F Temp.*F

~

0100 423.1 81.3 107.0 101.4 0100 422.5 81.8 107.4 103.4 0200 423.4 81.3 106.9 100.2 0200 423.0 81.6 107.2 102.2 0300 423.8 81.3 106.9 99.0 0300 423.5 81.4 107.0 101.2 0400 424.2 81.3 106.8 98.0 0400 424.0 81.4 107.0 100.0  !

0500 424.6 81.2 106.7 96.8 0500 424.4 81.3 106.9 98.6 0600 424.8 81.1 106.7 95.8 0600 424.8 81.2 106.8 97.4 0700 425.0 81.1 106.6 95.2 0700 424.9 81.2 106.8 96.0 0800 425.0 81.1 106.7 94.8 0800 425.0 81.1 106.7 95.4 0900- 425.0 81.2 106.8 94.6 0900 1000 425.0 81.3 107.1 94.6 1000 1100 424.8 NO DATA 107.0 94.6 1100 1200 424.5 81.9 107.7 94.6 1200 1300 424.0 82.0 107.5 94.8 1300 1400 423.4 81.9 107.4 95.0 1400 f 1500 422.7 81.9 107.6 95.2 1500 1600 422.2 82.0 107.6 95.8 1600 1700 421.8 82.1 107.4 96.6 1700 1800 421.3 81.8 107.2 97.8 1800 1900 421.2' 81.7 107.3 100.0 1900 2000 421.2 81.8 107.3 102.6 2000 2100 421.1 31.9 107.4 104.6 2100 2200 421.2 82.0 107.5 105.7 2200 2300 421.5 81.9 107.4 105.7 2300 0000 421.9 81.9 107.4 105.1 0000

  • Measured at one foot from the bottom at Buoy #1.

TABLE 3-8/15/90 8/16/90

-l- Dis, t Dis 8

  • l- charge charge Lake Level intake' Discharge
  • Bay Lake Level intake
  • Discharge
  • Bay Hour (Feet) Temp *F Temp *F Te m p.*F Hour (Feet) Temp *F Temp *F Temp.*F 0100 422.5 81.9 107.4 103.4 0100 422.5 81.3 106.9 103.2 0200 423.0 81.7 107.3 102.2 0200 423.0 81.2 106.8 102.0 0300 423.5 81.5 107.1 101.2 0300 423.5 81.1 106.7 101.0 0400 424.0 81.4 107.0 100.0 0400 424.0 81.0 106.6 99.4 0500 424.4 81.4 106.9 98.6 0500 424I4 81.0 106.6 98.2-0600 424.8 81.3 106.9 97.4 0600 424.7 80.9 106.5 97.0 0700 424.9 81.2 106.8 96.0 0700 424.9 80.8 106.5 96.4  ;

0800 425.0 81.1 106.7 95.4 0800 0900 425.0 81.2 106.8 95.2 0900 1000 425.0 81.6 107.2 95.0 1000 1100 424.7 81.7 107.3 95.0 1100 1200 424.3 82.0 107.6 95.0 1200 1300 423.7 82.2 107.8 95.2 1300 1400 423.1 82.1- 107.7 95.6 1400 1500 422.6 81.7 107.3 96.2 1500 I

1600 422.0 81.4 107.1 96.6 1600 1700 421.6 81.4 107.1 97.4 1700 1800 421.2 81.5 107.1 99.6 1800 1900 421.1 81.5 107.1 101.4 1900 2000 421.1 81.6 107.2 103.2 2000 2100 421.1 81.5 107.2 104.8 2100 2200 421.2 81.3 107.0 105.3 2200 2300 421.4 81.3 106.9 105.3 2300 0000 421.9 81.3 106.9 104.6 0000

  • Measured at one foot from the bottom at Buoy #1.
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CIRCULATING WATER DISCHARGE

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