ML18096A136

NPDES Noncompliance Notification:On 910704-06,limited Fish Kill Discovered in Facility Circulating Water Discharge Bay. Caused by Thermal Conditions Due to Reservoir Drawdown

ML18096A136
Person / Time
Site:	Salem
Issue date:	07/11/1991
From:	Skolds J SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Krecker W SOUTH CAROLINA, STATE OF
References
NUDOCS 9107170117
Download: ML18096A136 (12)

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South Carolina Electric & Gas Company A'lrgil C. Summer Nuclear Station W,.O. Box88 Jenkinsville, SC 29065 (803) 345-5209 SCE&G (803) 634-2011 A st:IWll Company Mr. William R. Krecker Environmental Quality Manager Water Quality Assessment & Enforcement Division South Carolina Department of Health

& Environmental Control 2600 Bull Street Columbia, South Carolina 29201

Dear Mr. Krecker:

JUL J I 1991

Subject:

VIRGIL C. SUMMER NUCLEAR STATION DISCHARGE BAY FISH KILL (ONO 910038)

JULY 4-6, 1991 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 probable cause.

SCE&G will continue to monitor temperature and flow conditions within the area as previously discussed with South Carolina Department of Health and Environmental Control and South Carolina Department of Wildlife and Marine Resources.

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

Additionally, a copy of the report will be provided to the South Carolina Department of Wildlife and Marine Resources per the request of Mr. H. J.

Logan, Chief of Fisheries.

If you have any questions please call Mr. Charles McKinney at 345-4723.

CJM:JLS:lcd Enclosure c:

W. M. Lide, Jr.

L. A. Blue R. R. Mahan S. E. Summer Document Control Desk NRC Resident Inspector John L. Skolds Central Midlands District Dick Christie NSRC RTS (ONO 910038)

File (809.06-1 & 818.05)

IR EXCELLENCE - A SU~.MER TRADITION!

Fish Kill Report July 4-61 1991 At approximately 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br /> on July 4, 1991, a limited fish kill was discovered in the Virgil C. Summer Nuclear Station circulating water discharge bay. A total of fifty-two dead fish were collected, identified and measured immediately following the event. The decomposed state of the collected fish indicated that they were killed on approximately July 3, 1991.

An additional seven fish were collected on July 5, 1991. Also, on July 6, 1991, seventeen fish were collected. These were apparently killed on July 5, 1991, when temperature conditions in the discharge bay were similar to those recorded on July 3, 1991.

The investigation by plant personnel confirmed that there were no unusual discharges from the facility for th~ time period in question. Analysis of plant and reservoir conditions indicate that the cause of the fish kill was thermal in nature and coincided with reservoir drawdown.

The below listed attachments to this report provide a summary of data utilized during the investigation:

Table I Spe~ies and Size of Fish Table II Circulating Water Intake and Discharge Temperatures along with the Reservoir Level Figure I Location of temperature monitoring buoys in Circulating Water Discharge Bay and Canal Figure II Circulating Water Discharge Bay Temperature, Buoy #1, 1 Foot from Bottom Figure III Circulating Water Discharge Bay Temperature, Buoy #1, 10 Feet from Bottom Figure IV Circulating Water Discharge Bay Temperature, Buoy #2A, 1 Foot from Bottom Figure v Circulating Water Discharge Bay Temperature, Buoy #2A, 2 Feet from Bottom Figure VI Circulating Water Discharge Canal Temperature, Buoy #3, 1 Foot from Bottom Figure VII Circulating Water Discharge Canal Temperature, Buoy #3, 1 Foot from Surf ace Attachment I Meterological Conditions at the Time of the Fish Kill

TABLE I JULY 4-6, 1991 FISH KILL SPECIES NUMBER TOTAL LENGTH Channel Catfish 5

8 - 18 inches White Catfish 44 6 - 10 inches Gizzard Shad 18 11 - 14 inches White Bass 3

11 - 15 inches Sunfish 3

3 - 6 inches Unidentified Sunfish 3

3 inches

TABLE II RESERVOIR TIME INTAKE TEMP OUTLET TEMP LEVEL 07/03/91 12:50 79.5 105.7 424.39 13:50 79.2 105.3 423.90 14:50 79.3 105.4 423.39 15:50 79.8 105.9 422.87 16:50 80.l 106.2 422.38 17:50 79.9 106.1 421.97 18:50 79.8 106.0 421.71 19:50 79.3 105.5 421.50 20:50 78.6

-104. 7 421.44 21:50 78.7 104.8 421.47 22:50 79.3 105.4 421.63 23:50 79.9 106.0 421.94 07/04/91 00:50 78.3 104.4 422.31 01:50 78.5 104.6 422.72 02:50 78.0 104.1 423.10 03:50 77.8 103.9 423.48 04:50 77.8 103.9 423.86 05:50 77.6 103.7 424.24 06:50 77.6 103.7 424.60 07:50 77.6 103.7 424.94 08:50 77.7 103.8 425.13 09:50 77.8 104.0 425.13 10:50 77.9 104.l 425.00 11: 50.

77.7 103.9 424.83 12:50 77.2 103.3 424.64 13:50 77.3 103.4 424.49

SERVICE WATER POND - ~

DISCHARGE BAY (Location of-Fish Kill)

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FIGURE I

DISCHARGE CANAL --1---

MONTICELLO RESERVOIR Buoy #3 18 ft de p (full pee Temperature senso 1 ft from bottom 1 ft from surface

_...._Buoy #2A 18 ft deep { fu 11 po Temperature sensors:

• 1 ft from bottom 2 ft from bottom Buoy #1 38 *ft deep (full pool)

Temperature sensors:

1 ft from bottom 10 ft from bottom CIRCULATING WATER DISCHARGE

FIGURE II DE"G f~

1.1.0.00 94.00 BUOY tt1 1 FOOT FROM BOTTOM aJ DISCHARGE MY 86.00

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DEG F 11fLOO FIC-UPJ: I I I 102.00 94.00 BLDY tt1 10 FEET FRCM BOTTOM CW DISCHARGE BAY 80.00

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e ATTACHMENT I SOUTH CAROLINA ELECTRIC AND GAS -- v.c. SUMMER STATION METEOROLOGICAL DATA LISTING File: metcur60 Year: 1991 04:20:18 p.m. E.S.T.

Fri 05-JUL-1991 1991 186 16:20:18 jul-wind wind delta temperature pre-ian direction speed temperature (degrees F) cip.

day mo/day hr:mm (degrees)

(mph)

(degrees F) ambi-dew-figure 61m lOm 6lm lOm 10-61 10-40 ent point (inch)

=========== ----- -----

==============================

184 JUL 03 00:00 a.a 198. 5 0.00 4.91 0.00 0.00 79.19

71. 31 0.00 184 JUL 03 01:00 0.0 219.2 0.00 6.26 o.oo 0.00 '78;26

71. 76 0.00 184 JUL 03 02:00 a.a 240.5 0.00 4.31 0.00 o.oo

77. 23

71. 86 o.oo 184 JUL 03 03:00 a.a 104.1 o.oo 6.50 0.00 0.00 76.83 72.13 0.00 184 JUL 03 04:00 0.0 143.9 0.00 6.21 o.oo 0.00 75.28 71.94 0.00 184 JUL 03 05:00 0.0 181. 5 0.00 6.43 0.00 0.00 74.05

71. 67 0.00 184 JUL 03 06:00 0.0 179.4 0.00 3.75 0.00 0.00 73.90

71. 91 0.00 184 JUL 03 07:00 0.0 191. 3 0.00 4.42 0.00 0.00

74. 59 71.93 0.00 184 JUL 03 08:00 o.o 237.1 0.00 5.62 0.00 0.00 76.68

71. 29 0.00 184 JUL 03 09:00 0.0 230.8 o.oo 5.14 0.00 0.00 79.68 70.97 0.00 184 JUL 03 10:00 o.o 226.5 0.00 5.16 0.00 0.00 82.07 70.99 0.00 184 JUL 03 11:00 0.0 222.3 0.00 6.08 0.00 0.00 85.03 71.95 0.00 184 JUL 03 12:00 0.0 224.5 o.oo 6.57 0.00 0.00 87.12 72.45 0.00 184 JUL 03 13: 00 0.0 218.0 0.00 6.11 0.00 0.00 89.22 72.34 0.00 184 JUL 03 14:00 0.0 238.2 0.00.

6.20 0.00 0.00.90. 32

72. 33

!LOO 184 JUL 03 15:00 0.0 242.2 0.00 7.61 0.00 0.00

91. 50 70.50 0.00 184 JUL 03 16:00 0.0 241. 6 0.00 9.22 0.00 0.00

91. 89 68.05 0.00 184 JUL 03 17:00 0.0 252.9 0.00 8.01 0.00 0.00 92.29 67.83 0.00 184 JUL 03 18:00 0.0 251. 9 o.oo 7.13 0.00

o. a*a 91.60 67.79 0~00 184 JUL 03 19:00 o.o 227.3 0.00 4.95 0.00 0.00 90.21 69.36 0.00 184 JUL 03 20:00 0.0 211. 3 0.00 4.73 0.00 0.00 87.55

71. 58 o.oo 184 JUL 03 21:00 0.0 198.4 o.oo 5.13 0.00 0.00 8~.60 71.11 0.00 184 JUL 03 22:00 0.0 190.2 o.oo 4.35 0.00 0.00 83.98 71.87 0.00 184 JUL 03 23:00 o.o 176.9 0.00 6.35 o.oo 0.00

81. 38 73.06 0.01 185 JUL 04 00:00 0.0 164.9 0.00 7.59 0.00 0.00 79.64 72.62 0.00 185 JUL 04 01:00 o.o 178.9 0.00 10.23 0.00 0.00 78.33 71.89 0.03 185 JUL 04 02:00 o.o 178.1 0.00 13.68 0.00 0.00 75.63 71.06 0.00 185 JUL 04 03:00 o.o 179. 8 0.00

11. 54 0.00 0.00 74.52 70.89 0.00 185 JUL 04 04:00 o.o 187.5 0.00 10.64 0.00 0.00 74.79 70.58 0.00 185 JUL 04 05:00 0.0 205.9 o.oo 6.79 0.00 0.00 74.46 70.76 0.00 185 JUL 04 06:00 0.0 238.6 0.00 4.53 0.00 0.00 74.14 70.68 o.oo 185 JUL 04 07:00 0.0 208.5 o.oo 5.90 0.00 0.00 75.03 71.14 0.00 185 JUL 04. 08:00 0.0 196.6 o.oo 9.07 0.00 0.00

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72. 25 0.00 185 JUL 04 09:00 0.0 226.0 0.00 6.14 0.00 0.00 79.63 73.47 Q'; 00 185 JUL 04 10:00 0.0 197.8 o.oo 6.11 0.00 0.00

81. 45 73.81 0.00 185 JUL 04 11:00 0.0 201.4 o.oo 6.69 0.00 0.00 83.62

73. 79 0.00 185 JUL 04 12:00

o. o* 201. 1 0.00 7.04 0.00 0.00 85.25 73.91 0.00 185 JUL 04 13:00 0.0 207.6 0.00 7.50 0.00 0.00 87.35 73.43 0.00 185 JUL 04 14:00 0.0 220.6 0.00 6.16 0.00 0.00 87.88 72.83 0.00 185 JUL 04 15:00 0.0 248. 4 0.00 7.07 0.00 0.00 87.15 72.00 0.04 185 JUL 04 16:00 0.0 115. 7 0.00 8.15 0.00 0.00 '79.92 70.90 0.63

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