ML20155J032
| ML20155J032 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/20/1988 |
| From: | Schmierbach M TENNESSEE VALLEY AUTHORITY |
| To: | Stewart P CHATTANOOGA, TN |
| References | |
| NUDOCS 8810250105 | |
| Download: ML20155J032 (6) | |
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TENN E30EE VALLEY AUTHORITY KNOXVILLE. TENNESSEE 379o2 OCT 2 01988 Mr. Philip L. Stewart, Manager Chattanooga Field Office Division of Water Pollution Control 2501 Milne Avenue Chattanooga, Tennessee 37406-3399
Dear Mr. Stewart:
SEQUOYAH NUCLEAR PLANT (SQN) - FISH COUNTS IN THE INTAKE FOREBAY AND DIFFUSER POND on August 1. TVA reported a kill of approximately 278 fish in the intake forabay which was apparently caused by low (0.2 - 0.5 ppm) dissolved oxygen (DO) levels in the water withdrawn from Chickamauga Reservoir.
In response to a request by Ann McGregor. TVA began making daily counts of dead fish in the intake forebay and the diffuser pond on t.ugust 3.
The numbers and kinds of fish counted in the intake embayment and diffuser pond from August 3 through September 14, are summarized by date in Tables 1 and 2, respectively. Overall, a total of 392 dead fish of 13 different
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specios were counted in the diffuser pond and 16,372 dead fish of 20 different species were counted in the intake embayment.
The latter total includes an estimated 14,153 small (1-3 inches) mixed Threadfin and Gizzard Shad. The remaining 2,615 fish were adults of all other species. The small shad appeared only during the first week of the counts and for the most part were congregated at the end of the intake channel where they were mixed with thousands of dead Corbicula making precise counts impossible, i
By the end of August, DO levels in the reservoir had improved dramatically and there was a c.orresponding reduction in the numbers of dead fish.
On August 31, the DO level in the reservoir on the oJtside of the skimer wall ranged from 9.4 ppm on the surface to 4.8 ppm on the bottom (15 meter depth).
On September 15. DO readings at seven stations in the intake forebay ranged from 5.8 to 4.2 ppm.
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- I An Ecual Opportunity Employer i
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OCT 2 01908 Mr. Philip L. Stewart Because of the improved conditions in the reservoir and plant intake, fish counts were tarininated on September 15.
If you or your staff have any questions regarding these matters, contact Abraham H. Loudermilk at (615) 632-6714 in Knoxville.
Sincerely,
. /r 5 Pau Schmierbach, Manager M
Enviroginfndal Quality U
Enclosures cc (Enclosures):
Mr. Br e R. Barrett, Director Water Management Division U.S. Environmental Protection Agency Region IV 345 Courtland Street, NE.
Atlanta, Georgia 30365 Ms. 3. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Comnission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Int.pection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW., Suite 2900 Atlanta, Georgia 30323 I
Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy Tennessee 37379 Continued on page 3
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Mr. Philip L. Stewart 00T 2 01988 Mr. Ralph M. Sinclair Manager, Permits Section Division of Water Pollution Control Tennessee Department of Health and Environment TERRA Building 150 Winth Avenue, North Nashville, Tennessee 37219-5404 j
U.S.NuclearRegulatory_ Commission!
Attention:
Document Control Desk Washington, D.C.
20555 Mr. David Young. Fish Habitat Biologist Tennessee Wildlife Resources Agency 216 East Penfield Street crossville, Tennessee 38555 l
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TABLE 1 Species and Numbers of Dead Fish Observed in Sequoyah Nuclear Plant intake Embayment, August 3 through September 14, 1988 Species Survey Dates 8/3 8/4 8/5 8/6 8/7 8/8 8/9 8/10 8/11 8/12 8/13 8/14 8/15 Freshwater Drum 28 27 13 33 94 201 16 12 9
17 11 1
Bullh:ad 1
Cizzced Shad 132 233 170 126 136 121 162 230 1
6 Lorgemouth Bass 8
3 9
5 18 5
1 l
Blu: sill 8
14 20 1 *t 1
I Yo11cw Bass 2
Skipjeck Herring 12 8
27 38 8
Blua Catfish 1
1 1
2 2
Chinn31 Catfish 1
1 3
2 1
4 Sunfish 7
1 1
6 6
6 9
Stripcd Bass 1
1 1
Yollow Perch 1
1 2
1 1
2 33 2
Whito Bass 2
1 R:dbecast Sunfish 1
1 Spotted Bass 31 1
1 Whito Crappie 1
1 1
1 Ficthsad Catfish 2
1 Warmouth 1
Black Crappie 2
small Mixed Shad 3000 1500 1500 200 200 2300 3500 300 928 463 262 l
Totels 3191 1773 1733 418 485 2657 3687 552 997 493 285 3
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TABLT 1 (Cor
'1 Species and Wu s er '( P W
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9h Wuclear H snt Int
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Species
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8/16 8/'7 8/1^
5, 3 r28 t 't.
1/' 1: 11s Frcchwater Drum 2
t 1
1 543 Bullh:ad 4
1-
. Gizaced she 1,317
) L:rgemot n Jass 4
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'54
! Blu: sill' 54 4 Yollow Bass 2
.i Skipjeck Herring 93
! Bluo Catfish 2
1 11 Ch:nns1 Catfish 13 Sunfish 36 Striped Bass 3
Yellow Perch 43
' Whito Bass 1
4 R:dbecest Sunfish 2
! Spottcd Bass 33 Whito Crappie f
4 i F1sthsed Catfish 3
j Wermouth 1
i Black Crappie 2
i Small Mixed Shad 14.153
- Totals 9
5 1
2 11 60 1
1 1
1 16,372 1
1
- No survey done on 9/2/88; no dead fish observed on other dates not listed.
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TABLE 2 Species and Numbers of Dead Fish Observed in Sequoyah Nuclear Plant Diffuser Pond, August 3 through September 14, 1988 l
l Species Survey Dates
- Totals 8/3 8/4 8/5 8/6 8/16 8/17 9/1 9/3 9/4 i
Threadfin Shad 2
2 Freshwater Drum 20 20 Bullhead 3
3 1
1 8
l Gizzard Shad 15 12 3
204 63 297 Largemouth Besu 5
5 Bluegill 33 1
4 5
43 Yellow bass 1
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Green Suniish 1
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Channel Catfish 2
1 3
Carp 1
1 Blue Catfinh 7
7 Sunfish 3
3 I
White Bass 1
1 1
j Totals 77 12 8
1 217 64 4
8 1
392
- No survey done on 9/2/88; no dead fish observed on other dates not listed.
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