ML20101T111
| ML20101T111 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 07/14/1992 |
| From: | Skolds J SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Krecker W SOUTH CAROLINA, STATE OF |
| References | |
| ONO-920051, NUDOCS 9207200279 | |
| Download: ML20101T111 (9) | |
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, . V fa, i t Qg. ** 1V 2 ? -1 South C:stlins El;ctric & Gas Ccmpany - John L Skolas :
P-O. Box 68 : - - = Vee Premnt
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s, i = Jenkmsvme. SC 29065.. Nuclest Operanons
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-(303) 34$.4040_ :
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_ July;14,~1992 L I LMr.LWilliam R.EKrecker- ~
- 3. Env_ironmental:,Qu'ality Manager
.?
l Water-Quality 1A:sessment & Enforcement .,
-Division South Carolina Departmen. f Healtn-1
' .. & Environmental Controi
- : ' 2600 Bull Street , .
l st ' LColumbiah South Carolina 29201-- '
Dear Mr.:
Krecker: ;
Subject:
VIRGIL C.LSUMMER HUCLEAR~ STATION' 0!SCHARGE BAY; FISH KILL (ONO 920051)
] 2
-JULY C-9, 1992 SouthlCarolina-Electric & Gas Company'.(SCE&G) herewith submits a report Leoncerning-a recent1 fish kill whicn occurred in the circulating water s
,< :1.
- discharge: bay of the: Virgil C.-Sumer NucMar_ Station (VCSNS). The enclosed '
- : report describes'.the eventLand-probable cause.
7,u a , N SCE&G-will: continue to monitor.: temperature'and flow-conditions within the _, area as.previously, discussed with South Carolina Department of Health-and WW ',
" EnvironmentaliControl and South Carolina Department of. Wildlife!and Marine LResources.
~
LIn"accordance with:the VCSNSL0perating License NPF-12,l Appendix B, a copy of - m .
!this reportits being provided to the'Nucleaa Regulatory Commission..
Additionally, a copylof;the' report will bc provided to the South, Carolina
, Department'of Wild 11feLand Marine Resources per the rguest of Mr. H. J.
? Logan, J Chief f of; Fish'eries.
y If you;have:anyl questions please call'Ms. Susan "eese at?:345-4591. g , . Very)truly yours, l' ~ g, , John!L. Skolds SBR: led
- Enclosure j
y- ,
' ;c: W. Mn Lide Jr. Central Midlands District :
Gj " 'LV A?: Blue. .
. Dick Christie
> :R.(R.oMahan '" NSRC?
LS. E. Sumer RTS (0NO920051) W esentEcontroY Desk File (809.06-1 & 818.05) y .NRC N sident: Inspector-- 1-g, > w Ijl JjWQ G *q_
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-9207200279 920714 _I PDR.:ADOCK 05000395 / -
S .PDR ;l' h} 4'et 4 Q-NUCLEAR EXCELLENCE 1A SUl#4ER TRADITION! %A dim e w
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j Fish Kill Report 1/8/92 A limited fish kill was discovered in the Virgil C. Summer Nuclear Station (VCSNS) circulating water discharge bay on 7/8/92. The apparent cause is thermal shock from increasing c;rculating water discharge temperatures combined with fluctuating water levels in Monticello Reservoir. Increasing oischarge temperatures are a result of overall warming of the reservoir in the summer months. Fluctuating reservoir levels are cauwd by the op, ion of Fairfield P9mped Storage Facility. There were no unusual discharges from VLSNS which could have contributed to the kill. VCSNS operated at approximately 100% power throughout the timd peric,d in question. Table 1 shows the numbers and identification of the fish killed. Figure i : nows the location of tne fish kill. Table 2 presents lake level and circulating water intake and disr.harge t'emperatures from S - 8 July,1992. Based on the temperature data presented in Table 3, the fish were probably killed late at night on 7/7/92 when the discharge bay bottom temperature reached 101.7 F. The time of hottest discharge bay bottom temperatures correlates with low reservoir levels. Figure 2 shows the lake levels and the corresponding discharge bay bottom temperatures. More detailed data is available and will be presented to the South Carolina Wildlife and v Marine Resources Deoartment and the South Carolina Department of Health and Environmental Control with t he annual fish kill data summary in the fall of 1992. n L H. Nagle 1
}
'M Table 1 8 July 1992
# Fish Species Size Ranae 3 gizzard shad 11 - 13 inches 5 thread fin shad 2 - 3 inches 1 bluegill 4 inches 1 largemouth bass 10 inches e
1 1 black crappie 4 inches 2 blar.k crappie 10 inches e 9 channel catfish 7 - 11 inches 8 channel catfish 12 - 16 inches 61 white catfish 6 - 11 in:nes -
- 3. white catfish 12 inches Total # of Fish = 94
, - - - - - _ _ - - . - .___.A--___.-__--_--_--_._-.___---___- - - _ _ _ _ - - . - . - _ - . - - -
TABLE 2 Lake Level intake' Discharge
- Lake Level intake' Discharge' Date Hour (Feet) Temp *F Temp *F Date Hour (Feet) Temp "F Temp 'F 7/5/92 0000 422.8 l 79.4 105.2 7/6/92 423.5 0000 l l 77.7 103.4-0100 422.8 79.3 105.0 0100 423.7 77.4 103.1 0200 422.9 79.1 104.8 0200 424.0 77.2 102.9 0300 423.1 78.8 104.6 0300 424.2 77.0 102.7 0400 423.3 78.2 104.0 0400 424.5 76.6 102.3 0500 423.7 77.5 103.3 0500 424.7 76.5 102.2 0600 424.2 77.8 103.6 0600 424.9 76.5 102.2 0700 424.6 77.5 103.3 0700 425.0 76.3 102.1 0800 424.8 77.4 103.2 0800 425.0 76.4 102.1 0900 424.9 76.9 102.7 0900 425.0 76.5 102.2
~
1000 424.8 77.1 102.9 1000 425.0 76.9 102.6 1100 424.7 77.8 103.6 1100 425.0 77.7 103.5 1200 424.5 77.7 103.5 1200 425.0 78.5 104.3 1300 424.4 78.4 104.2 1300 425.0 78.2 103.9 1400 424.2 78.8 104.6 1400 424.8 78.1 103.8 , 1500 424.1 78.0 103.8 1500 424.6 78.5 104.2 1600 424.0 77.8 103.6 1600 424.5 79.0 104.7
~
1700 423.8 77.9 103.7 1700 424.3 79.2 104.9 1800 423.5 77.8 103.6 1800 424.1 79.3 105.0 1900 423.3 77,9 103.6 1900 424.1 79.5 105.2
^
2000 423.3 77.8 103.5 2000 424.0 79J7 105.4 2100 423.3 77.7 103.4 2100 424.0 79.2 104.9 2200 423.3 77.5 103.2 2200 424.0 79.0 104.7 2300 423.3 102.9 2300 424.0 l 77.2 79.4 105.1
- Circulating water temperature measured at the main condensers.
TABLE 2
, , (Continued)
Lake Level intake' Discharge
- Lake Level intak e
- Discharge
- Date Hour (Feet) Temp 'F Temp 'F Date Hour (Feet) Tert p *F Temp *F 7/7/92 0000 424.0 79.8 105.5 421.3 105.9 7/8/92 l 0000 l l 80.2 0100 424.1 79.8 105.5 0100 421.7 79.3 105.0 0200 424.2 79.1 104.8 0200 422.2 78.4 104.1 0300 424.3 78.7 104.4 0300 422.7 77.9 103.6
~
0400 424.4 78.8 104.5 0400 423.2 77.6 103.4 0500 424.5 78.8 104.5 0500 423.7 77.4 103.1
'0600 424.6 78.0 104.5 0600 424.1 77.3 102.9 0700 424.7 78.7 104.4 0700 424.5 77.2 102.9 0800 424.7 78.6 104.3 0800 424.7 77.1 102.8 0900 424.7 79.1 104.8 0900 424.9 77.1 102.8 1000 424.7 79.8 105.5 1000 425.0 77.2 103.0 1100 424.7 80.3 106.0 1100 425.0 78.3 104.0 1200 _424.6 80.7 106.4 j1200 424.9 78.0 103.7 1300 424.4 80.8 106.5 1300 424.7 78.7 104.3 1400 424.1 80.3 106.0 1400 424.4 79.1 104.8 1500 423.7 79.9 105.6 1500 424.1 77.8 103.5 1600 423.3 105.3 1600 423.9 l 79.6 77.4 103.1 1700 422.8 73.4 105.1 1700 423.4 77.8 103.5 1800 422.3 79.4 105.1 1800 423.0 78.2 103.8 1900 421.9 79.4 105.1 1900 422.5 78.2 103.9
~
2000 421.4 79.4 105.1 2000 422.1 78.2 103.9 2100 421.3 79.5 105.2 2100 422.0 78.3 104.0 2200 421.1- 30.0 105.7 2200 421.8 78.1 103.8 2300 421.0 80.0 105.7 2300 421.7 78.3 104.0
- Circulating water temperature rnessured at the rnain condensers.
L u l l l
TABLE 3
+ . .
Bay Bay Lake Level Bottom Lake Level Bottom Date Hour (Feet) Temp *F Daa Hour (Feet) Temp *F 7/5/92 0000l 422.8 l 95.8 7/6/92 0000 423.S 92.8 0100 422.8 96.0 0100- 423.7 91.8 0200 -422.9 95.8 0200 424.0 91.4 0300 423.1 95.0 0300 424.2 90.4 0400 423.3 94.2 0400 424.5 90.4 0500 423.7 93.6 0500 424.7 90.4 0600 424.2 92.8 0600 424.9 90.6 0700 424.6 92.8 0700 425.0 91.0 0800 424.8 92.4 0800 425.0 91.4 0900 -424.9 91.8 0900 425.0 91.6 1000 424.8 91.2 1000 425.0 91.8 1100 424.7 90.6 1100 425.0 91.8 1200 -424.5 60.6 1200 425.0 91.8 1300 424.4 90.4 1300 425.0 91.6 1400 424.2- 90.4 1400 424.8 91.2 1500 424.1 90.6 1500 424.6 90.0 1600 424.0 91'.0 1600 424.5 89.6 1700 423.8 91'.2 1700 424.3 89.6 3 1800 423.5 91.6- 1800 424.1- 89.6 1900 423.3 92.0 1900 424.1 89.8 2000 423.3 92.6 2000 424.0- 90.0 2100- 423.3 93.2 2100 424.0 90.2 2200 423.3 93.4 2200 424.0 90.4-2300 423.3 93.6 2300 424.0 91.2 I J
y + TABLE 3
, (Continued)
Bay Bay Lake Level Bottom Lake Level Bottom Date Hour (Feet) Temp *F Date Hour (Feet) Temp *F 7/7/92 0000 l 424.0 l 91.6- 7/8/92 I 0000 421.3 100.6 0100 424.1 92.0 0100 421.7 99.0 0200 424.2 92.0 0200 422.2 97.6 0300 424.3 92.6 0300 422.7 96.0 0400 424.4 92.8 0400 423.2 95.2 0500 424.5 93.2 0500 423.7 93.6 0600 _424.6 92.6 0600 424.1 92.2 ; i 0700 424.7 0700 424.5 91.8 l 91.6 0800 424.7 91.8 0800 424.7 90.8 I 0900 424.7 91.6 0900 424.9 90.4 i 1000 424.7 91.4 1000 425.0 90.4 1100 424.7 91.2 1100 425.0 90.2 1200 424.6 91.2 1200 424.9 90.4-1300 424.4 91.4 1300 424.7 90.6 1400 424.1 91.6 1400 424.4 91.0 1500 423.7 91.8 1500 424.1 91.2 1600 423.3 92.2 1. 1600 423.9 91.4 1700 422.8 93.0 1700 423.4 92.0 1800 422 3 94.4 -1800 423.0 92.2 1900' 421.9 96.2 1900 422.5 93.2 2000 421.4 98.2 2000 422.1 94.6 2100 421.3 100.4 2100 422.0 96.4 2200 421.1 101.7 2200 421.8 97.8 2300 421.0 101.5- 2290~ 421.7 98.4 I __
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h r m . . -*m-tait t;tc;hey Natifi4_ HMi . w c nN W,*E4 .
".. ~ gENrk7.tpe+;; "_*_ (N M +E M pa +
.;.d ctytu"M..i(( Nf5 ibi.
7
t Figure 2 CIRC WATER DISHCARGE BAY TEMPERATURE / RESERVOIR LEVEL 105 - 426 FISH KILL 425 5 - 4? Igggsp,yggei: 1- - 8 JULY 1992
+ BUOY 1 - BAY BOTTOM TEMP E MONTICELLO RESERVOIR LEVEL i
- - - __:--__-____.}}