ML20207H698
| ML20207H698 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 08/17/1988 |
| From: | Diederich G COMMONWEALTH EDISON CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8808290291 | |
| Download: ML20207H698 (5) | |
Text
l)M Commonwealth Edison LLSalle County Nucle:r Station FRIORITY ROUTIliG Rural Route #1, Box 220 7 ein r
MarseiWes, Illinois 61341 Vto. ico k h, Telephone 815/357-6761 Phgrr f
su M August 17, 1988 pg(,,f /
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Mr. A. Bert Davis Regional Administrator Region III U.S. Nuclear Regulatory Commission 199 Roosevelt Road Glen Ellyn, Illinois 60137 This Special Report is being submitted in accordance with LaSalle Unit 1 and 2 Operating License NPF-ll and NPF-18, Appendix B (Environmental Protection Plan), paragraph 4.1 regarding a fish kill related to plant operation.
On July 18, 1988 at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> with Unit 1 in Operational Condition 1 (Run) at 73 percent power and Unit 2 in Operational condition 1 at 60 percent power, a small number of dead fish were observed floating into the Gizzard Shad barrier nets in the intake canal of the LaSalle County Cooling Pond (ultimate heat sink) (NN]. A representative of the Illinois Department of Conservation was contacted and identifications and counts of the dead fish were made from July 18 through July 21.
A total of 2,158 fish were counted, identified, and disposed of.
The dead fish caused no damage to the barrier net or to plant equipment.
The die-off in the cooling pond was caused by high water temperatures pond wide and/or low dissolved oxygen concentrations in some fresh refuge areas.
These conditions resulted from unusually warm weather combined with two unit operatitu during which one of the units was restarted following a refuel outage. The majority of fish that died were of coolwater species (94% of total lost) which were stocked in the cooling pond on an experimental basis.
Since the conditions that caused the die-off cannot be avoided with unit operation during unusually warm weather, a possible approach to limiting the number of fish 1 cst would be to limit or suspend stocking of coolwater fish species. This option is under consideration at this tima pending a fall fish population study by the Illinois Department of Conservation, f$-
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G. J. Diederic g
Station Manager LaSalle County Station GJD/kg d
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8808290291 800817 PDR ADOCK 05000373 S
PNU AUG 191988
DEVIATION REPORT DVR NO.
01 - 01 88 - 060 STA UNIT YEAR NO.
PART 1 l TITLE OF DEVIATION OCCURREO 7/18/88 1600 Coolina Lake Fish Kill DATE TIME SYSTEM AFFECTED PLANT STATUS Ai IIME OF EVE.1T TM gjg MODE 1/1 POWER (O 73/60 WORK REQUEST NO.
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DESCRIPTION OF EVENT On 7/18/88 at approximately 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> several dead game fish were observed by the Maintenance Staf f in the shad net area of the cooling lake. The District Fisheries Biologist was notified on 7/19/88. It was determined that a significant nurter of fish had died and the Biologist began a count on 7/20/88.
NRC notification per attached.
N0 y
- YES xg POTENTIALLY SIGNIFICANT EVENT PER NSD OIRECTIVE A-07 10CFR50.72 NRC RED PHONE l
l Charles Sprunger 7/22/88 p
ly NOTIF! CATION MADE l
l l X TIME RESPONSIBLE SUPERVISOR DATE PART2l OPERATING ENGINEER'S C0fmENTS
- None, NON REPORTABLE EVENT g
g
- 30 DAY REPORTABLE /10CFR REGION III DATE TIME 5 DAY REPORT PER 10CFR21 g
g NSD DATE TIME l
ANNUAL /SPECIAL REPORT REQUIRED l X CECO CORPORATE NOTIFI(.Aliv.: MADE F ABOW NOTIMCATM IS M MR21 A.I.R. #
TELECOPY CECO CORPORATE OFFICER DATE TIME i
PRELIMINARY REPORT COMPLETED AND REVIEWED B. Westphal 7/23/88 OPERATING ENGINEER DATE m
E E Y S A ION
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D ~/ 7'- 3 0 ff h1 3-j
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RESOLUTION APPROVED AND
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AUih0RIZE0 FOR DISTRIBUTION hTd w' l1 7'8
' 'SIff!ON MANAGER DATE C3-5176 (Form 15-52-1) 11-20-85 l
DOCUMENT 10 0386p
DEVIATION INVESTIGAi!ON REPORT (DIR)
Facility Name PAGE LaSalle County Station Unit 1 1 10Fl 0 1 3 Title EVENT DATE OIR NUMBER REPORT DATE OPER W G REVISION y// SEQUENTIALy//
MODE NUMBER NUMBER MONTH DAY YEAR 1
MONTH DAY YEAR STA UNIT YEAR POWER 01 0 01 8 11 7 81 8 01113 0 1 61 0 01 7 11 8 81 8 01 1 01 1 81 8 CONTACT FOR THIS DIR NAME TELEPHONE NUMBER AREA CODE Charles Sprunger. Technical Staf f Enoineer, extension 779 8l115 3I5l7l-l617l611 COMPLETE ONE LINE FOR EACH COMPONENT FAI URE DESCRIBE 0 IN THIS REPORT
.CAUSE SYSTEM COMPONENT MANUFAC-REPORTABLE CAUSE SYSTEM COMPONENT MANUFAC-REPORTABLE TURER TO NPRDS TURER TO NPR03 C
NlN l l l l l l l
l l l l l l 1
I I I I I I I
I I I I SUPPLEMENTAL REPORT EXPECTED MONTH DAY YEAR EXPEC E SUBMISSION DATE l
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l YES (if yes, conclete EXPECTED SUBMISSION DATE) l N0 TEXT Energy Industry Identification System (E!!S) codes are identified in the text as (xx]
PLANT AND SYSTEM IDENTIFICATION General Electric - Boiling Water Reactor Energy Industry Identification System (EIIS) codes are identified in the text as (XX).
A.
CONDITION PRIOR TO EVENT Unit (s):
1/2 Event Date:
7/18/88 Event Time:
1600 Hours Reactor Mode (s):
1/1 Mode (s) Name:
Run/Run Power level (s):
731/60%
B.
DESCRIPTION OF EVENT On July 18,1988 at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> with Unit 1 in Operational Condition 1 (Run) at 73 percent power and Unit 2 in Operational Condition 1 at 60 percent power, a small nunter of dead fish were observed floating into the Gizzard Shad barrier nets in the intake canal of the LaSalle County Cooling Pond (ultimate heat sink) (NN). A ripresentative of the Illinois Department of Con?ervation was contacted and identifications and counts of the dead fish were made from July 18 through July 21. A total of 2,158 fish, conprised of eight species of fish were recorded. The counts are as follows:
a DEVIAT10N INVESi!GATION REPORT TEXT CONTINUATION FACILITY NAME DIR NUMBER PAGE SEQUENTIAL REVISION STA UNIT YEAR NUMBER NUMBER 01 0 2
0F 0l3 LaSalle County Station Unit 1 01 1 01 1 81 81 - 0I610 IEXT Energy Industry Identification System (E!!S) codes are identified in the text as (xx)
B.
DESCRIPTION OF EVENT (Continued)
SPECIES NUMBER SIZE RANGE Walleye 1,8%
1/2 - 8 lbs Hybrid Striper 153 4 - 10 lbs Gizzard Shad 55 Largemouth Bass 47 2 - 9 lbs White Bass 10 Yellow Bullhead 10 Channel Catfish 10 Muskie 7
33 - 38 inches Due to the state of decorgosition it is likely that the die-of f began sometime on July 17 and was cor@lete by the evening of July 18. The fish were all collected on the cool side of the cooling pond, mostly along the barrier net and the public launching area. The dead fish did not have an affect on plant operation and were removed from the pond and disposed of during the counting process.
C.
APPARENT CAUSE OF EVENT The die-off in the cooling pond was caused by high water tergeratures pond wide and/or low dissolved oxygen concentrations in some fish refuge areas. A nureer of factors lead to the conoitions that occurred. The heat load in the pond had increastd due to a Unit 1 initial increase in power following a refueling outage. Power was increased f ran 233
- on July 12 to 950 N on July 16 where it remained until July 18. Unit 2 cycled in power between 800 W and %0 W during the same time period. Air J
temperatures were in the upper 90's during the proceeding week and were over 100 degrees F on July 15.
Low cloud cover was present and high htrnidity conditions from July 17 through 18. On July 18, water tergeratures at the intake canal were 90 to 91 degrees F.
The fish that died in the highest nutters were the Walleye and Hybrid Striped Bass, which are considered to be coolwater fish. Only seven Muskie, another coolwater fish, were found, but that is probably related to the f act that very few Muskie were in the pond. These three terverature sensitive fish probably moved into the coolest part of the pond as it began to heat up and died when they could not find cooler water. The other species lost, like the Largemouth Bass and Channel Catfish, could survive the tergeratures, but were most likely trapped in a refuge area that had low levels of dissolved oxygen.
D.
SAFETY ANAtYSIS OF EVENT There were no safety consequences to the station as result of this event. The dead fish that were found in the Girrard Shad barrier net caused no damage to the net or to plant equipment.
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DEVIAi!0N INVESTIGATION REPORT TEXT CONTINUAi!0N 1
FACILITY NAME DIR NUM8ER PAGE i
SEQUENTIAL
_lREVISION STA UNIT YEAR NUM8ER NUM8ER l
01 0 3
0F 013 l
LaSalle County Station Unit 1 01 1 01 1 81 8 01610 TEXT Energy Industry Identification System (E!!S) codes are identified in the text as (xx) t t
E.
CORRECTIVE ACTIONS 4.
The dead fish were removed from the Gizzard Shad barrier not and disposed of in a timely manner.
High water tenperatures pond wide and low dissolved oxygen concentrations cannot be avoided with plant-L operation during unusually ~wam wather. The majority of fish that died are of the coolwater species
.which were stocked in the coollr.g pond on an experimental basis. A possible approach to Ilmiting the nueer of fish lost to plant operation during these conditions would be to Ilmit or suspend stocking of coolwater fish species., this option is under consideration at this time pending a fall fish population study at LaSalle Station's cooline pond by the Illinois Department of Conservation.
F.
PREVIOUS EVENTS j
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There are no previous events.
G.
COMPONENT FAILURE DATA 3
No conponent failures occurred contributing to this event.
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