ML19319E400
| ML19319E400 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/24/1975 |
| From: | Phillips J, Woodward J ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E382 | List: |
| References | |
| NUDOCS 8004100686 | |
| Download: ML19319E400 (3) | |
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Non-Routine,.Non Radiological Environmental Report No.
50-313/75-18 2.
Report Date:
2/24/75 3.
Occurrence Date:
2/19/75 4.
Facility:
_ Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Fish kill on intake screens exceeding 3000~ pounds based on 24-hour sample period.
6.
Conditions Prior to Occurrence:,
Steady-State Power X
Reactor Power 2543 MNth
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Hot Standby Net. Output 839 MNo Cold Shutdown Percent of Full Pcuer 99 % -
Refueling Shutdown Routine Startup Operation Routino Shutdown
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s Operation Load Changes During Routine Power Operation Other (Specify)
Four circulating water pumps were in operation.
7.
Description of Occurrence:
i During routine fish impingement monitoring 2/19/75, using 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, procedure 5675 pounds of fish were collected during a 24-hour sample period beginning at 8:00 a.m. 2/10/75 and ending at 8:00 a.m. 2/19/75.
A mixture of ~threadfin and gizzard shad made up 99.9% of the total weight of fish.
made up 0.1% 'of the total weight.
Other fish total number of shad.
Threadfin shad made up 99% of the Intake water temperature taken at 8:00 a.m. 2/19/75 was 45'F, and ambient air temperature was 29'F.
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July S, 1974 NSP-10, Rev. O page 1 of 3
-3 Non-Routine, Non-Radiological Environmental Report No. 50-313/75-18 8.-
Designation of Apparent Cause* of Occurrence:
Design
' Proc' dure e
Manufacture
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Unusual Service Condition Including Installation /
Environmental
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Construction Component Failure ^
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' Operator Other (Specify)
X The apparent cause was due to a natural die off of threadfin shad during the winter season.
9.
Analysis of Occurrence:
gs The only noticeable environmental impact was the removal of the above mentioned fish from the lake. The fish that were collected were dis-posed of through land fill operation.
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10.
Corrective Action:
Long term studies are in progress to determine the effects of plant operation on the aquatic ecosystems of the Dardanelle Reservoir.
Data
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from this report and other data obtained is fed back into these studies to determine what changes might be made to the studies'in order to ensure that adequate data is obtained for evaluating plant impact.
Review by Arkansas Power G Light Company and its consultants of the results of these studies will determine what corrective action mig:.t be taken to reduce plant effects on the Reservoir.
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I July.5, 1974 NSP-lb, Rev. O Page 2 of 3
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-18 11.
Failure Data:
The circumstances of this report are similar to those reported in Non-Routine, Non Radiological Environmental Reports No. 50-313/75-1 through 50-313/75-17.
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12.
Reviews and Approvals:
i Reviewed and Approved by: Plant Safety Committec Yes @)
No ( )
Plant Supe:intendent Yes ( ))
No ( )
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Referenec:
JWA-878 Date: 2/21/75
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Reviewed by:_
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Dato: 2 6 -/[
Licensing' Supervisor Approved by:
gnMI. / o-aI e
Date:
F/2 /[7)
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Safety Review CommifY[c " #
i Approved by:
ba-Date:
M J lanager 'of Nucicar Services s
hpProvo )Y: I]ans fd / e-b A J m Dato:
k/>105 Mirector of Power.Productic'n Approved by:
,t Ecl
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Date: 2
'I Senior Vice Pr"c' sider.:
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July 5, 1974 NSP-10, Rev. O Page 3 of 3 i
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