ML19326B629
| ML19326B629 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/14/1975 |
| From: | Murphey W, Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326B628 | List: |
| References | |
| NUDOCS 8004160402 | |
| Download: ML19326B629 (3) | |
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Non-Routine, Non-Radiological Environmental Report No. 80-313/75-7 2.
Report Date:
2/14/75 3.
Occurrence Date:
2/8/75 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville,. Arkansas 5.
Identification of Occurrence:
Fish impinged on intake screens exceeding 3000 pounds based on 24-hour sample period.
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Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2500 MNth Hot. Standby Net. Output 840 MWe Cold Shutdown Percent of Full Power 99 %
Refueling Shutdown Routino Startup Operation
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Routine Shutdown
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Operation Load Changes buring Routine Power peration Other (Specif' )
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Description of Occurrence:
i During routine fish impingment monitorin'g 2/8/75, using procedure 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, 4050 pounds of fish were collected during a 24-hour sample period.beginning at 8:00 a.m.
2/7/75 and ending at 8:00 a.m. 2/8/75. A mixture of gizzard and thread-
. fin shad made up 99.8% of the ' total weight of fish. Other fish made up 0.2% of the total weight. Threadfin shad made up 92% of ~the total number of shad. Temperatures taken at 8:00 a.m. 2/8/75:
intake temperature -
44.7"F and ambient air temperature - 24*F.
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40 6 16o0 00 July 5, 1974 NSP-10, Rev. O Page 1 of 3
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-7 S.
Designation of~ Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Installation /
Environmental Construction Component Failure Operator Other (Specify)
X The apparent cause was due to a natural die off of threadfin shad during the winter season.
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Analysis of Occurrence:
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The only noticeable Environmenta.1 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. The fish that were not collected were disposed of'through the trash disposal system.
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- 10. Correc.ve Action:
Long term studies are in progress to determine the effects of plant opbration on the aquatic ecosystems of the Dardanelle Reservoir.
Data 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 might be taken to reduce plant effects on the Reservoir.
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v July 5, 1974 NSP-1D, Rev. O Page 2 of 3
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iv Non-Routine, Non-Radiological Environmental Report No. 50-313/75-7 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 50-313/75-6.
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Reviews and Approvals:
Reviewed and Approved by: Plant Safety Committee Yes (X)
No ( )
Plant Superintendent Yes (X)
No ( )
Reference:
JWA-866 Date: 2/13/75 Reviewed by:'
Az Date:
V 7d" Licensing Supervisor Approved by:
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Date: O ~ M ~' S 5
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Safety Review Committee h V /p,5 ~
Approved by:
Date:
h fanager of pucicar Services Approved by 4x%'?_.[ 6
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Date:f7 -/I~ 2
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Director of Power Production Approved by:
./ / /66 Date: J//F[7$
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1 July S, 1974 NSP-10, Rev. O Page 3 of 3
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