ML19320A036
| ML19320A036 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/11/1974 |
| From: | Reuter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A027 | List: |
| References | |
| NUDOCS 8004140657 | |
| Download: ML19320A036 (3) | |
Text
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Non-Routine, hon-Radiological Environmental Report No. 50-313/74-4 2.
Report Date:
12/11/74 3.
Occurrence Date:
12/3/74 l
4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas f..
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Identification of Occurrence:
Fish kill on Intake Screens exceeding 3000 pounds based on an 8-hour I
sample period.
6.
Conditions Prior to Occurrence:.
Steady-State Power X
Reactor Power 1854 MWth Hot Standby Net. Output 660 MWe Cold Shutdown Percent of Full Power 75 Refueling Shutdown Routine Startup Operation s-n-
Routine Shutdown
.a Operation Load Changes During Routine Power Operation Other (Specify)
Three circulatfng water pumps were in operation.
7.
Description of Occurrence:
During routine fish impingement monitoring 12/3/74, using procedure 1607.10 (Monitoring Fish Impingeil on ANO Intake Screens), 2187 pounds, r
13 ounces of fish were collected during an 8-hour sample period. The projected fish kill for the 24-hour period beginning at 8:00 a.m.
12/3/74 and ending at 8:00 a.m.12/4/74 was 6560 pounds based on the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> sample. A mixture of gizzard a.;d threadfin shad made up 99% of the total weight of fish. Other fish made up 1% of the total weight.
Threadfin shad made up 92% of the total number of shad.
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8004140457 July S, 1974 NSP-10, Rev. O Page 1 of 3
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Non-Routine, Non-Radiological Environmental Report No. 50-313/74-4 8.
Designation of Apparent Cause of Occurrence:
Procedure Design Manufacture Unusual Service Condition Including Installation /
Environmental Construction Component Failure Operator l
Other (Specify)
X t
The apparent cause was due to a decrease in lake water temperature caused by cold weather.,
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Analysis of Occurrence:
l The only noticeable Environmental Impact was the removal of the above '
mentioned fish from the lake. He fish that were collected were dis-posed of through landfill operation. We fish that were not collected were disposed of through the trash disposal system.
- 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 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
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impact. Review by AP6L and its consultants of the results of these studies will determine what corrective action might be taken to reduct
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plant effects on the Reservoir.
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Non-Routine, Non-Radiological Environmental Report No. 50-313/74-4 11.
Failuro Data:
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The circumstances of this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No. 50-313/74-1, 50-313/74 2, and 50-313/74-3.
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Reviews and Approvals:
Reviewed and Approved by: Plant Safety Committec Yes 6 )
No - ( )
Plant Superintendent Yes ( X)
No ( )
Reference:
JWA-715 Date: 12/9/74 Reviewed by:
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!! ate: /
/ 7V 2
',J Licensing Supervisor Approved by:l, f2Y/ //
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, Date: /[ -/7 - 2/
5dfEty Review!.Cbinmittec 7
Approved by:
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Date: < /- /
Manager of Nucle r Service.
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Approved by: / $.b /d'///[
Date: /7 vi ~~7 'f
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Director o(Power ProdtIction Approved by:
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. /$f Date: /2
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Senior Vice P'rcsident.
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