ML19326B647
| ML19326B647 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/14/1975 |
| From: | Murphy W, Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326B646 | List: |
| References | |
| NUDOCS 8004160418 | |
| Download: ML19326B647 (3) | |
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Non-Routine, Non-Radiological Environmental Repert No. 50-313/75-9 2.
Report Date:
2/14/75 3.
Occurrence Date:
2/10/75 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas S.
Identification of Occurrence:
Fish impinged on intake screens exceeding 3000 pounds based on 16-hour sample period.
6.
Conditions Prior to Occurrence:,
Steady-State Power X
Reactor Power 2520 MWth Hot Standby Net.0utput 839 MWe Cold ~ Shutdown Percent of Full Power 99 Refueling Shutdown Routine Startup Operation
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Routine Shutdown U
Operation Load Changes During Routine Power Operation "
Other (Specify)
Four circulating water pumps were in operation.
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Description of Occurrence:
s During routine fish impingement monitoring 2/10/75, using procedure 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens,10,085 pounds of fish were collected during two 8-h'our sample periods. Fish impinged on the intake screens between 8:00 a.m. and'4:00 p.m. 2/9/75 totaled
~z 8085 pounds and fish impinged on the intake screens between 12:00 a.m.
and 8:00 a.m. 2/10/75 totaled 2000 pounds. The projected fish kill for the 24-hour period beginning at 8:00 a.m. 2/9/75 and ending at 8:00 a.m.
2/10/75 was 15,128 pounds based on an hourly average of the two 8-hour sampics. A mixture of gizzard and threadfin shad made up 99.9% of the total weight of fish. Other fish made up 0.1% of the total weight.
Threadfin shad made up 95% of.the total number of shad. Temperatures taken at 8:00 a.m. 2/10/75 were:
intake water temperature - 43*F, and ambient air temperature - 22*F.
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'U 400416 July 5, 1974 NSP-10, Rev. O Page 1 of 3
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-9 8.
Designation of Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Installation /
Environmental Construction Component Failure Operator Other (Specify)
X The app'. rent cause was due to a natural die off of threadfin shad during the winter. season,.
9.
Analysis of Occurrence:
O
'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 op'eration. The fish that were not collected were disposed of through the trash di'sposal system.
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- 10. Correctivo Action:
Long term studies are in progress to determine the effects of plant oFeration of the aquatic ecosystems of the Dardanelle Reservoir.
Data from this report and other data obtained is fed back into these studies to determine whatchanges might be made to the studies in order to ensure that adequate data is obtained for evaluating plant impact.
Review by Arkansas Power 6 Light Company and its consultants of the e
results of these studies will determine what corrective action might be taken to reduce plant effects on the Reservoir.
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July 5, 1974 NSP-l'D, R~ev. O Page 2 of 3 P
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Ns Non-Routine, Non-Radiological Environmental Report No. 50-313/75-9 11.
Failure Data:
The circumstances. of.this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No.
through 50-313/75-8.
50-313/75-1 12.
Reviews and Approvals:
Revicued and Approved by: Plant Safety Committee Yes (X)
No ( )
Plant Superintendent Yes GC)
No ( )
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Reference:
JNA-866 Date: 2/13/75
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Reviewed by:
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/ Licensing Supervisor V, W "
Cate:
f Approved by: d M9' ('/
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Date: N-*/Y-)J f,
Safety Review Committee.
Approved by:_/
Dato.
'7d -
' nager of Nuc car Services
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Approved by:g M fd? Z b d e 5 7
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Date:
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Director of Power Product. ion j
Approved by:
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//u cf Date:
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Senior'Vic'e/ ref dent '
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July 5, 1974 i
NSP-10, Rev. 0' Page 3 of 3 l
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