ML19309D987
| ML19309D987 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/18/1974 |
| From: | Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19309D984 | List: |
| References | |
| NUDOCS 8004110769 | |
| Download: ML19309D987 (3) | |
Text
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Non-Routine,Non-RadiologicalEnvironmentalReportNo.50h13/74-9 2.
Report Date:
12/18/74 3.
Occurrence Date:
12/12/74 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Fish kill on the intake screens exceeds 3000 pounds based on an 8-hour sample period.
6.
Conditions Prior to Occurrence:
Steady-State Power Reactor Power o
bMth i
i Hot Standby Net. Output o.
bMe Cold Shutdown Percent of Full Power o Refueling Shutdown Routine Startup Operation g
Routine Shutdown X
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Operation
~l Load Changes During Routine Power Operation Other (Specify)
X Four circulating water pumps were in operation.
Water temperature, as measured at the inlet to the condenser water box, was 45*F-and the ambient air temperature was 39"F at 8:00 a.m.
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7.
Description of Occurrence:
1 During routine fish impingement monitoring 12/12/74 using procedure
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1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, 2777 pounds of fish were collected during an 8-hour sample period.
The projected fish kil1 for the 24-hour period beginning at 8:00 a.m.
12/12/74 and ending at 8:00 a.m. 12/13/74 was 8331 pounds based on the 8-hour sample, A mixture of gi::ard and chreadfin shad made up 99.7S. of the total i
weight. Threadfin shad mr.de up 98.6's of the total number of shad.
1 800413o X f i
..i July I, 1974 l
NSP-10, Rev. O Page 1 of 3 le
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Non-Routine, Non-Radiological Environmental Report No. 50-313/74-9 8.
Designation of Apparent Cause of Occurre ice:
Design Procedure Manufacture Unusual Service Condition Including Installation /
Environmental Construction' Component Failure Operator Other (Specify) x The apparent cause was due to a natural dying off of threadfin shad during the winter season.
9.
Analysis of Occurrence:
\\s 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. The fish that were not collected were disposed of through the trash disposal system.
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- 10. Corrective Action:
l 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 impact.
Review by APSL and its consultants 6f the results of these studier, will i
determine what corrective action might be taken to reduce plant effects on the Reservoir, i
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!v) i Juif 5, 1974 NSP-1D, Rev. O Page 2 of 3
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Non-koptine, Non-Radiological Environmental Report No. 50-313/74-9 11.
Failure Data:
The circumstances of this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No. 50-313/74-1 through 50-313/74-8.
j li'. Reviews and Approvals:
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Reviewed and Approved by: Plant Safety Committee Yes (X)
No ( )
Plant Superintendent Yes (X)
No,( )
Reference:
JWA-729 Date: 12/16/74
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Reviewed by:
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'/LicensingSupervisor _
cate:
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Approved by: // /',Y///-, /A.
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sDate: /7 -//?- U #
' afet..Rev'iets foinmittee Approved by:
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Manhgor of Nucicar Service:l]
Approved by: fe.b // & ' [ / /, j m- [ [
Date: /e'
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/ Director of Power Production
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Approved by:
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Date: /2
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i Senior Vice Pfesident l
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Jtity,i,1974 MSF-10, Rev. O Page 3 of 3
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