ML19319E527
| ML19319E527 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/31/1975 |
| From: | Phillips J, Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E522 | List: |
| References | |
| NUDOCS 8004110794 | |
| Download: ML19319E527 (4) | |
Text
.
1.
Non-Routine, Non-Radiological Environmental Report No. 50-313/75-6 2.
Report Date:
.1/30/75 3.
Occurrence Date:
1/25/75 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 2544 MWth Hot Standby Net. Output 840 MWe Cold Shutdown Percent of Full Power 99 %
Refueling Shutdown Routine Startup Operation
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Routine Shutdown
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Operation Load Changes During Routine Power Operation v
Other (Specify)
X Four circulating water pumps were in operation.
7.
Deceription of Occurrence:
During routine ' fish impingement monitoring 1/25/75, using procedure 1607.10, Monitoring Fish Impinged on. ANO-1 Intake Screens, 3331 pounds of fish were collected during a 24-hour sample period beginning,at 8:00 a.m.1/24/75, and ending at 8:00 a.m. 1/25/75. A mixture of gizzard and threadfin shad made up 99.5% of the total weight of fish. Other fish made up 0.5% of the total weight. Threadfin shad made up 96%.of the total number of shad.
Intake water temperature at 8:00 a.m. 1/25/75 was 42*F and ambient air temperature was 41*F.
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-6 8.
Designation of Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Installation /
Environmental Construction Component Failure Operator Other (Specify)
X The apparent causewas due to a natural die off of threcdfin shad during the winter season.
9.
Analysis of Occurrence:
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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:
Long term studies are in progress to determine the effects of plant operation on the a.luatic ecosystems of the Dardanelle Rescrvoir. 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 6 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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July 5, 1974 NSP-ID, Rbv. O Page 2 of 3
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-Non-Routine, Non-Radiological Environmental Report No.
50-313/75-6
- 11.. Failure 1. g :
The circut. stances of this report are similar to those
- .7orted in Non-Routine, Non-Radiological Environmental Reports No.
50-313/74-1 through 50-313/74-11 and 50-313/75-1 through 50-313/75-5.
12.
Reviews and Approvals:
Reviewed and Approved by: Plant Safety Committee Yes (X)
No ( )
Plant Superintendent Yes (X )
No ( )
Reference:
JWA-823 Date: 1/29/75 Reviewed by:
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Licensing Su'per' visor
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Approved by:
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"Sa ty R'ene'w Committee
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Date:
Approved by:
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Date: /
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em ger of Nuclear Services Approved by:
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Date: / - 8 [ 2 d
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'irector of ower Production D
Approved by:
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Senior Vice"Vresident O
v July 5, 1974 NSP-10, Rev. 0 Page 3 of~3
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U-l1inmyam to N. C. Hoseley from Arkansas Power and Light Cogeny' dated L.-
Jcnuary'25, 1975.
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