ML19309D930
| ML19309D930 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/21/1975 |
| From: | Cavanaugh W, Phillips J, Rueter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19309D923 | List: |
| References | |
| NUDOCS 8004110752 | |
| Download: ML19309D930 (3) | |
Text
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-4 2.
Report Date:
1/21/75 3.
Occurrence Date:
1/18/75 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arka'nsas 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
=esoo Wth Hot Standby Net. Output 830 We Cold Shutdown Percent of Full Power 98 %
Refueling Shutdown Routine Startup Operation V
Rcutine Shutdown Operation Load Changes During Routine Power Operation v
Other (Specify)
Four circulating water pumps were in operation.
7.
Description of Occurrence:
During routine fish impingement monitoring 1/18/75 using procedure 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, 9300 pounds of fish were collected during a 24-hour sample period beginning at 8:00 a.m. 1/17/75 and ending at 8:00 a.m. 1/18/75. 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 99% of the total number of shad.
Intake water temperature at 8:00 a.m.
1/18/75 was 43*F.
The ambient air temperature was 39*F.
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July 5, 1974 NSP-10, Rev. O Page 1 of 3
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Non-Routine, hon-Radiological Environmental Report No. 50-313/75-4 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 cause was due to a natural die off of threadfin shad during the winter season,.
s 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.
- 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 i
ensure. that adequate data is obtained for evaluating plant impact.
Review by Arkansas Power f Light Company and its consultants of the
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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-lb, Rev. O Page 2 of 3
V' Non-Routine, Non-Radiological Environmental Report No. 50-313/75-4 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 50-313/74-11 and 50-313/75-1 through 50-313/75-3.
1 12.
Reviews and Approvals:
Reviewed and Approved by: Plant Safety Comnittec Yes (X) 33 ()
Plant Superintendent Yes (X)
No ( )
Reference:
JWA-803 bate: 1/20/75 Revicued by:
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J' Licensing'Sup'ervisor Approved by:,
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ety eview ommittee Approved by: /[
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E nager of d ieor Ser8 des
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D'irector of Power Production
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Approved by:
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Date:
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'b Senior Vice Pr6sident
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July 5, 1974 1:SP-10, Pcv. O Page 3 of 3 l
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