ML19320A125
| ML19320A125 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 11/26/1974 |
| From: | Cavanaugh W, Phillips J, Reuter D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A119 | List: |
| References | |
| NUDOCS 8004140724 | |
| Download: ML19320A125 (3) | |
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Non-Routine, Non-Radiological Environmental Report No. 50-313/~
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Report Dste: 11/26/74 3.
Occurrence Date:
11/18/7 4.
Iscility: Arkansas Nuclear One - Unit 1 Russellville, Arkansas S.
Identification of Occurrence:
a Fish killed on intake screens exceeding 3000 lbs. based on 24-1 6.
Conditions Prio'r to Occurrence:
Steady-State Power Reactor Power 0-639 Hot Standby Net Output 0-200 Cold Shutdown Percept of Full Power j Refueling Shutdown Routiae Startup X
Operation Routine Shutdown g
N Operation 1.oad Changes During Routine Power Operation Other (Specify)
All four circulating water pumps were in o 7.
Description of Occurrence:
During routine fish impingement monicoring 11/18/74 using proc I.
1607.10, Monitoring Fish Impinged on ANO Intake Screens, 3054 fish were collected during a 24-hour period. This 24-hour per was from 9:40 a.m.11/17/74 to 9:45 a.m.11/18/74. A mixture threadfin and rizzard shad made up 98.8% of the total weight o i
fish. Other type fish made up the remaining 1.2%.
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i Mon-Routine, Non-Radiological Environmental Report No. 50-313/74-2 Sr 8.
Designation of Apparent Cause of Occurrence:
o Design Procedure Manufacture Unu w t Service Condition Including j
Installation /
Environmental l
Construction Component Failure Operator Other (Specify)
The apparent cause was due to a 20F decreasg j
temperature. The primary cause of this dect l
was a 1.5 inch rain. The decrease in tempe2 i
resulted in a weakening of the shad. His :
i them to become vulnerabli! to impingement by I
current.
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Analysis of Occurrence:
The only noticeable environmental impact was the removal of the mentioned fish from the lake.
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Corrective Action:
1 Corrective action was taken in accordance with procedure 1607.1(
l This included continuous monitoring for another 24-hour period.
findings of this 24-hour period was that only 2330 lbs. 13 o::. i fish were impinged.
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~l Non-Routine, Non-Radiological Environmental Report No. 50-313/74-2
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Failure Data:
o The circumstances of this report are similar to those reported i Non-Routine, Non-Radiological Environmental Report No. 50-313/74 d
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Reviews and Approvals:
i Reviewed and Approved by:
Plant Safety Committee Yes (X)
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Plant Superintendent Yes (X)
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Reference:
JWA-687 Date: 11/25 Date:
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Reviewed by:
Licensing Supervisor
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Approved by:_ /,
~ fet / evie%itmittee j
Approved by-Date:
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Manager of N6 clear Servi s Approved by: l}wg M[ A Mk[@ ate: //A %
/ Director of Powef Production e
Date: //
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Approved by:
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b Senior Vice President i
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