ML19320A061

Nonroutine Nonradiological RO 50-313/74-03:on 741121,fish Impingement on Intake Screens Totaled 4,182 Lbs.Caused by Seasonal Unstable Water Temp.Monitoring Continued for 24-h

ML19320A061
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/22/1974
From:	Phillips J, Reuter D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19320A056	List: ML19320A055 ML19320A061 ML19320A070
References
NUDOCS 8004140677
Download: ML19320A061 (3)

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i 50-313/74-3

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1. Non-Routine, Non-Radiological Report No.

Report Date: 11-22-74 3. Occurrence Date: 11-21-74

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4. Facility: Arkansas Nuclear One - Unit 1

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5. Identification of Occurrence: .

Fish kill on Intake Screens exceeding 3000 lbs. based on 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> samp

' 6. Conditions Prior to Occurrence:

Reactor Power 1926 MWtfr Steady-State Power X

f' Net.0utput 650 MWe Hot Standby Cold Shutdown Percent of Full Power 75 %

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Refueling Shutdown Routine Startup h

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Operation

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Routine Shutdown ,

Operation ,

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Load Changes During Routine Power Operation '.

Other (Specify) All four circu ating water pumps were in operati

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I 7. Description of Occurrence:

11-21-74 using procedure During routine fish impingement monitoring

• Monitoring Fish Impinged on. ANO Intake Screens, 4182 lbs, of fish w collected during a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period. This 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period began 9:00.:

November 20, and ended 10:30 a.m. November 21, 1974. A mixtureOthe- of4 and ihreadfin Shad made up 99.9% of the total weight of fish.

Threadfin Shad made up 97% o made up only .1% of the total weight.

total weight of Shad. .

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8004140[77 -

p NSP-10, Rev. O Page 1 of July S, 1974

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Non-Routine, Non-Radiological Report No. 50-313/74-3 f j

, 8. Designation of Apparent Cause of Occurrence:

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I Design Procedure

- Manufacture Unusual Service l

Condition Including l Environmental

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Installation /

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Component Failure Operator 4

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Other (Specify) The apparent cause was due to th'e unstable wal J

temperature in Lake Dardanelle during the firs f weather of the winter seasog.

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9. Analysis of Occurrence:

/  ! We only noticeable Environmental Impact was the removal of the

! mentioned fish from the lake, These fish were disposed of thrc land fill operation, none were dumped into the discharge embayr l

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10. Cy rective Action:

Corrective action was taken in accordance with procedure 1607 Ris included continuous monitoring for another 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> peri 6 The findings of this were that only 2251 lbs. of fish were int.

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July 5, 1974 NSP -ID, Rev. O Page

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j Non-Routine, Non-Radiological Report No. 50-313/74-3 Sheet

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'Ihe circumstances of this report are similar to those reported in

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Non-Routine, Non-Radiological Environmental Reports No. 50-313/74-1

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12. Reviews and Approvals:

Reviewed and Approved by: Plant Safety Committee Yes (x) No Plant Superintendent Yes (x) No (p) .

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(/ Referenec: JWA-695 Date: 11/26/.~

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Licensing Supervisor Approved by: [ f /f[L } & k9n, G f Date: lh & ~~l l ./ afety R'ev'ic' omm'ttee I '

. Approved by: d.' L W Date: /2- '

I agerofNcErServices[

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Approved by: /k{s// / ;[,J.,.(r, f Dato: /2 P

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Director of Power Pyoduction Approved by:

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Senior Vice Prc$ident

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July 5, 1974 NSP-10, Rev. O Page 3 of-

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