ML19320A368

Nonroutine Nonradiological Environ Rept 50-313/74-10:on 741217,fish Killed on Intake Screens Exceeded Tech Spec Limit for 8-h Sample Period.Caused by Natural Dying Off of Threadfin Shad During Winter Season

ML19320A368
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/30/1974
From:	Cavanaugh W, Phillips J, Rueter D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19320A364	List: ML19320A363 ML19320A368
References
50-313-74-10, NUDOCS 8005010868
Download: ML19320A368 (4)

Text

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50-313/74-10

1. NON-ROUTINE, NON-RADIOLOGICAL ENVIRONMENTAL REPORT NO.

12-30-74 3. Occurrence Date: 12-17-74

2. Report Date:

4. Facility: Arkansas Nuclear One-Unit 1 Russellville, Arkansas

. S. Identification of Occurrence: Fish kill on the intake screens exceeding 3000 lb. based on an 8 hour sample period. 6 .- Conditions Prior to Occurrence: FMth Reactor Power Steady-State Power _

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Net. Output MWe Ilot Standby Percer.t of Full Power _% Cold Shutdown

                            ' Refueling Shutdown Routine Startup Operation
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Routine Shutdown , Operation ~' 80,-100 Load Changes During Routine Power Operation Other (Specify)- 4 circulating water pumps were in operation. Water temperature, as measured at the inlet to the condenser wa,ter box, was 44F and the anbient air temperafure was 32F at 8:00 a.m. '

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7. Description of Occurrence:

12-17-74 using procedure 1607.10, During routine fish-impingevent monitoring

• Monitoring Fish Impinged on'ANO-1 Intake Screens, 6129 lb. of fish weTe collected during an 8 hour sample period. The projected fish kill for the and ending at 8:00,a.m.

24 hour period beginning at 8:00 am 12-17-74

                                  -   12-18-74 was 18,387 lb. based on the 8 hour sampic. A mixture          of Gizard Other fish made up and Threadfin Shad made up 99.9% of the total weight.Threadfin Shad mad
                                      .1% of the total weight of fish.

number of Shad.

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NSP-10, Rev. O Page 1 of 3 July _5, 1974

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         -            s AL REPORT NO, 50-313/74-10
                       -NON-ROUTINE, NON-RADIOLOGICAL ENVIRONMENT

8. - Designation of Apparent Cause of Occurrence:

Procedure Design _

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Unusual Service

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- Nbnufacture. Condition Including Environmental Installation / Construction Component Failure Operator - Other (Specify) The apparent cause was due to a natural die off of Threadfin Shad during the winter season.

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9. Analysis of Occurrence: b h

The only noticeable Environmental Impact was the removal of t e

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The fish that were collected were mentioned fish from the lake. The fish tnat were not disposed of through land fill operation. collected were disp

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Corrective Action:

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                           ~10.                                                                                    l t Long term studies are in progress to determine the effects                  i      Data of p
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• operation on the aquatic ecosystems'of the Dardanelle Reservo from this report and other data obtained is i fed back.into in order to ensurethes to determine what changes might be made to the stud es Review by impact. l that adequate data 'is obtained for evaluating plantf these studies will determine

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ffects on the

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                     ,              . APT,L and its consultants of the results owhat corrective                                         1

reservoir.

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Page 2 of 3

                                                                -NSP-10, Rev. O July S, 1974_

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NON-ROUTINE, NON-RADIOLOGICAL ENVIRONMENTAL REPORT NO. 50-313/74-10

11. Failure Data:

The circumstances of this report are similar to those reported in

 .                                          Non-Routi.nc, Non-Radiological Environmental Report Nos. 50-313/74-1 through 50-313/74-9.
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12. Reviews and Approvals:

Reviewed and Approved by: Plant Safety Committee Yes (X ) No ( ) Plant Superintendent Yes (X ) No ( ) t

Reference:

JWA-755 Date: 12/26/74

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                                        . Reviewed by:                       ',                  Date:  /2!TO/ 79
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Licerising Supervisor Approved by* l - ]QY/ yy Cs/ ( Date: /)2 -U ~ l V

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Safet[ReviewCommittee'

                  .                      Approved by:1,       M,_ C_ _ _ _// ,/        _

Date: / 2 /Jo/7d__

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                                                        ' ) nager of Nuclear SeYv'ic [ A Approved by M///'gg // .,4,/                            Date:            -Y
                                                    /        Director 'of' Power Production
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                                         , Approved by:
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Date: / ' '. /

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Senior Vice President  ;

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

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AEC DISTRIBUT!C': FOR PART SO DOCKET t.1ATERI AL (TET.iPOR ARY FORi.1)

                 ',                                                                                            CONTROL NO:                      12
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ENVIRO

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FILE: F ROM: Arkansas Power & Light Co. DATE OF COC DATE REC'D LTR TWX RPT OTHER Little, Rock, Ark J.D. Phillips 12-30-74 1-3-75 xxxx ORIG CC OTHER SENT AEC PDR xxxxxx TO:

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Mr. E.G. Case 1-signed 39 SENT LOCAL PDR CLASS UT! CLASS PROPINFO INPUT NO CYS REC'D DOCKET NO: . xxxxxxx W 50-313 _ DESCRIPTION: ENCLOSURES: Ltr trans the Following: Non-goutine Environmental Report #74-10 on 12-17-74 concerning fish kill on the intake

              ,     ._.. , " T '-'~~  W                                   s reens exceeding 3000 lb. based on an 8hr ji C.:._2       s , , . n 1)U L u
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