ML19319E402

Nonroutine,Nonradiological Environ Rept 50-313/75-19:on 750220,during Routine Fish Impingement Monitoring,Fish Kill on Intake Screens Exceeded 3,000 Lb for 24-h Period.Caused by Natural Die Off of Threadfin Shad During Winter

ML19319E402
Person / Time
Site:	Arkansas Nuclear
Issue date:	02/24/1975
From:	Phillips J, Woodward J ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19319E382	List: ML19319E381 ML19319E400 ML19319E402
References
NUDOCS 8004100688
Download: ML19319E402 (3)

Text

.... .

7 i

(S

1. Non-Routine, Non Radiological Environmental Report No.. 50-313/75-19

2. Report Date: 2/24/75 3. Occurrence Date: 2/20/75 .

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 Occurrenec:

Steady-State Power X Reactor Power 2543 MWth __

llot Standby Net. Output 839 MNe Cold Shutdown Percent of Full Power 99  %

Refueling Shutdown Routine Startup '

Operation Routi~ne Shutdown Os Operation ..

Load Changes During Routine Power Operation Other (Specify) Four circulating water pumps were in operation. i 5

7. Description of Occurrence:

i' During routine fish impingement monitoring 2/20/75, using procedure 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, 4100 pounds of fish were collected during a 24-hour sample period beginning at 8:00 a.m. 2/19/75 and ending at 8:00 a.m. 2/20/75. 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. 2/20/75 was 44.6*F and ambient '

air temperature was 27*F.

I J

^

soo41eo fgg .

July 5, 1974 NSP-10, Rev. O Page 1 of 3 .

~ , . - - - - , - -

v

m f%

\

' v' Non-Routine, Non-Radiological Environmental Report No. 50-313/75-19

8. Designation of Apparent Cause of Occurrence:

Design Proc'e dure  ;

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.

1

9. Analysis of Occurrence:

g'"'s The only noticeable environmental impact was the removal of the above

(

v

) mentioned fish from the' lake. The fish that were collected were dis- '

posed of through land fill operation.

5l i

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 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. -

F

\

\

July 5, 1974 NSP-l'd, Rev. O Page 2 of 3 T '

m -

,, .+

l .

7 Non-Routine, Non-Radi slogical Environmental Report No. 50-313/75 19

11. F:11uro Data:

The circumstances of this report are similar to those reported in Non-

Routine, Non-Radiological Environmental Reports No. 50-313/75-1 through 50-313/75-18.

4

12. _Roviews and Approvals:

l Reviewed and Approved by: Plant Safety Committoc

• Yes (X ) No ( )

Plant Superintendent Yes (X ) - No ( )

O Referenec: JNA-878 Date: 2/21/75 Reviewed by:__ e_

' Date: ,f '

Licensing Supervisor ' '

l~ Approved by: h//wdf[. 4/lrd.+/l 2 /Jnn, _ Dato: >/> V/7 )

/ afety Review Commit'tec '

i~

Approved by: i Qbnager o'f Nuc1 car Jervices Date: A/4[7[

Approved by: c,,df/ /bld, ) i/t.,,, Dato: p/> y/' 73 (irector of Power Produ/ction Approved by: O h ,/ ,,'. Datc: 2

/

~

5 2(

• Senior Vico P"c[ident r '

~

F O

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

_ . ____ ._- _ _ . _ _ _ _ _.