ML19319E429
| ML19319E429 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/20/1975 |
| From: | Phillips J, Woodward J ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E373 | List: |
| References | |
| NUDOCS 8004100707 | |
| Download: ML19319E429 (3) | |
Text
+ 15 lb\\1 o
(V)
' @4 '
1.
Non-Routine, Non-Radiological Environmental Report No. 50-313/75-13 2.
Report Date:
2/20/75 3.
Occurrence Date:
2/14/75 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Fish kill on intake screens exceeding 3000 pounds based on two 8-hour sample periods.
6.
Conditions Prior to Occurrence:
Steady-State Power Reactor Power 2525 MWth Hot Standby Net. Output 839 MWe Cold Shutdown Percent of Full Power 99 Refueling Shutdown Routine Startup Operation Routine Shutdown Operation Load Changes During Routine Power Operatihn Other (Specify)
Four circulating water pumps were in operation.
5 7.
-Description of Occurrence:
i During routine fish impingement monitoring 2/14/75, using procedure 1607.10, Monitoring Fish Impinged on ANO-1 Intake Screens, 4170 pounds of fish were collected during two 8-hour sample periods. The fish impinged on the intake screens between 8:00 a.m. and 4:00 p.m. 2/13/75
~;
totaled 3370 pounds. Fish impinged on the intake screens betwden 12:00 a.m. and 8:00 a.m. 2/14/75 totaled 800 pounds. The projected fish impinge-ment for the 24-hour period beginning at 8:00 a.m. 2/13/75 and ending at 8:00 a.m. 2/14/75 was 6255 pounds based on the hourly average of the two 3-hour samples. 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 94% of the total number of shad.
Temperatures taken at 8:00 a.m. 2/14/75 were: intake water temperature -
44.1*F and ambient air temperature - 38'F.
8004100 7 0 '?
ON)
July 5, 1974 NSP-10, Rev. O Page 1 of 3
s-x E
O)
\\v Non-Routine, Non-Radiological Environmental Report No. 50-313/75-13 8.
Designation of Apparcat 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.
9.
Analysis of Occurrence:
(
The only noticeab.le environmental impact was the removal of the above N
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.
5 i
- 10. Corrective Action:
Long term studies are in progress to determine the effects of plant 1
op'eration 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 S Light Company and its consultants of the results of these studies will determine what corrective action might be taken tc,yecoce plant effects on the Reservoir.
h
\\.J July 5, 1974 NSP-fD., Rev. O Page 2 of 3 oQ
p
.~
II
)
L/
Non-Routine, Non-Radiological Environmental Report No. 50-313/75-13 11.
Failure Data:
The circumstances of this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No. 50-313/75-1 through 50-313/75-12.
12.
Reviews and Approvals:
Reviewed and Approved by:
Plant Safety Comittee Yes (X)
No ( )
Plant Superintendent Yes (X)
No ( )
Reference:
JWA-874 Date: 2/19/75 s.
Reviewed by:
A2
[
Date:
7[
Licensing Supervisor
/
Approved by hf)1//A,s/ nu..,4,sf S sN ~?[
Date: S
/ " ifei;[Revie ' CodimittUe i
~
Approved by:
c.A 12 #
Date: 7-Jo I I!anager of kiicicar Services Approved by:
)*gg/A
/...
f.
Date:i.N N 8'~2 Y "
'~
/ uirector of Pow'e$ ' Production Approved by:
h / l.
/'
['
Date: 3 I.8 7k
,j Senior hice Pre'sident O)
\\N./
July S, l'974 MSP-10, Rev. O Page 3 of 3 i
.,e
., _.