ML20085M381
| ML20085M381 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 12/28/1973 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20085M372 | List: |
| References | |
| AO-BF-EAO-7380, AO-BF-EAO-7381W, NUDOCS 8311080422 | |
| Download: ML20085M381 (2) | |
Text
_
O TENNESSEE VALLEY THOFilTY C-2 CHATTANOOGA, NESSEE i
ri e
37401 December 28, 1973
@ryjggg,g PA ATNE AS Hip Mr. Norman C. Moseley, Director Region II Regulatory Operations Office U.S. Atomic Energy Commission 230 Peachtree Street, NW.
Atlanta, Georgia 30303
Dear Mr. Moseley:
Subject:
TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 1 - DOCKET No. 50-259 - FACILITY OPERATING LICENSE DPR ENVIRONMENTAL ABNORMAL OCCURRENCE REPORT BF EAO-7381W AND 7384W The purpose of this report is to provide written notice of fish killed when impinged on the Browns Ferry Nuclear Plant unit 1 intake screens.
This report is required by section 4.1.2(f) of our environmental technical specifications.
These incidents were reported to the Region II Regulatory Operations Office by telephone or telegram within a short time after each occurrence. Each of these incidents occurred while washing the circulating water pump traveling screens at the pumping station and was similar to the occurrences which were reported for BF EAO-732W-7380W. The tabulation below gives the date of each occurrence and the esticates ;f the fish impinged.
Fish Impingement Estimates Other Item Date Shad Species Total BF EAO-7381 December 19 1,228 128 1,356 BF EAO-7382 December 21 105,500 390 105,890 BF EAO-7382 December 22 3,312 124 3.436 BF EAO-7382 December 23 4,492 172 4,664 BF EAO-7382 December 25
~ 10,224 120 10,344 8,094 1,278 9.372 BF EAO-7383 December 26 BF EAO-7384 December 27 12,196 232 12,428
/,
_/
P]
(;
\\
/
kI 8311080422 731229 PDR ADOCK 05000259 i
1 J S
o PDR ls,i b
(L
_ SL________ _._ _ _ _ _ _.
~
o o
- Mr. Norman C. Moseley December 28, 1973 The number of shad impinged on December 21 was the largest daily number experienced since operation of the intake began. The cause s
of this increased number is not known, however, it is our belief that the greater number of shad impinged was related to a sudden drop in ambient air temperatures and a resultant drop in water temperature which may have affected the fish prior to their impinge-ment on the intake screens. Previous species counts made during studies at Browns Ferry indicated that most shad caught on the intake screens were threadfin shad, a specie which is known to be adversely affected by lov vater temperatures. Air temperatures for December 20 dropped rapidly from above 45 F. to below 20 F.
and remained lov through December 22.
The water temperature to a depth as great as 13 feet dropped approximately 5 F. on December 20 and reached a minimum of approximately 41 F. at 10 p.m. on December 20.
This reading was made in an overbank area approximately halfway between the reservoir shoreline and the navigation channel. It is expected that sha11over overbank areas vould have experienced an even greater temperature drop.
A correction to the number of impinged fish reported for BF EAO-7380 reported in our letter of December 20 is necessary. The number reported was for one screen washing and did not include results from a second vashing. The second washing estimate of impinged fish was 992 shad and 136 nonshad. This gave a total for the day of 3,192 shad and 296 nonshad.
A proposed change to the environmental technical specifications which would modify the specification and end the requirement for daily reports of fish impingement as well as provide for continuing reports on studies into this problem has been transmitted to the Directorate of Licensing.
Very truly yours,
( )
7
.)
G11,
u.
/p G
J. E. G111 eland 'g-Assistant to the Manager of Power CC: Mr. Gerald R. Hooper District Fisheries Supervisor Alabama Game and Fish Commission Dept. of Conservation and Natural Resources P.O. Box 366 Decatur, Alabama 35601 Mr. Sam L. Spencer, Chief Fisheries Section Mr. J. F. O' Leary, Director Alabama Game and Fish Commission Directorate of Licensing Dept. of Conservation and Natural Resources U.S. Atomic Energy Commission 624 North Union Street
. Washington, DC 20545 Montgomery, Alabama 36104 r
L
__ n__ 1 1 ----
~
~"