ML19093B336

Confirms a Report of a Fish Impingement Incident Which Occurred on 01/28/1975 Reported to Paul Leech of Staff by John White of VEPCO on 01/19/1975

ML19093B336
Person / Time
Site:	Surry
Issue date:	02/03/1975
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Dicker G Office of Nuclear Reactor Regulation
References
Download: ML19093B336 (3)

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• Vepco Mr. Gordon K. Dicker~ Chief Seri a 1 No. 417 Environmental Projects.- Branch 2 Env Ops/JCW:cjd Division of Reactor Licensing Docket Nos. 50~280 Office of Nuclear Regulation 50-281 U. S. Nuclear Regufatory Commission License Nos. DPR-32 Washington, D. t. 20555 DPR-37

Dear Mr. Dicker:

This will confirm a report of a fish impingement incident which occurred at the Surry Power Station on January 28, *1975, as reported to Mr. Paul Leech of your staff by Mr. John White of Vepco on January 19, 1975, The newly installed fish screens at the intakes allowed an overall average of about 89% of the fish impinged during the period to return to the river alive. The attached summary data sheet shows that, on January 28, 89%

of the impinged fish survived (59,328 alive, 7,632 dead). Data for the day preceeding ~nd the day after are also presented.

This incident is not considered abnormal because threadfin shad (Dorosoma* petenense), the major species in the sample, has shown a major increase in numbers in the James River over the past three years. An introduced species, D. petenense was formerly limited in population numbers and largely confined to the major tributaries and ox-bows of the James well. upriver from Surry. Unusually mild winters over the past three years and the possible flushing effects of Hurricane Agnes have resulted in an abnormally high survival and widespread dispersal of this species in the ti da 1 James.* Co 1d winters resulting in low water tempera-tures normally serve as a population 11 check 11 for this species.

The incident is not considered to have caused a significant mortality because of the relatively large numbers of fish i~volved in

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~-**VIRGINIA ELECTRIC AND POWER COMPANY TO Mr. Gordon K. Dicker SHEET NO. 2 conjunction with the high survival shown by the data. In addition, the relatively high surviv.al * (89%) is wel 1 within the range of performance experienced *to date in the operation of the new screens; and the survival

. of Q.:._ petenense (89%) is within the ra_nge experienced for this species.

Very truly yours

~~/

£-. C* M. ta 1 in gs

• Presiden - Power Supply

/'~i~~d Production Operation

Attachment:

A - Fish Mortality.data.*for fish-*

loss incident at Surry Power Station-on January 28, 1975 cc: Mr. Norman C. Moseley, Director R_egion 11

- . --*--*--------~ *----~--------------~--...... -** -***** ... ---~* --* .......... --*** - .. .

ATTACHMENT A 1-27-75 1-28-75 1-29-75 Modal Size Modal Size Modal Si.,

Alive Dead (MM TL) A1 ive Dead (MM TL) Alive Dead (MM TL) *1 Dorosoma petenense 159,5 7,5 80 174,0 21.5 80 71.5 3,5 70

. Men id i a menidia 4,5 0.5 100 10.0 1.0 100 1.0 1.0 100 Menidia beryllina 0.5 0 50 Doro'soma cepedianum 1. 0 0 140 4.o 0.5 180 3,5 0 130 Alosa *aestival is 4.0 0 80 9.0 1.0 80 9.0 1* 5 80 Brevoortia tyrannus 2.0 0 90 3.0 0.5 90 2.5 0 90 Anchoa mitchelli Micropogon undulatus

l. 0

1. 5 0

0 50 60 2.5 1.*5 0 60 so*

1.0 0 60 e 1.5 0.5 .0 70 Anguilla rostrata 0.5 0 500 0.5 0 250 1.0. 0 400 Marone americana 3,5 0 110 1. 0 0 120 1.5 O* 100 Alosa pseudoharen9us 0 0.5 90 Alosa sapidissima l. 5 0 120 Average #/5 min. rep. 179 8 206 26.5 91.5 6 Projected #/Day 51,552 2,304 59,328 7,632 26,352 1,728 Ave. Wt./Dead Fish 4.8 gm.

• I 5.2 gm 2.9 gm Projected Wt. of Dead/Day 24.4 lbs. 87.5 lbs. 11. 1 lbs.

1. ~.creens

,. 6 6 5 e

1. ~umps 6 6 5

% ~lurv i va 1 96 89 94 SURRY POWER STATION - FISH SCREEN SAMPLES NOTE: Numbers represent the average number of fish for a given species per 5 minute sample replicate.

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