ML20086R126

Ro:On 750128,newly Installed Fish Screens at Intakes Allowed Average of 89% of Fish Impinged During Period to Return to River Alive.Incident Not Considered to Have Caused Significant Mortality.Fish Mortality Data Encl

ML20086R126
Person / Time
Site:	Surry
Issue date:	02/03/1975
From:	Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Dicker G US ATOMIC ENERGY COMMISSION (AEC)
References
417, NUDOCS 8402280694
Download: ML20086R126 (3)

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y teh / JM VIRGINt A ELECTRIC AND POWER COMPANY, RICHMOND, VIRGINI A 23261

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99gy Mr. Gordon K. Dicknr, Chief Serial No. 417 Environmental Projects - Branch 2 Env Ops /JCW:cjd Division of Reactor Licensing Docket Hos. 50-280 Office of Nucleer Regulation 50-281 U. S. Nuclear reguletory Commission License Nos. DPR-32 Washington, D. C. 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 tir. t'au l Leecn OT' your statt by tir. Jor<n Waite or Vepco on January i9, 19/>.

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, 39%

of the impinged fish survived (59,328 alive, 7,632 dead). Data for the day preceeding and 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 tributarias 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 surv! val and widespread dispersal of this species in the tidal James. Cold winters resulting,in low water tempera-

- tures normally serve as a population " check" for this species.

The incident is not considered to have caused a significant 7. .

mortality because of the relatively large numbers _of fisit involved ~In

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• swter wo. 2 VIRGINIA totCTRIC AND POWER COMPANY TO Nr. Gordon K. Dicker conjunction with the high survival shown by the data. In addition, the relatively high survival (89%) is well within the range of performance experienced to date in the operation of the new screens; and the survival of D. pctenense (89%) is within the range experienced for this species.

Very truly yours C. M. tal ings ice Presiden - Power Supply and 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 Reglon iI i

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Modal Size Modal Size Modal Size Alive, Dead (MM TL1_ Alive Deed (MM TL) Alive Dead (MM TL)

Dorosoma pctenense 159 5 75 80 174.0 21 5 80 71.5 35 70 Menidia menidia 4.5 05 i00 10.0 1.0 100 1.0 1.0 100 -

Menidia beryllina - -

, 05 0 50 Dorosoma cepedianum 1.0 0 140 L.0 05 180 35 0 130

_Alosa aestivalis 4.0 0 80 90 1.0 80 90 15 80 h Brevoortia tyrannus 2.0 0 90 30 0.5 90 2.5 0 90 Anchoa mitchelli 1.0 0 50 2.5 0 60 1.0 0 60 Micropogon,undulatus_ 1.5 0 60 1.~ 5 1.5 50 05 0 70 Anguilla rostrata 05 0 500 05 0 250 1.0- 0 400 Morone americana 35 0 110 1.0 0 120 1.5 0 100 Aloca pseudoharengus - - -

0 0.5 90 - - -

Aloca sapidissima 15 0 120 - - -

Average #/5 min. rep. 179 8 206 26 5 91.5 6  !

Projected #/ Day 51,552 2,304 5:1,328 7,632 26,352 1,728 Ave. Wt./ Dead Fish 4.8 gm. 5 2 gm 2 9 gm g Projected Wt. of Dead / Day 24.4 lbs. 87 5 lbs. 11.1 lbs.  !

1. Screens 6 6 5

1. Pumps 6 6 5 d

% Survival 96 89. ,. 94 SURRY POWER STATICN - FISH SCREEN SAMPLES NOTE: umbers repr esent *the average number of fish fo: a given species per 5 minute sample replicate.

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