ML20249B480

PNO-76-128:on 760721,fish Impingement Rates on Order of Tens of Thousands Were Reported for Time Period 0300 to 0600 Hours.Licensee Gathering Data Re Total Numbers of Fish & Extent of Dissolved Oxygen Problem.State Informed

ML20249B480
Person / Time
Site:	Calvert Cliffs
Issue date:	07/23/1976
From:	Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-76-128, NUDOCS 9806230200
Download: ML20249B480 (1)

Text

-. _. _ _ - _ - _ _ _

! i, PRELIMINARY NOTIFICATION July 23, 1976 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-76-128 This preliminary tiotification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance. The information presented is as' initially received without verification or evaluation and is basically all that is known by IE staff on this date.

Facility: Calvert Cliffs-1 (DN 50-317)

Lusby, Md.

Subject:

UNUSUAL OCCURRENCE - FISH IMPINGEMENT Fish impingement rates on the order of tens of thousands /hr were reported for the time period 0300 to 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> on 7/21/76. Very low dissolved oxygen (D.O.) levels both inside and outside the forebay curtain walls appar-

' ently were a causitive factor. The fish were identified as predominately spc menhaden and croakers in that order. The licensee is gathering data with i

regard to total numbers of fish and the extent of the D.O. problem which

!. is apparently not plant related. Preliminary information indicates many fish were gathered in the shore areas along the Chesapeake Bay and were easily caught by shore seining. Many fish were not dead but appeared stressed. Current impingement rates were back to normal low.

Media interest is expected because of public hearings on-going at Waldorf, Md. relative to proposed Douglas Point facility. The Stace 1

of Maryland has been and is being kept informed. A press release is t not planned.

1 L ' ~ Region I, NRC, Philadelphia, Pa. received notification of this occurrence i by telephone from Chief Environ. Engineer, BG&E at 1500 hr.,.7/22/76.

Contact:

FADreher, IE x27261 GWRoy, IE x27261 DThompson, IE x27541

Distribution

ii Chairman Rowden Consnissioner Mason S. J. Chilk, SECY

$ Commissioner Gilinsky C. C. Kammerer, CA G. F. Murphy, JCAE l Commissioner Kennedy I. L.'V. Gossick, EDO E. Volgenau, OIE J. A. Harris, PA

.! B. C. Rusche, NRR H. K. Shapar, ELD T. J. McTiernan, AIA K. R. Chapman, NMSS R. G. Ryan, OSP l Transmitte'd: PBldg [_k ; H St h a ; NMBB I  ; . Luge 4y  ;

i a

! PRELIMINARY NOTIFICATION j I.

R:}

,u. ~

. jr m

-! M 6230200 760723

'I PDR IE PDR PNO-76-128 _ .  ;.._.. . _ _ _ _ _ .

W

• t