ML19350E010

Responds to IE Bulletin 81-03, Flow Blockage of Cooling Water to Safety Sys Components by Corbicula Sp (Asiatic Clam) & Mytilus Sp (Mussel). No Asiatic Clams or Mussels Were Found.Biological Monitoring Program Table 4.8 Encl

ML19350E010
Person / Time
Site:	Robinson
Issue date:	05/22/1981
From:	Furr B CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-81-03, IEB-81-3, NUDOCS 8106160308
Download: ML19350E010 (4)

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May 22, 1981 d! MAY 20 Ab N File: NG-3513(R) Serial No.: NO-81-877

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Mr. James P. O'Reilly, Director .

U. S. Nuclear Regulatory Commission '

I h(LU u J Region II -- JUN 13ggg1mm.

101 Marietta Street, Suite 3100 Cs Atlanta, Georgia 30303

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H. B. ROBINSON STEAM ELECTRIC PLANT UNIT NO. 2 LICENSE NO. DFR-23 g 9 DOCKET No. 50-261 ,

RESPONSE TO IE BULLETIN 81-03

Dear Mr. O'Reilly:

In response to your letter of April 10, 1981, transmitting IE Bulletin 81-03, Carolina Power & Light Company submits the following response for H. B. Robinson Steam Electric Plant: -

No Asiatic clams (Corbicula) have been collected in Robinson Impoundment or Black Creek by CP&L biologists since the initiation of field sampling in 1974. Other studies on Black Creek below the Impound-ment and on Prrstwood Lake by Enwright Laboratories (1980) for Sonoco Paper Company bve also not found this species. Based on these investi-gations, CP&L does not believe Asiatic clams (Corbicula) are present at H. B. Robinson. This is probably due to the naturally occurring low pH and "blackwaters."

Please find attached a copy of the Robinson Impoundment Biological Monitoring Program During 1981; also included is a layout of the Robinson Impoundment and Black Creek sampling stations. The last sampling for identification of Asiatic clams was in February, 1981, with none being found in any samples. Also, on May 19, 1981, during routine cleaning of the condenser, there was an inspection for Asiatic clams (Corbicula) which showed none present.

Carolina Power & Light Company plans continued biological monitoring of the Robinson Impoundment in accordance with our NPDES Permit and the requirements of the South Carolina Department of Health and Environmental Control. There vill also be continued inspec-tion of the Robinson condensers during outages of sufficient length.

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Mussels (Mytilus 3.), a saltwater species, are not present in the freshwater of the Robinson Impoundment.

The manpower expended for this review and for the required report preparation was approwimmtely twenty-one hours.

We trust that this satisfies the requirements of IE Bulletin 81-03.

Yours very truly, B. J. Furr Vice President Nuclear Operations SHC/je (7803)

Attachments cc: Mr. Victor Stallo, Jr.

B. J. Furr, having been first duly sworn, did depose and say that the l',tformation contained herein is true and correct to his own personal  ;

kno*1 edge or based upon information and belief. .

. YYNO.L: n. L l .f SM?- l w-l I

Notary Public /

My commission expires:

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• s Table 4.3 Robinson impoundment Biological Monitoring Program buring 1981 s

Study Frecuency

. Comments W ater Chemistry Monthly Stations A-2, E-2, G (Surface and Bottom);

H, I (Surface)

• Thermal Monthly Profiles at impoundment transects and Black Creek stations Plankton, Zooplankton ' Monthly - Stations A-2, C-2, 0-2, E-2,.

F-2, G-2 Chlorophyll and Quarterly Transects A, E, G Primary Productivity

• Macroinvertebrates Quarterly Ponar grabs at Transects A,  ;

E, F, G; Artifical Substrates at Transects H, I, K Fish

• Clit Net Quarterly Transects A, F4 F, G ~

• Electrofishing Quarterly plus Transects A, E, F, G i .

September and I

October

• Seine Quarterly '

- Transects F, G

• Larval Traps and Weekly, April- Transects A, E, F, G

• Larval Push Nets August; Two days each, February and '

November

. ' Standing Crop Annually Transects A, E, G Fyke Nets Quarterly Transects A, E, F, G

• Aquatic Macrophytes Spring, Summer Entire impoundment Trace Elements (a) Quarterly Water, sediment, and fish from,A, E, and G  ;

Trace Elements (b) June Prestwood Lake and Black Creek Copper and Zinc To be determined Flushing To take place during retubing by flow rates

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