LG-83-049, Forwards Response to 821210 Request for Addl Info on IE Bulletin 81-03, Flow Blockage of Cooling Water to Safety Sys Components by Corbicula Sp (Asiatic Clam) & Mytilus Sp (Mussel). Monitoring Program for Clams to Be Established

Forwards Response to 821210 Request for Addl Info on IE Bulletin 81-03, Flow Blockage of Cooling Water to Safety Sys Components by Corbicula Sp (Asiatic Clam) & Mytilus Sp (Mussel). Monitoring Program for Clams to Be Established

ML20064L089
Person / Time
Site:	Cherokee
Issue date:	01/17/1983
From:	Dail L DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-SSINS-6820 IEB-81-03, IEB-81-3, SLG-83-049, SLG-83-49, NUDOCS 8302150108
Download: ML20064L089 (2)

Text

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• a DUKE POWER COMPANY ELECTRIC CENTER, Hox 33189, CurHLorrE. N. C. 28242 oubh"$L January 17, 1983 SLG-83-049 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 At1anta, GA - 30303' "

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Re: RII:JP0 Cherokee Nuclear Station Docket Nos. 50-491, 50-492, and 50-493 R IE Bulletin 81-03

Cake File: P81-1412.ll-01 ^

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Dear Mr. O'Reilly:

Attached is Duke Power Company's response to a December 10, 1982 letter requesting additional information on IE Bulletin 81-03 for Cherokee Nuclear Station.

I declare under penalty of perjury, that the statements setforth herein are true and correct to the best of my knowledge.

Very truly yours ,

L. C. Dail, Vice-President Design Engineering Department JHS/pam Attachmeni cc: Director, Division of Engineering and Quality Assurance Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC 20555 8302150108 830117 PDR ADOCK 05000491 Q PDR IE ((

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DUKE POWER COMPANY CHER0KEE NUCLEAR STATION RESPONSE TO REQUESTED ADDITIONAL INFORMATION ON IE BULLETIN 81-03 Number items listed below are in direct reference to IE Bulletin 81-03 and the requested additional information.

1. (1) Corbicula sp. are present in the Broad River which is a source of water for Cherokee Nuclear Station.

(4a) At present few systems have been completed and filled with water and therefore, only a discussion of intrusion potential is provid-ed. All cooling water systems are closed loop systems: Nuclear Service Water (RN), HVAC, Low Pressure Service Water (RL) and Con-denser Circulating Water (RC) systems will all be treated with sufficient biocides and/or chlorine to control clam growth. Exte-rior and interior fire protection systems will be protected by a combination of biocide and a system of strainers. All other non-safety related raw water intake structures will be visually inspected and clams removed by appropriate means such as physical removal, flushing, local treatment with biocide or screening /

filtering procedures.

3.a. It is anticipated that as the various systems and ponds are filled with water, a monitoring program for clams will be established which will be similar to those in palce at operating plants.

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