ML20004C081

First Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Submitted 810423.Analysis of safety-related Requirements Imposed by Design Criteria Is in Progress

ML20004C081
Person / Time
Site:	Yellow Creek
Issue date:	05/26/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, YCRD-50-566-81, YCRD-50-567-81, NUDOCS 8106010490
Download: ML20004C081 (2)

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400 Chestnut Street Tower II May 26, 1981 Q \ \ .? [j'b/'

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ca '* Nw Mr. J P. O'Reilly, Director #

Office Inspection and Enforcement 4 ge U.S. Nucl Regulatory Commission &

Region II Suite 3100 101 Mariett Street Atlanta, Geor a 30303

Dear Mr. O'Reilly:

YELLOW CREEE NUCLEAR PLANT UNITS-1 AND 2 - COOLING T0 lier M&EEUP CONTROL -

YCRD-50-566/81-15, ICRD-50-567/81 FIRST IltrERid REPORT The subject deficiency was initially mported to NRC-0IE Inspector J. Crlenjak on April 23, 1981 in accordance with 10 CFR 50.55(e) as NCR ICN !!EB 8102. Enclosed is our first interim mport. We expect to submit our next report by July 8,1981.

If you have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 857-2581.

Very truly yours, l TElINESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Enclosure oo: Mr. Victor Stello, Jr., Director (Enclosure)

Office of Inspectian and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 F

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ENCLOSURE YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 COOLING T0!iER MAKEUP CONTROL YCRD-50-566/81-15, YCRD-50-567/81-12 10 CFR 50.55(e)

FIRST I)frERIM REPORT Description of Deficiency TVA Heat Rejection Design Criteria N8-KH-D740 and Essential Faw Cooling Water (ERCW) Design Criteria N8-KE-D740 impose primary safety elated requirements and the ability to sustain a single active failum on the cooling tower makeup supply. A review of the functional control logic diagram indicates that these requirements are not met by the non-Class IE controls which are provided.

Interim Progress s TVA is in the process of analyzing the safs*.y-related requf haents imposed by these des'.cn criteria.

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