ML19341A460

Final Deficiency Rept,Initially Reported 801216,re Environ Qualification of Electrical Equipment.Automatic Switch Co HT83316B15 Solenoids Will Be Replaced W/Valcor Model 70900-301 Valves Qualified for Calculated Accident Environ

ML19341A460
Person / Time
Site:	Sequoyah
Issue date:	01/15/1981
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, SQRD-50-328-81, NUDOCS 8101230562
Download: ML19341A460 (2)

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400 Chestnut Street Tower II January 15, 1981 SQRD-50-328/81-07 l 1

l 9 ,g- i Mr. JamesP. O'Reilly, Director Office of Ihpection and Enforcement D

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• '}~\ o U.S. Nuclear Regulatory Consnission Region II - 3uit 3100 101 Marietta Stree Atlanta, Gecraia 30K3

Dear Mr. O'Reilly:

SEQUOYAH NUCLEAR PLANT UNIT 2 - ENVIRONMENAL QUALIFICATION CF ELECTRICAL EQUIPMENT - SQRD-50-328/81 FINAL REPORT The subject deficiency was initially reported to NRC-OiE Inspector R. W. Wright en December 16, 1980, in accordance with 10 CFR 50.55(e) as NCR SQN SWP 8028. Enclosed is our final report.

If you have any questions, please get in' touch with D. L. Lambert at FTS 657-2561.

Ver t truly yours, TENNE.SSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Enclosure /

cc: Mr. Victor Stello, Director (Enclosure)V Office of Inspection and Enforcement U.S. Nuclear P.cgulatory Consission Washington, DC 20555 Qoll

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.p ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 ENVIRONMENTAL QUALIFICATION OF ELECTRICAL EQUIPMENT SQRD-50-328/81-07 10 CFR 50.55(e)

FINAL REPORT Description of Deficiency During the review of qualification records for electrical equipment required by NUREG-0588, three solenoid valves in the containment vacuum relief system were determined to be not qualified for the calculated accident environment to which they would be exposed in the-containment annulus. The valves are model No. HT83316B15 and are manufactured by Automatic Switun Company (ASCO). The postulated accident environment is noted below:

Temperature: 150 F Pressure: ATM -

Relative Humidity: 100%

Radiation: 7x107 rads Safety Implications Failure of these solenoids to function properly in the event of an accident cauld possibly result in the inability of the contain=ent vacuum relief system to perform its intended safety function, thereby endangering the health and safety of the public.

Corrective Action TVA will replace the subject ASCO solenoids with valves that are qualified for the calculated accident environment (Valcor Model 70900-301). This work will be accomplished approximately one month before fuel loading of unit 2.

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