ML19340E424

First Interim Deficiency Rept Re Environ Qualification of safety-related Electrical Equipment.Vendor Indicated Solenoid Valves Not Qualified for post-accident Environ in Annulus.Next Rept Will Be Submitted by 810212

ML19340E424
Person / Time
Site:	Sequoyah
Issue date:	01/08/1981
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 8101140474
Download: ML19340E424 (2)

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i 403 Che::tnut Street Tcwor II January 8, 1981 SQRD-50-328/81-04  : .- i Mr. James P. 'Reilly, Director -

Office of Inzp tien and Enforcement U.S. Nuclear Re latory Consission ~

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Regicn II - Suite 100 101 Marietta Stree .

Atlanta, Georgia 3 03 Dear Mr. O'Reillyt /

SEQUOTAH NUCLEAR PLANT UNIT 2 - ENVIRONMENTAL QUALIFICATION OF SAFETY-RELATED ELECIRICAL EQUIPMENT - SQRD-50-328/81 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. W. Wright on December 8,1980, in accordance with 10 CFR 50 55(e) as NCR SQN EB 8044RI. Enclosed is our first interim report. We expect to submit our next report by February 11, 1981.

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

Very truly yours,

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TENNESSEE VALLEY AUTHOPJTY L. M. Mills, Manager Nuclear Regulation and Safety Enclosure Mr. Victor Stallo, Director (Enclosure),v f

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Office of Inspection and Enfcrcoment U.S. Nuclear Regulatory Commission Washington, DC 20555 pd/7 g//

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ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2

. ENVIRONMEffrAL QUALIFICATION CF ELECTRICAL EQUIPMENT SQRD-50-328/81-04 FIRST INTERIM REPORT Description of Deficiency Automatic Switch Company (ASCO) solenoid valves (models HB8300C58RU, HB8262C22, HTX8320A22V, and HT8316C15) are used to control various containment isolation valves in the plant control air, radiation monitoring, and ventilation systems. The subject valves are located in the annulus region. Information obtained from ASCO indicated that the solenoids in question were not qua'iified for the following i postaccident environment in the annelus:

Temperature: , 1500 F Pressure: -

Atmospheric Relative Humidity: 100peycent

Radiation

7 X 10 rada i

Interim Progress i TVA is continuing its investigation to determine whether the subject valves should be either repaired, relocated, or replaced.

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