ML20028F455

RO 83-02:during Functional Test,Discovered Ruskin Mfg Co Vertical Fire Dampers Will Not Completely Close in Ductwork W/High Velocity Air Flow.Installation of Negator Spring & Positive Blade Latch Recommended

ML20028F455
Person / Time
Site:	Sequoyah
Issue date:	01/27/1983
From:	Green H TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-83-02, RO-83-2, NUDOCS 8302010368
Download: ML20028F455 (2)

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TENNESSEE VALLEY. AUTHORITY CH ATTANOOGA. TENNESSEE 374o1 1750 Chestnut Street Tower II January 27, 1983 c.o Mr. James P. O'Reilly, Director 3 U.S. Nuclear Regulatory Commission ] _

Office of Inspection and Enforcement ~~

2 Region II . ;.

101 Marietta Street, Suite 3100 .; ,

Atlanta, Georgia 30303 .7 .

Dear Mr. O'Reilly:

TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUCLEAR PLANT UNIT 1 - DOCKET No. 50-327 - FACILITY OPERATING LICENSE DPR-77 SPECIAL REPORT NO. 83-02 .

The enclosed special report provides information concerning fire dampers being non-functional for a period in excess of seven days. This report is submitted in accordance with Sequoyah unit 2 Technical Specification 3.7.12.

Very truly yours, 4

TENNESSEE VALLEY AUTHORITY a

. J. Green Director of Nuclear Power Enclosure cc (Enclosure):

Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Records Center Institute of Nuclear Power Operations Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 NRC Inspector, Sequoyah OFFICIAIjCOG h 4 c2.,

8302010368 830127 gDRADOCK 05000327 PDR An Equal Opportunity Employer

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o SEQUOYAll NUCLEAR PIANT SPECIAL REPORT 83-02 Event Description Special Test SQ-STEAR-INST-83-01 was written and performed as a result of NCR SQNMEB8207. The functional test performed on the Ruskin Manufacturing Company vertical fire dampers provided information that this particular type damper may not completely close when re. cased where installed in ductwork with high velocity air flow. There are apgroximately 120 of these dampers located in the control and auxiliary building that are involved. Firewatch coverage as required by technical specification 3. 7.12 was initiated.

Corrective Action Ruskin Manufacturing Company has recommended that a negator spring and positive blade latch be installed. These parts have been ordered and upon verification that this modification will result in the proper operation of the damper, then all the remaining dampr.rs will be modified.

In the interim, technical specification action statement 3/4.7.12.a will continue to be implemented.

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