ML18033A752

Provides Clarification to Sizing Criteria for Thermal Overload Heaters.Trip Setting for 200% Nominal Torque Current Is 1 Duty Cycle & 8 Minutes (Ac)

ML18033A752
Person / Time
Site:	Browns Ferry
Issue date:	05/15/1989
From:	Michael Ray TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TAC-62260-F, NUDOCS 8905220126
Download: ML18033A752 (5)

Text

,~~CELEP>TED DIQRlBUTION DEMONS'EON SYSTEM r

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8905220126 DOC.DATE: 89/05/15 NOTARIZED: NO FACIL:50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee AUTH.NAME AUTHOR AFFILIATION RAY,M.J.

Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Provides clarification to sizing criteria for thermal overload heaters,per NRC comments.

DISTRIBUTION CODE:

D030D COPIES RECEIVED:LTR J ENCL +

SIZE:

TITLE: TVA Facilities Routine Correspondence DOCKET 05000260 R

NOTES:1 Copy each to: S.Black,D.M.Crutchfield,B.D.Liaw, R.Pierson,B.Wilson 05000260 g RECIPIENT ID CODE/NAME SIMMS,M GEARS,G COPIES LTTR E CL RECIPIENT ID CODE/NAME PD COPIES LTTR E CL 1

h INTERNAL: ACRS OC FMB G F EXTERNAL: LPDR NSIC NOTES'1 NUDOCS-ABSTRACT OGC/HDS2 NRC PDR D

S R

I D

h NOTE 'IO ALL "RIDS" RECIPIERIS'IZASE HELP US 1O REDUCE HASTE CXKIACZ IHE DOCUMEÃZ CONZROL DESKS RXM Pl-37 (EZ1'. 20079)

KO EIZKQCQZ YOUR NAME FBGM DISTIGBVZIGN LISTS H)R DOCUMENZS YOU DON'T NEZDt TOTAL NUMBER OF COPIES REQUIRED:

LTTR 16 ENCL D

S

/

TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 37401 5N 157B Lookout Place SIN 1$ I58 U.S. Nuclear Regulatory Commission ATTN:

Document Control Desk Hashington, D.C, 20555 Gentlemen:

Docket No. 50-260 In the Matter of

)

Tennessee Valley Authority BRONNS FERRY NUCLEAR PLANT (BFN) THERMAL OVERLOAD (TOL) HEATERS SIZING CRITERIA CLARIFICATION (TAC No. 62260-F)

Reference:

TVA letter to NRC dated February 28,

1989, "Browns Ferry Nuclear Plant (BFN) Thermal Overload (TOL) Heaters (TAC No. 62260-F)"

This letter provides clarification to the sizing criteria given in the referenced letter'.

This information is being provided in response to comments by the NRC staff.

The trip setting for 200 percent nominal torque current, given in QIR EEBGEN88095Rl, is as follows:

Current 200 percent nominal torque current (141 percent full load current)

Tri Settin 1 duty cycle (ac and dc) and 8 minutes (ac)

(not applicable for dc)

If you have any questions, please telephone Patrick P. Carier, BFN Site Licensing, at (205) 729-3570.

Very truly yours, TENNESSEE VALLEY AUTHORITY cc:

See page 2

P.

Manag

, Nuclea icensing and Regulatory Affairs 8905220i26 S905i5 PDR ADOCK 05000260 P

PDC An Equal Opportunity Employer

0 f

A

)

U.S. Nuclear Regulatory Commission cc:

Ms, S.

C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Browns Ferry Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637

Athens, Alabama 35609-2000