ML18102B430

Sequoyah Units 1 and 2 - Supplement to License Amendment Request to Modify Essential Raw Cooling Water Motor Control Center Breakers and to Revise the Updated Final Safety Analysis Report

ML18102B430
Person / Time
Site:	Sequoyah
Issue date:	04/11/2018
From:	Shea J W Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-18-054, SQN-TS-17-04
Download: ML18102B430 (5)

Text

{{#Wiki_filter: Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL-18-054 April 11, 2018 10 CFR 50.4 10 CFR 50.90 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Renewed Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

Supplement to Sequoyah Nuclear Plant, Units 1 and 2 License Amendment Request to Modify Essential Raw Cooling Water Motor Control Center Breakers and to Revise the Updated Final Safety Analysis Report for Sequoyah Nuclear Plant Units 1 and 2 (SQN-TS-17-04)

Reference:

TVA Letter to NRC, CNL-17-150, "Sequoyah Nuclear Plant, Units 1 and 2 License Amendment Request to Modify Essential Raw Cooling Water Motor Control Center Breakers and to Revise the Updated Final Safety Analysis Report Sequoyah Nuclear Plant Units 1 and 2 (SQN-TS-17-04)," dated March 9, 2018 (ML18071A349) In the referenced letter, Tennessee Valley Authority (TVA) submitted a request for an amendment to Renewed Facility Operating License Nos. DPR-77 and DPR-79 for the Sequoyah Nuclear Plant (SQN), Units 1 and 2, respectively. The proposed change would modify Essential Raw Cooling Water (ERCW) Motor Control Center (MCC) Breakers and revise the Updated Final Safety Analysis Report for SQN Units 1 and 2 (SQN-TS-17-04). Based on a verbal request from the Nuclear Regulatory Commission, the enclosure to this letter supplements the reference license amendment request by providing SQN 35W716-1 and 2, Single Line Diagrams for the 1A-A, 2A-A, 1B-B, and 2B-B ERCW MCCs. This supplement does not change the no significant hazards consideration contained in the referenced letter. There are no new regulatory commitments made in this letter. Please address any questions regarding this request to Mr. Edward D. Schrull at (423) 751-3850. U. S. Nuclear Regulatory Commission CNL-18-054 Page 2 April 11, 2018 I declare under penalty of perjury that the foregoing is true and correct. Executed on this 11th day of April 2018. Vice resident, Nuclear Regulatory Affairs and Support Services

Enclosure:

SQN 35W716-1 and 2, Single Line Diagrams for the 1A-A, 2A-A, 1 B-B, and 28-B ERCW MCCs cc (Enclosure): NRC Regional Administrator -Region II NRC Senior Resident Inspector -Sequoyah Nuclear Plant NRC Project Manager -Sequoyah Nuclear Plant Director, Division of Radiological Health -Tennessee State Department of Environment and Conservation (w/o enclosure) Enclosure SQN 35W716-1 and 2 Single Line Diagrams for the 1A-A, 2A-A, 1B-B, and 2B-B ERCW MCCs A B c 0 E F G H l 2 3 4 SEE NOTE i 5 {;")OPEN 5ycLOSE r,')oPEN 6yclOSE 9STAR.' STOP '°' ' 7 8 FROMS.9KVSHUTOO\llN BOARD2A-A(i5N72'1-3) 1XfMR2/\-A 9 1---------, I 2 2-+oo-5 AS A I ' ' I I BODA )--5 SEE NOTES 6 AND 15 I I LS 2-i\-+80 I ' 181 4 (1A SEENOTE6 TEST ANN I 250A NO .1 I __J cL Y L ,,L;==i1*""'°'"'I"' L 600A r-.:!,----,,----------_ 1 TO CONT T 0 SHRT 0 STOP ---;-;,;-I ! " ilg;/'°' ! I e < )--* I: snl 250s"'HUNT I TRIP 200A <] <] <] <] :i !i <] <] <] <] <] 0) I H"

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