ML102880493

Denial of Notice of Violation (NOV)05000391-2010603-08, Failure to Adequately Evaluate and Qualify Molded Case Circuit Breakers - Additional Information

ML102880493
Person / Time
Site:	Watts Bar
Issue date:	10/15/2010
From:	Bajestani M Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML102880493 (2)

See also: IR 05000391/2010603

Text

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000

October 15, 2010

U.S. Nuclear Regulatory Commission

ATTN: Document Control Desk

Washington, D.C. 20555-0001

Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject: Watts Bar Nuclear Plant (WBN) Unit 2 - Denial of Notice of Violation (NOV)05000391/2010603-08, Failure to Adequately Evaluate and Qualify Molded Case Circuit Breakers - Additional Information

Reference: 1. NRC letter to TVA, "Watts

Bar Nuclear Plant Unit 2 Construction - NRC Integrated Inspection Report 05000391/2010603 and Notice of Violation,"

dated August 5, 2010 (ML102170465)

2. TVA letter to NRC, "Watts Bar Nuclear Plant (WBN) Unit 2 - Denial of Notice of Violation (NOV)05000391/2010603-08, Failure to Adequately Evaluate

and Qualify Molded Case Circuit Breakers" (ML102520435)

By letter dated August 5, 2010 (Reference 1), the U.S. Nuclear Regulatory Commission (NRC) issued Inspection Report Number 05000391/2010603 concerning the April 6-30, 2010,

inspection conducted at Tennessee Valley Authority's (TVA) WBN Unit 2. By letter dated

September 7, 2010 (Reference 2), the sentence "The calculated natural frequencies of the front

cover panel in the three directions were also in excess of 33 Hz and rigid" should not have

been included in the letter at that time. This was first identified by TVA on September 13, 2010, and discussed with Theodore Fanelli and Guillermo Crespo in a meeting at WBN site on September 14, 2010. This condition has been entered in the Corrective Action Program.

Subsequently, a calculation was issued that validated the above sentence.

There are no new commitments associated with this submittal. If you have any questions, please contact William Crouch at (423) 365-2004.

U.S.Nuclear Regulatory

Commission

Page 2 October 15, 2010 I declare under penalty of perjury that the foregoing is true and correct.Executed on the 15 th day of October, 2010.Sincerely, cc: U.S.Nuclear Regulatory

Commission

Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257

NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381