CNL-14-073, 151-1 and 13-151-2 Relief Request Interval Applicability Clarification

151-1 and 13-151-2 Relief Request Interval Applicability Clarification

ML14132A077
Person / Time
Site:	Sequoyah
Issue date:	05/09/2014
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-14-073, TAC MF2900, TAC MF2901
Download: ML14132A077 (2)

Text

Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL-14-073 May 9, 2014 10 CFR 50.4 10 CFR 50.55a ATTN : Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

5equoyah 13-151-1 and 13-151-2 Relief Request Interval Applicability Clarification (TAC Nos. MF2900 and MF2901)

References:

1. Letter to NRC, "Requests for Alternatives 13-ISI-1 and 13-ISI-2 to Extend the Reactor Vessel Weld lnservice Inspection Interval," dated October 15, 2013 (ADAMS Accession No. ML13291A006)

2. Westinghouse Report WCAP-16168-NP-A, Revision 3, "Risk-Informed Extension of the Reactor Vessel In-Service Inspection Interval,"

October 25, 2011 (ADAMS Accession No. ML113060207)

By letter dated October 15, 2013 (Reference 1), Tennessee Valley Authority (TVA) requested that the Nuclear Regulatory Commission (NRC) approve the proposed inservice inspection (lSI) alternatives 13-ISI-1 and 13-ISI-2.

Specifically, these proposed alternatives requested a one-time ten-year extension to selected ASME Examination Category B-A reactor vessel welds and selected ASME Examination Category B-D reactor vessel nozzle welds and reactor vessel inside radius sections for each unit.

Based on a May 5, 2014 discussion with Mr. Andrew Hon, the Sequoyah NRC Project Manager, TVA clarifies that the extension request for 13-ISI-1 and 13-ISI-2 examination exemptions are for the 3rd lSI Interval, which is currently from June 1, 2006, to April 30, 2016. With the NRC approval, the 3rd lSI interval will be extended to April 30, 2026, for the examinations listed in Reference 1.

U.S. Nuclear Regulatory Commission Page 2 May 9, 2014 The requested "Duration of Proposed Alternative" in Reference 1 (Enclosures 1 and 2, Page 4 of 6) should have only referred to the 3rd interval. The alternatives will not affect the duration of the 41h interval. This approach is in line with the wording in WCAP-16168-NP-A (Reference 2).

There are no new regulatory commitments contained in this letter. Please address any questions regarding this submittal to Henry Lee at (423) 751-2683.

Respectf~

J. VV. She~~

Vice President, Nuclear Licen cc:

NRC Regional Administrator- Region II NRC SQN Senior Resident Inspector NRC SQN Project Manager- Andrew.Hon@nrc.gov