ML14205A268

Watts Bar 2 - RAI - Developmental Tech Specs Rev I

ML14205A268
Person / Time
Site:	Watts Bar
Issue date:	07/22/2014
From:	Miernicki M J Watts Bar Special Projects Branch
To:	Arent G P Tennessee Valley Authority
References
Download: ML14205A268 (3)

Text

1 NRR-PMDAPEm Resource From: Miernicki, Michael Sent: Tuesday, July 22, 2014 5:03 PM To: garent@tva.gov; rhbryan@tva.gov Cc: Quichocho, Jessie; Poole, Just in; Elliott, Robert; Snyder, Pete

Subject:

Watts Bar 2 - RAI - Developmental Tech Specs Rev I Attachments:

RAI WBN2 T.S.Rev I - STSB -Bases 3 0 6.docxAttached please find an RAI from the Technical Specifications Branch regarding Watts Bar 2 Developmental Technical Specifications Revision I. Please acknowledge receipt of this question, and provide your response within 30 days.

Mike Michael J. Miernicki Sr. Project Manager NRC/NRR/DORL/LP-WB 301-415-2304

Hearing Identifier: NRR_PMDA Email Number: 1449 Mail Envelope Properties (Michael.Miernicki@nrc.gov20140722170200)

Subject:

Watts Bar 2 - RAI - Developmental Tech Specs Rev I Sent Date: 7/22/2014 5:02:47 PM Received Date: 7/22/2014 5:02:00 PM From: Miernicki, Michael Created By: Michael.Miernicki@nrc.gov Recipients: "Quichocho, Jessie" <Jessie.Quichocho@nrc.gov> Tracking Status: None "Poole, Justin" <Justin.Poole@nrc.gov>

Tracking Status: None "Elliott, Robert" <Robert.Elliott@nrc.gov> Tracking Status: None "Snyder, Pete" <Pete.Snyder@nrc.gov> Tracking Status: None "garent@tva.gov" <garent@tva.gov>

Tracking Status: None "rhbryan@tva.gov" <rhbryan@tva.gov> Tracking Status: None

Post Office: Files Size Date & Time MESSAGE 341 7/22/2014 5:02:00 PM RAI WBN2 T.S.Rev I - STSB -Bases 3 0 6.docx 21073 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

REQUEST FOR ADDITIONAL INFORMATION REVIEW AND LICENSING OF TECHNICAL SPECIFICATIONS WATTS BAR NUCLEAR PLANT UNIT 2 DOCKET NUMBER 50-391 By letter dated June 16, 2014, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14169A525), Tennessee Valley Authority, (the Licensee) submitted a developmental revision I of the Watts Bar Unit 2 Technical Specifications and Technical Specifications Bases, for review and licensing by the U.S. Nuclear Regulatory Commission.

During review of the basis for Limiting Condition for Operation (LCO) 3.0.6 the staff has determined that additional information is required.

LCO 3.0.6 establishes an exception to LCO 3.0.2 for support systems that have an LCO specified in the Technical Specifications (TS). In the case where the support system is included in TS the associated actions for each supported system only have to be met to the extent specified in the action for the support system.

Structures, systems or components (SSC) that are not explicitly required to be operable by TS but that perform required support functions for SSCs that are required to be operable by TS fall within the scope of a functionality assessment of a condition adverse to quality as addressed in

NRC Inspection Manual Chapter 0326.

On page B 3.0-9 and continued on page B 3.0-10, a non-standard paragraph has been added to the TS bases in revision I for use "In cases where a non-TS support system has two redundant 100 percent capacity subsystems, -" The paragraph continues, "loss of one support system does not result in a loss of support for either train of TS equipment. Both TS systems [remain]

operable, despite a loss of support function redundancy, because the TS definition of operability does not require a TS subsystem's necessary support function to meet the single failure criterion. - "

Request for Additional Information

Since the additional paragraph on pages B 3.0-9 and B 3.0-10 does not summarize the reason for LCO 3.0.6, but adds a new condition to LCO 3.0.6 such that LCO 3.0.6 may now be applied to a non-TS support system, please explain the bas is for inclusion of this paragraph in the TS bases.

Regulatory Basis Per 10 CFR 50.36(a)(1), "A summary statement of the bases or reasons for such specifications, other than those covering administrative controls, shall also be included in the application, but shall not become part of the technical specifications."