ML14233A564

NRR E-mail Capture - Watts Bar 2 - RAI - Developmental Tech Specs Rev I

ML14233A564
Person / Time
Site:	Watts Bar
Issue date:	08/19/2014
From:	Miernicki M Division of Operating Reactor Licensing
To:	Arent G Tennessee Valley Authority
References
Download: ML14233A564 (3)

Text

NRR-PMDAPEm Resource From: Miernicki, Michael Sent: Tuesday, August 19, 2014 3:03 PM To: garent@tva.gov; rhbryan@tva.gov Cc: Quichocho, Jessie; Poole, Justin; Casto, Greg; Wheeler, Larry; Snyder, Pete; Lingam, Siva

Subject:

Watts Bar 2 - RAI - Developmental Tech Specs Rev I Attachments: RAI WBN2 T S Rev I - SBPB.docx Attached please find an RAI from the Balance of Plant 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 1

Hearing Identifier: NRR_PMDA Email Number: 1518 Mail Envelope Properties (Michael.Miernicki@nrc.gov20140819150300)

Subject:

Watts Bar 2 - RAI - Developmental Tech Specs Rev I Sent Date: 8/19/2014 3:03:28 PM Received Date: 8/19/2014 3:03:00 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 "Casto, Greg" <Greg.Casto@nrc.gov>

Tracking Status: None "Wheeler, Larry" <Larry.Wheeler@nrc.gov>

Tracking Status: None "Snyder, Pete" <Pete.Snyder@nrc.gov>

Tracking Status: None "Lingam, Siva" <Siva.Lingam@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 331 8/19/2014 3:03:00 PM RAI WBN2 T S Rev I - SBPB.docx 22469 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

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

Watts Bar Unit 2, Technical Specifications Bases Section 3.7.1, Main Steam Safety Valves (MSSVs), Limiting Condition for Operation, (LCO) states that the accident analysis requires that five MSSVs per steam generator be OPERABLE to provide overpressure protection for design basis transients occurring at 102% reactor thermal power (RTP). The LCO Applicability requires that five MSSVs per steam generator be OPERABLE in compliance with Reference 2 and the DBA analysis.

Watts Bar Unit 1, Technical Specifications Bases Section 3.7.1, Main Steam Safety Valves (MSSVs), LCO states that the accident analysis requires that five MSSVs per steam generator be OPERABLE to provide overpressure protection for design basis transients occurring at 100.6% RTP. The LCO applicability requires that five MSSVs per steam generator be OPERABLE in compliance with Reference 2 and the DBA analysis.

Issue:

Description of MSSVs overpressure protection for design basis transients related to RTP between Watts Bar Units 1 and 2 are different.

RAI:

Clarify why there is a difference between Watts Bar Unit 1 and Watts Bar Unit 2 with respect to overpressure protection and RTP.