ML16112A011

Duke Presentation in Support of April 28, 2016 Pre-Submittal Meeting Catawba Nuclear Station, Units 1 and 2, License Amendment Request Proposed TS Bases Descriptions for Shared Systems

ML16112A011
Person / Time
Site:	Catawba
Issue date:	04/28/2016
From:	Duke Energy Carolinas
To:	Division of Operating Reactor Licensing
Whited, Jeffrey, NRR/DORL/LPLII-1
References
CAC MF7583, CAC MF7584
Download: ML16112A011 (9)

Text

Catawba Nuclear Station - License Amendment Request Proposed TS Bases Descriptions for Shared Systems April 28, 2016

Duke Energy Participants Art Zaremba (Manager, Nuclear Fleet Licensing)

Jordan Vaughan (Fleet Regulatory Affairs)

Cecil Fletcher (Manager, Catawba Regulatory Affairs)

Randy Herring (Catawba Engineering) 2 2

Outline Proposed Change

Reason for Request

LAR Technical Content LAR Regulatory Content Schedule 3

Proposed Change License Amendment Request (10 CFR 50.90) to revise the Technical Specification (TS) Bases for the following shared systems:

Nuclear Service Water System (NSWS)

Control Room Area Ventilation System (CRAVS)

Control Room Area Chilled Water System (CRACWS)

Auxiliary Building Filtered Ventilation Exhaust System (ABFVES)

Add descriptions for crediting one emergency diesel generator on a unit in MODE 5 or 6 (i.e.,

shutdown unit) as the emergency power source for operability of the NSWS, CRAVS, CRACWS, ABFVES shared components aligned to the opposite unit in MODE 1, 2, 3 or 4 (i.e.,

online unit) 4

Reason for Request

Current Engineered Safety Features (ESF) testing alignment for shared systems One shared train is aligned to a shutdown unit and is declared INOPERALBE TS Bases at Catawba specify a normal and emergency power source is needed for operability If the shared train aligned to the online unit becomes inoperable for any reason, the result may be a TS Limiting Condition for Operation (LCO) 3.0.3 type situation The proposed change is desired to eliminate the higher risk associated with TS LCO 3.0.3 type situations The proposed change is also desired to avoid situations where Catawba may consider a Notice of Enforcement Discretion (NOED) request 5

License Amendment Request - Technical Content Statement proposed for insertion into the NSWS, CRAVS, CRACWS and ABFVES TS Bases:

"Crediting one of the emergency diesel generators associated with a unit in MODE 5 or 6 as the emergency power source for OPERABILITY of the [NSWS] [CRAVS] [CRACWS] [ABFVES]

shared components that are aligned to the other unit that is in MODES 1, 2, 3 or 4, is acceptable, provided the following conditions are met:

The credited emergency diesel generator associated with the unit in MODE 5 or 6 meets applicable TS 3.8.1 LCO and SR requirements, and The credited emergency diesel generator associated with the unit in MODE 5 or 6 meets TS 3.8.3 LCO and SR requirements, and Shared 600v Motor Control Centers meet TS 3.8.9 LCO and SR requirements, and The credited emergency diesel generator associated with the unit in MODE 5 or 6 meets the requirements of the TS 1.1 definition of OPERABLE/OPERABILITY."

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License Amendment Request - Regulatory Content No Technical Specification Changes (TS Bases changes only)

General Design Criterion 5, Sharing of structures, systems and components - no impact General Design Criterion 17, Electric power systems - no impact General Design Criterion 18, Inspection and testing of electric power systems - no impact Continue to meet Safety Guide 6 (i.e., original revision of Regulatory Guide 1.6), Independence Between Redundant Standby (Onsite) Power Sources and Between their Distribution Systems 7

Schedule Submittal of License Amendment Request pursuant to 10 CFR 50.90 by May 31, 2016 Requesting approval of the proposed change to the TS Bases prior to implementation Requesting Staff approval of the application within one year of the date of submittal 8

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