ML12277A027

Slides - Summary of Meeting with Duke Energy Carolinas to Discuss Noncenservative Technical Specifications License Amendment Requests

ML12277A027
Person / Time
Site:	Harris
Issue date:	10/02/2012
From:	Duke Energy Carolinas
To:	Billoch-Colon A Plant Licensing Branch II
Billoch-Colon, Araceli
Shared Package
ML12277A023	List: ML12277A027
References
Download: ML12277A027 (10)

Text

Presubmittal Conference Call Harris TS Changes Degraded Grid Voltage Timing Relay Setpoint LOOP Voltage Setpoint EDG Voltage Limits Oct. 2, 2012 For Information Purposes Only

Harris Participants John Caves Alan Morisi Mark Grantham Vinod Puri Ryan Kruse Dean Tibbitts Brian Mayall Greg Kilpatrick For Information Purposes Only

Meeting Objectives

• Describe upcoming Harris Technical Specification change requests that will involve Electrical Division as primary reviewers

• Preclude questions not addressed by our application that would challenge NRC LIC-109 Acceptance Review

• Describe planned bases for the changes

• Obtain Reviewer comments and/or concerns with the planned approach

• Identify appropriate precedent License Amendment Requests

• Describe submittal and desired approval schedule 3

For Information Purposes Only

Agenda

• Background

• Loss of Offsite Power Voltage Allowable Value

• Degraded Grid Voltage Timing Relay Allowable Value

• Emergency Diesel Generator Voltage Tolerance

• Schedule 4

For Information Purposes Only

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Background===

Non-conservative Tech Specs Identified

• Loss of Offsite Power Voltage Setpoint Operable but non-conforming supported by field setting

• Degraded Grid Voltage Timing Relay Allowable Value Operable but non-conforming supported by field setting and alternate analysis

• Emergency Diesel Generator Voltage Tolerances Operable but non-conforming supported by field setting 5

For Information Purposes Only

LOOP Voltage Setpoint

• TS 3.3.2.b Engineered Safety Features Actuation System Instrumentation

• ESFAS Setpoints Table 3.3-4, Functional Unit 9.a.

• Current TS Allowable Value: 4830 volts (70% of nominal bus voltage)

• Field setting: 5310 volts

• Proposed Trip Setpoint: 5310 volts (80.4% of rated motor voltage)

Allowable Value: 5106 volts (77.4% of rated motor voltage)

• Basis: 75% motor rated voltage and voltage loss from bus to motor terminals.

6 For Information Purposes Only

DGV Timing Relay Setpoint

• TS 3.3.2.b Engineered Safety Features Actuation System Instrumentation

• ESFAS Setpoints Table 3.3-4, Functional Unit 9.b.

• Current Allowable Value: 18 seconds

• Field setting: 13 seconds

• Proposed Trip Setpoint: TBD - approximately 11 sec.

Allowable Value: TBD - approximately 13 sec.

• Basis: RIS 2011-12 Guidance - Setpoint will support the Design Basis Accident timeline 7

For Information Purposes Only

EDG Voltage Setpoint

• TS 3.8.1.1.b Onsite Electrical Power

• Current TS 4.8.1.1.2.a.4: EDG can start with generator voltage 6900 volts +/- 690 volts (10%)

• Field setting: 6900 volts +/- 120 volts (1.74%)

• Proposed TS: 6900 volts +/- 276 volts (4%)

• Basis: Supports Safety-Related equipment performance at allowable values 8

For Information Purposes Only

Schedules

• LOOP Voltage Allowable Value Submit: October 31, 2012 Requested Approval: October 31, 2013

• Degraded Grid Voltage Timing Relay Submit: November 30, 2012 Requested Approval: November 30, 2013

• Emergency Diesel Generator Voltage Submit: February 28, 2013 Requested Approval: February 28, 2014 9

For Information Purposes Only

Closing Comments 10 For Information Purposes Only