ML13308A007

Open Phase Resolution Update Meeting Duke Energy Entitled Open Phase Detection and Protection.

ML13308A007
Person / Time
Site:	Oconee, Mcguire, Catawba, Harris, Brunswick, Crystal River, Robinson, McGuire
Issue date:	11/01/2013
From:	Duke Energy Corp
To:	Office of Nuclear Reactor Regulation
Holonich J, 301-415-7297
References
Download: ML13308A007 (5)

Text

Open Phase Detection and Protection NRC Public Meeting November 1, 2013 1

Open Phase Detection and Protection Meter as Relay Solution Standard pickup; low level processing Modified Solution Dual level sensors (excitation and power ranges)

Low power level alarm; high power level trip Redundant packages (SPV and reliability) 2 sets of sensors 2 sets of relay cabinets (to be installed adjacent to transformers) 2

Open Phase Detection and Protection Plant Unit Transformers Comments 1 Main SUT Brunswick 2 Main SUT 1A 1B 1 New SUTs at Catawba are not included. OPD will be addressed in the SUT project if it proceeds.

Main Main Catawba 2A 2B 2 New SUTs at Catawba are not included. OPD will be addressed in the SUT project if it proceeds.

Main Main Crystal River 3 OPT BEST Skip if fuel is in final storage?

SAT Harris 1 Main SAT 1A 1B Skip Main if we never backfeed?

1A 1B 1

Main Main McGuire 2A 2B 2

Main Main Robinson 2 Main SUT 1 SUT 2 Skip Main if we never backfeed?

1-3 CT1 CT2 CT3 CT4 CT5 Skip CT4 and CT5 if designated as safety power supplies?

1 Main Outage backfeeds are typical Oconee 2 Main Outage backfeeds are typical 3 Main Outage backfeeds are typical Totals 22 Transformers minimum.

24 Transformers likely (including the HNP and RNP Mains).

28 Transformers possible.

3 We want redundant systems for SPV and reliability.

Open Phase Detection and Protection 2014 2015 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec BNP1 BNP2 CNS1 CNS1 CNS2 HNP MNS1 MNS2 MNS2 ONS1 ONS2 ONS3 RNP 2016 2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec BNP1 BNP2 CNS1 CNS2 HNP MNS1 MNS1 MNS2 ONS1 ONS2 ONS3 4

RNP

Open Phase Detection and Protection Project Concerns:

Final scope (number of transformers to be protected).

Multi-site, multi-plant, short, integrated schedule.

Available suppliers.

Verify that LAR will not be required or schedule LAR for Tech Spec updates.

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