ML13044A089

1/29/2013 - R. E. Ginna Summary of Category 1 Meeting with Constellation Energy Nuclear Group Proposed Diverse and Flexible Coping Strategies (FLEX)

ML13044A089
Person / Time
Site:	Ginna
Issue date:	02/21/2013
From:	Thadani M Plant Licensing Branch 1
To:
Thadani M
References
EA-12-049
Download: ML13044A089 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 21,2013 LICENSEES: Constellation Energy Nuclear Group LLC R. E. Ginna Nuclear Power Plant LLC FACILITIES: R. E. Ginna Nuclear Power Plant

SUMMARY

OF JANUARY 29,2013, CATEGORY 1 MEETING WITH CONSTELLATION ENERGY NUCLEAR GROUP - REGARDING PROPOSED DIVERSE AND FLEXIBLE COPING STRATEGIES (FLEX) REFLECTING PLANT UNIQUE FEATURES OF R. E. GINNA NUCLEAR POWER PLANT.

On January 29, 2013, the U.S. Nuclear Regulatory Commission (NRC) staff held a public meeting with representatives of Constellation Energy Nuclear Group LLC, the licensee for R. E.

Ginna Nuclear Power Plant (Ginna), at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, MD. The purpose of the meeting was to discuss the licensee's Diverse and Flexible Coping Strategies (FLEX) for Ginna. Enclosure 1 provides the list of attendees.

The licensee stated that Nuclear Energy Institute (NEI) guidance 12-06 and NRC Order EA-12-049 describe adoption of a phased approach to coping with an Extended Loss of AC Power (ELAP) event. It is assumed that mitigation of the event will transition from installed Ginna plant equipment to on-site (FLEX equipment). Presently, Ginna has some existing equipment on site previously installed to address external events. The licensee is also planning installation of several additional equipments, and provides alternate power configurations for existing installed plant equipment to meet the functional requirements for core cooling, containment cooling, and spent fuel pool cooling. Portions of these modifications incorporate performance requirements to benefit the NPFA*805 project and achieve risk reduction associated with the existing Turbine Driven Auxiliary Feedwater System. The licensee is performing significant enhancements to these modifications to ensure that the equipment is protected from extreme external events and can be credited as a portion of both the Phase 1 and Phase 2 FLEX strategies. The conceptual design includes a combination of installed and connected, installed and isolated, and uninstalled/portable equipment.

The licensee requested the NRC staff's feedback on how it intends to credit the existing installed equipment and the proposed new installed equipment as part of its mitigating strategies. Although the licensee's plans provide a measure of protection above what is required by NEI 12-06, the licensee has determined that its proposed strategy sufficiently deviates from its understanding of how a majority of the industry members intend to address these mitigating strategies to justify seeking the NRC staff's feedback.

The licensee's presentation is publicly available as agency document in Agencywide Document Access and Management System (ADAMS) Accession No. ML13030A386.

-2 The licensee stated that the FLEX portion of the strategy includes a combination of the use of existing equipment, the use of newly installed and isolated equipment, and installation of new battery charger capabilities as discussed below.

1. Use of two existing Standby Auxiliary Feedwater (SBAFW) Pumps with a new installed (and isolated) 1000 kW diesel generator and a new installed 160,000 gallon condensate storage tank, both capable of supplying 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of inventory.

The initial installed equipment mitigation strategy is to supply, by manual operator action within 30 minutes, condensate from the tank to the pump(s) to either steam generator. The FLEX portion of the strategy would be to use dedicated FLEX pumps to refill the condensate tank from Lake OntariO, and continue to supply the steam generators via the SBAFW pumps. Also, a fuel oil tanker truck would be used to resupply the 1000 kW diesel.

2. A new installed (and isolated) charging pump, powered from the diesel generator identified above, taking suction from a dedicated 10,000 gallon borated water tank will be used. This arrangement would include a discharge line routed through a protected portion of the Auxiliary Building to a newly installed charging line connection. The pump would be manually aligned as required. With the installation of low leakage RCP seals, the timeframe to initiate charging is several hours. The FLEX strategy would be to blend boron and condensate to resupply the borated water tank. Another FLEX portion of the strategy is to use a diesel driven portable FLEX charging pump, taking suction from the borated tank or the RWST, connected via high pressure hose, to a flanged connection in the charging system.

3. The licensee will install a manual transfer switch and alternate power connection for the AC input on the battery chargers. The preferred source of power will be the new diesel generator (same as identified in #1 above). Connection using pre identified cables would be performed within the 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> that the existing batteries are available for continued operation. A second source of input to the station battery charger(s) would be a portable 100 kW FLEX diesel generator.

All of the eqUipment described above will be reasonably protected from extreme external natural phenomena. To address the need for tornado protection (Near Term Task Force Tier 3 recommendation), the licensee is using the current licensing basis tornado with a wind speed of 132 mph. The postulated tornado missiles are a steel rod traveling at 60% of the tornado wind speed, and a limited-aerial-height telephone pole traveling at 40% of the tornado wind speed, At the end of the licensee's presentation, the NRC staff commented that the licensee had proposed a good strategy for responding to FLEX requirements as outlined in the NRC Order EA-12-049,

- 3 Please direct any inquiries to me at (301) 415-1476 or email mol1an.thadani@nrc.gov.

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Mohan C. Thadani, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-244

Enclosure:

List of Attendees cc w/encl: Distribution via Listserv

LIST OF MEETING ATTENDEES AND BRIDGE LINE PARTICIPANTS PUBLIC MEETING WITH CONSTELLATION ENERGY NUCLEAR GROUP LLC R. E. GINNA NUCLEAR POWER PLANT JANUARY 29,2013 NAME AFFILIATION Mohan Thadani NRC/NRRlDORLlLPLI-1 Jarred Jackson CENG Edward Groh CENG David Dellario CENT George Wrobel CENG Chuck Merritt CENG Katherine Picciott CENG Jim Brenner CENG Scott Bauer NEI Brian Harris NRR/JLD Milt Murray EP/NSIR/NRC Kevin Williams NRC Harry Barrett NRC/NRR/DRA/AFPB Robert Wolfgang NRC/NRR/DE/EPTB John Klos NRC/NRRlDPR/PGCB Jessica Kratchman NRC/NRR/JLD/PMB Eric Bowman NRRlDPR/PGCB Tim Reed NRR/DPRlPRMB Matthew Mcconnel NRR/DE/EEEB George Wilson NRRlDORLlLPLI*1 Alexander Bucavage NRC Region II Neils Sheehan NRC Region I Clifton L. Buck Plant Vogtle, Severe Accidents Steve Medanic CENG Justin Tyler Huber Bellefonte Completion Project Yuya Aoyagi Toshiba America Nuclear Energy Corp.

Dale Wuokko Toshiba America Nuclear Energy Corp.

Scott Martin Echelon Kristin Harper MPR Associates Inc.

Enclosure

ML13044A089 OFFICE NRRlLPLI*1/PM NRRlLPLI*1/LA JLD/BC NRRlLPLI-1/BC NRRlLPL4/PM NAME MThadani KGoldstein MMitchell GWilson MThadani DATE 2/20113 2/14/13 2/20/13 2/21113 2/21/13