ML13325A891

Request for Additional Information Associated with Near-Term Task Force Recommendation 2.3, Flooding Walkdowns

ML13325A891
Person / Time
Site:	Beaver Valley, Hatch, Calvert Cliffs, Dresden, Davis Besse, Browns Ferry, Fermi, Catawba, Grand Gulf, Cooper, Byron, Arkansas Nuclear, Braidwood, Columbia, Diablo Canyon, Callaway, Duane Arnold, Clinton, Cook, Comanche Peak, Fort Calhoun
Issue date:	12/23/2013
From:	Robert Pascarelli Plant Licensing Branch II
To:	Calvert Cliffs, Detroit Edison, Co, Duke Energy Carolinas, Energy Northwest, Entergy Operations, Exelon Generation Co, FirstEnergy Nuclear Operating Co, Indiana Michigan Power Co, Luminant Generation Co, Nebraska Public Power District (NPPD), NextEra Energy Duane Arnold, Omaha Public Power District, Pacific Gas & Electric Co, Southern Nuclear Operating Co, Tennessee Valley Authority, Union Electric Co
Kuntz R, NRR/JLD, 415-3733
References
Download: ML13325A891 (12)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 23, 2013 To Those on the Enclosed List

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ASSOCIATED WITH NEAR-TERM TASK FORCE RECOMMENDATION 2.3, FLOODING WALKDOWNS On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) staff issued a letter requesting additional information per Title 10 of the Code of Federal Regulations, Section 50.54(f) (hereafter called the 50.54(f) letter). The 50.54(f) letter requested that licensees conduct flooding hazard walkdowns to verify the plant configuration with the current licensing basis. The licensees stated by letter that the flooding walkdowns would be performed in accordance with Nuclear Energy Institute 12-07, "Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features," May 2012. Following the NRC staff's initial review of the walkdown reports, regulatory site audits were conducted at a sampling of plants.

Based on the walkdown report reviews and site audits, the staff identified additional information necessary to allow the staff to complete its assessments.

Enclosed is a request for additional information (RAI) related to flooding walkdowns. The NRC staff requests that you respond no later than January 31, 2014. If you have any questions related to the enclosed RAI or the requested submission date, please contact your assigned plant Project Manager.

&..J).d( for( /<,'JP Robert J. Pascarelli, Chief Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Enclosures:

1. Request for Additional Information

2. Addressee List cc w/encls: Listserv

REQUEST FOR ADDITIONAL INFORMATION Flooding Walkdowns On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) staff issued a letter (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340) requesting additional information per Title 10 of the Code of Federal Regulations, Section 50.54(f) (hereafter called the 50.54(f) letter). The 50.54(f) letter requested that licensees conduct flooding hazard walkdowns to identify and address plant-specific degraded, nonconforming, or unanalyzed conditions through the corrective action program (CAP). All licensees stated by letter that the flooding walkdowns would be performed in accordance with Nuclear Energy Institute (NEI) 12-07, "Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features," May 2012 (ADAMS Accession No. ML12172A038). Following the NRC staff's initial review of the reports documenting the results of the licensees' walkdowns, regulatory site audits were conducted at a sample of plants.

Based on the walkdown report reviews and site audits, the staff identified additional information necessary to allow the staff to complete its assessments.

Determination and documentation of available physical margin (APM)

Background:

The NRC staff observed that several licensees did not consistently determine and/or document available physical margin (APM) in a manner that met the expected interpretation of NEI 12-07 during audits associated with review of the NTTF Recommendation 2.3 report submittals. APM is defined in section 3.13 of NEI 12-07 and the process for obtaining and evaluating APM values is described in section 5.8 of NEI 12-07. Consistent with NEI 12-07, a numerical value for APM should be determined and documented for every applicable flood protection feature (e.g., wall, penetration, berm, door, etc.). This would normally be a numerical value reflecting the difference between the licensing basis flood height at the location of the feature and the point at which the function of the flood protection feature is compromised (e.g., the top of a barrier or the height of the first unsealed penetration in a barrier) such that the resulting flood can affect a structures, systems, and components important to safety. Next, in accordance with Section 5.8 of NEI12-07, if the APM appears to be small and the consequences of flooding appear to be significant, the licensee should enter the condition into the CAP and appropriate action be taken. While NEI 12-07 does not require that a specific numerical threshold value for "small" APM be defined for each site, doing so establishes a consistent basis for determining what instances need to be entered into the CAP. If a numerical APM value cannot be determined for any flood protection feature, the licensee should perform an assessment of the ability of the barrier to withstand the licensing basis flood plus the contribution of the additional water corresponding to the pre-established small-margin threshold value. If the barrier can withstand this flood, the APM for the feature is "not small" and further evaluation in accordance with Section 5.8 of NEI 12-07 is not required. It is further noted that conclusions regarding "large" values of APM should be based on engineering evaluations or existing design documents.

Licensees should ensure that the process for APM determination and evaluation used during their flooding walkdowns is consistent with the guidance in NEI 12-07. The intent of this RAI is not to repeat the flooding walkdowns or perform an extensive revision of the walkdown record Enclosure 1

forms and other paperwork. Instead the purpose is to verify or modify the process used to determine APM such that every site is aware of the margin at each of its flood protection features and take appropriate interim actions when the APM is small and the consequences are significant. Instances where numerical values for APM were not determined, or where the basis for the APM was found to be questionable, should be rectified by either the documentation of a specific value or an explanation of why a non-numerical value is appropriate.

Request:

Please provide the following:

1. Confirmation that the process for evaluating APM was reviewed;

2. Confirmation that the APM process is now or was always consistent with the guidance in NEI 12-07 and discussed in this RAI;

3. If changes are necessary, a general description of any process changes to establish this consistency;

4. As a result of the audits and subsequent interactions with industry during public meetings, NRC staff recognized that evaluation of APM for seals (e.g., flood doors, penetrations, flood gates, etc.) was challenging for some licensees. Generally, licensees were expected to use either Approach A or Approach B (described below) to determine the APM for seals:

a) If seal pressure ratings were known, the seal ratings were used to determine APM (similar to example 2 in Section 3.13 of NEI 12-07). A numerical value for APM was documented. No further action was performed if the APM value was greater than the pre-established small-margin threshold value. If the APM value was small, an assessment of "significant consequences" was performed and the guidance in NEI 12-07 Section 5.8 was followed.

b) If the seal pressure rating was not known, the APM for seals in a flood barrier is assumed to be greater than the pre-established small-margin threshold value if the following conditions were met: (1) the APM for the barrier in which the seal is located is greater than the small-margin threshold value and there is evidence that the seals were designed/procured, installed, and controlled as flooding seals in accordance with the flooding licensing basis. Note that in order to determine that the seal has been controlled as a flooding seal, it was only necessary to determine that the seal configuration has been governed by the plant's design control process since installation. In this case, the APM for the seal could have been documented as "not small".

As part of the RAI response, state if either Approach A or Approach B was used as part of the initial walkdowns or as part of actions taken in response to this RAI. No additional actions are necessary if either Approach A orB was used.

If neither Approach A orB was used to determine the APM values for seals (either as part of the walkdowns or as part of actions taken in response to this RAI), then perform the following two actions:

• Enter the condition into the CAP (note: it is acceptable to utilize a single CAP entry to capture this issue for multiple seals). CAP disposition of "undetermined" APM values for seals should consider the guidance provided in NEI 12-07, Section 5.8. The CAP disposition should confirm all seals can perform their intended safety function against floods up to the current licensing basis flood height. Disposition may occur as part of the Integrated Assessment. If an Integrated Assessment is not performed, determine whether there are significant consequences associated with exceeding the capacity of the seals and take interim action(s), if necessary, via the CAP processes. These actions do not need to be complete prior to the the RAI response.

• Report the APM as "undetermined" and provide the CAP reference in the RAI response.

List of Addressees Arkansas Nuclear One. Units 1 and 2 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Docket Nos. 50-313 and 50-368 Docket Nos. 50-317 and 50-318 Vice President, Operations Mr. George H. Gellrich, Vice President Arkansas Nuclear One Calvert Cliffs Nuclear Power Plant, LLC.

Entergy Operations, Inc. Calvert Cliffs Nuclear Power Plant 1448 S.R. 333 1650 Calvert Cliffs Parkway Russellville, AR 72802 Lusby, MD 20657-4702 Beaver Valley Power Station. Units 1 and 2 Catawba Nuclear Station. Units 1 and 2 Docket Nos. 50-334 and 50-412 Docket Nos. 50-413 and 50-414 Mr. Eric A. Larson, Site Vice President Mr. Kelvin Henderson, Site Vice President FirstEnergy Nuclear Operating Company Duke Energy Carolinas, LLC Beaver Valley Power Station Catawba Nuclear Station, Units 1 & 2 Mail Stop A-BV-SEB1 4800 Concord Road P.O. Box 4, Route 168 York, SC 29745 Shippingport, PA 15077 Clinton Power Station, Unit No. 1 Browns Ferry Nuclear Plant. Units 1. 2. and 3 Docket No. 50-461 Docket Nos. 50-259. 50-260 and 50-296 Mr. Michael J. Pacilio, Senior Vice President Mr. Joseph W. Shea Exelon Generation Company, LLC Vice President, Nuclear Licensing President and Chief Nuclear Office (CNO) Exelon Tennessee Valley Authority Nuclear 1101 Market Street, LP 3D-C 4300 Winfield Rd.

Chattanooga, TN 37402-2801 Warrenville, IL 60555 Byron Station. Units 1 and 2/Braidwood Station. Columbia Generating Station Units 1 and 2 Docket No. 50-397 Docket Nos. 50-454, 50-455. 50-456. and 50-457 Mr. Mark E. Reddemann, Chief Executive Officer Mr. Michael J. Pacilio, Senior Vice President Energy Northwest Exelon Generation Company, LLC MD 1023, North Power Plant Loop President and Chief Nuclear Office (CNO) - Exelon P.O. Box 968 Nuclear Richland, WA 99352 4300 Winfield Road Warrenville, IL 60555 Comanche Peak Nuclear Power Plant, Units 1 and 2 Docket Nos. 50-445 and 50-445 Callaway Plant, Unit 1 Docket No. 50-483 Mr. Rafael Flores Senior Vice President & Chief Nuclear Officer Mr. Adam C. Heflin Attention: Regulatory Affairs Senior Vice President and Chief Nuclear Officer Luminant Generation Company LLC Union Electric Company P.O. Box 1002 Ameren Missouri Glen Rose, TX 76043 P.O. Box620 Fulton, MO 65251 Enclosure 2

Cooper Nuclear Station Duane Arnold Energy Center Docket No. 50-298 Docket No. 50-331 Mr. Oscar A Limpias, Vice President-Nuclear and Mr. Rich Anderson, Site Vice President Chief Nuclear Officer Next Era Energy Nebraska Public Power District Duane Arnold Energy Center Cooper Nuclear Station 3277 DAEC Road 72676 648A Avenue Palo, lA 52324-9785 P.O. Box 98 Brownville, NE 68321 Edwin I. Hatch Nuclear Plant Units 1 and 2 Docket Nos. 50-321 and 50-366 Davis-Besse Nuclear Power Station, Unit 1 Docket No. 50-346 Mr. C. R. Pierce, Regulatory Affairs Director Southern Nuclear Operating Co., Inc.

Mr. Ray Lieb, Vice President P.O. Box 1295 I BIN B038 FirstEnergy Nuclear Operating Company Birmingham, AL 35201-1295 c/o Davis-Besse NPS 5501 N. State Route 2 Oak Harbor, OH 43449-9760 Fermi. Unit 2 Donald C. Cook Nuclear Plant, Units 1 and 2 Docket No. 50-341 Docket Nos. 50-315 and 50-316 Mr. Joseph H. Plena, Senior VP and Chief Nuclear Mr. Lawrence J. Weber Officer Senior Vice President and Chief Nuclear Officer Detroit Edison Company Indiana Michigan Power Company Fermi 2-210 NOC Nuclear Generation Group 6400 North Dixie Highway One Cook Place Newport, Ml 48166 Bridgman, Ml 49106 Fort Calhoun Station, Unit 1 Diablo Canyon Power Plant. Unit Nos. 1 and 2 Docket No. 50-285 Docket Nos. 50-275 and 50-323 Mr. Louis Cortopassi, Vice President and Chief Mr. Edward D. Halpin, Senior Vice President and Nuclear Officer Chief Nuclear Officer Omaha Public Power District Pacific Gas and Electric Company Fort Calhoun Station P.O. Box 56 Mail Stop FC-2-4 Mail Code 104/6 9610 Power Lane Avila Beach, CA 93424 Blair, NE 68008 Dresden Nuclear Power Station, Units 2 and 3 Grand Gulf Nuclear Station, Unit 1 Docket Nos. 50-237 and 50-249 Docket No. 50-416 Mr. Michael J. Pacilio, Senior Vice President Vice President, Operations Exelon Generation Company, LLC Entergy Operations, Inc.

President and Chief Nuclear Office Exelon Nuclear Grand Gulf Nuclear Station 4300 Winfield Road P.O. Box 756 Warrenville, IL 60555 Port Gibson, MS 39150

H. B. Robinson Steam Electric Plant. Unit No.2 Limerick Generating Station. Units 1 and 2 Docket No. 50-261 Docket Nos. 50-352 and 50-353 Mr. William R. Gideon, Vice President Mr. Michael J. Pacilio, President and Chief Nuclear H.B. Robinson Steam Electric Plant Officer Duke Energy Progress, Inc. Exelon Nuclear 3581 West Entrance Road 4300 Winfield Rd.

Hartsville, SC 29550 Warrenville, IL 60555 Monticello Nuclear Generating Plant. Unit 1 Indian Point Nuclear Generating Unit Nos. 2 and 3 Docket No. 50-263 Docket Nos. 50-247and 50-286 Ms. Karen D. Fili, Site Vice President Vice President, Operations Northern States Power Company - Minnesota Entergy Nuclear Operations, Inc. Monticello Nuclear Generating Plant Indian Point Energy Center 2807 West County Road 75 450 Broadway, GSB Monticello, MN 55362-9637 P.O. Box 249 Buchanan, NY 10511-0249 Nine Mile Point Nuclear Station, Units 1 and 2 Docket Nos. 50-220 and 50-410 James A FitzPatrick Nuclear Power Plant Docket No. 50-333 Mr. Christopher Costanzo, Vice President Nine Mile Point Nuclear Station LLC Mr. Chris Adner, Licensing Manager P. 0. Box 63 '

Entergy Nuclear Operations, Inc.

Lycoming, NY 13093 James A FitzPatrick Nuclear Power Plant P.O. Box 110 North Anna Power Station, Units 1 and 2 Lycoming, NY 13093 Docket Nos. 50-338 and 50-339 Joseph M. Farley Nuclear Plant, Units 1 and 2 Mr. David A Heacock, President and Chief Nuclear Docket Nos. 50-348 and 50-364 Officer Virginia Electric & Power Company Mr. C. R. Pierce, Regulatory Affairs Director lnnsbrook Technical Center Southern Nuclear Operating Co., Inc.

5000 Dominion Blvd.

P.O. Box 1295/ BIN 038 Glen Allen, VA 23060 Birmingham, AL 35201-1295 Oconee Nuclear Station. Units 1, 2 and 3 Docket Nos. 50-236, 50-270 and 50-287 LaSalle County Station. Units 1 and 2 Docket Nos. 50-373 and 50-374 Mr. Scott Batson Vice President, Oconee Nuclear Station Mr. Michael J. Pacilio, Senior Vice President Duke Energy Carolinas, LLC Exelon Generation Company, LLC 7800 Rochester Highway President and Chief Nuclear Office (CNO) Exelon Seneca, SC 29672 Nuclear 4300 Winfield Road Warrenville, IL 60555

Palisades Nuclear Plant Point Beach Nuclear Plant. Units 1 and 2 Docket No. 50-355 Docket Nos. 50-266 and 50-301 Mr. Anthony J. Vitale, Vice President, Operations Mr. Larry Meyer, Site Vice President Entergy Nuclear Operations, Inc. NextEra Energy Point Beach, LLC Palisades Nuclear Plant Point Beach Nuclear Plant, Units 1 & 2 27780 Blue Star Memorial Highway 6610 Nuclear Road Covert, Ml 49043-9530 Two Rivers, WI 54241-9516 Palo Verde Nuclear Generating Station, Units 1, 2, Prairie Island Nuclear Generating Plant, and 3 Units 1 and 2 Docket Nos. 50-528, 50-529 and 50-530 Docket Nos. 50-282 and 50-306 Mr. Randall K. Edington Mr. James E. Lynch, Site Vice President Executive Vice President Nuclear/CNO Northern States Power Company - Minnesota Arizona Public Service Company Prairie Island Nuclear Generating Plant P.O. Box 52034, MS 7602 1717 Wakonade Drive East Phoenix, AZ 85072-2034 Welch, MN 55089-9642 Peach Bottom Atomic Power Station, Units 2 and 3 R. E. Ginna Nuclear Power Plant Docket Nos. 50-277 and 50-278 Docket No. 50-244 Mr. Michael J. Pacilio, President and Chief Nuclear Mr. Joseph E. Pacher, Vice President Officer R.E. Ginna Nuclear Power Plant Exelon Nuclear R.E. Ginna Nuclear Power Plant, LLC 4300 Winfield Road 1503 Lake Road Warrenville, IL 60555 Ontario, NY 14519 Perry Nuclear Power Plant. Unit 1 River Bend Station. Unit 1 Docket No. 50-440 Docket No. 50-458 Mr. Ernest J. Harkness, President and Chief Vice President, Operations Nuclear Officer Entergy Operations, Inc.

FirstEnergy Nuclear Operating Company River Bend Station Perry Nuclear Power Plant 5485 U.S. Highway 61 N 10 Center Road, A290 St. Francisville, LA 70775 Perry, OH 44081 Pilgrim Nuclear Power Station Unit No. 1 Seabrook Station, Unit No. 1 Docket No. 50-293 Docket No. 50-443 Mr. John Dent, Jr., Vice President- Site VP Mr. Kevin Walsh, Site Vice President Pilgrim Nuclear Power Station c/o Michael Ossing 600 Rocky Hill Road Seabrook Station Plymouth, MA 02360-5508 NextEra Energy Seabrook, LLC P.O Box 300 Seabrook, NH 03874

Sequoyah Nuclear Plant. Units 1 and 2 Susquehanna Steam Electric Station. Units 1 and 2 Docket Nos. 50-327 and 50-328 Docket Nos. 50-387 and 50-388 Mr. Joseph W. Shea Mr. Timothy S. Rausch, Senior Vice President and Vice President, Corporate Nuclear Licensing Chief Nuclear Officer Tennessee Valley Authority PPL Susquehanna, LLC 3R Lookout Place 769 Salem Boulevard 1101 Market Street NUCSB3 Chattanooga, TN 37402-2801 Berwick, PA 18603-0467 Shearon Harris Nuclear Power Plant. Unit 1 Three Mile Island Nuclear Station. Unit 1 Docket No. 50-400 Docket No. 50-289 Mr. Ernest J. Kapopoulos, Jr., Vice President Mr. Michael J. Pacilio, President and Chief Nuclear Duke Energy Progress, Inc. Officer Shearon Harris Nuclear Power Plant Exelon Nuclear P.O. Box 165, Mail Zone 1 4300 Winfield Road New Hill, NC 27562-0165 Warrenville, IL 60555 South Texas Project, Units 1 and 2 Docket Nos. 50-498 and 50-499 Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Mr. Dennis L. Koehl, President and CEO/CNO STP Nuclear Operating Company Mr. Mano Nazar, Executive VP and Chief Nuclear South Texas Project Electric Generating Station Officer P.O. Box 289 NextEra Energy Wadsworth, TX 77483 P. 0. Box 14000 Juno Beach, FL 33408-0420 St. Lucie Plant Units 1 and 2 Docket Nos. 50-335 and 50-289 Virgil C. Summer Nuclear Station. Unit 1 Docket No. 50-395 Mr. Mano Nazar, Executive VP and Chief Nuclear Officer Mr. Thomas D. Gatlin, Vice President NextEra Energy Nuclear Operations P. 0. Box 14000 South Carolina Electric & Gas Company 700 Universe Boulevard Virgil C. Summer Nuclear Station Juno Beach, FL 33408-0420 Post Office Box 88, Mail Code 800 Jenkinsville, SC 29065 Surry Power Station. Unit Nos. 1 and 2 Docket Nos. 50-280 and 50-281 Vogtle Electric Generating Plant. Units 1 and 2 Docket Nos. 50-424 and 50-425 Mr. David A Heacock, President & Chief Nuclear Officer Mr. C. R. Pierce, Regulatory Affairs Director Virginia Electric & Power Company Southern Nuclear Operating Co., Inc.

5000 Dominion Blvd. P.O. Box 1295/ BIN 038 Glen Allen, VA 23060 Birmingham, AL 35201-1295

Waterford Steam Electric Station. Unit 3 Docket No. 50-382 Vice President, Operations Entergy Operations, Inc.

Waterford Steam Electric Station, Unit 3 17265 River Road Killona, LA 70057-0751 Watts Bar Nuclear Plant. Unit 1 Docket No. 50-390 Mr. Joseph W. Shea, Corporate Manager, Nuclear Licensing Tennessee Valley Authority 1101 Market Street, LP 3D-C Chattanooga, TN 37402-2801 William B. McGuire Nuclear Station. Units 1 and 2 Docket Nos. 50-369 and 50-370 Mr. Steven D. Capps, Vice President McGuire Site Duke Energy Carolinas, LLC McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, NC 28078-8985 Wolf Creek Generating Station. Unit 1 Docket No. 50-482 Mr. Matthew W. Sunseri President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation P.O. Box411 Burlington, KS 66839

ML13325A891 *via e-mail OFFICE NRR/JLD/PMB NRR/DORULPL4-1/LA NRO/DSEA/RHMB/BC NAME RKuntz JBurkhardt SFianders" DATE 11/22/13 11/22/13 12/19/13 OFFICE NRR/JLD/PMB/BC NRR/DORULPLII-1/BC (GMiller for)

NAME LMR for MMitchell RPascarelli DATE 12/23113 12/23/13 Letter to Selected Power Reactor Licensees from Robert J. Pascarelli dated December 23, 2013

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ASSOCIATED WITH NEAR-TERM TASK FORCE RECOMMENDATION 2.3, FLOODING WALKDOWNS DISTRIBUTION:

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