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| issue date = 12/23/2013
| issue date = 12/23/2013
| title = Request for Additional Information Associated with Near-Term Task Force Recommendation 2.3, Flooding Walkdowns
| title = Request for Additional Information Associated with Near-Term Task Force Recommendation 2.3, Flooding Walkdowns
| author name = Pascarelli R J
| author name = Pascarelli R
| author affiliation = NRC/NRR/DORL/LPLII-1
| author affiliation = NRC/NRR/DORL/LPLII-1
| addressee name =  
| addressee name =  
Line 9: Line 9:
| docket = 05000237, 05000249, 05000259, 05000260, 05000275, 05000285, 05000296, 05000298, 05000313, 05000315, 05000316, 05000317, 05000318, 05000321, 05000323, 05000331, 05000334, 05000341, 05000346, 05000366, 05000368, 05000397, 05000412, 05000414, 05000416, 05000445, 05000446, 05000454, 05000455, 05000456, 05000457, 05000461, 05000483
| docket = 05000237, 05000249, 05000259, 05000260, 05000275, 05000285, 05000296, 05000298, 05000313, 05000315, 05000316, 05000317, 05000318, 05000321, 05000323, 05000331, 05000334, 05000341, 05000346, 05000366, 05000368, 05000397, 05000412, 05000414, 05000416, 05000445, 05000446, 05000454, 05000455, 05000456, 05000457, 05000461, 05000483
| license number =  
| license number =  
| contact person = Kuntz R F, NRR/JLD, 415-3733
| contact person = Kuntz R, NRR/JLD, 415-3733
| document type = Letter
| document type = Letter
| page count = 12
| page count = 12
| project =
| stage = RAI
}}
}}


=Text=
=Text=
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 23, 2013 To Those on the Enclosed List  
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 23, 2013 To Those on the Enclosed List


==SUBJECT:==
==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 1 0 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.
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.
Enclosed is a request for additional information (RAI) related to flooding walkdowns.
Based on the walkdown report reviews and site audits, the staff identified additional information necessary to allow the staff to complete its assessments.
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.  
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:==
==Enclosures:==
: 1. Request for Additional Information  
: 1. Request for Additional Information
: 2. Addressee List cc w/encls: Listserv &..J).d( for( /<,'JP Robert J. Pascarelli, Chief Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 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. ML 12053A340) requesting additional information per Title 1 0 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. ML 12172A038).
: 2. Addressee List cc w/encls: Listserv
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)  
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:==
==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  
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


===2.3 report===
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.
submittals.
Request:
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.
Please provide the following:
It is further noted that conclusions regarding "large" values of APM should be based on engineering evaluations or existing design documents.
: 1. Confirmation that the process for evaluating APM was reviewed;
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.
: 2. Confirmation that the APM process is now or was always consistent with the guidance in NEI 12-07 and discussed in this RAI;
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.
: 3. If changes are necessary, a general description of any process changes to establish this consistency;
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.
: 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:
Request: Please provide the following:  
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.
: 1. Confirmation that the process for evaluating APM was reviewed;  
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".
: 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;  
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.
: 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.
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:
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.
* 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.
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.
* Report the APM as "undetermined" and provide the CAP reference in the RAI response.
List of Addressees Arkansas Nuclear One. Units 1 and 2 Docket Nos. 50-313 and 50-368 Vice President, Operations Arkansas Nuclear One Entergy Operations, Inc. 1448 S.R. 333 Russellville, AR 72802 Beaver Valley Power Station. Units 1 and 2 Docket Nos. 50-334 and 50-412 Mr. Eric A. Larson, Site Vice President FirstEnergy Nuclear Operating Company Beaver Valley Power Station Mail Stop A-BV-SEB1 P.O. Box 4, Route 168 Shippingport, PA 15077 Browns Ferry Nuclear Plant. Units 1. 2. and 3 Docket Nos. 50-259. 50-260 and 50-296 Mr. Joseph W. Shea Vice President, Nuclear Licensing Tennessee Valley Authority 1101 Market Street, LP 3D-C Chattanooga, TN 37402-2801 Byron Station. Units 1 and 2/Braidwood Station. Units 1 and 2 Docket Nos. 50-454, 50-455. 50-456. and 50-457 Mr. Michael J. Pacilio, Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Office (CNO) -Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 Callaway Plant, Unit 1 Docket No. 50-483 Mr. Adam C. Heflin Senior Vice President and Chief Nuclear Officer Union Electric Company Ameren Missouri P.O. Box620 Fulton, MO 65251 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Docket Nos. 50-317 and 50-318 Mr. George H. Gellrich, Vice President Calvert Cliffs Nuclear Power Plant, LLC. Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 Catawba Nuclear Station. Units 1 and 2 Docket Nos. 50-413 and 50-414 Mr. Kelvin Henderson, Site Vice President Duke Energy Carolinas, LLC Catawba Nuclear Station, Units 1 & 2 4800 Concord Road York, SC 297 45 Clinton Power Station, Unit No. 1 Docket No. 50-461 Mr. Michael J. Pacilio, Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Office (CNO) Exelon Nuclear 4300 Winfield Rd. Warrenville, IL 60555 Columbia Generating Station Docket No. 50-397 Mr. Mark E. Reddemann, Chief Executive Officer Energy Northwest MD 1023, North Power Plant Loop P.O. Box 968 Richland, WA 99352 Comanche Peak Nuclear Power Plant, Units 1 and 2 Docket Nos. 50-445 and 50-445 Mr. Rafael Flores Senior Vice President
& Chief Nuclear Officer Attention:
Regulatory Affairs Luminant Generation Company LLC P.O. Box 1002 Glen Rose, TX 76043 Enclosure 2
Cooper Nuclear Station Docket No. 50-298 Mr. Oscar A Limpias, Vice President-Nuclear and Chief Nuclear Officer Nebraska Public Power District Cooper Nuclear Station 72676 648A Avenue P.O. Box 98 Brownville, NE 68321 Davis-Besse Nuclear Power Station, Unit 1 Docket No. 50-346 Mr. Ray Lieb, Vice President FirstEnergy Nuclear Operating Company c/o Davis-Besse NPS 5501 N. State Route 2 Oak Harbor, OH 43449-9760 Donald C. Cook Nuclear Plant, Units 1 and 2 Docket Nos. 50-315 and 50-316 Mr. Lawrence J. Weber Senior Vice President and Chief Nuclear Officer Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, Ml 49106 Diablo Canyon Power Plant. Unit Nos. 1 and 2 Docket Nos. 50-275 and 50-323 Mr. Edward D. Halpin, Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company P.O. Box 56 Mail Code 1 04/6 Avila Beach, CA 93424 Dresden Nuclear Power Station, Units 2 and 3 Docket Nos. 50-237 and 50-249 Mr. Michael J. Pacilio, Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Office Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 Duane Arnold Energy Center Docket No. 50-331 Mr. Rich Anderson, Site Vice President Next Era Energy Duane Arnold Energy Center 3277 DAEC Road Palo, lA 52324-9785 Edwin I. Hatch Nuclear Plant Units 1 and 2 Docket Nos. 50-321 and 50-366 Mr. C. R. Pierce, Regulatory Affairs Director Southern Nuclear Operating Co., Inc. P.O. Box 1295 I BIN B038 Birmingham, AL 35201-1295 Fermi. Unit 2 Docket No. 50-341 Mr. Joseph H. Plena, Senior VP and Chief Nuclear Officer Detroit Edison Company Fermi 2-210 NOC 6400 North Dixie Highway Newport, Ml 48166 Fort Calhoun Station, Unit 1 Docket No. 50-285 Mr. Louis Cortopassi, Vice President and Chief Nuclear Officer Omaha Public Power District Fort Calhoun Station Mail Stop FC-2-4 9610 Power Lane Blair, NE 68008 Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 Vice President, Operations Entergy Operations, Inc. Grand Gulf Nuclear Station P.O. Box 756 Port Gibson, MS 39150 H. B. Robinson Steam Electric Plant. Unit No.2 Docket No. 50-261 Mr. William R. Gideon, Vice President H.B. Robinson Steam Electric Plant Duke Energy Progress, Inc. 3581 West Entrance Road Hartsville, SC 29550 Indian Point Nuclear Generating Unit Nos. 2 and 3 Docket Nos. 50-247and 50-286 Vice President, Operations Entergy Nuclear Operations, Inc. Indian Point Energy Center 450 Broadway, GSB P.O. Box 249 Buchanan, NY 10511-0249 James A FitzPatrick Nuclear Power Plant Docket No. 50-333 Mr. Chris Adner, Licensing Manager Entergy Nuclear Operations, Inc. James A FitzPatrick Nuclear Power Plant P.O. Box 110 Lycoming, NY 13093 Joseph M. Farley Nuclear Plant, Units 1 and 2 Docket Nos. 50-348 and 50-364 Mr. C. R. Pierce, Regulatory Affairs Director Southern Nuclear Operating Co., Inc. P.O. Box 1295/ BIN 038 Birmingham, AL 35201-1295 LaSalle County Station. Units 1 and 2 Docket Nos. 50-373 and 50-374 Mr. Michael J. Pacilio, Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Office (CNO) Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 Limerick Generating Station. Units 1 and 2 Docket Nos. 50-352 and 50-353 Mr. Michael J. Pacilio, President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Rd. Warrenville, IL 60555 Monticello Nuclear Generating Plant. Unit 1 Docket No. 50-263 Ms. Karen D. Fili, Site Vice President Northern States Power Company -Minnesota Monticello Nuclear Generating Plant 2807 West County Road 75 Monticello, MN 55362-9637 Nine Mile Point Nuclear Station, Units 1 and 2 Docket Nos. 50-220 and 50-410 Mr. Christopher Costanzo, Vice President Nine Mile Point Nuclear Station LLC P. 0. Box 63 ' Lycoming, NY 13093 North Anna Power Station, Units 1 and 2 Docket Nos. 50-338 and 50-339 Mr. David A Heacock, President and Chief Nuclear Officer Virginia Electric & Power Company lnnsbrook Technical Center 5000 Dominion Blvd. Glen Allen, VA 23060 Oconee Nuclear Station. Units 1, 2 and 3 Docket Nos. 50-236, 50-270 and 50-287 Mr. Scott Batson Vice President, Oconee Nuclear Station Duke Energy Carolinas, LLC 7800 Rochester Highway Seneca, SC 29672 Palisades Nuclear Plant Docket No. 50-355 Mr. Anthony J. Vitale, Vice President, Operations Entergy Nuclear Operations, Inc. Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, Ml 49043-9530 Palo Verde Nuclear Generating Station, Units 1, 2, and 3 Docket Nos. 50-528, 50-529 and 50-530 Mr. Randall K. Edington Executive Vice President Nuclear/CNO Arizona Public Service Company P.O. Box 52034, MS 7602 Phoenix, AZ 85072-2034 Peach Bottom Atomic Power Station, Units 2 and 3 Docket Nos. 50-277 and 50-278 Mr. Michael J. Pacilio, President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 Perry Nuclear Power Plant. Unit 1 Docket No. 50-440 Mr. Ernest J. Harkness, President and Chief Nuclear Officer FirstEnergy Nuclear Operating Company Perry Nuclear Power Plant 10 Center Road, A290 Perry, OH 44081 Pilgrim Nuclear Power Station Unit No. 1 Docket No. 50-293 Mr. John Dent, Jr., Vice President-Site VP Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360-5508  Point Beach Nuclear Plant. Units 1 and 2 Docket Nos. 50-266 and 50-301 Mr. Larry Meyer, Site Vice President NextEra Energy Point Beach, LLC Point Beach Nuclear Plant, Units 1 & 2 6610 Nuclear Road Two Rivers, WI 54241-9516 Prairie Island Nuclear Generating Plant, Units 1 and 2 Docket Nos. 50-282 and 50-306 Mr. James E. Lynch, Site Vice President Northern States Power Company -Minnesota Prairie Island Nuclear Generating Plant 1717 Wakonade Drive East Welch, MN 55089-9642 R. E. Ginna Nuclear Power Plant Docket No. 50-244 Mr. Joseph E. Pacher, Vice President R.E. Ginna Nuclear Power Plant R.E. Ginna Nuclear Power Plant, LLC 1503 Lake Road Ontario, NY 14519 River Bend Station. Unit 1 Docket No. 50-458 Vice President, Operations Entergy Operations, Inc. River Bend Station 5485 U.S. Highway 61 N St. Francisville, LA 70775 Seabrook Station, Unit No. 1 Docket No. 50-443 Mr. Kevin Walsh, Site Vice President c/o Michael Ossing Seabrook Station NextEra Energy Seabrook, LLC P.O Box 300 Seabrook, NH 03874 Sequoyah Nuclear Plant. Units 1 and 2 Docket Nos. 50-327 and 50-328 Mr. Joseph W. Shea Vice President, Corporate Nuclear Licensing Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37 402-2801 Shearon Harris Nuclear Power Plant. Unit 1 Docket No. 50-400 Mr. Ernest J. Kapopoulos, Jr., Vice President Duke Energy Progress, Inc. Shearon Harris Nuclear Power Plant P.O. Box 165, Mail Zone 1 New Hill, NC 27562-0165 South Texas Project, Units 1 and 2 Docket Nos. 50-498 and 50-499 Mr. Dennis L. Koehl, President and CEO/CNO STP Nuclear Operating Company South Texas Project Electric Generating Station P.O. Box 289 Wadsworth, TX 77483 St. Lucie Plant Units 1 and 2 Docket Nos. 50-335 and 50-289 Mr. Mano Nazar, Executive VP and Chief Nuclear Officer NextEra Energy P. 0. Box 14000 700 Universe Boulevard Juno Beach, FL 33408-0420 Surry Power Station. Unit Nos. 1 and 2 Docket Nos. 50-280 and 50-281 Mr. David A Heacock, President
& Chief Nuclear Officer Virginia Electric & Power Company 5000 Dominion Blvd. Glen Allen, VA 23060 Susquehanna Steam Electric Station. Units 1 and 2 Docket Nos. 50-387 and 50-388 Mr. Timothy S. Rausch, Senior Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Boulevard NUCSB3 Berwick, PA 18603-0467 Three Mile Island Nuclear Station. Unit 1 Docket No. 50-289 Mr. Michael J. Pacilio, President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Mr. Mano Nazar, Executive VP and Chief Nuclear Officer NextEra Energy P. 0. Box 14000 Juno Beach, FL 33408-0420 Virgil C. Summer Nuclear Station. Unit 1 Docket No. 50-395 Mr. Thomas D. Gatlin, Vice President Nuclear Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station Post Office Box 88, Mail Code 800 Jenkinsville, SC 29065 Vogtle Electric Generating Plant. Units 1 and 2 Docket Nos. 50-424 and 50-425 Mr. C. R. Pierce, Regulatory Affairs Director Southern Nuclear Operating Co., Inc. P.O. Box 1295/ BIN 038 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 37 402-2801 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 December 23, 2013 To Those on the Enclosed List


==SUBJECT:==
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.
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 1 0 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 staffs 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.
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.
Enclosed is a request for additional information (RAI) related to flooding walkdowns.
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
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.  
 
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


==Enclosures:==
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


Sincerely, Ira/ (G. E. Miller for) Robert J. Pascarelli, Chief Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
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)
: 1. Request for Additional Information
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
: 2. Addressee List cc w/encls: Listserv DISTRIBUTION:
See next page ADAMS Accession No. ML 13325A891
*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 OFFICIAL RECORD COPY Letter to Selected Power Reactor Licensees from Robert J. Pascarelli dated December 23, 2013  


==SUBJECT:==
==SUBJECT:==
REQUEST FOR ADDITIONAL INFORMATION ASSOCIATED WITH NEAR-TERM TASK FORCE RECOMMENDATION 2.3, FLOODING WALKDOWNS DISTRIBUTION:
REQUEST FOR ADDITIONAL INFORMATION ASSOCIATED WITH NEAR-TERM TASK FORCE RECOMMENDATION 2.3, FLOODING WALKDOWNS DISTRIBUTION:
PUBLIC RidsNrrDorl RidsNrrDoriLpl1-1 RidsNrrDoriLpl1-2 RidsNrrDoriLpl2-1 RidsNrrDoriLpl2-2 RidsNrrDoriLpl3-1 RidsNrrDoriLpl3-2 RidsNrrDoriLpl4-1 RidsNrrDoriLpl4-2 RidsNrrOd RidsOeMaiiCenter RidsNrrPMANO RidsNrrPMBeaverValley RidsNrrPMBraidwood RidsNrrPMBrownsFerry RidsNrrPMByron RidsNrrPMCallaway RidsNrrPMCalvertCiiffs RidsNrrPMCatawba RidsNrrPMCiinton RidsNrrPMColumbia  
PUBLIC                                         RidsNrrPMHatch RidsNrrDorl                                     RidsNrrPMindianPoint RidsNrrDoriLpl1-1                               RidsNrrPMLaSalle RidsNrrDoriLpl1-2                               RidsNrrPMLimerick RidsNrrDoriLpl2-1                               RidsNrrPMMcGuire RidsNrrDoriLpl2-2                               RidsNrrPMMonticello RidsNrrDoriLpl3-1                               RidsNrrPMNineMilePoint RidsNrrDoriLpl3-2                               RidsNrrPMNorthAnna RidsNrrDoriLpl4-1                               RidsNrrPMOconee RidsNrrDoriLpl4-2                               RidsNrrPMPalisades RidsNrrOd                                       RidsNrrPMPaloVerde RidsOeMaiiCenter                               RidsNrrPMPeachBottom RidsNrrPMANO                                   RidsNrrPMPerry RidsNrrPMBeaverValley                           RidsNrrPMPilgrim RidsNrrPMBraidwood                             RidsNrrPMPointBeach RidsNrrPMBrownsFerry                           RidsNrrPMPrairielsland RidsNrrPMByron                                 RidsNrrPMREGinna RidsNrrPMCallaway                               RidsNrrPMRiverBend RidsNrrPMCalvertCiiffs                         RidsNrrPMRobinson RidsNrrPMCatawba                               RidsNrrPMSeabrook RidsNrrPMCiinton                               RidsNrrPMSequoyah RidsNrrPMColumbia                               RidsNrrPMShearonHarris RidsNrrPMComanchePeak                           RidsNrrPMSouthTexas RidsNrrPMCooper                                 RidsNrrPMStLucie RidsNrrPMDavisBesse                             RidsNrrPMSummer RidsNrrPMDCCook                                 RidsNrrPMSurry RidsNrrPMDiabloCanyon                           RidsNrrPMSusquehanna RidsNrrPMDresden                               RidsNrrPMThreeMilelsland RidsNrrPMDuaneArnold                           RidsNrrPMTurkeyPoint RidsNrrPMFarley                                 RidsNrrPMVogtle RidsNrrPMFermi2                                 RidsNrrPMWaterford RidsNrrPMFitzPatrick                           RidsNrrPMWattsBar1 RidsNrrPMFortCalhoun                           RidsNrrPMWolfCreek RidsNrrPMGrandGulf}}
 
RidsNrrPMComanchePeak RidsNrrPMCooper RidsNrrPMDavisBesse RidsNrrPMDCCook RidsNrrPMDiabloCanyon RidsNrrPMDresden  
 
RidsNrrPMDuaneArnold RidsNrrPMFarley RidsNrrPMFermi2 RidsNrrPMFitzPatrick RidsNrrPMFortCalhoun RidsNrrPMGrandGulf RidsNrrPMHatch RidsNrrPMindianPoint RidsNrrPMLaSalle RidsNrrPMLimerick RidsNrrPMMcGuire RidsNrrPMMonticello RidsNrrPMNineMilePoint RidsNrrPMNorthAnna RidsNrrPMOconee RidsNrrPMPalisades RidsNrrPMPaloVerde RidsNrrPMPeachBottom RidsNrrPMPerry RidsNrrPMPilgrim RidsNrrPMPointBeach RidsNrrPMPrairielsland RidsNrrPMREGinna RidsNrrPMRiverBend RidsNrrPMRobinson RidsNrrPMSeabrook RidsNrrPMSequoyah RidsNrrPMShearonHarris RidsNrrPMSouthTexas RidsNrrPMStLucie RidsNrrPMSummer RidsNrrPMSurry RidsNrrPMSusquehanna RidsNrrPMThreeMilelsland RidsNrrPMTurkeyPoint RidsNrrPMVogtle RidsNrrPMWaterford RidsNrrPMWattsBar1 RidsNrrPMWolfCreek}}

Latest revision as of 01:02, 6 February 2020

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  Constellation icon.png
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)
v • d • e


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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