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{{Adams
#REDIRECT [[RBG-47634, High-frequency Supplement to Seismic Hazard Screening Report, Response NRC Request for Information Pursuant to 10CER50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi..]]
| number = ML16005A088
| issue date = 12/08/2015
| title = River Bend, Unit 1 - High-frequency Supplement to Seismic Hazard Screening Report, Response NRC Request for Information Pursuant to 10CER50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima
| author name = Vazquez S
| author affiliation = Entergy Operations, Inc
| addressee name =
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000458
| license number = NPF-047
| contact person =
| case reference number = RBG-47634
| document type = Letter, Response to Request for Additional Information (RAI)
| page count = 4
| project =
| stage = RAI
}}
 
=Text=
{{#Wiki_filter:' EnteigyEntergy Operations, Inc.River Bend Station5485 U.S. Highway 61 NSt. Francisville, LA 70775December 8, 2015RBG-47634 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk11555 Rockville PikeRockville, MD 20852
 
==Subject:==
 
==References:==
 
High-frequency SUpplement to Seismic Hazard Screening Report, Response NRCRequest for Information Pursuant to 10 CER 50.54(f)
Regarding Recommendation 2.1 ofthe Near-Term Task Force Review of Insights from the Fukushima Dai-ichi AccidentRiver Bend Station -Unit 1Docket No. 50-458License No. NPF-471. NRC Letter, Request for Information Pursuant to Title 10 of the Code of FederalRegulations 50.54(f)
Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi
: Accident, dated March 12,"20112, ADAMS Accession Number M/L12053A340
*2.: NRC Letter, Electric Power *Research Institute Report 3002000704, "SeismicEvaluation GuidanCe:
Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic,"
as an Acceptable Alternative to the March12, 2012, Information Request for Seismic Reevaluations, dated May 7, 2013, ADAMSAccession Number ML 131 06A3313. NEI Letter, Final Draft of Industry Seismic Evaluation Guidance (EPRI 1025287),
dated November 27, 2012, ADAMS Accession Number ML12333A168 andML1 2333A1 704. NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report1025287, "Seismic Evaluation Guidance",
dated February 15, 2013, ADAMS Accession Number ML1 231 9A0745. Entergy letter dated March 26, 2014, Seismic Hazard Reevaluations and Screening Report (ML 14091A429)
: 6. NRC Letter, Screening and Prioritization Results regarding information pursuant toTitle 10 of the Code of Federal Regulations 50.54(f) regarding Seismic HazardReevaluations for Recommendation 2.1 of the Near-Term Task Force Reviews ofInsights from the Fukushima Dai-ichi
: accident, dated May 9, 2014, (ML14111A147)
: 7. NEI Letter, Request for NRC Endorsement of High Frequency Program:
Application Guidance for Functional Confirmation and Fragility Evaluation (EPRI 3002004396),
datedJuly 30, 20158. NRC letter dated September 15, 2015, Endorsement of Electric Power ResearchInstitute Final Draft Report 3002004396, "High Frequency Program:
Application GuidanceFor Functional Confirmation And Fragility"'
(ML1 521 8A569) / p RBG-47634 December 8, 2015Page 2 of 3
 
==Dear Sir or Madam:==
On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a Request for Information per 10CFR 50.54(f)
(Reference
: 1) to all power reactor licensees.
The required response section of Enclosure 1indicated that licensees should provide a seismic hazard evaluation and screening report within 1 .5 yearsfrom the date of the letter for central and eastern United States (CEUS) nuclear power plants. By NRCletter dated May 7, 2013 (Reference 2), the date to submit the report was extended to March 31, 2014.By letter dated May 9, 2014 (Reference 6), the NRC transmitted the results of the screening andprioritization review of the seismic hazards reevaluation submittal for River Bend Station (RBS)(Reference 4). In accordance with the screening, prioritization, and implementation details report (SPID) andaugmented approach guidance (References 2, 3 and 4), the reevaluated seismic hazard is used todetermine if additional seismic risk evaluations are warranted for a plant. Specifically, the reevaluated horizontal ground motion response spectrum (GMRS) at the control point elevation is compared to theexisting safe shutdown earthquake (SSE) or Individual Plant Examination for External Events (IPEEE)High Capacity Low Probability of Failure (HCLPF) Spectrum (IHS) to determine if a plant is required toperform a high-frequency confirmation.
As noted in the May 9, 2014 letter, River Bend Station is toconduct a limited scope high-frequency confirmation.
Within the May 9, 2014 letter (Reference 6), NRC acknowledged that these limited scope evaluations willrequire additional development of the assessment process.
By Reference 7, Nuclear Energy Institute (NEI) submitted an Electric Power Research Institute (EPRI) report entitled "High Frequency Program:Application Guidance for Functional Confirmation and Fragility Evaluation" (EPRI 3002004396) for NRCreview and endorsement.
NRC endorsement was provided by Reference 8.The high-frequency confirmation for RBS shows that the high-frequency spectral accelerations of thecontrol point GMRS above 10Hz are within the limits identified in Section 3.1.1 of Reference 6 (less thanor equal to 0.2g). Therefore, no additional evaluation is necessary.
The attachment to this letter providesthe SSE (or IHS) and GMRS information from Reference 5.This transmittal completes commitments from Reference
: 4. This letter contains no new regulatory commitments.
Should you have any questions regarding this submittal, please contact Joey Clark at 225-381-4177.
I declare Under penalty of perjury that the foregoing is true and correct.
Executed on December 8, 2015.Sincerely, Sergio VazquezDirector
-Engineering
 
==Attachment:==
 
High-frequency Confirmation for RBScc: U. S. Nuclear Regulatory Commission Region IV1600 East Lamar Blvd.Arlington, TX 76011-4511 RBG-47634 December 8, 2015Page 3 of 3NRC Sr. Resident Inspector P. O. Box 1050St. Francisville, LA 70775Central Records ClerkPublic Utility 'Commission of Texas1701 N. Congress Ave.Austin, TX 78711-3326 Department of Environmental QualityOffice of Environmental Compliance Radiological Emergency Planning and Response SectionJi Young WileyP.O. Box 4312Baton Rouge, LA 70821-4312
*U. S. Nuclear Regulatory Commission iAttn: Steven S. Koenick:'-Mail Stop 8BlA11555 Rockville Pike:-.Rockville, MD 20852-2738 Attachment to RBG-47634 Page 1 of 1High-frequency Confirmato for R8S(Reference Figure 3-2 in EPRI (lf!
' EnteigyEntergy Operations, Inc.River Bend Station5485 U.S. Highway 61 NSt. Francisville, LA 70775December 8, 2015RBG-47634 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk11555 Rockville PikeRockville, MD 20852
 
==Subject:==
 
==References:==
 
High-frequency SUpplement to Seismic Hazard Screening Report, Response NRCRequest for Information Pursuant to 10 CER 50.54(f)
Regarding Recommendation 2.1 ofthe Near-Term Task Force Review of Insights from the Fukushima Dai-ichi AccidentRiver Bend Station -Unit 1Docket No. 50-458License No. NPF-471. NRC Letter, Request for Information Pursuant to Title 10 of the Code of FederalRegulations 50.54(f)
Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi  
: Accident, dated March 12,"20112, ADAMS Accession Number M/L12053A340
*2.: NRC Letter, Electric Power *Research Institute Report 3002000704, "SeismicEvaluation GuidanCe:
Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic,"
as an Acceptable Alternative to the March12, 2012, Information Request for Seismic Reevaluations, dated May 7, 2013, ADAMSAccession Number ML 131 06A3313. NEI Letter, Final Draft of Industry Seismic Evaluation Guidance (EPRI 1025287),
dated November 27, 2012, ADAMS Accession Number ML12333A168 andML1 2333A1 704. NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report1025287, "Seismic Evaluation Guidance",
dated February 15, 2013, ADAMS Accession Number ML1 231 9A0745. Entergy letter dated March 26, 2014, Seismic Hazard Reevaluations and Screening Report (ML 14091A429)
: 6. NRC Letter, Screening and Prioritization Results regarding information pursuant toTitle 10 of the Code of Federal Regulations 50.54(f) regarding Seismic HazardReevaluations for Recommendation 2.1 of the Near-Term Task Force Reviews ofInsights from the Fukushima Dai-ichi
: accident, dated May 9, 2014, (ML14111A147)
: 7. NEI Letter, Request for NRC Endorsement of High Frequency Program:
Application Guidance for Functional Confirmation and Fragility Evaluation (EPRI 3002004396),
datedJuly 30, 20158. NRC letter dated September 15, 2015, Endorsement of Electric Power ResearchInstitute Final Draft Report 3002004396, "High Frequency Program:
Application GuidanceFor Functional Confirmation And Fragility"'
(ML1 521 8A569) / p RBG-47634 December 8, 2015Page 2 of 3
 
==Dear Sir or Madam:==
On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a Request for Information per 10CFR 50.54(f)
(Reference
: 1) to all power reactor licensees.
The required response section of Enclosure 1indicated that licensees should provide a seismic hazard evaluation and screening report within 1 .5 yearsfrom the date of the letter for central and eastern United States (CEUS) nuclear power plants. By NRCletter dated May 7, 2013 (Reference 2), the date to submit the report was extended to March 31, 2014.By letter dated May 9, 2014 (Reference 6), the NRC transmitted the results of the screening andprioritization review of the seismic hazards reevaluation submittal for River Bend Station (RBS)(Reference 4). In accordance with the screening, prioritization, and implementation details report (SPID) andaugmented approach guidance (References 2, 3 and 4), the reevaluated seismic hazard is used todetermine if additional seismic risk evaluations are warranted for a plant. Specifically, the reevaluated horizontal ground motion response spectrum (GMRS) at the control point elevation is compared to theexisting safe shutdown earthquake (SSE) or Individual Plant Examination for External Events (IPEEE)High Capacity Low Probability of Failure (HCLPF) Spectrum (IHS) to determine if a plant is required toperform a high-frequency confirmation.
As noted in the May 9, 2014 letter, River Bend Station is toconduct a limited scope high-frequency confirmation.
Within the May 9, 2014 letter (Reference 6), NRC acknowledged that these limited scope evaluations willrequire additional development of the assessment process.
By Reference 7, Nuclear Energy Institute (NEI) submitted an Electric Power Research Institute (EPRI) report entitled "High Frequency Program:Application Guidance for Functional Confirmation and Fragility Evaluation" (EPRI 3002004396) for NRCreview and endorsement.
NRC endorsement was provided by Reference 8.The high-frequency confirmation for RBS shows that the high-frequency spectral accelerations of thecontrol point GMRS above 10Hz are within the limits identified in Section 3.1.1 of Reference 6 (less thanor equal to 0.2g). Therefore, no additional evaluation is necessary.
The attachment to this letter providesthe SSE (or IHS) and GMRS information from Reference 5.This transmittal completes commitments from Reference
: 4. This letter contains no new regulatory commitments.
Should you have any questions regarding this submittal, please contact Joey Clark at 225-381-4177.
I declare Under penalty of perjury that the foregoing is true and correct.
Executed on December 8, 2015.Sincerely, Sergio VazquezDirector
-Engineering
 
==Attachment:==
 
High-frequency Confirmation for RBScc: U. S. Nuclear Regulatory Commission Region IV1600 East Lamar Blvd.Arlington, TX 76011-4511 RBG-47634 December 8, 2015Page 3 of 3NRC Sr. Resident Inspector P. O. Box 1050St. Francisville, LA 70775Central Records ClerkPublic Utility 'Commission of Texas1701 N. Congress Ave.Austin, TX 78711-3326 Department of Environmental QualityOffice of Environmental Compliance Radiological Emergency Planning and Response SectionJi Young WileyP.O. Box 4312Baton Rouge, LA 70821-4312
*U. S. Nuclear Regulatory Commission iAttn: Steven S. Koenick:'-Mail Stop 8BlA11555 Rockville Pike:-.Rockville, MD 20852-2738 Attachment to RBG-47634 Page 1 of 1High-frequency Confirmato for R8S(Reference Figure 3-2 in EPRI (lf!}}

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