View source for NG-15-0342, High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information, Per to 10CFR50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of: Insights from the Fukushima Dai-ichi Accident

{{Adams
| number = ML15352A114
| issue date = 12/15/2015
| title = High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information, Per to 10CFR50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of: Insights from the Fukushima Dai-ichi Accident
| author name = Vehec T
| author affiliation = NextEra Energy Duane Arnold, LLC
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000331
| license number = DPR-049
| contact person = 
| case reference number = NG-15-0342
| document type = Letter type:NG, Response to Request for Additional Information (RAI)
| page count = 6
| project = 
| stage = Supplement
}}

=Text=
{{#Wiki_filter:NEx~era December 15, 2015 NG-1 5-0342 10 CFR 50.54(f)
U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Duane Arnold Energy Center Docket No. 50-331 Renewed Op. License No. DPR-49 NextEra Energy Duane Arnold, LLC's High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of: Insights from the Fukushima Dai-ichi Accident

==References:==
: 1) NRC Letter, Request forIn formation Pursuantto 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-ichiAccident, dated March 12, 2012 (ML12053A340)
: 2) NRC Letter, Electric Power Research Institute Report 3002000704, "Seismic Evaluation Guidance: Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic," as an Acceptable Alternative to the March 12, 2012, Information Request for Seismic Reevaluations, dated May 7, 2013, ADAMS Accession Number ML13106A331
: 3) NRC Letter, Duane Arnold Energy Center-Screening and Prioritization Results regarding information pursuant to Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f)
Related to Seismic Hazard Re-evaluations for Recommendation 2.1 of the Near-Term Task Force Reviews of Insights from the Fukushima Dai-ichi accident, dated August 21, 2014, ADAMS Accession Number ML14198A070
: 4) NextEra Energy Duane Arnold, LLC Seismic Hazard and Screening Report (CEUS Sites), Response to NRC Request for Information Pursuant to 10OCFR50.54(f) regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, NG-14-0092, dated March 28, 2014, ADAMS Accession Number ML14092A331 AD/v NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Pal0, IA 52324

Document Control Desk NG-1 5-0342 Page 2 of 3
: 5) NEI Letter, Final Draft of Industry Seismic Evaluation Guidance (EPRI 1025287), dated November 27, 2012, ADAMS Accession Number ML12333A168 and ML12333A170
: 6) NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report 1025287, "Seismic Evaluation Guidance",
dated February 15, 2013, ADAMS Accession Number ML12319A074
: 7) NRC Letter, Screening and Prioritization Results regarding information pursuant to Title 10 of the Code of Federal Regulations 50.54(f) regarding Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Reviews of Insights from the Fukushima Dai-ichi accident, dated May 9, 2014, ADAMS Accession Number ML1411I1A147
: 8) NEI Letter, Request for NRC Endorsement of High Frequency Program: Application Guidance for Functional Confirmation and Fragility Evaluation (EPRI 3002004396), dated July 30, 2015, ADAMS Accession Number ML15223A100
: 9) NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report 3002004396, "High Frequency Program:
Application Guidance for Functional Confirmation and Fragility",
dated September 17, 2015, ADAMS Accession Number MLI1521 8A569 On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a Request for Information per 10 CFR 50.54(f) (Reference 1) to all power reactor licensees. The required response section of Enclosure 1 indicated that licensees should provide a Seismic Hazard Evaluation and Screening Report within 1.5 years from the date of the letter for Central and Eastern United States (CEUS) nuclear power plants. By NRC letter dated May 7, 2013 (Reference 2), the date to submit the report was extended to March 31, 2014.
By letter dated August 21, 2014 (Reference 3), the NRC transmitted the results of the screening and prioritization review of the seismic hazards reevaluation submittal for the Duane Arnold Energy Center (Reference 4). In accordance with the screening, prioritization, and implementation details report (SPID) and Augmented Approach guidance (References 2, 5 and 6), the reevaluated seismic hazard is used to determine 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 the existing safe shutdown earthquake (SSE) to determine if a plant is required to perform a high frequency confirmation.
As noted in the August 21, 2014 letter (Reference 3), the NRC concludes that consistent with the industry guidance, the Duane Arnold Energy Center should

Document Control Desk NG-1 5-0342 Page 3 of 3 be "screened-out" of performing the seismic risk evaluation, spent fuel pool evaluation, and expedited approach evaluation requested per the 50.54(f) letter (Reference 1). Duane Arnold Energy Center, however, is to perform a limited scope high frequency evaluation for those structures and components susceptible to high frequency accelerations because the re-evaluated ground motion response spectra (GMRS) exceeds the current safe shutdown earthquake above 10 Hz.
Within the May 9, 2014 letter (Reference 7), NRC acknowledged that these limited scope evaluations will require additional development of the assessment process. By Reference 8, the Nuclear Energy Institute (NEI) submitted an Electric Power Research Institute (EPRI) report entitled High Frequency Program:~Application Guidance for FunctionalConfirmation and Fragility Evaluation (EPRI 3002004396) for NRC review and endorsement. NRC endorsement was provided by Reference 9.
The High Frequency Confirmation for Duane Arnold Energy Center shows that the high-frequency spectral accelerations of the control point GMRS above 10Hz are within the limits identified in Section 3.1.1 of Reference 8 (less than or equal to 0.2g); therefore, no additional evaluation is necessary. The enclosure to this letter provides the SSE and GMRS information from Reference 4.
If you have any questions or require additional information, please contact Curt Bock at 319-851-7645.-...
This letter makes no new commitments or changes to existing commitments.
I declare under penalty of perjury that the foregoing isr true and correct.
Executed on December 15, 2015 f~      homas Vehec
 -Vice      President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC

==Enclosure:==
GMRS and SSE Supporting Information cc:      Regional Administrator, USNRC, Region III Resident Inspector, USNRC, Duane Arnold Energy Center Project Manager, USNRC, Duane Arnold Energy Center

Enclosure to NG-15-0342 GMRS and SSE Supportingi Information For the Duane Arnold Enerqy Center 2 pages follow

Enclosure to NG-15-0324 Page 1 of 2 Table 1: SSE and GMRS Data SSE       GMRS Frequency        (g)        (g) 100.00      0.120      0.0881 90.00      0.120      0.0885 80.00      0.120      0.0895 70.00      0.120      0.0917 60.00      0.120      0.0978 50.00      0.120      0.1140 40.00      0.120      0.1370 35.00      0.120      0.1470 30.00      0.120      0.1590 25.00      0.140      0.1690 20.00      0.174      0.1740 15.00      0.200      0.1790 12.50      0.210      0.1760 10.00      0.224      0.1680 9.00      0.230      0.1600 8.00      0.234      0.1520 7.00      0.238      0.1440 6.00      0.256      0..1350 5.00      0.280      0.1210 4700       0.306      0.1030 3.50      0.318      0.0929 3.00      0.320      0.0806 2.50      0.318      0.0684 2.00      0.292      0.0666 1.50      0.180      0.0594 1.25      0.124      0.0581 1.00      0.128      0.0536 0.90      0.116      0.0514 0.80      0.100      0.0495 0.70      0.074      0.0476 0.60      0.070      0.0457 0.50      0.054      0.0435 0.40                 0.0348 0.35                 0.0304 0.30                 0.0261 0.25                 0.0217 0.20                 0.0174 0.15                 0.0130 0.125                 0.0109 0.10     ____0.00869

Enclosure to NG-15-0342 Page 2 of 2 Figure 1: GMRS to SSE Comparison 0.350   -     - -   ---      F--:--  ------                    ,-----------....              ...---------- I t      /             *~~~SSE ..     ..       ..
                        ' I  !   L~~                                       -    GMRS    ,   !,
0.250 .   ...                                    _                     ___      ___  __
Ii                                                                Ii
                  ~               1.00100.0
                                  .. .....                    10.00.
Frequency (Hz.)

NEx~era December 15, 2015 NG-1 5-0342 10 CFR 50.54(f)
U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Duane Arnold Energy Center Docket No. 50-331 Renewed Op. License No. DPR-49 NextEra Energy Duane Arnold, LLC's High Frequency Supplement to Seismic Hazard Screening Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of: Insights from the Fukushima Dai-ichi Accident

==References:==
: 1) NRC Letter, Request forIn formation Pursuantto 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-ichiAccident, dated March 12, 2012 (ML12053A340)
: 2) NRC Letter, Electric Power Research Institute Report 3002000704, "Seismic Evaluation Guidance: Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic," as an Acceptable Alternative to the March 12, 2012, Information Request for Seismic Reevaluations, dated May 7, 2013, ADAMS Accession Number ML13106A331
: 3) NRC Letter, Duane Arnold Energy Center-Screening and Prioritization Results regarding information pursuant to Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f)
Related to Seismic Hazard Re-evaluations for Recommendation 2.1 of the Near-Term Task Force Reviews of Insights from the Fukushima Dai-ichi accident, dated August 21, 2014, ADAMS Accession Number ML14198A070
: 4) NextEra Energy Duane Arnold, LLC Seismic Hazard and Screening Report (CEUS Sites), Response to NRC Request for Information Pursuant to 10OCFR50.54(f) regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, NG-14-0092, dated March 28, 2014, ADAMS Accession Number ML14092A331 AD/v NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Pal0, IA 52324

Document Control Desk NG-1 5-0342 Page 2 of 3
: 5) NEI Letter, Final Draft of Industry Seismic Evaluation Guidance (EPRI 1025287), dated November 27, 2012, ADAMS Accession Number ML12333A168 and ML12333A170
: 6) NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report 1025287, "Seismic Evaluation Guidance",
dated February 15, 2013, ADAMS Accession Number ML12319A074
: 7) NRC Letter, Screening and Prioritization Results regarding information pursuant to Title 10 of the Code of Federal Regulations 50.54(f) regarding Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Reviews of Insights from the Fukushima Dai-ichi accident, dated May 9, 2014, ADAMS Accession Number ML1411I1A147
: 8) NEI Letter, Request for NRC Endorsement of High Frequency Program: Application Guidance for Functional Confirmation and Fragility Evaluation (EPRI 3002004396), dated July 30, 2015, ADAMS Accession Number ML15223A100
: 9) NRC Letter, Endorsement of Electric Power Research Institute Final Draft Report 3002004396, "High Frequency Program:
Application Guidance for Functional Confirmation and Fragility",
dated September 17, 2015, ADAMS Accession Number MLI1521 8A569 On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a Request for Information per 10 CFR 50.54(f) (Reference 1) to all power reactor licensees. The required response section of Enclosure 1 indicated that licensees should provide a Seismic Hazard Evaluation and Screening Report within 1.5 years from the date of the letter for Central and Eastern United States (CEUS) nuclear power plants. By NRC letter dated May 7, 2013 (Reference 2), the date to submit the report was extended to March 31, 2014.
By letter dated August 21, 2014 (Reference 3), the NRC transmitted the results of the screening and prioritization review of the seismic hazards reevaluation submittal for the Duane Arnold Energy Center (Reference 4). In accordance with the screening, prioritization, and implementation details report (SPID) and Augmented Approach guidance (References 2, 5 and 6), the reevaluated seismic hazard is used to determine 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 the existing safe shutdown earthquake (SSE) to determine if a plant is required to perform a high frequency confirmation.
As noted in the August 21, 2014 letter (Reference 3), the NRC concludes that consistent with the industry guidance, the Duane Arnold Energy Center should

Document Control Desk NG-1 5-0342 Page 3 of 3 be "screened-out" of performing the seismic risk evaluation, spent fuel pool evaluation, and expedited approach evaluation requested per the 50.54(f) letter (Reference 1). Duane Arnold Energy Center, however, is to perform a limited scope high frequency evaluation for those structures and components susceptible to high frequency accelerations because the re-evaluated ground motion response spectra (GMRS) exceeds the current safe shutdown earthquake above 10 Hz.
Within the May 9, 2014 letter (Reference 7), NRC acknowledged that these limited scope evaluations will require additional development of the assessment process. By Reference 8, the Nuclear Energy Institute (NEI) submitted an Electric Power Research Institute (EPRI) report entitled High Frequency Program:~Application Guidance for FunctionalConfirmation and Fragility Evaluation (EPRI 3002004396) for NRC review and endorsement. NRC endorsement was provided by Reference 9.
The High Frequency Confirmation for Duane Arnold Energy Center shows that the high-frequency spectral accelerations of the control point GMRS above 10Hz are within the limits identified in Section 3.1.1 of Reference 8 (less than or equal to 0.2g); therefore, no additional evaluation is necessary. The enclosure to this letter provides the SSE and GMRS information from Reference 4.
If you have any questions or require additional information, please contact Curt Bock at 319-851-7645.-...
This letter makes no new commitments or changes to existing commitments.
I declare under penalty of perjury that the foregoing isr true and correct.
Executed on December 15, 2015 f~      homas Vehec
 -Vice      President, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC

==Enclosure:==
GMRS and SSE Supporting Information cc:      Regional Administrator, USNRC, Region III Resident Inspector, USNRC, Duane Arnold Energy Center Project Manager, USNRC, Duane Arnold Energy Center

Enclosure to NG-15-0342 GMRS and SSE Supportingi Information For the Duane Arnold Enerqy Center 2 pages follow

Enclosure to NG-15-0324 Page 1 of 2 Table 1: SSE and GMRS Data SSE       GMRS Frequency        (g)        (g) 100.00      0.120      0.0881 90.00      0.120      0.0885 80.00      0.120      0.0895 70.00      0.120      0.0917 60.00      0.120      0.0978 50.00      0.120      0.1140 40.00      0.120      0.1370 35.00      0.120      0.1470 30.00      0.120      0.1590 25.00      0.140      0.1690 20.00      0.174      0.1740 15.00      0.200      0.1790 12.50      0.210      0.1760 10.00      0.224      0.1680 9.00      0.230      0.1600 8.00      0.234      0.1520 7.00      0.238      0.1440 6.00      0.256      0..1350 5.00      0.280      0.1210 4700       0.306      0.1030 3.50      0.318      0.0929 3.00      0.320      0.0806 2.50      0.318      0.0684 2.00      0.292      0.0666 1.50      0.180      0.0594 1.25      0.124      0.0581 1.00      0.128      0.0536 0.90      0.116      0.0514 0.80      0.100      0.0495 0.70      0.074      0.0476 0.60      0.070      0.0457 0.50      0.054      0.0435 0.40                 0.0348 0.35                 0.0304 0.30                 0.0261 0.25                 0.0217 0.20                 0.0174 0.15                 0.0130 0.125                 0.0109 0.10     ____0.00869

Enclosure to NG-15-0342 Page 2 of 2 Figure 1: GMRS to SSE Comparison 0.350   -     - -   ---      F--:--  ------                    ,-----------....              ...---------- I t      /             *~~~SSE ..     ..       ..
                        ' I  !   L~~                                       -    GMRS    ,   !,
0.250 .   ...                                    _                     ___      ___  __
Ii                                                                Ii
                  ~               1.00100.0
                                  .. .....                    10.00.
Frequency (Hz.)}}