View source for RA-13-018, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - 1.5 Year Response for CEUS Site

{{Adams
| number = ML13312A918
| issue date = 09/11/2013
| title = Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - 1.5 Year Response for CEUS Site
| author name = Waldrep B
| author affiliation = Duke Energy Carolinas, LLC
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000261, 05000324, 05000325, 05000400
| license number = DPR-023, DPR-062, DPR-071, NPR-063
| contact person = 
| case reference number = RA-13-018
| document type = Letter type:RA
| page count = 23
| project = 
| stage = Response to RAI
}}

=Text=
{{#Wiki_filter:Benjamin C.Waldrep 526 South Church Street DUKE                                                                                  Charlotte,NC 28202 MailingAddress:
ENERGY,                                                                            P.O. Box 1006- EC07H Charlotte,NC 28201-1006 Office: 704 382 8162 Fax: 704 382 6056 Benjamin.Waldreplduke.energy.com 10 CFR 50.54 (f)
Serial RA-13-018 September 11, 2013 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 Duke Energy Progress, Inc., formerly known as Carolina Power & Light Company Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Docket Nos. 50-325 and 50-324 Renewed License Nos. DPR-71 and DPR-62 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400 Renewed License No. NPF-63 H. B. Robinson Steam Electric Plant, Unit No. 2 Docket No. 50-261 Renewed License No. DPR-23

==Subject:==
Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - 1.5 Year Response for CEUS Sites

==References:==
: 1. NRC Letter, Request for Information Pursuantto Title 10 of the Code of Federal Regulations 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, ADAMS Accession No. ML12053A340
: 2. EPRI Report 1025287, Seismic Evaluation Guidance, Screening, Prioritizationand Implementation Details (SPID) for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic, ADAMS Accession No. ML12333A170
: 3. NRC Letter, Endorsement of EPRI Final Draft Report 1025287, "SeismicEvaluation Guidance,"dated February 15, 2013, ADAMS Accession No. ML12319A074
: 4. NEI Letter, Proposed Path Forwardfor NTTF Recommendation 2.1: Seismic Reevaluations,dated April 9, 2013, ADAMS Accession No. ML13101A379

U. S. Nuclear Regulatory Commission Serial RA-13-018 Page 2
: 5. Duke Energy Letter, Response to NRC Request for Information Pursuantto 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichiAccident, dated April 26, 2013, ADAMS Accession No. ML13121A063
: 6. NRC Letter, EPRI FinalDraft Report X00XXXX,        "SeismicEvaluation Guidance:
Augmented Approach for the Resolution of 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 No. ML13106A331
: 7. NRC Letter, Status of 60-DayResponse to Issuance of Seismic Evaluation Guidance Related to the Near-Term Task Force Recommendation 2.1, Seismic, dated August 2, 2013, ADAMS Accession No. ML13161A286 Ladies and Gentlemen:
On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference I to all power reactor licensees and holders of construction permits in active or deferred status. Enclosure 1 of Reference 1 requested each addressee in the Central and Eastern United States (CEUS) to submit a written response consistent with the requested seismic hazard evaluation information (i.e., items 1 through 7) by September 12, 2013. Reference 2 provides industry guidance for responding to Reference 1. Section 4 of Reference 2 identifies the detailed information to be included in the seismic hazard evaluation submittals. On February 15, 2013, the NRC issued Reference 3, endorsing the industry guidance (i.e., Reference 2).
On April 9, 2013, the Nuclear Energy Institute (NEI) submitted Reference 4 to the NRC, requesting NRC agreement to delay submittal of some of the CEUS seismic hazard evaluation information so that an update to the Electric Power Research Institute (EPRI) (i.e., 2004 and 2006) ground motion attenuation model could be completed and used to develop that information. NEI proposed that descriptions of subsurface materials and properties and base case velocity profiles (i.e., items 3a and 3b in Section 4 of Reference 2) be submitted to the NRC by September 12, 2013, with the remaining seismic hazard and screening information submitted to NRC by March 31, 2014.
In Reference 5, Duke Energy provided the 60-day response to the NRC, as required by Reference 1. The response informed the NRC that Duke Energy intended to follow the alternative approach and schedule set forth in Reference 4. In Reference 6 the NRC approved the schedule modification (i.e., Reference 4). Based on the NRC approval of Reference 4, the NRC issued a letter on August 2, 2013 (i.e., Reference 7) and acknowledged the Duke Energy response (i.e., Reference 5) was acceptable.
The enclosures to this letter contain the requested descriptions of subsurface materials and properties and base case velocity profiles for Brunswick Steam Electric Plant, Shearon Harris Nuclear Power Plant, and H. B. Robinson Steam Electric Plant. The geotechnical profile data included as Table 1 of each enclosure is from the plant design record. Table 2 is based on Table 1 for the reactor building control point. The profiles provided in Table 2 and Figure 1 of each enclosure represent a Mean Base Case (Profile 1), a Lower Bound (Profile 2), and an Upper Bound (Profile 3).

U. S. Nuclear Regulatory Commission Serial RA-13-018 Page 3 This information is being provided for Catawba Nuclear Station, McGuire Nuclear Station, Oconee Nuclear Station, and Crystal River Unit 3 under separate cover letters. The information provided in the attachments to this letter is considered an interim product of seismic hazard development efforts being performed for the industry by EPRI. The complete and final seismic hazard reports for Duke Energy will be provided to the NRC in our seismic hazard submittals by March 31, 2014 in accordance with Reference 5.
This letter contains no new regulatory commitments.
If you have any questions regarding this report, please contact Jeff Thomas, Fukushima Response Support Manager, at (704) 382-3438.
I declare under penalty of perjury that the foregoing is true and correct. Executed on September 11, 2013.
Sincerely, BejnC.       lrep Vice Preside tr Corporate Governance &
Operation Support

==Enclosures:==
Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles for Brunswick Steam Electric Plant (BSEP), Unit Nos. 1 and 2, Docket Nos. 50-325 and 50-324, Renewed License Nos. DPR-71 and DPR-62      Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles for Shearon Harris Nuclear Power Plant (SHNPP), Unit No. 1, Docket No. 50-400, Renewed License No. NPF-63      Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles for H. B. Robinson Steam Electric Plant (HBRSEP), Unit No. 2, Docket No. 50-261, Renewed License No. DPR-23

U. S. Nuclear Regulatory Commission Serial RA-13-018 Page 4 xc:
V. M. McCree, Region IIAdministrator U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Avenue NE, Suite 1200 Atlanta, GA 30303-1257 C. Gratton, NRR Project Manager (BSEP, Unit Nos. I and 2)
U. S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 8G9A Rockville, MD 20852-2738 A. Hon, NRR Project Manager (SHNPP, Unit 1)
U. S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 08G-9a Rockville, MD 20852-2738 S. P. Lingam, NRR Project Manager (HBRSEP, Unit No. 2)
U. S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 8 G9A Rockville, MD 20852-2738 M. P. Catts, Senior Resident Inspector Brunswick Steam Electric Plant, Unit Nos. 1 and 2 K. M. Ellis, Senior Resident Inspector H. B. Robinson Steam Electric Plant, Unit No. 2 J. D. Austin, Senior Resident Inspector Shearon Harris Nuclear Power Plant, Unit 1

ENCLOSURE I DESCRIPTIONS OF SUBSURFACE MATERIALS AND PROPERTIES AND BASE CASE VELOCITY PROFILES FOR BRUNSWICK STEAM ELECTRIC PLANT (BSEP), UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324 RENEWED LICENSE NOS. DPR-71 AND DPR-62 El-1

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 BRUNSWICK STEAM ELECTRIC PLANT (BSEP)
Brunswick Steam Electric Plant Site Description The basic information used to create the site geologic profile at the Brunswick Steam Electric Plant is shown in Table 1. This profile was developed using information documented in Reference 1 of this enclosure. As indicated in Reference 1 of this enclosure, the safe shutdown earthquake (SSE) Control Point is at depth 47.83', Elevation -28.33', and the profile was modeled up to this elevation. For dynamic properties of soft rock layers, modulus and damping curves were represented with two models. The first model used rock curves taken from Reference 2 of this enclosure, the second model assumed linear behavior. These dynamic property models were weighted equally. For dynamic properties of fill, compacted sand, sand, and clay layers, modulus and damping curves were also represented with two models. The first model used soil curves taken from Reference 2 of this enclosure, the second model used soil curves taken from References 3 and 4 of this enclosure. These dynamic property models were weighted equally. To model the profile, rock modulus and damping curves from Reference 2 of this enclosure were paired with soil modulus and damping curves from Reference 2 of this enclosure and linear rock modulus and damping curves were paired with soil modulus and damping curves from References 3 and 4 of this enclosure.
The 3 base-case shear-wave velocity profiles used to model amplification at the site are shown in Figure 1. Profiles 1, 2, and 3 are weighted 0.4, 0.3, and 0.3, respectively. Thicknesses, depths, and shear-wave velocities (Vs) corresponding to each profile are shown in Table 2.
References
: 1. URS (2012). Site Geologic Conditions for Brunswick Nuclear Power Plant - Revision 2, Report dated 12/03/2012.
: 2. EPRI (1993). Guidelines for DeterminingDesign Basis Ground Motions, Elec. Power Res.
Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.
: 3. Silva, W.J., N. A. Abrahamson, G.R. Toro, and C. Costantino (1996). Description and Validation of the Stochastic Ground Motion Model, Rept. submitted to Brookhaven Nati.
Lab., Assoc. Universities Inc., Upton NY 11973, Contract No. 770573.
: 4. Walling, M.A., W.J., Silva and N.A. Abrahamson (2008). "Nonlinear Site Amplification Factors for Constraining the NGA Models," Earthquake Spectra, 24 (1) 243-255.
E1-2

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 BRUNSWICK STEAM ELECTRIC PLANT (BSEP)
Table 1 Summary of Geotechnical Profile Data for Brunswick Steam Electric Plant Shear Elevation                     Soil/Rock             Densit    Wave Range (feet)                  Description             y (pcf)  Velocity (fps) 19.5***                      Surface                           ---....
6 to > 100 blows per
    +19.5--7         Fill - Confined Compacted Sand       115        750               foot Upper Yorktown - Unconfined                             Weight of Hammer to
      - 25                   Compacted                115        750         4 blows per foot Sand 23 > 100 blows per per
     -25     50           SSE control point - Lower                    -1400   23 >
Yorktown - Natural Dense Sand        130    900-1400              foot 20 >100 blows per
     - 93       Oligocene Sediments - Stiff Clay     145       5500               foot
    - 220            Castle Hayne - Limestone        138      4500 Cretaceous: Peedee Limestone
  -220--Il  -151          -well consolidated shell        130      3000 limestone   that contains amounts   of clay varying
       -1510*                Crystalline basemat          165     10000*
Estimated values
**        Information sourced from Dynamic Soil Properties Calc by AMEC E&I Inc. Table 1 - Soil Profile. January, 19, 2012.
Information sourced from the Updated Final Safety Analysis Report Page. 3-35.
E1-3

Serial RA-13-018 Enclosure I RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 BRUNSWICK STEAM ELECTRIC PLANT (BSEP)
Vs profiles for Brunswick Site Vs (ft/sec) 0    1000     2000    3000       4000      5000      6000      7000       8000    9000  10000 0                                            -~
100 200 i
Il_              II                       1                   1 300 400 50o 600                                                                                                  -Profile 1 9    700  -Ii     -__     -~__
                                                                                                              -Profile     2 800                                                                                                  IIProfile 3
                                                                                 ~                   -t        -
                                                                                                     'V.
900 1000                                                         ___      I      -    ___
                                                                                             -I 1100 1200 V
1300 1400 I LI>K 1500                            _____    ___
1600                                            11711 ifi Figure 1. Vs profiles for Brunswick Steam Electric Plant site E1-4

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 BRUNSWICK STEAM ELECTRIC PLANT (BSEP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Brunswick site Profile 1                          Profile 2                        Profile 3 depth                             depth                            depth thickness(ft)     (ft)      Vs(ft/s) thickness(ft) (ft       Vs(ft/s) thickness(ft) (ft)       Vs(ft/s) 0   1122                         0    898                         0     1403 5.0          5.0   1122            5.0        5.0    898            5.0        5.0     1403 5.0         10.0   1122            5.0       10.0    898            5.0       10.0     1403 5.0         15.0   1122            5.0       15.0    898            5.0       15.0     1403 5.0         20.0   1122            5.0       20.0    898            5.0       20.0     1403 1.7         21.7   1122            1.7       21.7    898            1.7       21.7     1403 4.0         25.7   5500            4.0       25.7   4400            4.0       25.7     6875 5.0         30.7   5500            5.0       30.7   4400            5.0       30.7     6875 5.0         35.7   5500            5.0       35.7   4400            5.0       35.7     6875 5.0         40.7   5500            5.0       40.7   4400            5.0       40.7     6875 5.0         45.7   5500            5.0       45.7   4400            5.0       45.7     6875 5.0         50.7   5500            5.0       50.7   4400            5.0       50.7     6875 4.0         54.7   5500            4.0       54.7   4400            4.0       54.7     6875 5.0         59.7   5500            5.0       59.7   4400            5.0       59.7     6875 5.0         64.7   5500            5.0       64.7   4400            5.0       64.7     6875 27.7          92.3   4500           27.7       92.3   2866           27.7       92.3     7065 27.7        120.0    4500           27.7      120.0   2866           27.7     120.0      7065 35.8        155.8    4500           35.8      155.8   2866           35.8     155.8      7065 35.8        191.7    4500           35.8      191.7   2866           35.8     191.7      7065 19.4        211.1    3000           19.4     211.1    1911           19.4     211.1      4710 19.4        230.5    3000           19.4     230.5    1911           19.4     230.5      4710 19.4        250.0    3000           19.4     250.0    1911           19.4     250.0      4710 25.0        275.0    3000           25.0     275.0    1911           25.0     275.0      4710 25.0        300.0    3000           25.0     300.0    1911           25.0     300.0      4710 25.0        325.0    3000           25.0     325.0    1911           25.0     325.0      4710 25.0        350.0    3000           25.0     350.0    1911           25.0     350.0      4710 25.0        375.0    3000           25.0     375.0    1911           25.0     375.0      4710 25.0        400.0    3000           25.0     400.0    1911           25.0     400.0      4710 25.0        425.0    3000           25.0     425.0    1911           25.0     425.0      4710 25.0        450.0    3000           25.0     450.0    1911           25.0     450.0      4710 25.0        475.0    3000           25.0     475.0    1911           25.0     475.0      4710 25.0        500.0    3000           25.0     500.0    1911           25.0     500.0      4710 E1-5

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 BRUNSWICK STEAM ELECTRIC PLANT (BSEP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Brunswick site Profile 1                         Profile 2                        Profile 3 depth                             depth                            depth thickness(ft)    (ft)      Vs(ft/s) thickness(ft) (ft)      Vs(ft/s) thickness(ft) (ft)      Vs(ft/s) 32.7       532.7    3000           32.7     532.7    1911           32.7     532.7     4710 32.7       565.4    3000           32.7     565.4    1911           32.7     565.4     4710 32.7       598.1    3000           32.7     598.1    1911           32.7     598.1     4710 32.7       630.9    3000           32.7     630.9    1911           32.7     630.9     4710 32.7       663.6    3000           32.7     663.6    1911           32.7     663.6     4710 32.7       696.3    3000           32.7     696.3    1911           32.7     696.3     4710 32.7       729.0    3000           32.7     729.0    1911           32.7     729.0     4710 32.7       761.7    3000           32.7     761.7    1911           32.7     761.7     4710 32.7       794.5    3000           32.7     794.5    1911           32.7     794.5     4710 32.7       827.2    3000           32.7     827.2    1911           32.7     827.2     4710 32.7       859.9    3000           32.7     859.9    1911           32.7     859.9     4710 32.7       892.6    3000           32.7     892.6    1911           32.7     892.6     4710 32.7       925.3    3000           32.7     925.3    1911           32.7     925.3     4710 32.7       958.1    3000           32.7     958.1    1911           32.7     958.1     4710 32.7       990.8    3000           32.7     990.8    1911           32.7     990.8     4710 32.7 1023.5         3000           32.7 1023.5       1911           32.7 1023.5        4710 32.7 1056.2         3000           32.7 1056.2       1911           32.7 1056.2        4710 32.7 1088.9         3000           32.7 1088.9       1911           32.7 1088.9        4710 32.7 1121.7         3000           32.7 1121.7       1911           32.7 1121.7        4710 32.7 1154.4         3000           32.7 1154.4       1911           32.7 1154.4        4710 32.7 1187.1         3000           32.7 1187.1       1911           32.7 1187.1        4710 32.7 1219.8         3000           32.7 1219.8       1911           32.7 1219.8        4710 32.7 1252.5         3000           32.7 1252.5       1911           32.7 1252.5        4710 32.7 1285.3         3000           32.7 1285.3       1911           32.7 1285.3        4710 32.7 1318.0         3000           32.7 1318.0       1911           32.7 1318.0        4710 32.7 1350.7         3000           32.7 1350.7       1911           32.7 1350.7        4710 32.7 1383.4         3000           32.7 1383.4       1911           32.7 1383.4        4710 32.7 1416.1         3000           32.7 1416.1       1911           32.7 1416.1        4710 32.7 1448.9         3000           32.7 1448.9       1911           32.7 1448.9        4710 32.7 1481.6         3000           32.7 1481.6       1911           32.7 1481.6        4710 3280.8 4762.4         9285        3280.8 4762.4        9285         3280.8 4762.4        9285 E1-6

ENCLOSURE 2 DESCRIPTIONS OF SUBSURFACE MATERIALS AND PROPERTIES AND BASE CASE VELOCITY PROFILES FOR SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP), UNIT 1 DOCKET NOS. 50-400 RENEWED LICENSE NO. NPF-63 E2-1

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Shearon Harris Nuclear Power Plant Site Description The basic information used to create the site geologic profile at the Shearon Harris Nuclear Power Plant is shown in Table 1. This profile was developed using information documented in Reference 1 of this enclosure. As indicated in Table 1, the safe shutdown earthquake (SSE)
Control Point is defined at the top of "sound bedrock," and site amplifications correspond to that location. For dynamic properties, modulus and damping curves for rock layers were represented with two models. The first model used rock curves taken from Reference 2 of this enclosure, the second model assumed linear behavior. These dynamic property models were weighted equally.
The 3 base-case shear-wave velocity profiles used to model amplification at the site are shown in Figure 1. Profiles 1, 2, and 3 are weighted 0.4, 0.3, and 0.3, respectively. Thicknesses, depths, and shear-wave velocities (Vs) corresponding to each profile are shown in Table 2.
References
: 1. URS (2012). Site Geologic Conditions for Shearon HarrisNuclear GeneratingStation-Revision 1, Letter Report PE-HNP-A07-12267 dated September 21, 2012, transmitted by letter from B. Alumbaugh to C. Albers dated September 25, 2012.
: 2. EPRI (1993). Guidelines for DeterminingDesign Basis Ground Motions, Elec. Power Res.
Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.
E2-2

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Table 1 Summary of Geotechnical Profile Data for Shearon Harris Nuclear Power Plant (1)
Shear Depth                                                   Wave     Compressional Range                                        Density Velocity    Wave Velocity        Poisson's (feet)         Soil/Rock Description        (pcf) (2j   (fps)         (fps)             ratio 0-8                Residual Soil             130       50V"          1500              0.44 Weathered and Fractured 8-16                    Rock                  160       2500          5500              0.37 Sound Bedrock Below 16           (SSE Control Point)          160       5600         12000              0.35 Note: Estimated depth to crystalline basement rocks at the site is approximately 5000 ft Note: On Page 2.5-189 of the Shearon Harris Advanced Reactor Units 2 and 3 Combined Construction and Operating License Application, it is assumed that the crystalline basement is the point at which the generic Central and Eastern United States hard rock conditions are encountered and a shear wave velocity of 7600 fps is estimated.
Note: The base case profile used in "Seismic Hazard Results Using the USGS 2008 Seismic Source Model: Brunswick, Crystal River, Harris, and Robinson Nuclear Sites" estimates a shear wave velocity of 9200 fps at a depth of 7000 ft.
(1) Reference Table 2.5.2-3 SHNPP Final Safety Analysis Report (FSAR)
(2) Reference Table 3.7.1-2 SHNPP FSAR (3) This value was assumed on the basis of previous experience under similar conditions.
E2-3

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Vs profiles for Shearon Harris Site Vs (ft/sec) 0      1000   2000      3000     4000    5000 6000       7000 8000  9000 10000 500 1000 1500   .....  . .......................... _                           -
2000                                                  ----                           -             Profile 1 2500  --------                                             . .         -.            -             Profile 2 3 0                                                                                   .............Profile 3 5000                                           ---
F500 1..Vs.profi.es.for....aron.Harris.Nuclear.Power.Plant.
                                   -si Figure 1. Vs profiles for Shearon Harris Nuclear Power Plant site E2-4

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Shearon Harris site Profile 1                          Profile 2                        Profile 3 depth                             depth                            depth thickness(ft)     (ft)      Vs(ft/s) thickness(ft) (ft)      Vs(ft/s) thickness(ft) (ft)       Vs(ft/s) 0   5600                         0   3567                         0    8792 5.0          5.0   5600            5.0        5.0   3567            5.0        5.0    8792 5.0         10.0   5601            5.0       10.0   3568            5.0       10.0    8794 5.0         15.0   5603            5.0       15.0   3569            5.0       15.0    8797 5.0         20.0   5606            5.0       20.0   3571            5.0       20.0    8801 5.0         25.0   5608            5.0       25.0   3573            5.0       25.0    8805 5.0         30.0   5611            5.0       30.0   3574            5.0       30.0    8809 5.0         35.0   5613            5.0       35.0   3576            5.0       35.0    8813 5.0         40.0   5616            5.0       40.0   3577            5.0       40.0    8817 5.0         45.0   5618            5.0       45.0   3579            5.0       45.0    8821 5.0         50.0   5621            5.0       50.0   3581            5.0       50.0    8825 5.0         55.0   5623            5.0       55.0   3582            5.0       55.0    8829 5.0         60.0   5626            5.0       60.0   3584            5.0       60.0    8833 5.0         65.0   5628            5.0       65.0   3585            5.0       65.0    8837 3.0         68.0   5630            3.0       68.0   3586            3.0       68.0    8839 6.0         74.0   5631            6.0       74.0   3587            6.0       74.0    8841 6.0         80.0   5632            6.0       80.0   3588            6.0       80.0    8843 6.0         86.0   5634            6.0       86.0   3589            6.0       86.0    8845 6.0         92.0   5635            6.0       92.0   3589            6.0       92.0    8847 7.0         99.0   5639            7.0       99.0   3592            7.0       99.0    8852 7.0       106.0    5642            7.0     106.0    3594            7.0      106.0    8858 7.0       113.0    5645            7.0     113.0    3596            7.0      113.0    8863 7.0       120.0    5649            7.0     120.0    3598            7.0      120.0    8869 6.0       126.0    5652            6.0     126.0    3600            6.0      126.0    8874 4.0       130.0    5654            4.0     130.0    3602            4.0      130.0    8877 5.0       135.0    5657            5.0     135.0    3603            5.0      135.0    8881 5.0       140.0    5659            5.0     140.0    3605            5.0      140.0    8885 5.0       145.0    5662            5.0      145.0   3606            5.0      145.0    8889 5.0       150.0    5664            5.0      150.0   3608            5.0      150.0    8892 5.0       155.0    5667            5.0      155.0   3610            5.0      155.0    8896 5.0       160.0    5669            5.0      160.0   3611             5.0     160.0    8900 4.0       164.0    5671            4.0      164.0   3612            4.0      164.0    8903 E2-5

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Shearon Harris site Profile 1                         Profile 2                         Profile 3 depth                            depth                             depth thickness(ft)     (ft)     Vs(ft/s) thickness(ft) ft       Vs(ft/s)   thickness(ft) (ft)      Vs(ft/s) 5.0       169.0   5672            5.0     169.0   3613              5.0     169.0    8905 5.0       174.0   5675            5.0     174.0   3615              5.0     174.0    8909 5.0       179.0   5677            5.0     179.0   3616              5.0     179.0    8913 5.0       184.0   5680            5.0     184.0   3618              5.0     184.0    8917 5.0       189.0   5682            5.0     189.0   3620              5.0     189.0    8921 5.0       194.0   5685            5.0     194.0   3621              5.0     194.0    8925 5.0       199.0   5687            5.0     199.0   3623              5.0     199.0    8929 5.0       204.0   5690            5.0     204.0   3624              5.0     204.0    8933 5.0       209.0   5692            5.0     209.0   3626              5.0     209.0    8937 5.0       214.0   5695            5.0     214.0   3628              5.0     214.0    8941 5.0       219.0   5697            5.0     219.0   3629              5.0     219.0    8945 5.0       224.0   5700            5.0     224.0   3631              5.0     224.0    8949 5.0       229.0   5702            5.0     229.0   3632              5.0     229.0    8953 5.0       234.0   5705            5.0     234.0   3634              5.0     234.0    8956 5.0       239.0   5707            5.0     239.0   3636              5.0     239.0    8960 5.0       244.0   5710            5.0     244.0   3637              5.0     244.0    8964 6.0       250.0   5713            6.0     250.0   3639              6.0     250.0    8969 6.3       256.3   5716            6.3     256.3   3641              6.3     256.3    8974 6.3       262.7   5719            6.3     262.7   3643              6.3     262.7    8979 6.3       269.0   5722            6.3     269.0   3645              6.3     269.0    8984 10.0        279.0   5727           10.0     279.0   3648             10.0     279.0    8992 10.0        289.0   5732           10.0     289.0   3651             10.0     289.0    9000 10.0        299.0   5737           10.0     299.0   3655             10.0     299.0    9007 10.0        309.0   5742           10.0     309.0   3658             10.0     309.0    9015 10.0        319.0   5747           10.0     319.0   3661             10.0     319.0    9023 12.0        331.0   5753           12.0     331.0   3665             12.0     331.0    9033 10.0       341.0   5758           10.0     341.0   3668             10.0     341.0    9040 10.0        351.0   5763           10.0     351.0   3671             10.0     351.0    9048 10.0        361.0   5768           10.0     361.0   3674             10.0     361.0    9056 10.0       371.0   5773           10.0     371.0   3678             10.0     371.0    9064 10.0       381.0   5778           10.0     381.0   3681             10.0     381.0    9072 12.0       393.0   5784           12.0     393.0   3685             12.0     393.0    9081 7.0       400.0   5788            7.0     400.0   3687              7.0     400.0    9087 E2-6

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Shearon Harris site Profile 1                          Profile 2                       Profile 3 depth                             depth                           depth thickness(ft)     (ft)     Vs(ft/s) thickness(ft) (ft)      Vs(ft/s) thickness(ft) (if)      Vs(ft/s) 10.0        410.0   5790           10.0      410.0   3688           10.0     410.0    9091 10.0        420.0   5795           10.0      420.0   3692           10.0     420.0    9099 10.0        430.0   5800           10.0      430.0   3695           10.0     430.0    9106 10.0        440.0   5805           10.0      440.0   3698           10.0     440.0    9114 10.0       450.0   5810           10.0      450.0   3701           10.0     450.0    9122 10.0       460.0   5815           10.0      460.0   3704           10.0     460.0    9130 10.0        470.0   5820           10.0      470.0   3707           10.0     470.0    9138 10.0        480.0   5825           10.0      480.0   3711           10.0     480.0    9146 10.0       490.0   5830           10.0      490.0   3714           10.0     490.0    9153 10.0       500.0   5837           10.0      500.0   3718           10.0     500.0    9164 104.7        604.7   5863          104.7      604.7   3735          104.7     604.7    9205 104.7        709.5   5916          104.7      709.5   3768          104.7     709.5    9285 104.7        814.2   5968          104.7      814.2   3802          104.7     814.2    9285 104.7        919.0   6020          104.7      919.0   3835          104.7     919.0    9285 104.7 1023.7         6073          104.7 1023.7       3868          104.7 1023.7       9285 104.7 1128.4         6125          104.7 1128.4       3902          104.7 1128.4       9285 104.7 1233.2         6177          104.7 1233.2       3935          104.7 1233.2       9285 104.7 1337.9         6230          104.7 1337.9       3968          104.7 1337.9       9285 104.7 1442.7         6282          104.7 1442.7       4002          104.7 1442.7       9285 104.7 1547.4         6335          104.7 1547.4       4035          104.7 1547.4       9285 104.7 1652.2         6387          104.7 1652.2       4068          104.7 1652.2       9285 104.7 1756.9         6439          104.7 1756.9       4102          104.7 1756.9       9285 104.7 1861.7         6492          104.7 1861.7       4135          104.7 1861.7       9285 104.7 1966.4         6544          104.7 1966.4       4169          104.7 1966.4       9285 104.7 2071.1         6596          104.7 2071.1       4202          104.7 2071.1       9285 104.7 2175.9         6649          104.7 2175.9       4235          104.7 2175.9       9285 104.7 2280.6         6701          104.7 2280.6       4269          104.7 2280.6       9285 104.7 2385.4         6754          104.7 2385.4       4302          104.7 2385.4       9285 104.7 2490.1         6806          104.7 2490.1       4335          104.7 2490.1       9285 104.7 2594.9         6858          104.7 2594.9       4369          104.7 2594.9       9285 135.2 2730.1         6918          135.2 2730.1       4407          135.2 2730.1       9285 135.2 2865.3         6986          135.2 2865.3       4450          135.2 2865.3       9285 135.2 3000.6         7054          135.2 3000.6       4493          135.2 3000.6       9285 E2-7

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 SHEARON HARRIS NUCLEAR POWER PLANT (SHNPP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Shearon Harris site Profile 1                         Profile 2                          Profile 3 depth                            depth                              depth thickness(ft)     (f)      Vs(ft/s) thickness(ft) ft      Vs(ft/s)    thickness(ft) _ f)      Vs(ft/s) 135.2 3135.8         7121          135.2 3135.8     4536             135.2 3135.8       9285 135.2 3271.1         7189          135.2 3271.1     4579             135.2 3271.1       9285 135.2 3406.3         7256          135.2 3406.3     4622             135.2 3406.3       9285 135.2 3541.6         7324          135.2 3541.6     4665             135.2 3541.6       9285 135.2 3676.8         7392          135.2 3676.8     4708             135.2 3676.8       9285 135.2 3812.0         7459          135.2 3812.0     4752             135.2 3812.0       9285 135.2 3947.3         7527          135.2 3947.3     4795             135.2 3947.3       9285 135.2 4082.5         7594          135.2 4082.5     4838             135.2 4082.5       9285 135.2 4217.8         7662          135.2 4217.8     4881             135.2 4217.8       9285 135.2 4353.0         7730          135.2 4353.0     4924             135.2 4353.0       9285 135.2 4488.3         7797          135.2 4488.3     4967             135.2 4488.3       9285 135.2 4623.5         7865          135.2 4623.5     5010             135.2 4623.5       9285 135.2 4758.7         7933          135.2 4758.7     5053             135.2 4758.7       9285 135.2 4894.0         8000          135.2 4894.0     5096             135.2 4894.0       9285 105.8 4999.7         8053          105.8 4999.7     5130             105.8 4999.7       9285 3280.8 8280.6         9285        3280.8 8280.6      9285            3280.8 8280.6       9285 E2-8

ENCLOSURE 3 DESCRIPTIONS OF SUBSURFACE MATERIALS AND PROPERTIES AND BASE CASE VELOCITY PROFILES FOR H. B. ROBINSON STEAM ELECTIC PLANT (HBRSEP), UNIT NO. 2 DOCKET NOS. 50-261 RENEWED LICENSE NO. DPR-23 E3-1

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 H. B. ROBINSON STEAM ELECTRIC PLANT (HBRSEP)
H. B. Robinson Steam Electric Plant Site Description The basic information used to create the site geologic profile at the H. B. Robinson Steam Electric Plant is shown in Table 1. This profile was developed using information documented in Reference 1 of this enclosure. As indicated in Reference 1 of this enclosure, the safe shutdown earthquake (SSE) is defined at the ground surface elevation, so the profile up to the ground surface has been modeled for site amplification. For dynamic properties of sand, gravel, clay, sandstone, and mudstone layers, modulus and damping curves were represented with two models. The first model used soil curves taken from Reference 2 of this enclosure, the second model used soil curves taken from Reference 3 of this enclosure and Reference 4 of this enclosure. These dynamic property models were weighted equally.
The 3 base-case shear-wave velocity profiles used to model amplification at the site are shown in Figure 1. Profiles 1, 2, and 3 are weighted 0.4, 0.3, and 0.3, respectively. Thicknesses, depths, and shear-wave velocities (Vs) corresponding to each profile are shown in Table 2.
References
: 1. URS (2012). Site Geologic Conditions for H.B Robinson Steam Electric Plant,Unit 2, Letter Report PE-RNP-A07-12128 dated July 9, 2012, transmitted by letter from B. Alumbaugh to C. Albers dated July 9, 2012.
: 2. EPRI (1993). Guidelinesfor Determining Design Basis Ground Motions, Elec. Power Res.
Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.
: 3. Silva, W.J., N. A. Abrahamson, G.R. Toro, and C. Costantino (1996). Descriptionand Validation of the Stochastic Ground Motion Model, Rept. submitted to Brookhaven NatI.
Lab., Assoc. Universities Inc., Upton NY 11973, Contract No. 770573.
: 4. Walling, M.A., W.J., Silva and N.A. Abrahamson (2008). "Nonlinear Site Amplification Factors for Constraining the NGA Models," EarthquakeSpectra, 24 (1) 243-255.
E3-2

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 H. B. ROBINSON STEAM ELECTRIC PLANT (HBRSEP)
Table 1 Summary of Geotechnical Profile Data for H. B. Robinson Steam Electric Plant Shear Depth*                                                      Wave     Compressional       Assumed Range                                           Density   Velocity    Wave Velocity      Poisson's (feet)          Soil/Rock Description           (pcf)        (fps)       (fps)             ratio 0 to 56               Recent Alluvium (Sand and Gravel)            125       1000**        1500              0.33 Cretaceous Middendorf 56 to 460         (Sands, Silty and Sandy Clay, Sandstone and Mudstone)                130        3600         7200              0.33 Pre-Cambrian Crystalline
    > 460          (Granite, Gneiss, Phyllite Schist)                170        11200       17500               0.15
* Measured from EL. 226 ft.
**   The original soil profile data obtained from Figure 2.5.1-2 of the HBRSEP Unit 2 Updated Final Safety Analysis Report (UFSAR) has been adjusted based on recommendations of MACTEC in EC54720-ZOO Attachment A. Figure 2.5.1-2 had a shear wave velocity of 750 fps for the first 30ft of soil (measured from EL. 226 ft); whereas, MACTEC suggested an adjusted value of 1000 fps for the first 70ft of soil (measured from EL. 240 ft). All other soil profile data in Table 2 remains the same as given in Figure 2.5.1-2 of the UFSAR.
E3-3

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 H. B. ROBINSON STEAM ELECTRIC PLANT (HBRSEP)
Vs profiles for Robinson Si te Vs (ft/sec) 0    1000   2000   3000           4000      5000    6000 7000 80100 9000 10000
                                        ------ I 100
                                                                                              -Profile      1 200              --
                                                                                              -Profile      2 f250                  -
Profile 3 300 350 400                     --        --     &#xf7; 450                       -L_
500                                        __...
Figure 1. Vs profiles for H. B. Robinson Steam Electric Plant site E3-4

Serial RA-13-018 RESPONSE REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 H. B. ROBINSON STEAM ELECTRIC PLANT (HBRSEP)
Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Robinson site Profile 1                            Profile 2                        Profile 3 depth                               depth                            depth thickness(ft)     (ft)        Vs(ft/s) thickness(ft) (ft)      Vs(ft/s) thickness(ft) (ft)       Vs(ft/s) 0     1000                         0    640                         0    1570 5.6          5.6     1000            5.6        5.6    640            5.6        5.6    1570 5.6         11.2     1000            5.6       11.2    640            5.6       11.2    1570 5.6         16.8     1000            5.6       16.8    640            5.6       16.8    1570 5.6         22.4     1000            5.6       22.4    640            5.6       22.4    1570 5.6         28.1     1000            5.6       28.1    640            5.6       28.1    1570 5.6         33.7     1000            5.6       33.7    640            5.6       33.7    1570 5.6         39.3     1000            5.6       39.3    640            5.6       39.3    1570 5.6         44.9     1000            5.6       44.9    640            5.6       44.9    1570 5.6         50.5     1000            5.6       50.5    640            5.6       50.5    1570 5.6         56.1     1000            5.6       56.1    640            5.6       56.1    1570 5.0         61.1     1566            5.0       61.1   1002            5.0       61.1    2458 4.0         65.1     1706            4.0       65.1   1092            4.0       65.1    2679 7.4         72.5     1914            7.4       72.5   1225            7.4       72.5    3005 7.5         80.1    2110             7.5       80.1   1350            7.5       80.1    3312 11.0         91.0    2312            11.0       91.0   1480           11.0       91.0    3630 15.0       106.0     2531            15.0     106.0    1620           15.0     106.0     3974 18.0       124.0     2815            18.0     124.0    1802           18.0     124.0     4420 22,0        146.1     3100            22.0     146.1    1984           22.0     146.1     4867 25.0        171.1      3380           25.0     171.1    2163           25.0     171.1     5306 33.0       204.1       3720           33.0     204.1    2381           33.0     204.1     5840 42.0       246.1      4150            42.0     246.1    2656           42.0     246.1     6515 35.0        281.1      4520           35.0     281.1    2893           35.0     281.1     7096 35.0        316.1     4520            35.0     316.1    2893           35.0     316.1     7096 33.3        349.4     4780            33.3     349.4    3059           33.3     349.4     7504 33.3        382.7      4780           33.3     382.7    3059           33.3     382.7     7504 33.3        416.1     4780            33.3     416.1    3059           33.3     416.1     7504 44.0       460.1      4780            44.0     460.1    3059           44.0     460.1     7504 3280.8      3740.9       9285        3280.8 3740.9        9285         3280.8 3740.9        9285 E3-5}}