ML13260A014
| ML13260A014 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry, Watts Bar, Sequoyah, Bellefonte  |
| Issue date: | 09/12/2013 |
| From: | James Shea Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML13260A014 (30) | |
Text
Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 September 12, 2013 10 CFR 50.4 10 CFR 50.54(f)
Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Bellefonte Nuclear Plant, Units 1 and 2 Construction Permit Nos. CPPR-122 and CPPR-123 NRC Docket Nos. 50-438 and 50-439 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328 Watts Bar Nuclear Plant, Unit 1 Facility Operating License No. NPF-90 NRC Docket No. 50-390 Watts Bar Nuclear Plant, Unit 2 Construction Permit No. CPPR-92 NRC Docket No. 50-391
Subject:
Tennessee Valley Authority's Fleet 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 Pursuant to 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-ichi Accident, dated March 12, 2012 Prited on -eycled paper 7
U.S. Nuclear Regulatory Commission Page 2 September 12, 2013
- 2. NRC Letter, "Endorsement of EPRI Final Draft Report 1025287, "Seismic Evaluation Guidance,"" dated February 15, 2013
- 3. EPRI Report 1025287, "Seismic Evaluation Guidance: Screening, Prioritization and Implementation Details (SPID) for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic," 2013 Technical Report
- 4. NEI Letter to NRC, "Proposed Path Forward for NTTF Recommendation 2.1: Seismic Reevaluations," dated April 9, 2013
- 5. NRC Letter to NEI, "EPRI Final Draft Report XXXXXX, "Seismic Evaluation 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 On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference 1 to all power reactor licensees and holders of construction permits in active or deferred status. 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 (items 1 through 7) by September 12, 2013. On February 15, 2013, NRC issued Reference 2, endorsing the Reference 3 industry guidance for responding to Reference 1. Section 4 of Reference 3 identifies the detailed information to be included in the seismic hazard evaluation submittals.
On April 9, 2013, Nuclear Energy Institute (NEI) submitted Reference 4 to 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) (2004, 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 (items 3a and 3b in Section 4 of Reference 3) be submitted to NRC by September 12, 2013, with the remaining seismic hazard and screening information submitted to NRC by March 31, 2014. In Reference 5, NRC agreed with this recommendation.
The enclosure to this letter contains the requested descriptions of subsurface materials and properties and base case velocity profiles for Tennessee Valley Authority's (TVA's)
Bellefonte Nuclear Plant, Browns Ferry Nuclear Plant, Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant. The information provided in the enclosure 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 TVA will be provided to the NRC in the seismic hazard submittals by March 31, 2014, in accordance with Reference 5.
U. S. Nuclear Regulatory Commission Page 3 September 12, 2013 This letter contains no new regulatory commitments.
Should you have any questions concerning the content of this letter, please contact Kevin Casey at (423) 751-8523.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 12th day of September 2013.
Respey
- ully, J.
ea V ce resident, Nuclear Licensing
Enclosure:
Seismic Site Descriptions for Tennessee Valley Authority's Bellefonte Nuclear Plant, Browns Ferry Nuclear Plant, Sequoyah Nuclear Plant, and Watts Bar Nuclear Plant cc (Enclosure):
NRR Director - NRC Headquarters NRO Director - NRC Headquarters NRC Regional Administrator - Region II NRR Project Manager - Bellefonte Nuclear Plant NRR Project Manager - Browns Ferry Nuclear Plant NRR Project Manager - Sequoyah Nuclear Plant NRR Project Manager - Watts Bar Nuclear Plant, Unit 1 NRR Project Manager - Watts Bar Nuclear Plant, Unit 2 NRC Senior Resident Inspector - Browns Ferry Nuclear Plant NRC Senior Resident Inspector - Sequoyah Nuclear Plant NRC Senior Resident Inspector - Watts Bar Nuclear Plant, Unit 1 NRC Senior Resident Inspector - Watts Bar Nuclear Plant, Unit 2
ENCLOSURE SEISMIC SITE DESCRIPTIONS FOR TENNESSEE VALLEY AUTHORITY'S BELLEFONTE NUCLEAR PLANT, BROWNS FERRY NUCLEAR PLANT, SEQUOYAH NUCLEAR PLANT AND WATTS BAR NUCLEAR PLANT
ENCLOSURE This enclosure contains the requested descriptions of subsurface materials and properties and base case velocity profiles for Tennessee Valley Authority's (TVA) nuclear sites. These descriptions were provided by Electric Power Research Institute (EPRI) in support of the NRC March 12, 2012, 10 CFR 50.54(f) Request for Information letter regarding seismic aspect of Recommendation 2.1.
The attachments to this enclosure provide the descriptions for the respective site: - Bellefonte Nuclear Plant Site Description - Browns Ferry Nuclear Plant Site Description - Sequoyah Nuclear Plant Description - Watts Bar Nuclear Plant Description Note, in Attachment 2 and 3 Table 1A, "Summary of Geotechnical Profile Data," for Browns Ferry Nuclear Plant (BFN) and Sequoyah Nuclear Plant (SQN), both sites did not have readily available measured shear strain data for alluvial clays and silts over residual clays and silts. The alluvial clays and silts seen in the Tennessee River Valley are similar; therefore, the referenced Watts Bar Final Safety Analysis Report (FSAR) Figures shear strain data was utilized for both BFN and SQN descriptions. Since BFN and SQN have limited and indirect data on shear wave velocities, multiple profiles or base cases have been developed to account for epistemic uncertainty in alignment with EPRI Technical Report 1025287, "Seismic Evaluation Guidance," Section 2.4.1 and Appendix B.
E-1 of 1
Attachment I Bellefonte Nuclear Plant Site Description The basic information used to evaluate the site geologic profile at the Bellefonte site is shown in Table 1. The basis for this profile information is given in Reference 1. The site geologic profile indicates that hard rock (shear-wave velocity generally exceeding 9200 ft/sec) underlies the site. As a result, the Bellefonte site was treated as a hard-rock site and no site amplification factors were calculated for the site.
References
- 1. Bechtel Corp (2012). Dynamic Soil Column for Unit 1 Reactor Building, Bechtel calculation 25644-012-KOC-CY05-Q0014 dated 10/1/12 (transmitted by letter dated 10/17/12 from Matyas to Birchell). Table 1 Summary of Geotechnical Profile for Bellefonte Unit 1 Reactor Building Depth Eeva*ot Control Lt.W TOW Unit am Wft Comapiression W
WW Range, ft Range ft Point Unit Weiht
- VelItY, Vk Rato pdt fps
- Velocity, Ground Surface Reddish brown highly plastic day 0-34 646-612 Elevation Backfill with ce to litt amounts of sand 124 810 1,980 0.4 ation and gravel 1
at 646ft Medium gray limestone (micrdte Foundation and wackestone) with interbeds of 9,210 17,850 0,316 34-81 612-565 Elevation dark gray argillaceous and silty
+/- 380
+970
+/- 0.024 at 612 ft limestone Medium gray limestone (micrtlre, 10,320 19,390 0.300 81-206 565-440 MSRUnitB packstone, and wacktone) with 170+/-2
+580
+1,170
+/-0.027 dark gray, wavy dolomitic lami ee Dark gray argillaceous and silty 20 28 40 68MRUntC dolomitic limestone with interbeds 155 + 10 8,180 15,680 0.312 208-278 440-368 MSR UniC c of medium gray dolomitic 8+1,000
+1,610 0.025
_limestone 1
278-416 368-230 MSRUniO Medium graylimestonewithdark 170+/-2 10,600 20,000 0.303 gray, wavy dolomitic laminae
-0_2 320
+990
+/-0.022 NOTES:
- 1. MSR - Middle Stones River.
- 2. Top of rock profile at Unit 1 Reactor Building, El612ft.
- 3. Ground surface elevation near the Unit I Reactor Building is 646 ft.
- 4. Groundwater level elevation at 625 ft.
- 5. Shear and compression wave velocity data for rock from P-S suspension logging, Reference 1.
- 6. Shear wave velocity data for backill! from seismic CPT logging, Reference 1.
- 7. General rock descriptions from Reference 3,
- 8. Best estimate and range values provided for unit weight, velocity, and Poisson's ratio.
EA1-1 of 1 Browns Ferry Nuclear Plant Site Description The basic information used to create the site geologic profile at the Browns Ferry Nuclear Plant is shown in Tables 1A and 1B. This profile was developed using information documented in Reference 1. As indicated in Table 1A, the SSE Control Point is at a depth of 52 ft., and the profile was modeled up to this location. For dynamic properties of soft rock layers, modulus and damping curves were represented with 2 models. The first model used rock curves taken from Reference 2, 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. AMEC (2013). Seismic Data Retrieval Information for EPRI Near Term Task Force Recommendation 2.1 TVA Browns Ferry Nuclear Plant Athens, Alabama, AMEC Project 3043121013 report transmitted by letter from K. Campbell to M. Best on June 26, 2013.
- 2. EPRI (1993). Guidelines for Determining Design Basis Ground Motions, Elec. Power Res. Inst., Palo Alto, CA, Rept. TR-1 02293, Vol. 1-5. Table 1A Summary of Geotechnical Profile Data for Browns Ferry Nuclear Plant Recommended G/Gmax Damping Depth Soil/Rock Density Measured Vs for Analyses Gmax vs. Shear Ratio (feet)
Description (pcf)
Vs (fps)
(fps)
(psf)
Stran vs. Shear Strain Ground Surface Elev. 565-0 Control Point for GMRS Alluvial Clays, 700-Use Use Alluialts, o700
-Watts Bar Watts Bar 0 - 50 Silts over 120 1,800 1,050 4,000,000 FSAR FSAR Residual Clays, Average Figure Figure 2.5-Silts**
1,067 2.5-233E 233F 50
- 52 Dolomite and 50-52 Limestone 165 8,000*
330,000,000 1
No Change Deepest Structure 52 Foundation Control Point -
SSE GMRS52-100 Dolomite and 165 8,000 330,000,000 1
No Change LimestoneI Fossiliferous 165 8,000 330,000,000 1
No Change 200 Chert Notes:
- Calculated from laboratory measured Shear Modulus, G
- Replaced with engineered backfill for safety-related structures.
EA2-1 of 7 Table 1 B Summary of Geologic Profile for Browns Ferry Nuclear Plant Extended to Basement Depth Soil/Rock Rock Formation Best Lower Range Upper Range (feet)
Description*
Estimate Vs Vs (fps)***
Vs (fps)***
(fps)**
Overburden, alluvial clays, Mt - Tuscumbia 1050****
1800****
0-50 silts over residual clays, silts.
Limestone 700..8.
Thickness 0 to 50 feet.
Limestone, light gray, thin-to medium-bedded, siliceous with nodules of light to dark Mfp - Fort Payne 50-250 gray fossiliferous chert; lower Chert 9500 7600 9285 part of unit locally siliceous dark gray shale. Thickness 100 to 200 feet.
Shale, black to gray, 250-carbonaceous, radioactive, Dc-325 pyritiferous, fissile. Weathers Chattanooga 7000 5600 8750 to a greenish gray soil.
Shale Thickness 0 to 66 feet.
Shale and siltstone with thin limestone, gray to reddish-gray, contains one or more hematite rich ore beds in lower half; shale and siltstone Srm - Red 325-interbedded with light green Mountain 7000 5600 8750 1025 or gray, thick-bedded Formation sandstone in upper half.
Thick, light gray limestone unit near middle of interval.
Thickness 300 to 700 feet.
Limestone, light to dark gray, thin-to medium-bedded, fine 1025-grained, highly argillaceous Os - Sequatchie 1225 and fossiliferous, interbedded 9500 6050 9285 with variegated greenish-gray and maroon calcareous shale.
Thickness about 200 feet.
Limestone, light to medium gray, cryptocrystalline to coarsely crystalline, slabby to Oc -
1225-medium-bedded, argillaceous Chickamauga 9500 6050 9285 1825 in part; numerous thin bentonite layers. Bentonites Group separate Unit I from Unit I1.
Thickness 200 to 600 feet.
Dolomite and minor limestone, very siliceous, 1825-light-to dark-gray, fine-to OCk - Knox 3425 coarse-grained, thin-to thick-
- Group, 7000 4460 9285 bedded, weathers to cherty Undifferentiated rubble. Thickness about 2,600 feet.
EA2-2 of 7 Table 1 B (continued)
Depth SoillRock Rock Formation Best Lower Range Upper Range (feet)
Description*
Estimate Vs Vs (fps)***
Vs (fps)***
(fps)**
Shale, gray and greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; limestone, thin-bedded, edgewise conglomerates consisting of dolomitic rip-up clasts Cc - Conasauga 3425-throughout the middle and Cc L
Conasauga 9285 th omto.
Group Lower 7000 4460 98 4025 upper part of the formation.
Undivided Lower part consists of interbedded siltstone, and shale, gray and greenish-gray, thin-bedded, glauconitic, micaceous, commonly bioturbated, a few marine shell fossils found.
Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with shale and 4025-siltstone, reddish-brown, Cr - Rome 4200 olive greenish-gray, light-Formation 10,000 6370 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
> 4200 Basement 12,000 7640 9285
- Note: Rock Descriptions obtained from "Stratigraphic Succession Along the Appalachian Structural Front in Alabama," dated 1969, Drahovzal and Neathery; and from the Geologic Map of the Decatur Quadrangle, dated 2008, Lemiszki, Kohl, and Sutton
- Note: These values were based on SASW testing by Dr. Ken Stokoe at the Watts Bar nuclear plant site, which consists of similar rock formation to base these values upon.
Ivan Wong from URS assisted Dr. Stokoe and AMEC in developing a lognormal average for the best estimate.
- Note: The lower and upper ranges were based on the best estimate, with the upper range constrained not to exceed 9285 fps. For depths of 0-50 ft, these values were calculated using a Vs value for limestone of 9500 fps and a certainty of 1.25. For depths of 50-1000 ft, these values were calculated using a certainty of 1.25. For depths of 1000 ft to basement, these values were calculated using a certainty of 1.57.
- Note: These values were not determined by the same methods outlined in **Note and
- Note. These values were obtained from the previous geotechnical exploration shown in Table 1.
EA2-3 of 7
I Vs profiles for Browns Ferry Site Vs (ft/sec) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 500 1000 1500
,,,,,,--Profile 1 "2000
,,,,,,-,-Profile 2
-CL Profile 3 2500 3000 3500 4000 4500 Figure 1. Vs profiles for Browns Ferry site EA2-4 of 7 Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Browns Ferry 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 9285 0
5942 0
9285 10.0 10.0 9285 10.0 10.0 5942 10.0 10.0 9285 10.0 20.0 9285 10.0 20.0 5942 10.0 20.0 9285 8.0 28.0 9285 8.0 28.0 5942 8.0 28.0 9285 10.0 38.0 9285 10.0 38.0 5942 10.0 38.0 9285 10.0 48.0 9285 10.0 48.0 5942 10.0 48.0 9285 2.0 50.0 9285 2.0 50.0 5942 2.0 50.0 9285 10.0 60.0 9285 10.0 60.0 5942 10.0 60.0 9285 10.0 70.0 9285 10.0 70.0 5942 10.0 70.0 9285 10.0 80.0 9285 10.0 80.0 5942 10.0 80.0 9285 10.0 90.0 9285 10.0 90.0 5942 10.0 90.0 9285 10.0 100.0 9285 10.0 100.0 5942 10.0 100.0 9285 10.0 110.0 9285 10.0 110.0 5942 10.0 110.0 9285 10.0 120.0 9285 10.0 120.0 5942 10.0 120.0 9285 10.0 130.0 9285 10.0 130.0 5942 10.0 130.0 9285 10.0 140.0 9285 10.0 140.0 5942 10.0 140.0 9285 8.0 148.0 9285 8.0 148.0 5942 8.0 148.0 9285 2.0 150.0 9285 2.0 150.0 5942 2.0 150.0 9285 10.0 160.0 9285 10.0 160.0 5942 10.0 160.0 9285 10.0 170.0 9285 10.0 170.0 5942 10.0 170.0 9285 10.0 180.0 9285 10.0 180.0 5942 10.0 180.0 9285 10.0 190.0 9285 10.0 190.0 5942 10.0 190.0 9285 8.0 198.0 9285 8.0 198.0 5942 10.0 200.0 9285 10.0 208.0 7000 10.0 208.0 4480 10.0 210.0 9285 10.0 218.0 7000 10.0 218.0 4480 10.0 220.0 9285 10.0 228.0 7000 10.0 228.0 4480 10.0 230.0 9285 10.0 238.0 7000 10.0 238.0 4480 10.0 240.0 9285 10.0 248.0 7000 10.0 248.0 4480 10.0 250.0 9285 10.0 258.0 7000 10.0 258.0 4480 10.0 260.0 9285 10.0 268.0 7000 10.0 268.0 4480 10.0 270.0 9285 10.0 278.0 7000 10.0 278.0 4480 10.0 280.0 9285 10.0 288.0 7000 10.0 288.0 4480 10.0 290.0 9285 10.0 298.0 7000 10.0 298.0 4480 10.0 300.0 9285 10.0 308.0 7000 10.0 308.0 4480 10.0 310.0 9285 10.0 318.0 7000 10.0 318.0 4480 10.0 320.0 9285 10.0 328.0 7000 10.0 328.0 4480 10.0 330.0 9285 EA2-5 of 7 Table 2 (continued)
Profile 1 Profile 2 Profile 3 depth depth depth thickness(ft)
(f)
Vs(ff/s) thickness(ft)
(f)
Vs(ft/s) thickness(ft)
(f)
Vs(ft/s) 10.0 338.0 7000 10.0 338.0 4480 10.0 340.0 9285 10.0 348.0 7000 10.0 348.0 4480 10.0 350.0 9285 10.0 358.0 7000 10.0 358.0 4480 10.0 360.0 9285 10.0 368.0 7000 10.0 368.0 4480 10.0 370.0 9285 10.0 378.0 7000 10.0 378.0 4480 10.0 380.0 9285 10.0 388.0 7000 10.0 388.0 4480 10.0 390.0 9285 10.0 398.0 7000 10.0 398.0 4480 10.0 400.0 9285 10.0 408.0 7000 10.0 408.0 4480 10.0 410.0 9285 10.0 418.0 7000 10.0 418.0 4480 10.0 420.0 9285 10.0 428.0 7000 10.0 428.0 4480 10.0 430.0 9285 10.0 438.0 7000 10.0 438.0 4480 10.0 440.0 9285 10.0 448.0 7000 10.0 448.0 4480 10.0 450.0 9285 10.0 458.0 7000 10.0 458.0 4480 10.0 460.0 9285 10.0 468.0 7000 10.0 468.0 4480 10.0 470.0 9285 10.0 478.0 7000 10.0 478.0 4480 10.0 480.0 9285 10.0 488.0 7000 10.0 488.0 4480 10.0 490.0 9285 10.0 498.0 7000 10.0 498.0 4480 10.0 500.0 9285 40.8 538.8 7000 40.8 538.8 4480 40.8 540.8 9285 40.8 579.6 7000 40.8 579.6 4480 40.8 581.6 9285 40.8 620.4 7000 40.8 620.4 4480 40.8 622.4 9285 40.8 661.2 7000 40.8 661.2 4480 40.8 663.2 9285 40.8 702.0 7000 40.8 702.0 4480 40.8 704.0 9285 40.8 742.8 7000 40.8 742.8 4480 40.8 744.8 9285 40.8 783.6 7000 40.8 783.6 4480 40.8 785.6 9285 40.8 824.4 7000 40.8 824.4 4480 40.8 826.4 9285 40.8 865.2 7000 40.8 865.2 4480 40.8 867.2 9285 40.8 906.0 7000 40.8 906.0 4480 40.8 908.0 9285 67.0 973.0 7000 67.0 973.0 4480 409.2 1317.1 9285 71.9 1044.9 9285 71.9 1044.9 5942 409.2 1726.3 9285 71.9 1116.7 9285 71.9 1116.7 5942 409.2 2135.5 9285 401.4 1518.1 7000 401.4 1518.1 4480 409.2 2544.7 9285 408.9 1927.0 7000 408.9 1927.0 4480 409.2 2953.9 9285 409.2 2336.2 7000 409.2 2336.2 4480 409.2 3363.0 9285 409.2 2745.3 7000 409.2 2745.3 4480 409.2 3772.2 9285 409.2 3154.5 7000 409.2 3154.5 4480 409.2 4181.4 9285 409.2 3563.7 7000 409.2 3563.7 4480 409.2 4590.6 9285 409.2 3972.9 7000 409.2 3972.9 4480 409.2 4999.8 9285 EA2-6 of 7 Table 2 (continued)
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) 3280.8 7253.7 9285 3280.8 7253.7 9285 3280.8 8280.6 9285 EA2-7 of 7 Sequoyah Nuclear Plant Site Description The basic information used to create the site geologic profile at the Sequoyah Nuclear Plant is shown in Tables 1A and lB. This profile was developed using information documented in Reference 1. As indicated in Reference 1, the SSE Control Point is at a depth of 64 ft., and the profile was modeled up to this location. For dynamic properties of soft rock layers, modulus and damping curves were represented with 2 models. The first model used rock curves taken from Reference 2, 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. AMEC (2013). Seismic Data Retrieval Information for EPRI Near Term Task Force Recommendation 2.1 TVA Sequoyah Nuclear Plant Soddy Daisy, Tennessee, Letter report, AMEC Proj. 3043132002, Letter from K. Campbell to M. Jones dated June 26, 2013.
- 2. EPRI (1993). Guidelines for Determining Design Basis Ground Motions, Elec. Power Res. Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.
EA3-1 of 7 Table 1A Summary of Geotechnical Profile Data for Sequoyah Nuclear Plant Vs for G/Gmax Damping Depth Soil/Rock Density Measured Vs*
Analyses Gmax Ratio vs.
(feet)
Description (pcf)
(fps)
(fps)
(psf)
VS.sShear Shear Strain Ground Surface Elev. 705 Use Use Watts Bar Watts Bar 0-38 Residual Clays and 115 442 - 3,050 1,200 3,700,000 FSAR FSAR Silts**
Average 1,180 Figure Figure 2.5-233E 2.5-233F 38-64 Limestone with 170 4,873 - 9,697 6,700 237,000,000 No interbedded Shale Average 6,723
(+/-1,000)
Change Deepest Structure Foundation 64 Control Point-SSE GMRS Limestone with 4,873 - 9,697 6,700 No 64-103 inebde hl 170 4,873-9,697 6,700 Iinterbedded Shale Average 6,723
(+/-1,000)
Change The range of shear wave velocities measured in various geophysical tests performed at the site.
- Replaced with engineered backfill for safety related structures.
EA3-2 of 7 Table 1B Summary of Geologic Profile for Sequoyah Nuclear Plant Extended to Basement Depth Soil/Rock Description*
Rock Formation Best Estimate Lower Range Upper Range (feet)
Vs (fps)**
VS (fps)***
Vs (fps)***
Shale, light-green to brown; limestone, medium-gray, 0-1500 dolomitic, coarse-grained, oolitic, Cc - Conasauga 6000 4800 7500 and commonly conglomeratic; Group, Undivided lower part consists of shale and siltstone.
Kingston Fault Upper part consists of greenish-gray and grayish-red calcisiltite and claystone. Lower part is a light-gray, thick-bedded 1500-calcilutite. A basal conglomerate, Ops - Pond 1650 occurring locally, is slight Spring Formation 9500 6050 9285 greenish-to reddish-gray dolosiltite, with thin-to medium-bedded, light greenish-gray calcilutite and calcisiltite, or lenses of shale and sandstone.
Dolomite and minor limestone, very siliceous, light-to dark-gray, OCk - Knox 1650-fine-to coarse-grained, thin-to
- Group, 7000 4460 9285 4800 thick-bedded, weathers to Undifferentiated cherty rubble. Thickness about 2,600 feet.
Shale, light-green to brown; limestone, medium-gray, 4800-dolomitic, coarse-grained, oolitic, Cc - Conasauga 7000 4460 9285 6250 and commonly conglomeratic; Group, Undivided lower part consists of shale and siltstone.
Consists of sandstone, siltstone, 6250-and shale. Formation not Cr - Rome 7580 exposed; shown in structure Formation 10,000 6370 9285 section only.
Chattanooga I_
Fault Dolomite and minor limestone, very siliceous, light-to dark-gray, 06k - Knox 7580-fine-to coarse-grained, thin-to
- Group, 7000 4460 9285 9700 thick-bedded, weathers to Undifferentiated cherty rubble. Thickness about 2,600 feet.
Shale, light-green to brown; limestone, medium-gray, 9700-dolomitic, coarse-grained, oolitic, Cc - Conasauga 7000 4460 9285 11,150 and commonly conglomeratic; Group, Undivided lower part consists of shale and siltstone.
EA3-3 of 7 Table 1 B (continued)
Depth Soil/Rock Description*
Rock Formation Best Estimate Lower Range Upper Range (feet)
Vs (fps)**
Vs (fps)***
Vs (fps)***
Consists of sandstone, siltstone, 11,150-and shale. Formation not Cr - Rome 10,000 6370 9285 11,900 exposed; shown in structure Formation section only.
Sequatchie Valley Fault Consists of sandstone, siltstone, 11,900-and shale. Formation not Cr - Rome 10,000 6370 9285 12,350 exposed; shown in structure Formation section only.
I
>12,350 Basement 12,000 7640 9285
'*Note: Rock Descriptions obtained from "Stratigraphic Succession Along the Appalachian Structural Front in Alabama," dated 1969, Drahovzal and Neathery; and from the Geologic Map of the Decatur Quadrangle, dated 2008, Lemiszki, Kohl, and Sutton
- Note: These values were based on SASW testing by Dr. Ken Stokoe at the Watts Bar nuclear plant site, which consists of similar rock formation to base these values upon.
Ivan Wong from URS assisted Dr. Stokoe and AMEC in developing a lognormal average for the best estimate.
- Note: The lower and upper ranges were based on the best estimate, with the upper range constrained not to exceed 9285 fps. For depths of 0-1500 ft, these values were calculated using a certainty of 1.25. For depths of 1500 ft to basement, these values were calculated using a certainty of 1.57.
EA3-4 of 7
Vs profiles for Sequoyah Site Vs (ft/sec) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0
500 1000 1500 2000 2500 3000 0" 3500 4000 4500 5000 5500 6000 6500 Profile 1
-Profile 2
-Profile 3 Figure 1. Vs profiles for Sequoyah site EA3-5 of 7 Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Sequoyah site Profile 1 Profile 2 Profile 3 depth depth depth thickness(f)
(f)
Vs(ft/s) thickness(ft)
()
Vs(lt/s) thickness(ft)
()
Vs(ft/s) 0 6000 0
3821 0
9285 6.7 6.7 6000 6.7 6.7 3821 6.7 6.7 9285 6.7 13.3 6000 6.7 13.3 3821 6.7 13.3 9285 6.7 20.0 6000 6.7 20.0 3821 6.7 20.0 9285 10.0 30.0 6000 10.0 30.0 3821 10.0 30.0 9285 10.0 40.0 6000 10.0 40.0 3821 10.0 40.0 9285 10.0 50.0 6000 10.0 50.0 3821 10.0 50.0 9285 10.0 60.0 6000 10.0 60.0 3821 10.0 60.0 9285 10.0 70.0 6000 10.0 70.0 3821 10.0 70.0 9285 10.0 80.0 6000 10.0 80.0 3821 10.0 80.0 9285 10.0 90.0 6000 10.0 90.0 3821 10.0 90.0 9285 10.0 100.0 6000 10.0 100.0 3821 10.0 100.0 9285 10.0 110.0 6000 10.0 110.0 3821 10.0 110.0 9285 10.0 120.0 6000 10.0 120.0 3821 10.0 120.0 9285 13.0 133.0 6000 13.0 133.0 3821 13.0 133.0 9285 13.0 146.0 6000 13.0 146.0 3821 13.0 146.0 9285 13.0 159.0 6000 13.0 159.0 3821 13.0 159.0 9285 13.0 172.0 6000 13.0 172.0 3821 13.0 172.0 9285 13.0 185.0 6000 13.0 185.0 3821 13.0 185.0 9285 13.0 198.0 6000 13.0 198.0 3821 13.0 198.0 9285 13.0 211.0 6000 13.0 211.0 3821 13.0 211.0 9285 13.0 224.0 6000 13.0 224.0 3821 13.0 224.0 9285 13.0 237.0 6000 13.0 237.0 3821 13.0 237.0 9285 13.0 250.0 6000 13.0 250.0 3821 13.0 250.0 9285 25.0 275.0 6000 25.0 275.0 3821 25.0 275.0 9285 25.0 300.0 6000 25.0 300.0 3821 25.0 300.0 9285 25.0 325.0 6000 25.0 325.0 3821 25.0 325.0 9285 25.0 350.0 6000 25.0 350.0 3821 25.0 350.0 9285 25.0 375.0 6000 25.0 375.0 3821 25.0 375.0 9285 25.0 400.0 6000 25.0 400.0 3821 25.0 400.0 9285 25.0 425.0 6000 25.0 425.0 3821 25.0 425.0 9285 25.0 450.0 6000 25.0 450.0 3821 25.0 450.0 9285 25.0 475.0 6000 25.0 475.0 3821 25.0 475.0 9285 25.0 500.0 6000 25.0 500.0 3821 25.0 500.0 9285 36.0 536.0 6000 36.0 536.0 3821 36.0 536.0 9285 EA3-6 of 7 Table 2 (continued)
Profile 1 Profile 2 Profile 3 depth depth depth thickness(ft)
(ft)
Vs(ft/s) thickness(ft)
(f)
Vs(ft./s) thickness(ft)
(ft)
Vs(ft/s) 225.0 761.0 6000 225.0 761.0 3821 225.0 761.0 9285 225.0 985.9 6000 225.0 985.9 3821 225.0 985.9 9285 225.0 1210.9 6000 225.0 1210.9 3821 225.0 1210.9 9285 225.0 1435.9 6000 225.0 1435.9 3821 225.0 1435.9 9285 75.0 1510.9 9285 75.0 1510.9 6051 75.0 1510.9 9285 75.0 1585.9 9285 75.0 1585.9 6051 75.0 1585.9 9285 225.0 1810.9 7000 225.0 1810.9 4458 225.0 1810.9 9285 225.0 2035.9 7000 225.0 2035.9 4458 225.0 2035.9 9285 225.0 2260.9 7000 225.0 2260.9 4458 225.0 2260.9 9285 225.0 2485.9 7000 225.0 2485.9 4458 225.0 2485.9 9285 225.0 2710.9 7000 225.0 2710.9 4458 225.0 2710.9 9285 225.0 2935.8 7000 225.0 2935.8 4458 225.0 2935.8 9285 225.0 3160.8 7000 225.0 3160.8 4458 225.0 3160.8 9285 225.0 3385.8 7000 225.0 3385.8 4458 225.0 3385.8 9285 553.1 3938.9 7000 553.1 3938.9 4458 553.1 3938.9 9285 553.1 4492.0 7000 553.1 4492.0 4458 553.1 4492.0 9285 553.1 5045.0 7000 553.1 5045.0 4458 553.1 5045.0 9285 553.1 5598.1 7000 553.1 5598.1 4458 553.1 5598.1 9285 587.5 6185.6 7000 587.5 6185.6 4458 587.5 6185.6 9285 3280.8 9466.5 9285 3280.8 9466.5 9285 3280.8 9466.5 9285 EA3-7 of 7 Watts Bar Nuclear Plant Site Description The basic information used to create the site geologic profile at the Watts Bar Nuclear Plant is shown in Tables 1A and lB. This profile was developed using information documented in Reference 1. As indicated in Table 1A, the SSE Control Point is at a depth of 64 ft., and the profile was modeled up to this depth. For dynamic properties of soft rock layers, modulus and damping curves were represented with 2 models. The first model used rock curves taken from Reference 2, 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. AMEC (2013). Seismic Data Retrieval Information for EPRI Near Term Task Force Recommendation 2.1 TVA Watts Bar Nuclear Plant Spring City, Tennessee, Letter report, AMEC Proj. 3043121029, Letter from K. Campbell to B. Enis dated June 26, 2013.
- 2. EPRI (1993). Guidelines for Determining Design Basis Ground Motions, Elec. Power Res. Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.
EA4-1 of 10 Table 1A Summary of Geotechnical Profile Data for Watts Bar Nuclear Power Plant Vs for G/Gmax Damping Depth SoillRock Density Measured Analyses Gmax Ratio vs.
(feet)
Description (pcf)
Vs* (fps)
(fAps)
(psf) vs. Shear Shear (p)Strain Strain Strain Ground Surface Elev. 728 In-situ Clays, Silts, FSAR FSAR 0-32 Sand and Gravel-y 120 700- 1,830 1,200 6,500,000 Figure Figure SandandGravel*
2.5-233E 2.5-233F Interbedded 32-64 Shales and 165 4,160-5,000-200,000,000 1
No Change Limestones 8,341 7,000 Deepest Structure 64 Foundation Control Point-SSE GMRS 64 -
Interbedded 180 Shales and 165 8,341 7,000 200,000,000 1
No Change Limestones Note -* The range of shear wave velocities measured in various geophysical tests performed at the site.
- Replaced with engineered backfill for safety related structures.
EA4-2 of 10 Table 1B Summary of Geologic Profile for Watts Bar Nuclear Power Plant Extended to Basement Depth Soil/Rock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range Vs (fps)**
Vs !fps)***
Vs (fps)***
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; C cm - Conasauga 0
diston e, thin-bedded, Middle(Weathered 1460 1168 1825 dicotiuosbeds. Commonly Overburden) weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; C cm - Conasauga 1.8 limestone, thin-bedded, Middle(Weathered 1700 1360 2125 discontinuous beds. Commonly Overburden) weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; 6 cm - Conasauga 2.5 limestone, thin-bedded, Middle(Weathered 600 480 750 discontinuous beds. Commonly Overburden) weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; 6 cm - Conasauga 3.8 limestone, thin-bedded, Middle(Weathered 450 360 565 discontinuous beds. Commonly Overburden) weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; 6 cm - Conasauga 10.8 limestone, thin-bedded, Middle(Weathered 1000 800 1250 discontinuous beds. Commonly Overburden) weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
EA4-3 of 10 Table 1 B (continued)
Depth Soil/Rock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range Vs (fps)**
V (fps)***
Vs (fps)***
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; 6 cm -
33 limestone, thin-bedded, Conasauga 1700 1360 2125 discontinuous beds. Commonly Middle(Weathered weathers to rust colors. Overlying Overburden) soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; C cm -
76 limestone, thin-bedded, Conasauga 2400 1920 3000 discontinuous beds. Commonly Middle weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; C cm -
136 limestone, thin-bedded, 4800 7500 discontinuous beds. Commonly Conasauga 6000 weathers to rust colors. Overlying soil is yellowish brown and commonly contains fragments of shale and siltstone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; limestone, thin-bedded, C cm -
discontinuous beds. Commonly Conasauga 136-weathers to rust colors. Overlying Middle 6000 4800 7500 656 soil is yellowish brown and and commonly contains fragments of C pv - Pumpkin shale and siltstone. Siltstone, Valley Shale greenish-gray, glauconitic, micaceous, very bioturbated, interbedded with fine-grained sandstone and shale.
EA4-4 of 10 Table 1B (continued)
Depth Soil/Rock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range Vs (fps)**
Vs (fps)***
Vs (fps)***
Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with 656-shale and siltstone, reddish-Cr - Rome 1000 brown, olive greenish-gray, light-Formation 7750 6200 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with 1000-shale and siltstone, reddish-Cr-Rome 1400 brown, olive greenish-gray, light-Formation 10,000 8000 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with 1400-shale and siltstone, reddish-Cr-Rome 2350 brown, olive greenish-gray, light-Formation 10,000 6370 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
2350 Kingston Fault Dolomite, light-gray with pinkish streaks and hues, fine-grained, thick-to massive-bedded, laminations; scattered quartz sand grains; limestone, light-gray, 2350-fine-grained; medium-to Oma - Mascot 7000 4460 9285 2700 massive-bedded, thrombolitic, Dolomite silicified gastropods; chert pods, light-gray, red, some oolitic; chert bedded, white and gastropods, and stromatolite. Base defined by chert matrix sandstone float.
EA4-5 of 10 Table 1 B (continued)
Depth Soil/Rock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range Vs (fps)***
Vs (fps)***
Dolomite, light-gray, fine-to coarse-grained, medium-to thick-bedded, rare oolites and scattered quartz sand grains; 2700-dolomite in the upper part is gray Ok - Kingsport 2900 with pink streaks or pinkish hues; Formation 7000 4460 9285 limestone, light-to medium gray, fine-grained, thick-to massive-bedded; base defined by chert, thick-to massive bedded, fine-grained, white, gastropods.
Dolomite, light-gray, tan, fine-to medium-grained, medium-to thick-bedded; chert, light-gray 2900-and white, pods, lenses, beds, Oc-4460 9285 3450 oolitic, dolomoldic, fine-grained; Chepultepec base defined by sandstone float consisting of medium-grained quartz, and ripple laminations.
Dolomite, dark-gray, brownish-gray, medium-to coarse-grained (saccharoidal), medium-to massive-bedded, petroliferous 3450-odor when broken; dolomite, light-Ccr - Copper 4250 gray, fine-to coarse-grained, Ridge Dolomite4460 9285 medium-to thick-bedded; chert, pods, lenses and beds, medium-to coarse-grained oolitic, cryptozoon, gray and white banded.
Limestone, light-to medium-gray, Cmn -
4250-medium-to massive-bedded, Maynardville 9500 6050 9285 4450 dolomite ribbons, fine-grained, Formation oolitic, stylolites, thrombolitic; (Limestone) minor shale, green, thin-bedded.
Shale, gray and greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; limestone, thin-bedded, edgewise conglomerates consisting of dolomitic rip-up Ccl - Conasauga 4450-clasts throughout the middle and Group Lower 7000 4460 9285 6350 upper part of the formation. Lower Undivided part consists of interbedded siltstone, and shale, gray and greenish-gray, thin-bedded, glauconitic, micaceous, commonly bioturbated, a few marine shell fossils found.
EA4-6 of 10 Table 1 B (continued)
Depth Soil/Rock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range VS (fps)**
VS (fps)***
Vs(p)*
6350 Chattanooga Fault Dolomite, light-gray, tan, fine-to medium-grained, medium-to thick-bedded; chert, light-gray Oc-6350-and white, pods, lenses, beds, Oc 7
6450 oolitic, dolomoldic, fine-grained; Chepultepec 7000 4460 9285 base defined by sandstone float consisting of medium-grained quartz, and ripple laminations.
Dolomite, dark-gray, brownish-gray, medium-to coarse-grained (saccharoidal), medium-to massive-bedded, petroliferous 6450-odor when broken; dolomite, light-ecr - Copper 7200 gray, fine-to coarse-grained, Ridge Dolomite 7000 4460 9285 medium-to thick-bedded; chert, pods, lenses and beds, medium-to coarse-grained oolitic, cryptozoon, gray and white banded.
Limestone, light-to medium-gray, Emn -
7200-medium-to massive-bedded, Maynardville 7700 dolomite ribbons, fine-grained, Formation9500 6050 9285 oolitic, stylolites, thrombolitic; (limestone) minor shale, green, thin-bedded.
Shale, predominantly greenish-and brownish-gray, thin-bedded; limestone, thin-bedded, edgewise conglomerates consisting of dolomitic rip-up clasts throughout the formation; limestone in the 7700-lower part is thick-bedded, Cn - Nolichucky 8450 glauconitic, oolitic. A thick-to Shale 7000 4460 9285 massive bedded, light-to medium-gray, oolitic, thrombolitic, and ribboned limestone reef (Cnr) occurs near the middle of the formation, which may contain irregular infillings of dark-gray, granular limestone.
Shale, predominantly gray to greenish-gray, thin-bedded; siltstone, gray, thin-bedded, glauconitic and calcareous; Ccm -
8450-limestone, thin-bedded, Conasauga 7000 4460 9285 9050 discontinuous beds. Commonly Coug 704692 weathers to rust colors. Overlying Group Middle soil is yellowish brown and commonly contains fragments of shale and siltstone.
EA4-7 of 10 Table 1 B (continued)
Depth SoillRock Rock Formation Best Lower Upper (feet)
Description*
Estimate Range Range Vs (fps)**
Vs (ps)***
Vs (fps)***
Siltstone, greenish-gray, 9050-glauconitic, micaceous, very Cpv - Pumpkin bioturbated, interbedded with Valley Shale 7000 4460 9285 9450 fine-grained sandstone and shale.
Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with 9450-shale and siltstone, reddish-Cr-Rome 10,600 brown, olive greenish-gray, light-Formation 10,000 6370 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
10,600 Sequatchie Valley Fault Sandstone, reddish-brown, greenish-gray, light-brown, olive, fine-to medium-grained, thin-to thick-bedded, glauconitic, micaceous; interbedded with 10,600-shale and siltstone, reddish-Cr-Rome 10,950 brown, olive greenish-gray, light-Formation 6370 9285 brown, thin-bedded, micaceous, bioturbated; dolomite and dolomoitic limestone may also be present; thrust fault at base, estimated exposed thickness shown.
>10,950 Basement 12,000 7640 9285
- Note: Rock Descriptions obtained from the Geologic Map of the Decatur Quadrangle, dated 2008, Lemiszki, Kohl, and Sutton.
- Note: For depths of 0-1400 ft, these values were based on SASW testing by Dr. Ken Stokoe. For depths of 1400 ft to basement, these values were inferred based both on the previous SASW testing and collaboration with Ivan Wong from URS, who assisted Dr. Stokoe and AMEC in developing a lognormal average for the best estimate.
- Note: The lower and upper ranges were based on the best estimate, with the upper range constrained not to exceed 9285 fps. For depths of 0-1400 ft, these values were calculated using a certainty of 1.25. For depths of 1400 ft to basement, these values were calculated using a certainty of 1.57.
EA4-8 of 10
Vs profiles for Watts Bar Site Vs (ft/sec) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0
100 200 300______
3-00Profile 1 400 Profile 2
-5 500 SP
-Profile 3
600 700 800 900 1000 Figure 1. Vs profiles for Watts Bar site EA4-9 of 10 Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Watts Bar 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 1700 0
1360 0
2125 6.0 6.0 1700 6.0 6.0 1360 6.0 6.0 2125 6.0 12.0 1700 6.0 12.0 1360 6.0 12.0 2125 8.0 20.0 2400 8.0 20.0 1920 8.0 20.0 3000 12.0 32.0 2400 12.0 32.0 1920 12.0 32.0 3000 10.0 42.0 2400 10.0 42.0 1920 10.0 42.0 3000 8.0 50.0 2400 8.0 50.0 1920 8.0 50.0 3000 12.0 62.0 2400 12.0 62.0 1920 12.0 62.0 3000 10.0 72.0 2400 "10.0 72.0 1920 10.0 72.0 3000 47.9 120.0 6000 47.9 120.0 4800 47.9 120.0 7500 56.0 176.0 6000 56.0 176.0 4800 56.0 176.0 7500 52.0 228.0 6000 52.0 228.0 4800 52.0 228.0 7500 21.9 250.0 6000 21.9 250.0 4800 21.9 250.0 7500 82.1 332.0 6000 82.1 332.0 4800 82.1 332.0 7500 52.0 384.0 6000 52.0 384.0 4800 52.0 384.0 7500 52.0 436.0 6000 52.0 436.0 4800 52.0 436.0 7500 52.0 488.0 6000 52.0 488.0 4800 52.0 488.0 7500 11.9 499.9 6000 11.9 499.9 4800 11.9 499.9 7500 92.1 592.0 6000 145.3 645.3 4800 92.1 592.0 7500 3280.8 3872.9 9285 145.3 790.6 4800 3280.8 3872.9 9285 145.3 936.0 4800 3280.8 4216.8 9285 EA4-10 of 10