RBG-47390, 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
| ML13261A011 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 09/12/2013 |
| From: | Olson E Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RBG-47390 | |
| Download: ML13261A011 (10) | |
Text
En tergy--
Entergy Operations, Inc.
River Bend Station 5485 US. Highway 6d N St. Francisville, LA 70775 Tel 225-381-4374 Eric W. Olson Site Vice President RBG-47390 September 12, 2013 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852
SUBJECT:
Entergy's 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 River Bend Station - Unit 1 Docket No. 50-458 License No. NPF-47
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 (ML12053A340)
- 2. NRC Letter, Endorsement of EPRI Final Draft Report 1025287, "Seismic Evaluation Guidance," dated February 15, 2013 (ML12319A074)
- 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 (ML12333A170)
- 4. NEI Letter to NRC, Proposed Path Forward for NTTF Recommendation 2.1: Seismic Reevaluations, dated April 9, 2013 (ML13101A345)
- 5. NRC Letter, 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 (ML13106A331)
- 6. Entergy letter to NRC, 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, dated April 29, 2013 (RBG-47356)
Aco
RBG-47390 Page 2 of 3
Dear Sir or Madam:
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, 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 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. Reference 6 contained Entergy's commitment to follow the approach described in Reference 4.
The attachment to this letter contains the requested descriptions of subsurface materials and properties and base case velocity profiles for River Bend Station. The information provided in the attachment 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 report for River Bend Station will be provided to the NRC in our seismic hazard submittal by March 31, 2014, in accordance with Reference 5.
This letter contains no new regulatory commitments. Should you have any questions regarding this submittal, please contact Mr. Joseph Clark, Manager-Licensing, at 225-381-4177.
I declare under penalty of perjury that the foregoing is true and correct; executed on September 12, 2013.
Sincerely, EWO/TAE/JAC/wjf
Attachment:
River Bend Station Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles cc:
U.S. Nuclear Regulatory Commission Region IV 1600 East Lamar Blvd.
Arlington, TX 76011-4511
RBG-47390 Page 3 of 3 cc:
(continued)
NRC Resident Inspector R-SB-14 Central Records Clerk Public Utility Commission of Texas 1701 N. Congress Ave.
Austin, TX 78711-3326 Mr. Alan Wang, Project Manager U.S. Nuclear Regulatory Commission MS O-8B1 11555 Rockville Pike Rockville, MD 20852-2738 U. S. Nuclear Regulatory Commission ATTN: Director,. Office of Nuclear Reactor Regulation One White Flint North 11555 Rockville Pike Rockville, MD 20852 U. S. Nuclear Regulatory Commission ATTN: Robert J. Fretz Jr.
Mail Stop OWFN/4A1 5A 11555 Rockville Pike Rockville, MD 20852-2378 U. S. Nuclear Regulatory Commission ATTN: Robert L. Dennig Mail Stop OWFN/10E1 11555 Rockville Pike Rockville, MD 20852-2378 Department of Environmental Quality Office of Environmental Compliance Radiological Emergency Planning and Response Section ATTN: JiYoung Wiley P.O. Box 4312 Baton Rouge, LA 70821-4312 U. S. Nuclear Regulatory Commission ATTN: Ms. Lisa M. Regner Mail Stop OWFN/1 1 F1 11555 Rockville Pike Rockville, MD 20852-2378 U. S. Nuclear Regulatory Commission ATTN: Mr. Blake A. Purnell Mail Stop OWFN/12D20 11555 Rockville Pike Rockville, MD 20852-2378 U. S. Nuclear Regulatory Commission ATTN: Mr. Steven R. Jones Mail Stop OWFN/10A1 11555 Rockville Pike Rockville, MD 20852-2378
Attachment to RBG-47390 River Bend Station Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles
Attachment to RBG-47390 Page 1 of 6 River Bend Station Descriptions of Subsurface Materials and Properties and Base Case Velocity Profiles River Bend Site Description The basic information used to create the site geologic profile at the River Bend Nuclear Power Plant is shown in Tables 1A and 1 B. This profile was developed using information documented in Ref. 1. As indicated in utility communications, the GMRS Control Point is taken to be elevation 65', and the profile was modeled up to this elevation. For dynamic properties of sand, silt, and clay layers, modulus and damping curves were represented with 2 models. The first model used soil curves taken from Ref. 2, the second model used soil curves taken from Ref. 3 and Ref. 4. 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. Entergy (2012). Site Geologic Conditions for River Bend Station Nuclear Power Plant, Informal report transmitted to EPRI in July, 2012.
- 2. EPRI (1993). Guidelines for Determining Design Basis Ground Motions, Elec. Power Res.
Inst., Palo Alto, CA, Rept. TR-1 02293, 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. (ML042800294)
- 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.
Attachment to RBG-47390 Page 2 of 6 Table IA Geotechnical Profile 1 for River Bend Site Elevation, Soil
- Density, "P" wave "S" wave Poisson's (ft. above
- velocity, velocity, Raio msl)
Description Lblcu ft.
(ft/sec)
(ftlsec)
Ratio 108 to 100 Loess 130 1100 Port Hickey 100 to 90 Top Stratum 130 2000 Silts and Clays 90 to 40 5500 (water table Sands and 130 (values 1000 0.483 at el 57)
Clayey Sands measured at el 48)
Citronelle Sands 40 to 20 and Gravelly 130 5600 1050 0.482 Sands Citronelle Buried 20 to -40 Channel Deposits 130 5970 1170 0.480 Sands and Gravelly Sands
-40 to -102 Pascagoula 130 5970 1220 0.478 Clays FROM: USAR Table 2.5-11, Summary of Average Velocity and Moduli Data Geologic Zones for Borings 113, 135, 136, 137, 138, and 109 Corresponding to
Attachment to RBG-47390 Page 3 of 6 Table I B Geotechnical Profile 2 for River Bend Site Elevation, Soil
- Density, "P" wave "S" wave Poisson's (ft. above Description Lblcu
- velocity, velocity, Ratio msl)
Decitobc (ft/sec)
(ft/sec) 108 to 100 Loess 130 1400 Port Hickey 100 to 90 Top Stratum 130 2000 Silts and Clays 90 to 39 5500 (water table Sands and 130 (values 1050 0.481 at el 57)
Clayey Sands measured at el 49)
Citronelle Sands 39 to 20 and Gravelly 130 5750 1050 0.483 Sands Citronelle Buried 20 to -40 Channel 130 6080 1170 0.481 Deposits Sands and Gravelly Sands
-40 to -91 Pascagoula 130 5970 1125 0.482 Clays FROM: USAR Table 2.5-12, Summary of Average Velocity and Moduli Data Corresponding to Geologic Zones for Borings 280, 251, 252, 253, and 254
Attachment to RBG-47390 Page 4 of 6 Figure 1 Vs Profiles for River Bend Site Vs profiles for River Bend Site Vs (ft/sec) 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0
0 500 1000 1500
~.2000 2500 3000 3500 4000 4500
_I Profile 1 Profile 2
-Profile 3
Attachment to RBG-47390 Page 5 of 6 Table 2 Layer Thicknesses, Depths, and Vs for 3 Profiles, River Bend Site Profile 1.
Profile 2K Profile 3 thickness(ft) depth (if)
Vs(ft/S) thickness(ft) depth (if)
Vs(ft/s) thickness(ft):
depth::(if)
Vs(ft/s) 0 1000 0
800 0
1250 5.0 5.0 1000 5.0 5.0 800 5.0 5.0 1250 10.0 15.0 1000 10.0 15.0 800 10.0 15.0 1250 5.0 20.0 1000 5.0 20.0 800 5.0 20.0 1250 5.0 25.0 1000 5.0 25.0 800 5.0 25.0 1250 10.0 35.0 1050 10.0 35.0 840 10.0 35.0 1312 10.0 45.0 1050 10.0 45.0 840 10.0 45.0 1312 5.0 50.0 1170 5.0 50.0 936 5.0 50.0 1462 15.0 65.0 1170 15.0 65.0 936 15.0 65.0 1462 10.0 75.0 1170 10.0 75.0 936 10.0 75.0 1462 10.0 85.0 1170 10.0 85.0 936 10.0 85.0 1462 10.0 95.0 1170 10.0 95.0 936 10.0 95.0 1462 10.0 105.0 1170 10.0 105.0 936 10.0 105.0 1462 10.3 115.3 1220 10.3 115.3 976 10.3 115.3 1525 4.7 120.0 1220 4.7 120.0 976 4.7 120.0 1525 16.0 136.0 1220 16.0 136.0 976 16.0 136.0 1525 10.3 146.3 1220 10.3 146.3 976 10.3 146.3 1525 10.3 156.6 1220 10.3 156.6 976 10.3 156.6 1525 10.3 167.0 1220 10.3 167.0 976 10.3 167.0 1525 13.1 180.1 1299 13.1 180.1 902 13.1 180.1 2040 13.1 193.2 1299 13.1 193.2 902 13.1 193.2 2040 13.1 206.3 1299 13.1 206.3 902 13.1 206.3 2040 13.1 219.5 1299 13.1 219.5 902 13.1 219.5 2040 13.1 232.6 1299 13.1 232.6 902 13.1 232.6 2040 13.1 245.7 1401 13.1 245.7
.897 13.1 245.7 2199 4.3 250.0 1401 4.3 250.0 897 4.3 250.0 2199 22.0 272.0 1401 22.0 272.0 897 22.0 272.0 2199 13.1 285.1 1401 13.1 285.1 897 13.1 285.1 2199 13.1 298.2 1401 13.1 298.2 897 13.1 298.2 2199 13.1 311.3 1499 13.1 311.3 960 13.1 311.3 2354 13.1 324.5 1499 13.1 324.5 960 13.1 324.5 2354 13.1 337.6 1499 13.1 337.6 960 13.1 337.6 2354 13.1 350.7 1499 13.1 350.7 960 13.1 350.7 2354 13.1 363.8 1499 13.1 363.8 960 13.1 363.8 2354 22.0 385.9 1670 22.0 385.9 1069 22.0 385.9 2622 22.0 407.9 1700 22.0 407.9 1088 22.0 407.9 2669 22.9 430.8 1740 22.9 430.8 1114 22.9 430.8 2732 22.9 453.8 1780 22.9 453.8 1139 22.9 453.8 2795
Attachment to RBG-47390 Page 6 of 6 Table-2 (continued)
Profile 1 Profile 2 Profile 3 thickness(ft) depth (ft)
Vs(ft/s) thickness(ft) depth (ft)
Vs(ft/s) thickness(ft)
- depth (ft)
Vs(ft/s) 22.9 476.7 1820 22.9 476.7 1165 22.9 476.7 2857 14.8 491.5 1850 14.8 491.5 1184 14.8 491.5 2905 8.5 500.0 1950 8.5 500.0 1248 8.5 500.0 3062 58.4 558.4 1950 58.4 558.4 1248 58.4 558.4 3062 33.3 591.7 1950 33.3 591.7 1248 33.3 591.7 3062 33.3 625.0 2050 33.3 625.0 1312 33.3 625.0 3219 33.3 658.4 2050 33.3 658.4 1312 33.3 658.4 3219 33.3 691.7 2050 33.3 691.7 1312 33.3 691.7 3219 33.3 725.0 2150 33.3 725.0 1376 33.3 725.0 3376 33.3 758.4 2150 33.3 758.4 1376 33.3 758.4 3376 33.3 791.7 2150 33.3 791.7 1376 33.3 791.7 3376 33.3 825.0 2250 33.3 825.0 1440 33.3 825.0 3533 33.3 858.4 2250 33.3 858.4 1440 33.3 858.4 3533 33.3 891.7 2250 33.3 891.7 1440 33.3 891.7 3533 33.3 925.0 2350 33.3 925.0 1504 33.3 925.0 3690 33.3 958.4 2350 33.3 958.4 1504 33.3 958.4 3690 33.3 991.7 2350 33.3 991.7 1504 33.3 991.7 3690 65.6 1057.3 2359 65.6 1057.3 1510 65.6 1057.3 3704 65.6 1122.9 2359 65.6 1122.9 1510 65.6 1122.9 3704 65.6 1188.6 2359 65.6 1188.6 1510 65.6 1188.6 3704 65.6 1254.2 2359 65.6 1254.2 1510 65.6 1254.2 3704 65.6 1319.8 2359 65.6 1319.8 1510 65.6 1319.8 3704 131.2 1451.0 2552 131.2 1451.0 1634 131.2 1451.0 4007 131.2 1582.3 2552 131.2 1582.3 1634 131.2 1582.3 4007 131.2 1713.5 2552 131.2 1713.5 1634 131.2 1713.5 4007 131.2 1844.7 2552 131.2 1844.7 1634 131.2 1844.7 4007 131.2 1976.0 2552 131.2 1976.0 1634 131.2 1976.0 4007 131.2 2107.2 2871 131.2 2107.2 1837 131.2 2107.2 4507 131.2 2238.4 2871 131.2 2238.4 1837 131.2 2238.4 4507 131.2 2369.7 2871 131.2 2369.7 1837 131.2 2369.7 4507 131.2 2500.9 2871 131.2 2500.9 1837 131.2 2500.9 4507 131.2 2632.1 2871 131.2 2632.1 1837 131.2 2632.1 4507 164.0 2796.2 3054 164.0 2796.2 1955 164.0 2796.2 4795 164.0 2960.2 3054 164.0 2960.2 1955 164.0 2960.2 4795 164.0 3124.3 3054 164.0 3124.3 1955 164.0 3124.3 4795 164.0 3288.3 3054 164.0 3288.3 1955 164.0 3288.3 4795 164.0 3452.3 3054 164.0 3452.3 1955 164.0 3452.3 4795 552.5 4004.8 3054 552.5 4004.8 1955 552.5 4004.8 4795 3280.8 7285.7 9285 3280.8 7285.7 9285 3280.8 7285.7 9285