CP-201301109, 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 Sit

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

ML13267A167
Person / Time
Site:	Comanche Peak
Issue date:	09/12/2013
From:	Flores R Luminant Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CP-201301109, TXX-13138
Download: ML13267A167 (8)

Text

Rafael Flores Luminant Power Senior Vice President P 0 Box 1002

& Chief Nuclear Officer 6322 North FM 56 rafael.flores@luminant.com Glen Rose, TX 76043 Luminant T 254 897 5590 C 817 559 0403 F 254 897 6652 CP-201301109 REF 10 CFR 50.54(f)

Log # TXX-13138 September 12, 2013 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001

SUBJECT:

Comanche Peak Nuclear Power Plant, Docket Nos. 50-445 and 50-446, 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

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 Reconmmendation 2.1: Seismic

4. NEI Letter to NRC, Proposed Path Forward for NTTF Recommendation 2.1:

Seismic Reevaluations, dated April 9, 2013

5. NRC Letter, EPRI Final Draft Report, "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

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. 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 (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 A member of the STARS Alliance Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• San Onofre

• South Texas Project

• Wolf Creek Ac~i

U. S. Nuclear Regulatory Commission TXX-13138 Page 2 of 2 09/12/2013 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 attachment to this letter contains the requested descriptions of subsurface materials and properties and base case velocity profiles for CPNPP Units 1 and 2. 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 reports for CPNPP Units 1 and 2 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 Carl B. Corbin at 254-897-0121 or carl.corbin@luminant.com.

I state under penalty of perjury that the foregoing is true and correct.

Executed on September 12, 2013.

Sincerely, Luminant Generation Company LLC Rafael Flores By: 6LI1)QOIL B Fred W. Madden Director, Oversight & Regulatory Affairs

Attachment:

CPNPP Description of Subsurface Materials and Properties and Base Case Velocity Profiles c- Eric J. Leeds, Director, Office of Nuclear Reactor Regulation Steven A. Reynolds, Region IV Jessica A. Kratchman, NRR/JLD/PMB Balwant K. Singal, NRR Resident Inspectors, Comanche Peak

Attachment to TXX-13138 CPNPP Description of Subsurface Materials and Page 1 of 6 Properties and Base Case Velocity Profiles Comanche Peak Nuclear Power Plant (CPNPP) site description The basic information used to create the site geologic profile at the Comanche Peak Nuclear Power Plant is shown in Table 1. This profile was developed using information documented in Ref. 1. As indicated in Table 1, the SSE Control Point is defined at the surface, and the profile was modeled up to the surface. For dynamic properties of soft rock layers, modulus and damping curves were represented with 2 models.

The first model used rock curves taken from Ref. 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. Luminant (2012). Site Geologic Conditionsfor Comanche Peak Nuclear Power Plant, Informal report transmitted to EPRI in October, 2012.

2. EPRI (1993). Guidelinesfor Determining Design Basis Ground Motions, Elec. Power Res. Inst., Palo Alto, CA, Rept. TR-102293, Vol. 1-5.

Attachment to TXX-13138 CPNPP Description of Subsurface Materials and Page 2 of 6 Properties and Base Case Velocity Profiles Table 1 Site Geotechnical Profile for Comanche Peak Nuclear Power Plant Depth Soil I Rock Description Density Shear Wave Compression Poisson's Range (pcf) Velocity (fps) Wave Velocity Ratio (feet) (fps) 0 SSE control point (at surface) ---.........

0-65 Early Cretaceous limestone 155 5,685 11,324 0.33 65-68 Early Cretaceous shale 135 3,019 8,312 0.42 68-92 Early Cretaceous limestone 155 4,943 1.0,486 0.36 92-126 Early Cretaceous limestone 155 6,880 13,164 0.31 126-160 Early Cretaceous limestone 150 4,042 9,255 0.38 160-189 Early Cretaceous limestone with 130 3,061 7,927 0.41 interbedded shales, sand 189-269 Early Cretaceous sandstone 135 3,290 7,593 0.38 269-331 Early Cretaceous shale 140 3,429 8,188 0.39 331-393 Early Cretaceous sandstone 145 3,092 7,686 0.40 393-2,595 Pennsylvanian shales with 150 5,546 10,627 0.32 sandstone and limestone beds 2,595- Pennsylvanian Atoka Group 150 7,642 13,921 0.28

-4,500 sands

-4,500- Mississippian and Pennsylvanian 150 10,520 19,740 0.30

-5,000 limestone (Marble Falls)

-5,000- Mississippian Barnett Shale 150 7,783 12,858 0.21

-5,300

-5,300- Late Cambrian to Early Ordovian 150 10,906 20,382 0.30

>8,300 limestone and dolomite (Ellenburger) 25' to 200' Late Cambrian to Early Ordovian --- ---.....

thick limestone, clastic, conglomerate and siltstone 175' to Late Cambrian to Ordovian --- --- ---

500' thick limestone, sandstone, shale and siltstone

-9,000 Precambrian undifferentiated --- --- ---

Grenville crystalline basement NOTES: Embedment depth for containment buildings is 13.5 feet below plant grade, at top of Early Cretaceous limestone.

Attachment to TXX- 13138 CPNPP Description of Subsurface MateriaLs and Page 3 of 6 Properties and Base Case Vetocity Profites Vs profiles for Comanche Peak Site Vs (ft/sec) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0

500 1000 1500 2000

-Profile 1 2500

-Profile 2 E3000

-Profile 3 C 3500 4000 4500 5000 5500 6000 6500 Figure 1. Vs profiles for Comanche Peak site

Attachment to TXX-13138 CPNPP Description of Subsurface Materials and Page 4 of 6 Properties and Base Case Velocity Profiles Table 2 Layer thicknesses, depths, and Vs for 3 profiles, Comanche Peak Nuclear Power Plant site 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) 0 5685 0 4548 0 7106 5.0 5.0 5685 5.0 5.0 4548 5.0 5.0 7106 5.0 10.0 5685 5.0 10.0 4548 5.0 10.0 7106 5.0 15.0 5685 5.0 15.0 4548 5.0 15.0 7106 5.0 20.0 5685 5.0 20.0 4548 5.0 20.0 7106 5.0 25.0 5685 5.0 25.0 4548 5.0 25.0 7106 5.0 30.0 5685 5.0 30.0 4548 5.0 30.0 7106 5.0 35.0 5685 5.0 35.0 4548 5.0 35.0 7106 5.0 40.0 5685 5.0 40.0 4548 5.0 40.0 7106 5.0 45.0 5685 5.0 45.0 4548 5.0 45.0 7106 5.0 50.0 5685 5.0 50.0 4548 5.0 50.0 7106 5.0 55.0 5685 5.0 55.0 4548 5.0 55.0 7106 5.0 60.0 5685 5.0 60.0 4548 5.0 60.0 7106 5.0 65.0 5685 5.0 65.0 4548 5.0 65.0 7106 3.0 68.0 3019 3.0 68.0 2415 3.0 68.0 3774 6.0 74.0 4943 6.0 74.0 3954 6.0 74.0 6178 6.0 80.0 4943 6.0 80.0 3954 6.0 80.0 6178 6.0 86.0 4943 6.0 86.0 3954 6.0 86.0 6178 6.0 92.0 4943 6.0 92.0 3954 6.0 92.0 6178 7.0 99.0 6880 7.0 99.0 5504 7.0 99.0 8600 7.0 106.0 6880 7.0 106.0 5504 7.0 106.0 8600 7.0 113.0 6880 7.0 113.0 5504 7.0 113.0 8600 7.0 120.0 6880 7.0 120.0 5504 7.0 120.0 8600 6.0 126.0 6880 6.0 126.0 5504 6.0 126.0 8600 4.0 130.0 4042 4.0 130.0 3233 4.0 130.0 5052 5.0 135.0 4042 5.0 135.0 3233 5.0 135.0 5052 5.0 140.0 4042 5.0 140.0 3233 5.0 140.0 5052 5.0 145.0 4042 5.0 145.0 3233 5.0 145.0 5052 5.0 150.0 4042 5.0 150.0 3233 5.0 150.0 5052 5.0 155.0 4042 5.0 155.0 3233 5.0 155.0 5052 5.0 160.0 4042 5.0 160.0 3233 5.0 160.0 5052 4.0 164.0 3061 4.0 164.0 2449 4.0 164.0 3826 5.0 169.0 3061 5.0 169.0 2449 5.0 169.0 3826 5.0 174.0 3061 5.0 174.0 2449 5.0 174.0 3826 5.0 179.0 3061 5.0 179.0 2449 5.0 179.0 3826 5.0 184.0 3061 5.0 184.0 2449 5.0 184.0 3826 5.0 189.0 3061 5.0 189.0 2449 5.0 189.0 3826 5.0 194.0 3290 5.0 194.0 2632 5.0 194.0 4112 5.0 199.0 3290 5.0 199.0 2632 5.0 199.0 4112

Attachment to TXX- 13138 CPNPP Description of Subsurface Materials and Page 5 of 6 Properties and Base Case Velocity Profiles 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) 5.0 204.0 3290 5.0 204.0 2632 5.0 204.0 4112 5.0 209.0 3290 5.0 209.0 2632 5.0 209.0 4112 5.0 214.0 3290 5.0 214.0 2632 5.0 214.0 4112 5.0 219.0 3290 5.0 219.0 2632 5.0 219.0 4112 5.0 224.0 3290 5.0 224.0 2632 5.0 224.0 4112 5.0 229.0 3290 5.0 229.0 2632 5.0 229.0 4112 5.0 234.0 3290 5.0 234.0 2632 5.0 234.0 4112 5.0 239.0 3290 5.0 239.0 2632 5.0 239.0 4112 5.0 244.0 3290 5.0 244.0 2632 5.0 244.0 4112 6.0 250.0 3290 6.0 250.0 2632 6.0 250.0 4112 6.3 256.3 3290 6.3 256.3 2632 6.3 256.3 4112 6.3 262.7 3290 6.3 262.7 2632 6.3 262.7 4112 6.3 269.0 3290 6.3 269.0 2632 6.3 269.0 4112 10.0 279.0 3429 10.0 279.0 2743 10.0 279.0 4286 10.0 289.0 3429 10.0 289.0 2743 10.0 289.0 4286 10.0 299.0 3429 10.0 299.0 2743 10.0 299.0 4286 10.0 309.0 3429 10.0 309.0 2743 10.0 309.0 4286 10.0 319.0 3429 10.0 319.0 2743 10.0 319.0 4286 12.0 331.0 3429 12.0 331.0 2743 12.0 331.0 4286 10.0 341.0 3092 10.0 341.0 2473 10.0 341.0 3865 10.0 351.0 3092 10.0 351.0 2473 10.0 351.0 3865 10.0 361.0 3092 10.0 361.0 2473 10.0 361.0 3865 10.0 371.0 3092 10.0 371.0 2473 10.0 371.0 3865 10.0 381.0 3092 10.0 381.0 2473 10.0 381.0 3865 12.0 393.0 3092 12.0 393.0 2473 12.0 393.0 3865 7.0 400.0 5546 7.0 400.0 3549 7.0 400.0 8707 10.0 410.0 5546 10.0 410.0 3549 10.0 410.0 8707 10.0 420.0 5546 10.0 420.0 3549 10.0 420.0 8707 10.0 430.0 5546 10.0 430.0 3549 10.0 430.0 8707 10.0 440.0 5546 10.0 440.0 3549 10.0 440.0 8707 10.0 450.0 5546 10.0 450.0 3549 10.0 450.0 8707 10.0 460.0 5546 10.0 460.0 3549 10.0 460.0 8707 10.0 470.0 5546 10.0 470.0 3549 10.0 470.0 8707 10.0 480.0 5546 10.0 480.0 3549 10.0 480.0 8707 10.0 490.0 5546 10.0 490.0 3549 10.0 490.0 8707 10.0 500.0 5546 10.0 500.0 3549 10.0 500.0 8707 314.2 814.2 5546 314.2 814.2 3549 314.2 814.2 8707 314.2 1128.4 5546 314.2 1128.4 3549 314.2 1128.4 8707 314.2 1442.7 5546 314.2 1442.7 3549 314.2 1442.7 8707 314.2 1756.9 5546 314.2 1756.9 3549 314.2 1756.9 8707 314.2 2071.1 5546 314.2 2071.1 3549 314.2 2071.1 8707

Attachment to TXX-13138 CPNPP Description of Subsurface Materials and Page 6 of 6 Properties and Base Case Velocity Profiles Profile I 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) 314.2 2385.4 5546 314.2 2385.4 3549 314.2 2385.4 8707 209.5 2594.9 5546 209.5 2594.9 3549 209.5 2594.9 8707 405.7 3000.6 7642 405.7 3000.6 4867 405.7 3000.6 9285 405.7 3406.3 7642 405.7 3406.3 4867 405.7 3406.3 9285 405.7 3812.0 7642 405.7 3812.0 4867 405.7 3812.0 9285 405.7 4217.8 7642 405.7 4217.8 4867 405.7 4217.8 9285 281.9 4499.7 7642 281.9 4499.7 4867 281.9 4499.7 9285 500.0 4999.7 9285 500.0 4999.7 5914 500.0 4999.7 9285 300.7 5300.4 7782 300.7 5300.4 4957 300.7 5300.4 9285 3280.8 8581.2 9285 3280.8 8581.2 9285 3280.8 8581.2 9285