ML13256A061
| ML13256A061 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 09/12/2013 |
| From: | Franke J Susquehanna |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| PLA-7077 | |
| Download: ML13256A061 (8) | |
Text
Jon A. Franke Site Vice President PPL Susquehanna, LLC 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.2904 Fax 570.542.1504 jfranke@ pplweb.com SEP 1 2 2013 U.S. Nuclear Regulatory Commission Attn: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 SUSQUEHANNA STEAM ELECTRIC STATION 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 PLA-7077
References:
Docket No. 50-387 and No. 50-388 I.
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 I025287, Seismic Evaluation Guidance: Screening, Prioritization and Implementation Details (SPID)for the Resolution of Fukushima Near-Term Task Force Recommendation 2. I: Seismic
- 4. NEI Letter to NRC, Proposed Path Forwardfor NTTF Recommendation 2.I: Seismic Reevaluations, dated April9, 2013
- 5.
NRC Letter, EPRI Final Report 3002000704, "Seismic Evaluation Guidance: Augmented Approach for the Resolution of Near-Term Task Force Recommendation 2.I: Seismic, " as an Acceptable Alternative to the March 12, 2012, Information Request for Seismic Reevaluations, datecl 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. 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 Document Control Desk PLA-7077 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 April9, 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.
The attachments to this letter contain the requested descriptions of subsurface materials and properties and base case velocity profiles for Susquehanna SES Units 1 and 2. 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 PPL Susquehanna, LLC 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 Mr. John L. Tripoli at 570-542-3100.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on:
q 1 n-1 -z.ot.s J.
Enclosure:
PPL Susquehanna, LLC' s descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1 025287)
Copy: NRC Region I Mr. J. E. Greives, NRC Sr. Resident Inspector Mr. J. A. Whited, NRC Project Manager Mr. L. J. Winker, PA DEP/BRP Document Control Desk PLA-7077
Enclosure to PLA-7077 PPL Susquehanna, LLC's descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1025287)
Enclosure to PLA-7077 Page 1 of 4 PPL Susquehanna, LLC' s descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1 025287)
Susquehanna Steam Electric Station (SSES) Site Description The basic information used to create the site geologic profile at the Susquehanna Steam Electric Station (SSES) is shown in Table A-1. This profile was developed using i:nfonnation documented in Ref. 1 (Note: All references mentioned herein are listed below). As indicated in Ref. 1, the Safe Shutdo\\\\i'll Earthquake (SSE) Control Point can be defined at the base of the reactor foundation, which is at Elevation 640 ft msl; the profile v\\'as modeled up to this elevation. The rock at the site is considered as a linear material l1aving dynamic propertf,es that ar,e independent of strain levels. The sound rock of tl1e Mahantango Fonnation is divided into sub-layers (MF1 through MFS) based on their shear 11vave velocities as shown in Table A-1. The damping value for M!F1 through 1F3 is O *.S percent, and the damping value of MF4 and MF5 is 0. 7 percent, per Ref. 6.
The base-case shear wave velocity profile used to model amplification at the site is shO'\\<VU h1 Figure A-1. Shear wave velocity profiles J>r;ofile 1 and Profile 2 are provided as an indication of possible variability at the site. Note that Profile 2 assmues hard rock conditions up to the surface.
Thicknesses, depths and shear wave velocities corresponding to each profile are shov.rn in Table A-
- 2.
References
- 1. FZ Ares, LLC (FZA), "Subsurface Material Properties and Base Case Velocity Profiles," Project No.13-076, Rev. 0, August 27, 2013, VID No. 1765.
- 2. NRC, 2007, Regulatocy Guide 1.208, A Perforn1ance-Based Approach to Define the Site-Spedfic Earthquake Ground Motion, Nuclear Regulatory Commission, 2007.
- 3. NRC, 2009, Interim Staff Guidance 17 (DC/COL-ISG-017), Interim Staff Guidance on Ensuring Hazard-Consistent Seismic Input for Site Response and Soil Structure Interaction Analyses, Nuclear Regulatory Commission, 2009
- 4. PPL, 2011, Susquehanna Steam Electric Station Units 1 & 2 Final Satiety.ol\\nalysis Report (FSAR)
Rev. 67, S,ection 2.5, P.PL Susquehanna, LLC.
- 5. UuiStar, 2010, Bell Bend Nuclear Power Project Final Safety Analysis Report Rev. 2, Section 2.5, UniStar Nuclear Services, Ll..C.
- 6. UniStar, 2013, Bell Bend Nuclear Power Project Final Safety Analysis Report Rev. 4, Section. 2.5, UuiStar Nuclear Sen'i.ces, LLG.
Enclosure to PLA-7077 Page 2 of 4 PPL Susquehanna, LLC' s descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1 025287)
TABLE A -1, SUMJVlARY OF GEOTECHN1CAL PROFILE DATA FOR SUSQUEHA1'JNA STEAM ELECTR1C STATION ELY1 DEPTH121 yl3l VpcsJ Vs(SJ SSES RECOMMENDED
[ pcf vt3l
[ ft ]
[ ft]
]
[ fps ]
[ fps 1 Glacial overburden soils 670.0 0.0 130 1500 700 0.35 Weat hered rock 655.0 15.0 130 7600 3600 0.35 Mahantango Formation 1 (M F1) 640.0 30.0 170 16000 7500 0.30 Mahantango Formation 2 (MF2) 540.0 130.0 170 15600 7905 0.32 Mahantango Formation 3 (M F3) 445.8 224.2 170 15705 8415 0.30 Mahantango Formation 4 (MF4) 383.3 286.7 170 15755 9050 0.28 Mahantango Formation 5 (MF5) 248.7 421.3 170 16850 9600 0.26 NOTES:
Ill Site grade elevation is taken as 670 ft.
'2l Measured f rom site grade csl SSES FSAR data used for depth less than 130ft; Bell Bend Nuclear Power Plant (BBNPP) interpolated for depth greater than 130 ft
Enclosure to PLA-7077 Page 3 of 4 PPL Susquehanna, LLC' s descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1 025287) 0 0
1-100 1-1-
200 f-
- I:
il-
- 0. 300
- w f-0 400 f-1-
500 600 Shear Wave Velocity [fps]
5000
-Base Profile Profile 1 Profile2 10000 FIGURE A - 1, SHEAR WAVE VELOCITY PRO FILES 0 F SUSQUEHANNA STEAM ELECTRIC STATIO
Enclosure to PLA-7077 Page 4 of 4 PPL Susquehanna, LLC' s descriptions of subsurface materials and properties and base case velocity profiles (items 3a and 3b in Section 4 of EPRI Report 1 025287)
TABLE A -2, LAYER THICKNESS, DEPTH AND SHEAR WAVE VELOCITY FOR 3 PROFILES, SUSQUEHA A STEA.l ELECTRIC STATION Profile 1 Base Profile Profile 2 Thickness Depth Vs Thickness Depth Vs Thickness Depth Vs
[ft)
[ft]
[fps]
[ft]
[ft]
[fps)
[ft]
[ttl
[fps]
0 6124 0
7500 0
9200 12 12 6124 12 12 7500 12 12 9200 12 24 6124 12 24 7500 12 24 9200 12 36 6124 12 36 7500 12 36 9200 12 48 6124 12 48 7500 12 48 9200 12 60 6124 12 60 7500 12 60 9200 12 72 6124 12 72 7500 12 72 9200 12 84 6124 12 84 7500 12 84 9200 12 96 6124 12 96 7500 12 96 9200 4
100 6454 4
100 7905 4
100 9200 12 112 6454 12 112 7905 12 112 9200 12 124 6454 12 124 7905 12 124 9200 12 136 6454 12 136 7905 12 136 9200 12 148 6454 12 148 7905 12 148 9200 12 160 6454 12 160 7905 12 160 9200 12 172 6454 12 172 7905 12 172 9200 12 184 6454 12 184 7905 12 184 9200 10.2 194.2 6871 10.2 194.2 8415 10.2 194.2 9200 13 207.2 6871 13 207.2 8415 13 207.2 9200 13 220.2 6871 13 220.2 8415 13 220.2 9200 13 233.2 6871 13 233.2 8415 13 233.2 9200 13 246.2 6871 13 246.2 8415 13 246.2 9200 10.5 256.7 7389 10.5 256.7 9050 10.5 256.7 9200 15 271.7 7389 15 271.7 9050 15 271.7 9200 15 286.7 7389 15 286.7 9050 15 286.7 9200 15 301.7 7389 15 301.7 9050 15 301.7 9200 15 316.7 7389 15 316.7 9050 15 316.7 9200 15 331.7 7389 15 331.7 9050 15 331.7 9200 15 346.7 7389 15 346.7 9050 15 346.7 9200 15 361.7 7389 15 361.7 9050 15 361.7 9200 15 376.7 7389 15 376.7 9050 15 376.7 9200 14.6 391.3 7838 14.6 391.3 9200 14.6 391.3 9200 15 406.3 7838 15 406.3 9200 15 406.3 9200 15 421.3 7838 15 421.3 9200 15 421.3 9200 15 436.3 7838 15 436.3 9200 15 436.3 9200 15 451.3 7838 15 451.3 9200 15 451.3 9200 15 466.3 7838 15 466.3 9200 15 466.3 9200 15 481.3 7838 15 481.3 9200 15 481.3 9200 15 496.3 7838 15 496.3 9200 15 496.3 9200 3.7 500 9200 15 511.3 9200 15 511.3 9200 15 515 9200 15 526.3 9200 15 526.3 9200 15 530 9200 15 541.3 9200 15 541.3 9200 15 545 9200 15 556.3 9200 15 556.3 9200 15 560 9200 15 571.3 9200 15 571.3 9200 15 575 9200 15 586.3 9200 15 586.3 9200 15 590 9200 15 601.3 9200 15 601.3 9200 15 605 9200 15 616.3 9200 15 616.3 9200 15 620 9200 15 631.3 9200 15 631.3 9200 20 640 9200 8.7 640 9200 8.7 640 9200