ML14162A440

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Salem Generating Station, Near-term Task Force Recommendation 2.1 Seismic Hazard Evaluation, Public Meeting Presentation Slides
ML14162A440
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Site: Salem  PSEG icon.png
Issue date: 06/12/2014
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Office of Nuclear Reactor Regulation
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Download: ML14162A440 (23)
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Text

Near-term Task Force Recommendation 2 2.1 1 Seismic Hazard Evaluation Salem Nuclear Generating g Station June 12, 2014

References for Todays Meeting

  • M ti FFeedback Meeting db k FForm ((requestt ffrom njd2@nrc.gov) jd2@ )
  • May 9, 2014, NRC letter regarding Seismic Screening and Prioritization Results for CEUS Licensees (ML14111A147)
  • May 21, 2014, NRC memo providing preliminary staff ground motion response spectra for CEUS Licensees (ML14136A126)
  • Meeting Summary to be issued within 30-day

Meeting Introduction

Purpose:

support information exchange and begin dialog to have common understanding d di off the h causes off the h primary i diff differences between the preliminary NRC and licensee seismic hazard results

Background:

NRC and Licensee seismic hazard require resolution to support a final seismic screening decision and to support related follow-on submittals Outcomes:

  • Begin NRC and licensee resolution to support regulatory decisions and development of seismic risk evaluations, as appropriate
  • Establish resolution path, including timelines and identification of potential information needs

Look-ahead:

Potentiall Next Steps

  • NRC will consider the meeting information
  • Potential paths:

- Licensee Li submits b it supplemental l t l iinformation f ti bbased d

on public meeting dialog

- NRC staff issues a request for information

- Licensee sends a revision or supplement to the seismic hazard report

  • NRC completes screening review and issues th fi the finall screening i d determination t i ti lletter tt

Salem Generating Station (SGS)

Stephanie Devlin Office of New Reactors June 12, 2014

6 NRCs Seismic Screening and Prioritization Results 7

Modified from ML14111A147

References Reviewed by NRC

R i i 23 Revision

  • Hope Creek Generating Station UFSAR, Revision 0
  • PSEG Nuclear Early Site Permit Application, Site Safety Analysis Report, Revision 3
  • EPRI (2008) Assessment of Seismic Hazard at 34 U.S. Nuclear Plant Sites, Elec. Power Res.

Inst., Report 1016736.

  • EPRI (2013) Seismic Evaluation Guidance: Screening, Prioritization and Implementation Details (SPID) for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1:

Seismic Report 1025287 Seismic,

  • Salem, Unit 1 & 2, 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 - Base Case Velocity Profiles With S

Supporting ti Subsurface S b f M Materials t i l and dPProperties, ti SSeptember t b 10 10, 2013 (ML13253A391)

  • Salem, Units 1 & 2 - PSEG Nuclear LLC's Seismic Hazard and Screening Report (CEUS Sites)

Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - Salem Generating Station (ML14090A043) 8

Stratigraphy control point Source: ML14090A043 and PSEG ESP SSAR Rev3 9

NRC & Licensees Velocity Profiles The licensee used ln to calculate its Profile 2 and 3. It used 0.25 to calculate shear-wave velocities above the Potomac Formation (~444 ft depth) and 0.35 for the Potomac formation and below. 10 Source: ML14090A043 and PSEG ESP SSAR Rev3

Velocities & Uncertainties NRC Thickness (ft) Vs (ft/s) Unit Weight (lb/ft3) Sigma (ln Vs) Sigma (ln Bedrock Depth) 92 2250 121 0.25 (to 50 ft), 0.15 below -

18 3920 131 0.15 -

22 2490 131 0.15 -

33 9 33.9 3020 131 0 15 0.15 -

Licensee i 61.8 83.5 26.1 24.9 2490 1710 2290 1780 128 125 130 130 0.15 0.15 0.15 0.15 81.9 2490 130 0.15 -

365 2200 00 135 35 0.15 0 5 -

430 2630 135 0.15 -

450 3060 135 0.15 -

Bedrock 9285 165 - -

11 Source: ML14090A043 and PSEG ESP SSAR Rev3

Velocities & Non-Linear Properties Thickness (ft) Vs (ft/s) G/Gmax Curve Damping Curve Kappa 84.5 2250 EPRI Soil (1993) EPRI Soil (1993) -

18.5 3920 EPRI Soil (1993) EPRI Soil (1993) -

21.5 2490 EPRI Soil (1993) EPRI Soil (1993) -

34.5 3020 EPRI Soil (1993) EPRI Soil (1993) -

62 2490 EPRI Soil (1993) EPRI Soil (1993) -

NRC 84 26 25 82 365 1710 2290 1780 2490 2200 EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993)

EPRI Soil (1993) 430 2630 None - Linear None - Linear 0.00197 450 3060 None - Linear None - Linear 0.001773 Bedrock 9200 - 0.50% 0.006 NRC's Source PSEG ESP SSAR PSEG ESP SSAR NRC's PSEG Confirmatory Analysis NRC's PSEG Confirmatory Analysis EPRI SPID (2013)

Material Thickness (ft) Vs (ft/s) G/Gmax Curve Damping Curve Kappa 92 2250 EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range 18 3920 EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range 22 2490 EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range 33.9 3020 EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range Licensee 61.8 83.5 26.1 24.9 81.9 2490 1710 2290 1780 2490 EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range EPRI Soil (1993) & Peninsular Range (ms) = 0.0605*H

= 0.031 365 2200 None - Linear 430 2630 N None - Linear Li 450 3060 None - Linear Bedrock 9285 0.006 12 Source: ML14090A043, ML13253A391, and PSEG ESP SSAR Rev3

Damping

  • Represented layer damping using EPRI Soil (1993) curves for units from the control point down to ~800 ft NRC
  • depth depth.

Kappa estimates represent low-strain damping for units below ~803 ft depth. Kappa was calculated utilizing the relationship between Vs, Vs Q Q, and kappa.

kappa

  • Total effective site kappa (damping curves + kappa below 803 ft) is 0.015.
  • Represented layer damping using two alternative curves EPRI Soil (1993) and Peninsular Range curves for units from the control point down to ~444 ft depth.

Li Licensee

  • In addition, kappa estimates, representing low-strain damping, was calculated using SPID equation:
  • In ML14090A043, licensee l stated d totall site kkappa off 0.037 (near the SPID 0.040 limit) for each velocity 13 profile.

Source: ML14090A043, ML13253A391, and PSEG ESP SSAR Rev3

Velocities & Damping NRC Thickness (ft) Vs (ft/s) Damping Curve Estimated Kappa 84 5 84.5 2250 EPRI Soil S il (1993) = 0 000854 0.000854 18.5 3920 EPRI Soil (1993) = 0.000094 21.5 2490 EPRI Soil (1993) = 0.000149 34.5 3020 EPRI Soil (1993) = 0.000197 62 2490 EPRI Soill ((1993)) = 0.000389 84 1710 EPRI Soil (1993) = 0.000768 0.008731 26 2290 EPRI Soil (1993) = 0.000177 25 1780 EPRI Soil (1993) = 0.000219 82 2490 EPRI Soil (1993) = 0.000515 365 2200 EPRI Soil (1993) = 0.001627 430 2630 None - Linear 0.001970 450 3060 None - Linear 0.001772 Bedrock 9200 0.50% 0.006000 0.014731 total effective site kappa 14 Source: ML14090A043, ML13253A391, and PSEG ESP SSAR Rev3

Velocities & Damping Licensee Thickness (ft) Vs (ft/s) Damping Curve M1 (0.5 weight) Kappa M1 (0.5 weight) Damping Curve M2 (0.5 weight) Kappa M2 (0.5 weight) Kappa 92 2250 EPRI Soil (1993) = 0.000818 Peninsular Range = 0.000870 18 3920 EPRI Soil (1993) = 0.000092 Peninsular Range = 0.000055 22 2490 EPRI Soil (1993) = 0.000152 Peninsular Range = 0.000106 33 9 33.9 3020 EPRI Soil (1993) = 0 000194 0.000194 Peninsular Range = 0 000135 0.000135 61.8 2490 EPRI Soil (1993) = 0.000428 Peninsular Range = 0.000299 83.5 1710 EPRI Soil (1993) = 0.000763 Peninsular Range = 0.000588 (ms) = 0.0605*H 26.1 2290 EPRI Soil (1993) = 0.000178 Peninsular Range = 0.000137 = 0.031 24.9 1780 EPRI Soil (1993) = 0.000219 Peninsular Range = 0.000169 81.9 2490 EPRI Soil (1993) = 0.000514 Peninsular Range = 0.000396 365 2200 total = 0 0.003357 003357 total = 0 0.002756 002756 430 2630 450 3060 Bedrock 9285 0.006 15 Source: ML14090A043, ML13253A391, and PSEG ESP SSAR Rev3

Velocities & Damping Licensee Thickness (ft) Vs (ft/s) Damping Curve M1 (0.5 weight) Kappa M1 (0.5 weight) Damping Curve M2 (0.5 weight) Kappa M2 (0.5 weight) Kappa 92 2250 EPRI Soil (1993) = 0.000818 Peninsular Range = 0.000870 18 3920 EPRI Soil (1993) = 0.000092 Peninsular Range = 0.000055 22 2490 EPRI Soil (1993) = 0.000152 Peninsular Range = 0.000106 33 9 33.9 3020 EPRI Soil (1993) = 0 000194 0.000194 Peninsular Range = 0 000135 0.000135 61.8 2490 EPRI Soil (1993) = 0.000428 Peninsular Range = 0.000299 83.5 1710 EPRI Soil (1993) = 0.000763 Peninsular Range = 0.000588 (ms) = 0.0605*H 26.1 2290 EPRI Soil (1993) = 0.000178 Peninsular Range = 0.000137 = 0.031 24.9 1780 EPRI Soil (1993) = 0.000219 Peninsular Range = 0.000169 81.9 2490 EPRI Soil (1993) = 0.000514 Peninsular Range = 0.000396 365 2200 total = 0 0.003357 003357 total = 0 0.002756 002756 430 2630 450 3060 Bedrock 9285 0.006 TOTAL SITE KAPPA = (0.003357*0.5) + (0.002756*0.5) + 0.031 + 0.006 = 0.040 16 Source: ML14090A043, ML13253A391, and PSEG ESP SSAR Rev3

NRCs GMRS Sensitivity Studies d

Thickness (ft) Vs (ft/s) Damping Curve 84.5 2250 EPRI Soil (1993) & Peninsular Range 18 5 18.5 3920 EPRI Soil S il (1993) & P Peninsular i l R Range 21.5 2490 EPRI Soil (1993) & Peninsular Range 34.5 3020 EPRI Soil (1993) & Peninsular Range 62 2490 EPRI Soil (1993) & Peninsular Range 84 1710 EPRI Soil (1993) & Peninsular Range 26 2290 EPRI Soil (1993) & Peninsular Range 25 1780 EPRI Soil S il (1993) & P Peninsular i l R Range 82 2490 EPRI Soil (1993) & Peninsular Range 365 2200 430 2630 (ms) = 0.0605*H = 0.022 450 3060 Bedrock 9200 17

NRCs GMRS Sensitivity Studies d

Thickness (ft) Vs (ft/s) Damping Curve 92 2250 EPRI Soil (1993) & Peninsular Range 18 3920 EPRI Soil (1993) & Peninsular Range 22 2490 EPRI Soil (1993) & Peninsular Range 33.9 3020 EPRI Soil (1993) & Peninsular Range 61.8 2490 EPRI Soil (1993) & Peninsular Range 83.5 1710 EPRI Soil (1993) & Peninsular Range 26.1 2290 EPRI Soil (1993) & Peninsular Range 24.9 1780 EPRI Soil (1993) & Peninsular Range 81.9 2490 EPRI Soil (1993) & Peninsular Range 365 2200 430 2630 (ms) = 0.0605*H = 0.022 450 3060 Bedrock 9285 18

NRCs GMRS Sensitivity Studies d

Thickness (ft) Vs (ft/s) Damping Curve 92 2250 EPRI Soil (1993) & Peninsular Range 18 3920 EPRI Soil (1993) & Peninsular Range 22 2490 EPRI Soil (1993) & Peninsular Range 33.9 3020 EPRI Soil (1993) & Peninsular Range 61.8 2490 EPRI Soil (1993) & Peninsular Range 83.5 1710 EPRI Soil (1993) & Peninsular Range 26.1 2290 EPRI Soil (1993) & Peninsular Range 24 9 24.9 1780 EPRI Soil (1993) & Peninsular Range 81.9 2490 EPRI Soil (1993) & Peninsular Range 365 2200 430 2630 (ms) = 0.0605*H = 0.022 450 3060 Bedrock 9285 19

NRCs GMRS Sensitivity Studies d Thickness (ft) Vs (ft/s) Damping Curve Kappa 92 2250 EPRI Soil (1993) & Peninsular Range 18 3920 EPRI Soil (1993) & Peninsular Range 22 2490 EPRI Soil (1993) & Peninsular Range 33.9 3020 EPRI Soil (1993) & Peninsular Range 61.8 2490 EPRI Soil (1993) & Peninsular Range 83.5 1710 EPRI Soil (1993) & Peninsular Range (ms) = 0.0605*H 26.1 2290 EPRI Soil (1993) & Peninsular Range = 0.031 24.9 1780 EPRI Soil (1993) & Peninsular Range 81.9 2490 EPRI Soil (1993) & Peninsular Range 365 2200 430 2630 450 3060 Bedrock 9285 0.006 20

Amplification Functions 21 Source: ML14090A043 and NRC Calculations

NRCs Preliminary GMRS and PSEG ESP GMRS 22 Modified from ML14136A126 and PSEG ESP SSAR

Primary Differences

  • Different treatment of damping for Potomac Group Formation
  • Licensee determined a total kappa value of 0.037
  • NRC calculations produce a total kappa of 0.015
  • Licensee used 3 base case profiles vs 1 for NRC 23
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