DCL-14-081, Diablo Canyon Units 1 and 2, Central Coastal California Seismic Imaging Project (Cccsip) Chapter 13, GEO.DCPP.TR.14.08 R0.Txt.w.ITR

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Diablo Canyon Units 1 and 2, Central Coastal California Seismic Imaging Project (Cccsip) Chapter 13, GEO.DCPP.TR.14.08 R0.Txt.w.ITR
ML14260A062
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Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 09/10/2014
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Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation
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References
DCL-14-081
Download: ML14260A062 (23)
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PACIFIC GAS AND ELECTRIC COMPANY GEOSCIENCES DEPARTMENT TECHNICAL REPORT Report Number: GEO. DCPP.TR.14.08 Report ReYision:

0 Report Date:OS/6/14 Quality Related: Y Page 1 of21 REPORT TITLE: Hazard Sensitivity and Impact Evaluation SIGNATORIES PREPAREDBY: Norman Abrahamson PG&E Printed Name Organization VERIFIED BY:

Kathryn Wooddell PG&E Printed Name Organization APPROVED BY: /Z.kf DATE: O'f /tV /zo/ 'f Richard Klimczak Printed Name Organization

Page I of2 GEO.DCPP.TR.14.08 RO Attachment I VERIFICATION

SUMMARY

REPORT Item Parameter Yes No* NIA* I Purpose is clearly stated and the report satisfies the ./ Purpose. 2 Data to be intetpreted and/or analyzed are included or ./ referenced.

3 Methodology is appropriate and properly applied. ./ 4 Assumptions are reasonable, adequately described, and ./ based upon sound geotechnical principles and practices.

5 Software is identified and properly applied. Validation

./ is referenced or included, and is acceptable.

Input files are correct. 6 Interpretation and/or Analysis is complete, accurate, ./ and leads logically to Results and Conclusions.

7 Results and Conclusions are accurate, acceptable, and ./ reasonable compared to the Data, interpretation and/or analysis, and Assumptions.

8 The Limitation on the use of the Results has been ./ addressed and is accurate and complete.

9 The Impact Evaluation has been included and is ./ accurate and complete.

10 References are valid for intended use. ./ II Appendices are complete, accurate, and suppmi text. NIA* *No appendices or suppmting documents are included.

Comments:

  • Table 1-1 "20 II Shoreline Repmi" parameters are the maximum fault length, the minimum dip, and the 90th fractile magnihtde.

The minimum dip and 90th fractile parameters in this table are correctly transmitted from Table 6-8 of the 2011 Shoreline Fault repmt. The maximum length for each fault source is taken from the 2011 Shoreline Fault logic trees in Chapter 5 (Shoreline:

Figure 5-2, Hosgri: Figure 5-9, Los Osos: Figure 5-10, San Luis Bay: Figure 5-11). The "Updated Parameters" in Table 1-1 also include the maximum fault length, the minimum dip, and the magnitude.

Updated magnitudes are verified using Leonard 2010 (see "Chapter13check.xls").

Updated dip for the Hosgri and Los Osos faults are taken from the "Study Results" section of the CCCSIP Repmt Executive Summary (Hosgri Dip: Study Result

  1. 2, Los Osos Dip: Shtdy Result #5). The updated maximum length for the Shoreline fault is taken from the Shtdy Result# I 0 of the CCSIP Report Executive Summary, and the updated maximum length for the Hosgri fault consistent with the USGS value. The approach for computing the Hosgri length is verified and appropriate.

All values in Table 1-1 are verified to be accurate.

  • Table 2-1 magnitudes and dips are correctly transmitted from Table 1-1. The downdip widths are independently computed (see "Chapter13check.xls")

and verified to be Page 2 of2 GEO.DCPP.TR.l4.08 RO Attachment 1 correct. The sense of slip for each of the faults is verified to be appropriate based on Table 6-8 of the 2011 Shoreline Fault report. Hypocentral depth is an assumed parameter, and it is verified to be reasonable.

Also, the depth to top of rupture is an assumed parameter, and it is reasonable based on the magnitudes of the ruptures assigned to each fault. All values in Table 2-1 are verified to be accurate.

  • Because the Hosgri and Los Osos dips have been updated, the RRUP and Rm parameters in Table 2-2 are new values. These parameters were independently computed by hand and verified to be correct. All other distance metrics (RRuP, Rm, and Rx) in Table 2-2 are correctly transmitted from Table 6-8 of the 20 II Shoreline Fault report. DCPP is located on the HW side of each of these fault sources (with the exception of Shoreline because dip=90) and this parameter is verified to be correct. Vs30 is a default parameter based on the reference rock condition.

It is a reasonable assumption and verified to be appropriate.

Default values are used for Z1 and Z2.5 and this is a reasonable approach for the purposes of this calculation.

All values in Table 2-2 are verified to be accurate.

  • Table 2-3 was verified against Tables 6.5-1 and I 0.1-1 in GEO.DCPP.14.03 revO.
  • Median SA values (the geometric mean over the 4 NGA-W2 models) for the deterministic fault sources in Tables 2-4,2-5,2-6,2-7, and 2-10 were computed using the PEER spreadsheet (NGA W2_ GMPE_Spreadsheets_v5.5_060514_Protected.xlsm).

The spreadsheet was also used to compute the Median SA plus one standard deviation and from these two numbers, the average standard deviation model over the 4 NGA GMPEs was computed.

Finally, ass was computed using equation 2-2. Tables 2-4, 2-5, 2-6, 2-7, 2-10 are verified to be correct (see "Chapter 13check.xls" for independent ITR computation).

  • Using equation2-l, the deterministic 84 1" percentile ground motions were independently computed using the median spectral acceleration (Tables 2-4,2-5,2-6,2-7, and 2-10), the site amplification factors for the power block foundation and the turbine building foundation (Table 2-3) and the standard deviation.

The values in Table 2-8, 2-9, and 2-11 are verified to be correct (see "Chapter13check.xls" for independent ITR computation).

All supporting documents for this ITR report are located on the Geosciences S:/ Drive. ({3/tff/11 (date) '

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