ML14035A226

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Correction to the Response to a Nuclear Regulatory Commission 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
ML14035A226
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 01/27/2014
From: Broschak J P
Wolf Creek
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
ET 14-0002
Download: ML14035A226 (9)
v • d • e


Text

W*o F CREEKNUCLEAR OPERATING CORPORATION John P. BroschakVice President Engineering January 27, 2014ET 14-0002U. S. Nuclear Regulatory Commission ATTN: Document Control DeskWashington, DC 20555

Reference:

1) Letter dated March 12, 2012, from E. J. Leeds and M. R. Johnson,USNRC, to M. W. Sunseri, WCNOC, "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 (NTTF) Review of Insights from the Fukushima Dai-ichiAccident"
2) Letter dated February 15, 2013, from D. L. Skeen, USNRC, to J. E.Pollock, NEI, "Endorsement of EPRI Final Draft Report 1025287,'Seismic Evaluation Guidance"'
3) Electric Power Research Institute Report 1025287, "SeismicEvaluation Guidance:

Screening, Prioritization and Implementation Details (SPID) for the Resolution of Fukushima Near-Term Task ForceRecommendation 2.1: Seismic"4) Letter dated April 9, 2013, from A. R. Pietrangelo, NEI, to D. L. Skeen,USNRC, "Proposed Path Forward for NTTF Recommendation 2.1:Seismic Reevaluations"

5) Letter dated May 7, 2013, from E. J. Leeds, USNRC, to J. E. Pollock,NEI, "EPRI Final Draft Report XXXXXX, "Seismic Evaluation Guidance:

Augmented Approach for the Resolution of Near-Term TaskForce Recommendation 2.1: Seismic,"

as an Acceptable Alternative tothe March 12, 2012, Information Request for Seismic Reevaluations"

6) Letter ET 13-0029, dated September 12, :2013, from J. P. Broschak, WCNOC, to USNRC

Subject:

Docket No. 50-482: Correction to the Response to a Nuclear Regulatory Commission 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

-1.5Year Response for CEUS SitesGentlemen:

This submittal provides a corrected response to a Nuclear Regulatory Commission (NRC)request for information pursuant to 10 CFR 50.54(f) regarding the seismic aspects ofrecommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-P.O. Box 411/ Burlington, KS 66839 / Phone: (620) 364-8831An Equal Opportunity Employer M/F/HCNET ET 14-0002Page 2 of 3ichi Accident.

A corrected description of the Safe Shutdown Earthquake (SSE) Control Point isprovided on page 1 of the attachment and updated velocity profiles are provided in Figure 1 andTable 1 in the attachment.

The geotechnical profile data for Wolf Creek Generating Station(WCGS) is provided in Table 2 in the attachment.

Reference 6 provided descriptions ofsubsurface materials and properties and base case velocity profiles pursuant to Reference 5.This submittal replaces Reference 6 in its entirety.

On March 12, 2012, the NRC issued Reference 1 to all power reactor licensees and holders ofconstruction permits in active or deferred status. Enclosure 1 of Reference 1 requested eachaddressee in the Central and Eastern United States (CEUS) to submit a written responseconsistent with the requested seismic hazard evaluation information (items 1 through 7) within1.5 years. On February 15, 2013, the NRC issued Reference 2, endorsing the Reference 3industry guidance for responding to Reference

1. Section 4 of Reference 3 identifies thedetailed information to be included in the seismic hazard evaluation submittals.

On April 9, 2013, the Nuclear Energy Institute (NEI) submitted Reference 4 to the NRC,requesting NRC agreement to delay submittal of some of the CEUS seismic hazard evaluation information so that an update to the Electric Power Research Institute (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 velocityprofiles (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 March31, 2014. In Reference 5, NRC agreed with this recommendation.

The attachment contains the requested descriptions of subsurface materials and properties andbase case velocity profiles for WCGS. The information provided in the attachment to this letteris considered an interim product of seismic hazard development efforts being performed for theindustry by EPRI. The complete and final seismic hazard reports for WCGS will be provided tothe NRC in our seismic hazard submittals by March 31, 2014 in accordance with Reference 5.This letter contains no commitments.

If you have any questions concerning this matter, pleasecontact me at (620) 364-4085, or Mr. Michael J. Westman at (620) 364-4009.

Sincerely, John P. BroschakJ PB/rltAttachment cc: M. L. Dapas (NRC), w/aC. F. Lyon (NRC), w/aN. F. O'Keefe (NRC), w/aSenior Resident Inspector (NRC), w/a ET 14-0002Page 3 of 3STATE OF KANSAS )SSCOUNTY OF COFFEY )John P. Broschak, of lawful age, being first duly sworn upon oath says that he is Vice President Engineering of Wolf Creek Nuclear Operating Corporation; that he has read the foregoing document and knows the contents thereof; that he has executed the same for and on behalf ofsaid Corporation with full power and authority to do so; and that the! facts therein stated are trueand correct to the best of his knowledge, information and belief.Jo,. BroschakV'cresident Engineering SUBSCRIBED and sworn to before me this .2') day of .l J ,2014.[2 GAYLE S:1EPH-EAF`ýD

-Nct.ry Put~ic -Statj cf Kanslzr--ý-'.E;,:--

-1. 7'Expiration Date Attachment to ET 14-0002Page 1 of 6Near Term Task Force Recommendation 2.1: Seismic -1.5 Year Response of Central andEastern United States (CEUS) PlantsOn April 9, 2013, the Nuclear Energy Institute (NEI) submitted Reference 1 to the NuclearRegulatory Commission (NRC), requesting NRC agreement to delay submittal of some of theCEUS seismic hazard evaluation information so that an update to the Electric Power ResearchInstitute (EPRI) (2004, 2006) ground motion attenuation model could be completed and used todevelop that information.

NEI proposed that descriptions of subsurface materials andproperties and base case velocity profiles (items 3a and 3b in Section 4 of Reference

2) besubmitted to NRC by September 12, 2013, with the remaining seismic hazard and screening information submitted to NRC by March 31, 2014. In Reference 3, NRC agreed with thisrecommendation.

Wolf Creek Generating Station (WCGS) Subsurface Materials and Properties and BaseCase Velocity ProfilesThe basic information used to create the site geologic profile at WCGS is shown in Table 2.This site geologic profile was developed using information documented in Reference

5. TheSafe Shutdown Earthquake (SSE) Control Point is defined to be at the surface at the top of thefinished grade at an elevation of 1099.5 feet (335 meters) [Reference 5]. For dynamicproperties of soft rock layers, modulus and damping curves were represented with two models.The first model used rock curves taken from Reference 4, the second model assumed linearbehavior.

These dynamic property models were weighted equally.The three base-case shear-wave velocity profiles used to model amplification at WCGS areshown 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 shownin Table 1.

Attachment to ET 14-0002Page 2 of 6Fiaure 1Shear-Wave Velocities (Vs) for WCGSVs profiles for Wolf Creek SiteVs (ft/sec)0 1000 2000 3000 4000 5000 6000 7000 8000 9000 100000200-4006008001000 -Profile 11200 -Profile 21400 -Profile 3160018002000 __2200 !240026002800 Attachment to ET 14-0002Page 3 of 6Table ILayer Thicknesses, Depths, and Velocities (Vs) for 3 ProfilesProfile I Profile 2 Profile 3Thick- Thick- Thick-nesslft) depth (ft) Vs(ft/s) ness(ft) depth (ft) Vs(ft/s) ness(ft) depth (ft) Vs(ft/s)0 550 0 350 0 8635.0 5.0 550 5.0 5.0 350 5.0 5.0 8635.0 10.0 550 5.0 10.0 350 5.0 10.0 8635.0 15.0 1450 5.0 15.0 928 5.0 15.0 22775.0 20.0 1450 5.0 20.0 928 5.0 20.0 22775.0 25.0 1450 5.0 25.0 928 5.0 25.0 22775.0 30.0 1450 5.0 30.0 928 5.0 30.0 22776.0 36.0 1450 6.0 36.0 928 6.0 36.0 22776.0 42.0 6200 6.0 42.0 3968 6.0 42.0 92856.0 48.0 6200 6.0 48.0 3968 6.0 48.0 92856.0 54.0 3500 6.0 54.0 2240 6.0 54.0 54956.0 60.0 3500 6.0 60.0 2240 6.0 60.0 54954.0 64.0 3500 4.0 64.0 2240 4.0 64.0 54956.0 70.0 6200 6.0 70.0 3968 6.0 70.0 92856.0 76.0 6200 6.0 76.0 3968 6.0 76.0 92856.0 82.0 6200 6.0 82.0 3968 6.0 82.0 92853.0 85.0 4000 3.0 85.0 2560 3.0 85.0 628018.0 103.0 4000 18.0 103.0 2560 18.0 103.0 628018.0 121.0 4000 18.0 121.0 2560 18.0 121.0 628018.0 139.0 4000 18.0 139.0 2560 18.0 139.0 628018.0 157.0 4000 18.0 157.0 2560 18.0 157.0 628018.0 175.0 4000 18.0 175.0 2560 18.0 175.0 628018.0 193.0 4000 18.0 193.0 2560 18.0 193.0 628018.0 211.0 4000 18.0 211.0 2560 18.0 211.0 628018.0 229.0 4000 18.0 229.0 2560 18.0 229.0 628018.0 247.0 4000 18.0 247.0 2560 18.0 247.0 628012.0 259.0 4000 12.0 259.0 2560 12.0 259.0 62801.0 260.0 8000 1.0 260.0 5120 1.0 260.0 92852.0 262.0 8000 2.0 262.0 5120 2.0 262.0 92855.0 267.0 4250 5.0 267.0 2720 5.0 267.0 667218.0 285.0 4250 18.0 285.0 2720 18.0 285.0 667218.0 303.0 4250 18.0 303.0 2720 18.0 303.0 667218.0 321.0 4250 18.0 321.0 2720 18.0 321.0 667218.0 339.0 4250 18.0 339.0 2720 18.0 339.0 6672 Attachment to ET 14-0002Page 4 of 6Profile 1 Profile 2 Profile 3Thick- Thick- Thick-ness ft) depth (ft) Vs(ft/s) ness(ft) depth (ft) Vs(ft/s) ness(ft) depth (ft) Vs(ft/s)18.0 357.0 4250 18.0 357.0 2720 18.0 357.0 667218.0 375.0 4250 18.0 375.0 2720 18.0 375.0 667218.0 393.0 4250 18.0 393.0 2720 18.0 393.0 6672100.0 493.0 8000 100.0 493.0 5120 100.0 493.0 9285100.1 593.0 8025 100.1 593.0 5136 100.1 593.0 9285100.1 693.1 8075 100.1 693.1 5168 100.1 693.1 9285100.1 793.2 8125 100.1 793.2 5200 100.1 793.2 9285100.1 893.2 8175 100.1 893.2 5232 100.1 893.2 9285100.1 993.3 8225 100.1 993.3 5264 100.1 993.3 9285100.1 1093.4 8275 100.1 1093.4 5296 100.1 1093.4 9285100.1 1193.4 8325 100.1 1193.4 5328 100.1 1193.4 9285100.1 1293.5 8375 100.1 1293.5 5360 100.1 1293.5 9285100.1 1393.6 8425 100.1 1393.6 5392 100.1 1393.6 9285100.1 1493.6 8475 100.1 1493.6 5424 100.1 1493.6 9285100.1 1593.7 8525 100.1 1593.7 5456 '100.1 1593.7 9285100.1 1693.8 8575 100.1 1693.8 5488 100.1 1693.8 9285100.1 1793.8 8625 100.1 1793.8 5520 100.1 1793.8 9285100.1 1893.9 8675 100.1 1893.9 5552 100.1 1893.9 9285100.1 1994.0 8725 100.1 1994.0 5584 100.1 1994.0 9285100.1 2094.0 8775 100.1 2094.0 5616 100.1 2094.0 9285100.1 2194.1 8825 100.1 2194.1 5648 100.1 2194.1 9285100.1 2294.2 8875 100.1 2294.2 5680 100.1 2294.2 9285100.1 2394.2 8925 100.1 2394.2 5712 100.1 2394.2 9285100.1 2494.3 8975 100.1 2494.3 5744 100.1 2494.3 9285100.1 2594.4 9025 100.1 2594.4 5776 100.1 2594.4 9285105.5 2699.8 9075 105.5 2699.8 5808 105.5 2699.8 92853280.8 5980.6 9285 3280.8 5980.6 9285 3280.8 5980.6 9285 Attachment to ET 14-0002Page 5 of 6Table 2Summary of Geotechnical Profile Data for Wolf Creek Generating Station (a)Depth(feet)Compressional WaveVelocity (ft/sec)Shear WavePoisson's VelocityRatio (ft/sec)MeasuredUnitWeight(pcf)AverageBulkDensity(pcf)Geologic Unit(s)Material Description 0-10 Residual soil andweathered bedrock10-36 Heumader Member36-48 Plattsmouth Member48-64 Heebner, Leavenworth and Snyderville Members64-82 Toronto Member82-255 Unnamed Lawrence,

Amazonia, Ireland andRobbins Members259-262 Haskell Member262-393 Vinland, Tonganoxie andWeston Members393-402 South Bend and RockLake MembersSilty clay and weathered shaleSomewhat clayey calcareous shaleDense, Fine-grained limestone with shale layersInterbedded carbonaceous shale, limestone, and clayeycalcareous shaleFossiliferous limestone withoccasional thin shale layersInterbedded shale, siltstone and sandstone; a thin coalbed and limestone layeroccur in the upper 25 feet;pure shale is present in thebasal 60 feetDense, fine-grained limestone Interbedded siltstone, shaleand sandstone; pure shale isprese nt in the basal 30 feetDense limestone with shaleand siltstone 2,3006,00014,0007,00011,7007,8000.463-0.4750.467-0.4710.3780.3330.3050.3225006001,400-1,5006,2003,500""'d 6,2004,00099113139160165147153150-154166(b)165 (b)160 (b)166(b)0.301 (b) 8,000(b,c)0.333 (b) 4,250(b,d)0.346(b) 8,000(b,c)148-154 159(b)16,500 (b)166(b)aDepths and descriptions based on Boring B-4.b Indicates values obtained from Birdwell Elastic Property Logs, borings B-4, B-5 and B-11.CShear wave velocity measured by Birdwell.

dShear wave velocity empirically computed by Birdwell.

Attachment to ET 14-0002Page 6 of 6

References:

1. Letter from A. R. Pietrangelo, NEI, to D. L. Skeen, USNRC, "Proposed Path Forward forNTTF Recommendation 2.1: Seismic Reevaluations" April 9, 2013. ADAMS Accession No. ML13107B386.
2. Electric Power Research Institute Report 1025287, "Seismic Evaluation Guidance:

Screening, Prioritization and Implementation Details (SPID) for the Resolution ofFukushima Near-Term Task Force Recommendation 2.1: Seismic."

ADAMS Accession No. ML12333A170.

3. Letter from E. J. Leeds, USNRC, to J. E. Pollock, NEI, "EPRI Final Draft ReportXXXXXX, "Seismic Evaluation Guidance:

Augmented Approach for the Resolution ofNear-Term Task Force Recommendation 2.1: Seismic,"

as an Acceptable Alternative tothe March 12, 2012, Information Request for Seismic Reevaluations,"

May 7, 2013.ADAMS Accession No. ML1 3106A331.

4. Electric Power Research Institute Report, TR-102293, Vol. 1 -5, "Guidelines forDetermining Design Basis Ground Motions,"

1993.5. Wolf Creek Nuclear Operating Corporation (2013), "Wolf Creek Subsurface Materials,"

an informal report submitted to the Electric Power Research Institute on November 5,2013.

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