View source for NUREG-0797, Summary of Meeting on 890905 in Rockville,Md to Discuss Ground Motion Estimates for Criner Tectonic Structure of Southern Oklahoma Aulacongen in Wichita Tectonic Province, Per Section 2.5.2 of Fsar.Viewgraphs Encl

{{Adams
| number = ML20247E699
| issue date = 09/11/1989
| title = Summary of Meeting on 890905 in Rockville,Md to Discuss Ground Motion Estimates for Criner Tectonic Structure of Southern Oklahoma Aulacongen in Wichita Tectonic Province, Per Section 2.5.2 of Fsar.Viewgraphs Encl
| author name = Wilson J
| author affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| addressee name = 
| addressee affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| docket = 05000445, 05000446
| license number = 
| contact person = 
| case reference number = RTR-NUREG-0797, RTR-NUREG-797
| document report number = NUDOCS 8909150359
| document type = MEETING MINUTES &amp; NOTES--CORRESPONDENCE, MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
| page count = 28
}}

=Text=
{{#Wiki_filter:. _ _ - _ - - _ _ _-.                                                        - - - - - - - - --
           ^         . p mog#o Ig                            UNITED STATES c !"                 p-             NUCLEAR REGULATORY COMMISSION
                 '5              rp                        WASHINGTON, D. C. 20555 j#                                        September 11, 1989
                        **..+
Docket Nos. 50-445 and 50-446 APPLICANT:-       Texas Utilities Electric Company (TV Electric)
FACILITY:         Comanche Peak Steam Electric Station (CPSES), Units 1 and 2

==SUBJECT:==

==SUMMARY==
OF MEETING ON SEPTEMBER 5, 1989 A meeting was held on September 5, 1989 in Rockville, Maryland to discuss ground motion estimates for the triner tectonic structure of the Southern Oklahoma Aulacogen in the Wichita Tectonic Province as it relates to the staff's review of Section 2.5.2 of the FSAR for Comanche Peak. A list of attendees is provided as Attachment 1. The slides used by TU Electric in their' presentation are provided as Attachment 2.
Recent NRC staff effort associated with the review of the operating license application for Comanche Peak has involved an extensive review of the staff's Safety Evaluation Report, as supplemented, since NUREG-0797 was originally issued in July 1981, to determine the extent to which the con-clusions in that report have been affected by design changes resulting from the Corrective Action Program, amendments to the Final Safety Analysis Report, and other events that have occurred over time.
Part of that effort has involved consideration of the effect of the results of seismic hazard studies on the seismic design basis for Comanche Peak. Detailed investigations of the Meers Fault by several organizations, including NRC research contractors, had demonstrated that it is a capable fault, as defined by the siting criteria in Appendix A to 10 CFR Part 100. Although there is no current seismicity associated with the Meers Fault paleoseismic evidence shows that there have been at least two large seismic events on the fault within the past 3000 years. Based on analysis of the paleoseismic data, estimates of the sizes of these prehistoric earthquakes are in the magnitude range from 6 3/4 to 7 1/2.
Recently, ongoing research studies by an NRC contractor have identified another fault that appears to be similar to the Meers Fault with respect to relatively young surface rupture, lack of seismicity, and being a member of the Wichita Frontal Fault System. The discovery of the Criner Fault now raises the possibility that at least two capable faults lie within this 700 kilometer-long fault system.
The Criner Fault lies near the southern boundary of the Southern Oklahoma Aulacogen and is about 200 kilometers north of Comanche Peak. This area is part of the Wichita Tectonic Province, as defined in Section 2.5.2.2.2 of the FSAR and in the Ouachita-Wichita belt of seismicity, as discussed in Section 2.5.2.3 of the staff's SER. In the SER, the largest regional historic earthquake, the 1882 maximum Modified Mercalli intensity VII Paris, Texas earthquake, was associated with the Ouachita-Wichita belt and assumed to occur at its nearest approach to the plant site: 65 miles or about 105 kilometers.
8909150359 890911                                                                                                        \
FDR      ADOCK 05000445                                                                                *n y 0 A                       PDC                                                                              7

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f,fe '          Summary of 9/5/89 Meeting                                                                                  Although this information is recent, the staff believes that it would'be.
                                                                        ~
prudent to assess the effects.of a capable Criner Fault on.the seismic design
                . basis and seismic safety of Comanche Peak. Accordingly, the staff informed TU Electric of these findings and arranged a meeting to discuss the matter.
               . Staff and contractors from TV Electric. visited the site of the Criner Fault in August 1989. Low-angle. lighting videotapes and photographic slides were-presented at the meeting to supplement discussions of the similarities and differences between Criner and Meers. Based on that information, TV Electric and its consultants have concluded that the Criner Fault is:not a ' capable fault.
Nevertheless, TU Electric also presented preliminary information concerning the relevant seismic ' forces and ground motions, attenuated.to the plant site, that
               .would be produced by. the maximum earthquake from a Criner Fault. Based on that evaluation, TU Electric concluded that the Comanche. Peak seismic design basis                                                        !
adequately envelopes the resulting seismic forces.
At the conclusion of the meeting, the staff stated that'it would request TV Electric to submit additional information on the docket to assure that an adequate basis exists-for the Comanche Peak seismic design.
k Jan/es H. Wilson, Assistant Director fbf Projects Comanche Peak Project Division Office of Nuclear Reactor Regulation

==Enclosures:==
: 1.    ' List of Attendees 2'. TU Presentation Slides                                                                                                        '
cc: See next page I
i

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                                                                                                    )
;.               .CC*
Jack R. Newman, Esq.
Mr. Robert F. Warnick Assistant Director                          Newman & Holtzinger                      f
                      -for Inspection Programs                1615 L Street, NW Comanche Peak Project Division              Suite 1000.
U. S. Nuclear Regulatory Connission         Washington, D.C. 20036                   q P. O. Box 1029                                                                         1 Granbury, Texas 76048                       Chief. Texas Bureau of Radiation Control  J I
Texas Department of Health Regional Administrator, Region IV           1100 West 49th Street, U. S. Nuclear' Regulatory Connission        Austin, Texas 78756 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011                      Honorable George Crump County Judge                             '
Ms. Billie Pirner Garde, Esq.               Glen Rose, Texas 76043 Garde Law Office                            Mr. William J. Cahill, Jr.
104 East Wisconsin Avenue                  Executive Vice President, Nuclear Appleton, Wisconsin 54911                   Texas Utilities Electric Company 400 H. Olive Street, L. B. 81 Mrs. Juanita Ellis, President               Dallas, Texas     75201 Citizens Association for Sound Energy 1426 South Polk Dallas, Texas 75224 Mr. E. F. Ottney P. 0. Box 1777 Glen Rose, Texas 76043 Mr. Roger D. Walker Manager, Nuclear Licensing Texas Utilities Electric Company 400 North Olive Street, L. B. 81 Dallas, Texas 75201 Texas Utilities Electric Company c/o Bethesda Licensing 3 Metro Center, Suite 610 Bethesda, Maryland 20814 William A. Burchette, Esq.
Counsel for Tex-La Electric Cooperative of Texas Heron, Burchette, Ruckert & Rothwell 1025 Thomas Jefferson Street, NW Washington, D.C. 20007 GDS ASSOCIATES, INC.
Suite 720 1850 Parkway Place                                                                <
Marietta, Georgia 30067-8237

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1 lI List of: Attendees at meeting held on,
                                                                                       ; September 5,'1989 in R.ckville, o          MD.
to discuss ground motion estimates for Criner Fault
]
                            . NRC' C I. Grimes J...E. Lyons-~
i,                           - J. H.' Wilson-M.' Fields G. Bagchi L.!Reiter:
R. McMullen-R. Rothman D. Guzy:.
A. J. Murphy.-
l
                              'TU Elect'ric-R..D. Walker
                             -0. Lowe.
.,                           <   J. S.'. Marshall L                                 C. T.LHooten R. M. Kissinger.
                             'B.!F1anigan J. C. Stepp-
                             - H. R. Acharya -
                             - N. R. Tilford M.'Axelrad T. Hicks N. Donovan CASE Doyle 1
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l NOTES: BASIS FOR INTENSITY DATA                                                                                                                                                                             j INTENSITY Vill - VALENTINE, TEXAS, 1931 INTENSITY Vil       -
BONHAM, TEXAS, 1882 EL RENO, OKLAHOMA,1952 9 ASIS FOR COMPARISON (121,122.123) 10 - EPICENTER INTENSITY                                                                                                                                                                                 ]
I(R) - INTENSITY AT DISTANCE R COMANCHE PEAK S.E.S.                                                                 I FNAL SAFETYANALYSIS REPORT UNITS 1 and 2                                  j EARTHQUAKE ATTENUATION FIGURE                                                     2.5.2-14

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                                              ' Intensity le  Of Subprovince -  Earthquake                Attenuation                                                                   intensity                                     Ground Subprovince     To site        Fron Site            Of Eartheuake                                                                    Used For     Intensity ' Acceleration.
Tectonte subocovince       And Oste       (Miles)         (Miles)                           (ntles)                                                           Attenuation . At site -                        at Site i
Wichita Provtace Anadarta Basta       V!! 1952           163             213                                    163                                                              VII       IV *                             <0.05 Amar111e Up11f t Wichita Mtns.
Arbuckle Upttft      VI      1968         91             141                                       fl                                                           VI        <VI                                0.06 Palo Duro Basin.
Hardeman Basin       el      1951       153             373                                    153                                                              VI        <VI                                0.06 Matador Arch.
Red River Uplift Meunstar Arch       IV       1950         70              91                                       70                                                           IV        <!V                              <0.05 Seetnote-hemaha' Uo1tft Provtace         VII 1952           172             213                                    172                                                              VII       !Y *                             <0.05 Ouachita Province Esposed Duachtta     VI      1969       162              34!                                   162                                                              VI        <VI                              <0.06 -
Wichita-Duachita   VII       1882         se             155                                       70                                                           VII       VI
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COMPARISON MEERS AND CRINER FAULTS N. R. TILFORD TEXAS A&M SIMILARITIES MEERS                                           CRINER VERTICAL                                       VERTICAL STRAIGHT                                        STRAIGHT INVOLVES LIMESTONES                             INVOLVES LIMESTONE PALEOZOIC TRANSFORM MOVEMENT                    PALEOZOIC TRANSFORM MOVEMENT DOWN TO NORTH                                  DOWN To NORTH?
POST PALEOZOIC MOVEMENT                         INFERRED POST PALEOZOIC              1 MOVEMENT DOMINANTLY VERTICAL                            DOMINANTLY VERTICAL                j MAINLY REVERSE                                 REVERSE TYPE UP TO NORTH                                    UP TO NORTH
               .                                                                                                              1 FITS PRESENT STRESS PATTERN                    FITS PRESENT STRESS PATTERN        )
PRESENT CONDITIONS                             PRESENT CONDITIONS LACKS EARTHQUAKES OF ANY SIZE                   LACKS EARTHQUAKES?
LIMESTONE ON NORTH,                            LIMESTONE ON NORTH SANDSTONE AND SMALE TO SOUTH                    SANDSTONE AND SHALE TO SOUTH
                                                                                                                        ..w.
A ._.__d.__.________E_._    _ _ _ _ _ _ _ _ . ._m___

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DIFFERENCES
[                                                                   CRINER g      ,
MEERS
                      '27-37 KM LONG                     - 12 KM LONG YOUNG TERRACE dFFSET              - YOUNG TERRACE NOT OFFSET MULTIPLE QUATERNARY ALLUVIAL      - ABSENCE OF MULTIPLE TERRACES SUGGEST EPISODIC            QUATERNARY ALLUVIAL TERRACES QUATERNARY ACTIVITY                  3UGGEST LACK OF EPISODIC QUATERNARY ACTIVITY l
I L                  -
1000' TOPOGRAPHIC RELIEF          - LESS THAN 100' RELIEF l-                 -
CONTINUOUS SCARP           <      - DISCONTINUOUS SCARP
                   -   COLLUVIUM STRANDED-UP BLOCK       - NO SOIL-COLLUVIUM ON UP BLOCK
                   -   LACK OF RECEMENTATION-TENSION     - LIMESTONE BREAKS HEALED?
l GASHES AND RAMPS YOUNG FANS-DOWN BLOCK             - NO YOUNG ALLUVIAL FANS ON       I DOWN BLOCK SEEN NEW DRAINAGE                      - NO NEW DRAINAGE SEEN
                   -    ELOCKS OF TOPSOIL TO DOWN SIDE   - NO TOPSOIL FRAGMENTS TO DOWN BLOCK 7
                   -    NO COMPETING EXPOSURE, I.E.      - BEDDING PLANE SCARPS SAME BEDDING PLANES                      HEIGHT AND ASPECT AS FAULT SCARP FOLDING AT SURFACE REDIRECTS     - NO SURFACE FOLDING?             )
STREAMS SOFT AND HARD ROCKS RETAIN       - ONLY HARD ROCKS REMAIN HIGH SCARP
                        $ MALL SCARPS ON SCARP           - NO SMALL SCARPS               3 WEATHERING PATINA NOT SET         - WEATHERING PATINA UNEVENLY       )
DEVELOPED-RECENT EROSION?

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    .                                                                                                                        1 August 29,1989 COMANCHE PEAK Summary of Combined Probability Studies (200 kms) 1 Second Period Response many                     . ... . . . . . . . ~ . ..
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Distance in Kilometers Comparison of LLNL and EPRI attenuation relationships for the peak acceleration of a magnitude 7 event. All weighting of 11 LLNL equations and 3 EPRI equations was done arithmetically.
                                                                                                                                 .~

3   ., :>.     -
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         '5, Spectral comparison of Comanche Peak 5% damped spectrum with LLNL cnd,EPRI spectra for a' magnitude 7 event at.200 kilometers. All veip'-ting of 11 LLNL and 3 EPRI equations was done arithmetically.
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                        - CONCLUSION:
l                        YOU HAVE HAD AN UPDATE ON THE WICHITA PROVINCE, SPECIFICALLY                                                                   )
l l
l NO EARTHQUAKE ACTIVITY ON THE MEERS OR l
CRINER FAULTS IN THE HISTORICAL RECORD i
l AMPLE EVIDENCE OF MOVEMENT ON THE MEERS
  -l                          FAULT SUBSTANTIAL TOPOGRAPHICAL EVIDENCE THAT THE                               I i
CRINER HAS NOT MOVED IN THE RECENT GEOLOGIC
{
PAST.                                                                     j l
NOTWITHSTANDING THE ABOVE, WE HAVE POSTULATED A j                    MAGNITUDE SEVEN EVENT ON THE CRINER AND DEMONSTRATED THAT THIS EVENT COULD BE ACCOMMODATED AT CPSES.
THE CRINER FAULT (IF CAPABLE) WOULD BE A MINOR CONTRIBUTOR TO THE SEISMIC HAZARD AT CPSES.
i COMANCHE PEAK SEISMIC DESIGN SPECTRA IS VERY CONSERVATIVE AND REVISION IS NOT APPROPRIATE.
                                                                                                        )
4 a         ,
* __  .._____________________?_.'_CIl

       . . e- , ,
m REFERENCES j
Atwood, W.W., 1940, The Physioarachic Proviness of North Ameriq_q: Ginn and Company, Boston MA, 536 p.
Bain, H.F.,~ 1900 Geology of the Wichita Mountains:            Geolooical Society of America Bulletin, Vol.11, pp.127-144.
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                                                                                      ' ._.__.__.b_____.__._ ___ _______.____--

September 11, 1989' Summary of 9/5/89 Meeting.                                       Although this information is'recent, the staff believes that it would be prudent to assess the effects of a capable Criner Fault on the seismic design basis and seismic safety of Comanche Peak. Accordingly, the staff informed TU Electric of these findings and arranged a meeting to discuss the matter.
Staff and. contractors from TU Electric visited the site of the Criner Fault in August 1989. Low-angle lighting videotapes and photographic slides were presented at the meeting to supplement discussions of the similarities and differences between Criner and Meers. Based on that information, TU Electric and its consultants have concluded that the Criner Fault is not a capable fault.
Nevertheless, TV Electric also presented preliminary information concerning the relevant seismic forces and ground motions, attenuated. to the plant site, that would. be produced by the maximum earthquake from a Criner Fault. Based on that evaluation, TU Electric concluded that the Comanche Peak seismic design basis adequately envelopes the resulting seismic forces.
At the conclusion of the meeting, the staff stated that it would request
                              ~
TV Electric to submit additional information on the docket to assure that an adequate basis exists for the Comanche Peak seismic design.
(original signed by)
James H. Wilson, Assistant Director for Projects Comanche Peak Project. Division Office of Nuclear Reactor Regulation

==Enclosures:==
: 1. List of Attendees
: 2. TV Presentation Slides cc:    See next page DISTRIBUTION
                     ; Docket File, CVandenburgh 1
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