ML031540423

Attachment 5 - Enercon Services, Inc. Quality Assurance Planning Document - Preliminary Evaluation of Uniform Hazard Spectra

ML031540423
Person / Time
Site:	Grand Gulf, PROJ0720
Issue date:	05/20/2002
From:	Hengesh J, Lettis W, Schneider A Enercon Services
To:	Office of Nuclear Reactor Regulation
Koenick S,NRR/ADIP/NRLPO, 301-415-1239
Shared Package
ML031540679	List: ML031540423
References
FOIA/PA-2005-0280 ENTO002-PI-04, Rev 0
Download: ML031540423 (8)

Text

ATTACHMENT 5 ENT0002-PI-04, Revision 0 (7 pages)

Preliminary Evaluation of Uniform Hazard Spectra PPD ENTO-002 REV. 1 ATTACHMENT 5

Project Instructions for the Entergy Nuclear-Potomac Early Site Permitting Project

~ Evaluation Preliiinary r ~~

ua;. of Uniform Hazard Spectra -

Project Instruction No: ENTO002-PI-04 Revision No.. 0

. . 1-Printed Name: Date:

James Hengesh (WLA) May 20, 2002 Printed Name: Date:

William Lettis (WLA) May 20, 2002 Approved by: Printed Name: Date:

' <L40~ AE. .roet g Enercon Project Manager SE/ C>-Z

1.0 PURPOSE 1.1 Project Scope This Project Instruction provides guidelines for. completing the initial evaluation of design ground motions at the Grand Gulf Nuclear Station (GGNS) using the stream-lined approach described in our proposal for the Early Site .Permit Application for the GGNS site. The initial estimates of ground motions will be developed by compiling.and evaluating existing seismic source models and hazard computations and then testing the sensitivity of these existing models to new information that.may-be av'ailable. New

'information ay include changes to seisi'l "'ource zone geometry,. maximum earthquake magnitude, and earthquake recurrence rates. Other changes may include modification to the ground motion attenuation equations and/or revisions to the coiputational methodology in the probabilistic seismic.hazard assessment (PSHA) codes used in the previous EPRI (1993) and LLNL (1994) h'azard'assessments.

If the resulting Uniform. Hazard Spectra (UHS) for the GGNS prove tobe consistent With the existing UHS from the EPRI (1993) or LLNL (1924) hazard assessments, William Lettis & Associates (WLA) Project Manager may recommend using these existing values in design of the new facilityat the .GGNS. site...

1.2 Responsibilities

'VLA shall be responsible for compiling and evaluating the seismic so.urce models, ground motion attenuation equations and applicable PSIA codes. The WLA Project Manager shall provide overall direction of the ground motion assessment. He shall

'supervise a staff of senior and staff geologists and an engineering seismologist. The

'Senior Geologist and Engineering Seismologist shall be 'tesponsible for day-to-day.

performance of the technical.work for seismic source characterization. Supporting staff shall be either Project or Staff Geologists-afWLA and shall be responsible for carrying out specific tasks related to the seismic source characterization.

2.0 APPLICABILITY This Project Instruction is applicable to all persons performing data cormpilation and data interpretation, and ground motion assessment for the ENTERGY GGNS Early Site Permit investigations.

3.0 DEFINITIONS AND ACRONYMS The defiitions of acronyms used in this Project Instruction are presented below:

• EPRI - Electrical Power Research Institute

• ESP - Early Site Permit

• FER - Final Environmental Report ENTO002-PI-04 2of 7 Revision 0

• GGNS - Grand Gulf Nuclear Station

• LLNL - Lawrence Livermore Nation Laboratories

• NRC - Nuclear Regulatory Commission

• PI - Project Instruction

• PSAR - Preliminary Safety Analysis Report .

PSHA - Probabilistic Seismnic Hazard Assessment

• SER -. NRC Safety Evaluation Report and Supplerments d SSE - Safe Shutdown Earthquake'

• UFSAR - Updated Final Safety Analysis Report:

• UHS - Unifori Hazard Spectrum. The respons'spectrum with the properfy that the probability of exceeding the response spectral value is e4al'to a constant at all spectral frequencies. - -

• WLA-- William Lettis & Associates.

The definitiois of data sources referred7to in this PI are as follows: -

• Peer Reviewed Information - inforation (e.g., articles, maps and reports) published in professional joumals that has undergone peer review prior to publication; . _

• Published Information - information (e.g., reports, articles and maps) that is published, but that has not undergone peer review prior to publication;.

• Unpublished Data and Literature information (e.g., technical articles and consulting reports) that contains signifliant relevant information, but that has not been formally peer reviewed or publifsTd-in the'p-ublic domain;

• GGNS License Support Documents - information (e.g., the PSAR, UFSAR, FER, and SER) submitted to the NRC in support of the licensing and operation of the GGNS.

• WLA Field Data- information (e.g, maps, notes, photographs and other documentation) gathered during WLA's field reconnaissance.

• Third Party Data - information (e.g., seismicity catalogs, topographic maps, boring logs, and aerial photographs) from reputable sources, but that has not been through a formal technical review.

4.0 ' METHODOLOGY This section describes the methodology to be used for the preliminary evaluation of the UHS at the GGNS.

ENTO002-PI-04 3 of 7 Revision 0

4.1 Data Compilation 4.1.1 Data compilation and review for seismic source characterization shall be completed for an area within 320 km of the project site. A Reference Summary Form (Attachment 1) shalt be completed for each source of data and retained in the WLA project file as specified in Paragraph 4.1.2.

4.1.2 All sources of data shall be reviewed for accuracy and reliability (ranked from A-highest to D-lowest on the Summary Referenice From, Attachme'nt

1) and retained in the WLA project file as specified below:

4.1.2.1 Peer Reviewed Information shall be compiled, nd a-;

comprehensive reference list will be reiained in the project file together with Reference Summary Forrs for each reference.

Copies of the peer-reviewed information nee'd not be retained in the project file. Peer reviewed published information will be accepted as:reliable.

4.1.2.2 - Published Information shall be copied, retained in the project file,-and added to the comprehensive reference list. This zion-peer reviewed information will be reviewed for completeness and accuracy prior to acc'epfance as reliable.data.

4.1.2.3 Unpublished Data and Literature shall be copied, retained in th'e project file, and added tothe co,mprehensive refereice list.

'is non-peer reviewed infornation will be reviewed for comnpleteness,and accuracyprior.to acceptance as reliable data.

4.1.2.4 GGNS Licensing Documents shall be added to the reference list and do not need to be retained in-fill in the project file.

This iformation will be accepted as reliable up to the date7 of publication.  : ' . ,- -

4.1.2.5 WLA Field Data shall be retained in a field notebook with identifiers as'indicated in Subsection 4.2 below. The completed field notebooks shall be attached to a Reference Summary Form and retained in the project file.

4.1.2.6 Third Party Data shall be accompanied by the Reference Summary Form to clearly indicate the source of the data. Data from Federal and State sources (e.g. seismicity catalogs) will be reviewed for completeness and accuracy prior to acceptance as reliable data.

4.1.3 Reference citations shall follow the Geological Society of America citation format. All pertinent publications shall be summarized on the attached Reference Summaiy Form. Copies of the Reference Summary Forms will be kept in the WLA project file.

ENTO002-PI-04 4of 7 Revision 0

4.2 Streamlined Approach to Rock Spectra 4.2.1 Recommended UHS RG 1.165 (NRC, 1997) recommends that either the EPRI (1993) or LLNL (1994) UHS be used for the rock UHS at the site; however, it also notes that if new information has become available, the impact of this new information on the estimation of the seismic.-hazard should be evaluated to ensure that the UHS is still appropriate.

4.2.2 New Information It has been over 15 years since the EPRI and LLNL studies were -

conducted.' During this time, new information that may affect the -s-eismic hazard at the GGNS site has b.ecome available, including-data on- seismic sources and the ground motion attenuation. In this task, the impact of this new infornation on the seismic hazard atthe site and the adequacy of - -

EPRI and/or LLNL UHS- shall be evaluated:

4.2.3 Compile EPRI and LLNL Hazard-Curves-The median UHS for the refeience annua probability of 10: 5from the EPRI (1993),and LLNL (1994) studies:shallbe compiled.- Copies ofthese documents shall be retained.in the.WLA project file.

4.2.4 Identify New- Ground Motion AttenuationRelations The literature shall be reviewed to identify new ground moti6n attenuation relations that are applicable to the .Eastern United States. Appropriate reference citations shall be compiled,and added to the comprehensive reference list for new attenuaton-ecquations relevant to this task.. -All .,

• ._ ;. reference material reviewed shall be accompanied by the Refirence

... : Summary Form and retained in the WLA project file. . -. ..

4.2.5 Compute Hazard Using New Information Using updated source characterization provided by WLA (Section 4.1) and updated attenuation relations (Section 4.2.4), the seismic hazard shall be computed for spectral frequencies of 0.5, 1.0, 2.5, 5.0, 10.0, 20.0, 33.0, and 50.0 Hz. The median UHS with an annual probability of 10'5 shall be computed. The calculations shall be completed in accordance with Enercon CSP 3.01, "Preparation and Control of Calculation", and CSP 3.02, "Control of Computer Software".

4.2.6 Evaluate Adequacy of the EPRI and LLNL UHS Using the UHS computed from the new infornation on the source characterization and ground motion attenuation, the adequacy of the EPRI and LLNL UHS shall be evaluated. If the UHS computed using the new information is lower than either the EPRI or LLNL UHS, then the use of the EPRI or LLNL UHS shall be recormended and additional hazard studies shall not be needed. If the UHS computed using the new information is greater than both the EPRI and LLNL UHS, then a ENTO002-PI-04 S of 7 Revision 0

complete update of the seismic hazard may be needed. The WLA Project Manager will discuss this option with the Entergy project management to discuss the results and implications of our findings.

5.0 WLA PROJECT FILE The Reference Summary:Forms, comprehensive reference list, copies of appropriate articles, and the records required byEnercon CSP's 3.01 and 3.02 shall be retained in the WLA project file.

6.0 LOST DATA In cases where data or files are lost or damaged, the WLA Project anager shall

'determine if interpretations and or cal&ilaions -can be made from existing data or if the data need to be recollected. These act6on -shallbe documented by aWLA incident report indicating the type and number of dat. lost or damaged. The -incident report shall be signedand dated kY the WLA Project Manager and the Eriercon Quality Assurance - -

Manager.  ; .

7.0 INDEPENDENT TECHNICAL REVIEW-The calculation of UHS shall be independently reviewed and documented in accordance withEnercon CSP 3.01. The qualification" ofthe reviewer;haIl be as-specified -the PPD.  : - . - - -

-~

- 8.0 ATTACHiMENTS The attachment(s) and their total page count associated with this Project Instruction are as follows:

• Attachment 1: "Reference Summary Form" (1page).

9.0 REFERENCES

Electric Power Research Institute, 1993, "Guidelines for Determining Design Basis Ground Motions," EPRI Report TR-102293, Volumes 1-4.

Lawrence Livermore National Laboratory (1994) "Revised Livermore Seismic Hazard Estimates for Sixty-nine Nuclear Power Plant Sites East of the Rocky Mountains," NUREG-1488, USNRC, April 1994.'

Nuclear Regulatory Commission, 1997, Regulatory Guide 1.165, "Identification and Characterization of Seismic Sources and Determination of Safe Shutdown Earthquake Ground Motion."

ENT0002-PI-04 6of 7 Revision 0

Attachment 1 - -

Reference Summary Form GGNP Task 1 Data Review Reviewer: .(WLAI) Date:

Circle Reference Type: Peer Reviewed Published License Support Field Data Third Party Complete citation (Geological Society of America format)

-- e O ^- ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Applicability (e.g. related to site conditions, tectonic s.etfing, source model, or ground motion estimation)

.Summary of relevant information -

Data Reliabitity (A-best D-worst; and provide basis for rating)

Potential'ne'w issue ENT0002-PI-04 7of 7 Revision 0