ML14168A242

Request for Additional Information Regarding Flooding Hazard Reevaluation

ML14168A242
Person / Time
Site:	Salem
Issue date:	06/28/2014
From:	John Lamb Plant Licensing Branch 1
To:	Joyce T Public Service Enterprise Group
Lamb J
References
TAC MF3790, TAC MF3791
Download: ML14168A242 (7)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 28, 2014 Mr. Thomas Joyce President and Chief Nuclear Officer PSEG Nuclear LLC P.O. Box 236, N09 Hancocks Bridge, NJ 08038

SUBJECT:

SALEM NUCLEAR GENERATING STATION, UNITS 1 AND 2- REQUEST FOR ADDITIONAL INFORMATION REGARDING FLOODING HAZARD REEVALUATION (TAC NOS. MF3790 AND MF3791)

Dear Mr. Joyce:

On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340) pursuant to Title 10 of the Code of Federal Regulations Section 50.54(f)

(10 CFR 50.54(f)) to PSEG Nuclear LLC (PSEG), associated with Near-Term Task Force (NTTF) Recommendation 2.1 for flooding. The 10 CFR 50.54(f) letter included a request for licensees under 10 CFR Part 50 to reevaluate the flood hazards at their sites against present-day regulatory guidance and methodologies being used for Early Site Permit (ESP) and Combined License reviews.

On May 11, 2012 (ADAMS Accession No. ML12097A509), the NRC issued a prioritization plan that established an external flooding hazard reevaluation schedule for each licensee. The NRC's prioritization plan initially placed Salem Nuclear Generating Station (Salem), Units 1 and 2 in Category 1, establishing a flood hazard reevaluation due date of March 12, 2013, because Salem is co-located with an ESP site. As described in PSEG's extension request letter dated March 12, 2013 (ADAMS Accession No. ML13072A033), changing NRC expectations regarding storm surge modeling methods prompted PSEG to reanalyze hurricane-related events in support of the ESP application. The storm surge reanalysis resulted in an impact to the Salem flood hazard reevaluation schedule. By letter dated April12, 2013 (ADAMS Accession No. ML13095A281 ), the NRC approved PSEG's request to extend the Salem flood hazard reevaluation submittal due date to March 12, 2014.

By letter dated March 11, 2014 (ADAMS Accession No. ML14071A401), PSEG provided the requested flood hazard reevaluation for Salem. The NRC staff has reviewed the Salem flood hazard reevaluation by PSEG and determined that additional information is needed as set forth in the enclosure.

On May 30, 2014, the draft questions were sent to Mr. Paul Duke of your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On June 9, 2014, a conference call was held to clarify the questions. On June 16, 2014, Mr. Brian Thomas of your staff indicated that PSEG will submit a response to questions 1 through 4 within 30 days of the date of this letter, and PSEG will submit a response to question 5 within 90 days of the date of this letter.

If you have any questions, please contact me at (301) 415-3100 or via e-mail at John.Lamb@nrc.gov.

Sincerely, G. Lamb, Senior Project Manager t Licensing Branch 1-2 ision of Operating Reactor Licensing ice of Nuclear Reactor Regulation Docket Nos. 50-272 and 50-311

Enclosure:

Request for Additional Information cc w/encl: Distribution via ListServ

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 REQUEST FOR ADDITIONAL INFORMATION RELATED TO FLOODING HAZARD REEVALUATION PSEG NUCLEAR LLC SALEM NUCLEAR GENERATING STATION, UNITS 1 AND 2 DOCKET NOS. 50-272 AND 50-311 On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340) pursuant to Title 10 of the Code of Federal Regulations Section 50.54(f)

(10 CFR 50.54(f)) to PSEG Nuclear LLC (PSEG), associated with Near-Term Task Force (NTTF) Recommendation 2.1 for flooding. The 10 CFR 50.54(f) letter included a request for licensees under 10 CFR Part 50 to reevaluate the flood hazards at their sites against present-day regulatory guidance and methodologies being used for Early Site Permit (ESP) and Combined License reviews.

On May 11, 2012 (ADAMS Accession No. ML12097A509), the NRC issued a prioritization plan that established an external flooding hazard reevaluation schedule for each licensee. The NRC's prioritization plan initially placed Salem Nuclear Generating Station (Salem), Units 1 and 2 in Category 1, establishing a flood hazard reevaluation due date of March 12, 2013, because Salem is co-located with an ESP site. As described in PSEG's extension request letter dated March 12, 2013 (ADAMS Accession No. ML13072A033), changing NRC expectations regarding storm surge modeling methods prompted PSEG to reanalyze hurricane-related events in support of the ESP application. The storm surge reanalysis resulted in an impact to the Salem flood hazard reevaluation schedule. By letter dated April12, 2013 (ADAMS Accession No. ML13095A281), the NRC approved PSEG's request to extend the Salem flood hazard reevaluation submittal due date to March 12, 2014.

By letter dated March 11, 2014 (ADAMS Accession No. ML14071A401), PSEG provided the requested flood hazard reevaluation for Salem. The NRC staff has reviewed the Salem flood hazard reevaluation by PSEG and determined that additional information is needed as set forth below.

REQUEST FOR ADDITIONAL INFORMATION The NRC staff requests that the licensee provide the following figures and files used in the development of the Flooding Hazard Reevaluation Report (FHRR). Input and output files are requested in their native file format (*.xlsx, *.out, etc.). Adobe Acrobat Portable Document Files (PDFs) are not requested to be submitted unless specifically requested in that format. The NRC staff also requests that the licensee provide clarification regarding the scope of, and input parameters for, the integrated assessment.

Enclosure

Local Intense Precipitation, Riverine Flooding, and Dam Failure The NRC staff requests that the licensee provide the following figures and files used in the development of the FHRR:

1. Local Intense Precipitation Flood

• Input files for FL0-20 modeling (in native FL0-20 format)

• Minimum output: Summary. out file from FL0-20 modeling (in native FL0-20 format)

• Sufficient output from FL0-20 modeling to review licensee's results independent of the FHRR and electronic reading room modeling (in native FL0-20 format):

o MAXWSELEV.out o OEPTH.out o CHVOLUME.out o CHANMAX.out o CROSSMAX.out o HYCROSS.out o CROSSQ.out o HYCHAN.out o HYOROSTRUCT.out o VEL TIMEC.out o VEL TIMEFP.out o TIMOEP.out

2. Riverine Probable Maximum Flood (PMF)

• HEC-HMS input files (in native format)

• HEC-RAS input file (in native format)

• Calibration sets for HEC-HMS and HEC-RAS (in native format)

• Sufficient output to review licensee's results independent of FHRR and electronic reading room (ERR) (in native format) o HEC-HMS *.OSS o HEC-HMS *.OUT o HEC-RAS *.0##- output files o HEC-RAS *.R##- restart files (depending on how the initial conditions are specified) o HEC-RAS *.OSS

3. Dam Breach Flood

• HEC-HMS input files (in native format)

• HEC-RAS input files (in native format)

• Sufficient output to review licensee's results independent of FHRR and ERR (in native format) o HEC-HMS *.DSS o HEC-HMS *.OUT o HEC-RAS *.0##- output files o HEC-RAS *.R##- restart files (depending on how the initial conditions are specified) o HEC-RAS *.DSS Storm Surge NRC staff requests that the licensee provide the following additional information related to the evaluation of storm surge:

4. The NRC staff requests that the licensee provide the ADCIRC+SWAN models files as listed below, that were applied in the development of probable maximum storm surge. Input and output files are requested in their native file format (*.xlsx, *.out, etc.). PDFs of files are requested to not be submitted unless specifically requested in that format.

1. Files Description 1 Fort.13 ADCIRC+SWAN Nodal Attribute File 2 Fort.14 ADCIRC+SWAN Grid and Boundary Information File A DCI RC+SW AN Model Parameter and Periodic Boundary Condition 3 Fort.15 File 4 Fort.22 Wind input files developed for storms simulated in ADCIRC 5 Land class data Defines land use in mesh region Reports developed the document mesh development {changes from 6 Documentation FEMA coastal study mesh) and model validation and execution Storm Validation Storm validation forcing files (wind/pressure, fort.22) and water level 7

data and wave measurements for comparison

5. The NRC staff requests the licensee provide the information listed below related to the probabilistic evaluation of storm surge. In conjunction with the items below, the staff requests that the licensee include supporting information to assist the staff in identifying relevant information provided as part of the request for additional information (RAI) response such as provision of (1) indices describing the content of various input/output files and (2) field titles (e.g., column headers and row identifiers) for datasets and tables of information. Input and output files, as well as any supporting information, are requested in their native file format (e.g., *.xlsx, *.txt, etc.). Tables of information are requested to be provided in a format suitable for import into mathematical software packages (e.g., as

delimited text files or spreadsheets). PDFs of files are not requested to be submitted unless specifically requested in that format.

a) The licensee is requested to provide a tabulation of input data used to support development of probability distributions for relevant storm parameters and (if applicable) examination of parameter correlations. This includes the HURDAT database pre- and post-application of any filters such as the line-crossing approach used to screen historical hurricanes for evaluation of the distribution for central pressure and associated sampling uncertainty. In addition, the licensee's FHRR references Federal Emergency Management Agency (FEMA) studies as the basis for the following information: (1) historical storm rate, (2) distribution for Rmax*

(3) distribution for v1 , and (4) storm track distribution. If the supporting data used to derive these distributions is available to the licensee, the licensee is requested to provide a tabulation of input data used to support development of the above distributions and storm rate.

b) The licensee is requested to provide computer codes (including subroutines and supporting calculations) and input/output files associated with processing data, computing probability distributions for storm parameters, examining parameter correlations, generating the response surface, developing parameters for the error term distribution, performing the JPM integration, and evaluating sampling uncertainty.

c) The licensee is requested to provide a tabulation of the complete response surface (including values generated using numerical models, the pressure-differential relationship, interpolation, and extrapolation) for each combination of storm parameters. In addition, the licensee is requested to identify the method (e.g.,

numerical model, pressure-differential relationship, interpolation/extrapolation) used to generate each value.

d) The licensee is requested to provide a tabulation of the probability mass functions associated with each storm parameter and error term.

e) The licensee is requested to provide a tabulation of the joint probability mass functions associated with each combination of storm parameters.

• .. ML14168A242 *via email OFFICE NRR/DORULPL 1-2/PM NRR/DORL/LPL 1-2/LA NRO/DSEA/BC NRR/DORL/LPL 1-2/BC NRRIDORL/LPL 1-2/PM NAME Jlamb ABaxter CCook* MKhanna JLamb DATE 06/17/2014 6/25/14 05/29/2014 06/25/2014 06/28/2014