ML092580158

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Audit Plan for Review of the Addendum 3-Dimensional Finite Element Analysis for the Oyster Creek Nuclear Generating Station Containment Drywell Shell
ML092580158
Person / Time
Site: Oyster Creek
Issue date: 09/15/2009
From: Allen Hiser
Division of License Renewal
To:
Division of License Renewal
Regner L M, NRR/DLR, 415-1906
References
Download: ML092580158 (7)


Text

September 15, 2009 MEMORANDUM TO: File FROM: Allen L. Hiser, Jr., Senior Technical Advisor /RA/

Division of License Renewal Office of Nuclear Reactor Regulation

SUBJECT:

AUDIT PLAN FOR REVIEW OF THE ADDENDUM 3-DIMENSIONAL FINITE ELEMENT ANALYSIS FOR THE OYSTER CREEK NUCLEAR GENERATING STATION CONTAINMENT DRYWELL SHELL This Memorandum makes publicly available the audit plan for the staffs review of the addendum 3-dimensional finite element analysis for the Oyster Creek Nuclear Generating Station containment drywell shell (see enclosure).

Docket No. 50-219

Enclosure:

As stated cc w/encl: See next page

September 15, 2009 MEMORANDUM TO: File FROM: Allen L. Hiser, Jr., Senior Technical Advisor /RA/

Division of License Renewal Office of Nuclear Reactor Regulation

SUBJECT:

AUDIT PLAN FOR REVIEW OF THE ADDENDUM 3-DIMENSIONAL FINITE ELEMENT ANALYSIS FOR THE OYSTER CREEK NUCLEAR GENERATING STATION CONTAINMENT DRYWELL SHELL This Memorandum makes publicly available the audit plan for the staffs review of the addendum 3-dimensional finite element analysis for the Oyster Creek Nuclear Generating Station containment drywell shell (see enclosure).

Docket No. 50-219

Enclosure:

As stated cc w/encl: See next page DISTRIBUTION: See next page ADAMS Accession No. ML092580158 OFFICE LA:DLR SL:DLR BC:RPB1:DLR SL:DLR NAME SFigueroa AHiser DPelton AHiser DATE 09/15/09 09/15/09 09/15/09 09/15/09

OFFICIAL RECORD COPY Memorandum to File from A. Hiser, dated September 15, 2009 DISTRIBUTION:

SUBJECT:

AUDIT PLAN FOR REVIEW OF THE ADDENDUM 3-DIMENSIONAL FINITE ELEMENT ANALYSIS FOR THE OYSTER CREEK NUCLEAR GENERATING STATION CONTAINMENT DRYWELL SHELL HARD COPY:

DLR RF E-MAIL:

PUBLIC AHiser DPelton RidsNrrDlr RidsNrrDlrRpb1 RidsNrrDlrRpb2 RidsNrrDlrRer1 RidsNrrDlrRer2 RidsNrrDlrRerb RidsNrrDciCvib RidsNrrDciCpnb RidsNrrDraAfpb RidsNrrDeEmcb RidsNrrDeEeeb RidsNrrDssSrxb RidsNrrDssSbpb RidsNrrDssScvb RidsOgcMailCenter RidsOpaMailResource LRegner DTifft, RI NMcNamara, RI DScrenci, RI RConte, RI BHarris, OGC

Oyster Creek Nuclear Generating Station cc:

Site Vice President - Oyster Creek Director - Licensing and Regulatory Affairs Nuclear Generating Station AmerGen Energy Company, LLC AmerGen Energy Company, LLC Correspondence Control P.O. Box 388 P.O. Box 160 Forked River, NJ 08731 Kennett Square, PA 19348 Senior Vice President- Operations Support Manager Licensing - Oyster Creek AmerGen Energy Company, LLC Exelon Generation Company, LLC 4300 Winfield Road Correspondence Control Warrenville, IL 60555 P.O. Box 160 Kennett Square, PA 19348 Kathryn M. Sutton, Esquire Morgan, Lewis, & Bockius LLP Ron Bellamy, Region I 1111 Pennsylvania Avenue, NW U.S. Nuclear Regulatory Commission Washington, DC 20004 475 Allendale Road King of Prussia, PA 19406-1415 Patrick Mulligan, Chief Bureau of Nuclear Engineering Correspondence Control Desk New Jersey Department of AmerGen Energy Company, LLC Environmental Protection 200 Exelon Way, KSA 1-N-1 25 Arctic Parkway Kennett Square, PA 19348 Ewing, NJ 08638 Plant Manager Vice President - Licensing and Oyster Creek Nuclear Generating Station Regulatory Affairs AmerGen Energy Company, LLC AmerGen Energy Company, LLC P.O. Box 388 4300 Winfield Road Forked River, NJ 08731 Warrenville, IL 60555 Associate General Counsel Regional Administrator, Region I Exelon Generation Company, LLC U.S. Nuclear Regulatory Commission 4300 Winfield Road 475 Allendale Road Warrenville, IL 60555 King of Prussia, PA 19406-1415 Chief Operating Officer (COO)

Mayor of Lacey Township AmerGen Energy Company, LLC 818 West Lacey Road 4300 Winfield Road Forked River, NJ 08731 Warrenville, IL 60555 Manager Regulatory Assurance Senior Vice President - Mid-Atlantic Oyster Creek Generating Station Operations AmerGen Energy Company, LLC AmerGen Energy Company, LLC P.O. Box 388 200 Exelon Way, KSA 3-N Forked River, NJ 08731 Kennett Square, PA 19348 Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 445 Forked River, NJ 08731

Audit Plan Review of the Addendum 3-Dimensional Finite Element Analysis for the Containment Drywell Shell Oyster Creek Nuclear Generating Station September 18, 2009

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Background===

On January 22, 2009, Exelon Nuclear submitted the results of a 3-dimensional finite element analysis (3-D FEA) using modern methods to determine the margin of the containment drywell shell of Oyster Creek Nuclear Generating Station, as compared to the requirements of the American Society of Mechanical Engineers (ASME) Code. On September 9, 2009, Exelon Nuclear submitted an addendum to the January 22 submittal, incorporating results from an updated analysis which modifies two items related to an analytical assumption. The September 9 letter indicates that Exelon is providing this information to ensure the NRC staff and the Advisory Committee on Reactor Safeguards (ACRS) have the latest relevant information.

Audit Bases The staff will perform an audit of the calculations used to produce the results described in the September 9, 2009, addendum to the 3-D FEA of the Oyster Creek drywell shell.

Audit Scope The audit will focus on an assessment of the 3-D FEA described in the addendum dated September 9, 2009. The staff will review the September 2009 addendum calculations and supporting documentation to ensure that the analysis was based on realistic, but conservatively biased assumptions and that it was conducted using good engineering practices and judgment.

Necessary Information and Materials The staff will review the calculations, including modeling and simplifying assumptions, and any documents used to develop or support the calculations.

Team Assignments Organization Name Function NRC/NRR/DLR Allen Hiser Project Team Leader NRC/NRR/DLR/RER2 Hans Ashar Reviewer NRC/NRR/DE Kamal Manoly Reviewer Audit Logistics September 18, 2009

- Entrance briefing at 10:00 AM

- Begin review at 10:15 AM

- Exit briefing at 3:00 PM Exelon Corporation 101 Constitution Avenue, NW Suite 400 East Washington, DC 20001

Deliverables An audit summary report shall be placed on the docket by October 15, 2009.

References January 22, 2009 Results of Three-Dimensional Structural Analysis of the Oyster Creek Drywell Shell, Associated with AmerGens License Renewal Application (TAC No. MC7624)

September 9, 2009 Updated Information Regarding the Results of the Structural Analysis of the Oyster Creek Drywell Shell, Performed in Support of License Renewal