ML031550207

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Summary of Meeting with Southern California Edison Co Regarding Upgrades to San Onofre Nuclear Generating Station Unit 1 Turbine Gantry Crane
ML031550207
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 06/03/2003
From: Huffman W
NRC/NMSS/DWM/DCB
To: Gillen D
NRC/NMSS/DWM/DCB
References
-RFPFR
Download: ML031550207 (5)


Text

June 3, 2003 MEMORANDUM TO: Dan Gillen, Chief Decommissioning Branch Division of Waste Management, NMSS FROM: William C. Huffman, Project Manager /RA/

Section A Decommissioning Branch Division of Waste Management, NMSS

SUBJECT:

SUMMARY

OF THE MAY 22, 2003, MEETING WITH SOUTHERN CALIFORNIA EDISON COMPANY REGARDING UPGRADES TO THE SAN ONOFRE NUCLEAR GENERATING STATION UNIT 1 TURBINE GANTRY CRANE On May 22, 2003, a public meeting was held at the Nuclear Regulatory Commission (NRC) offices in Rockville, Maryland, with representatives of the Southern California Edison Company to discuss a planned upgrade to the San Onofre Nuclear Generating Station Unit 1 (SONGS-1) turbine gantry crane.

The upgrade is needed to support lifting and movement of a fully loaded transfer cask containing spent fuel from the SONGS-1 spent fuel pool into dry cask storage at the SONGS independent spent fuel storage installation (ISFSI). The licensee refers to the upgrade of the turbine gantry crane, together with associated structures and systems, as the SONGS-1 Cask Handling System Upgrade.

The scope of the upgrade involves increasing the load rating on the crane from 100 tons to 105 tons; replacing the existing crane trolley with a qualified single failure proof trolley; and upgrading the building structure supporting the crane. The seismic classification of the crane, building support structure, and trolley will all be upgraded to seismic category A.

The upgrade will conform with the guidance in NUREG-0612, Control of Heavy Loads at Nuclear Power Plants, and NUREG-0554, Single Failure Proof Cranes. The licensee provided a qualitative assessment of the upgrade against guidelines in these NUREGs during the meeting. In addition, the licensee discussed the details of the structural and seismic modifications needed for both the crane and building. The licensee also addressed the computer programs and assumptions used to perform various mechanical, structural, and seismic analyses. The NRC staff has previously approved the mechanical, structural, and seismic analysis of the crane trolley via a licensing topical report. The trolley is being procured from the vendor Ederer.

The licensee provided consequence analysis results from a transfer cask drop (although it is not necessary to postulate a cask drop for a single failure proof crane). The hypothetical dose consequences are limited to damage to the fuel assemblies in the transfer cask. This is because the transfer cask is not moved over the spent fuel pool and a transfer cask drop cannot drain the spent fuel pool (due to a separation of the cask loading area from the spent

fuel pool by a weir wall). Furthermore, since the SONGS-1 site is decommissioning, there are no other structures, systems, and components of concern within the load path of the crane and transfer cask operations. The consequences of a transfer cask drop loaded with Unit 1 spent fuel is a very small fraction of the plant design basis limits.

The licensee plans to submit (for NRC approval) an amendment to the SONGS-1 Defueled Safety Analysis Report that documents the modifications of the crane against the NRC issued guidance in NUREG-0612 and NUREG-0554. The licensee expects to submit the amendment by August 15, 2003, and will be requesting a three-month NRC review. The licensee notes that a delay in the review has the potential to impact the operating plants (Units 2 and 3).

Specifically, the Unit 1 spent fuel pool must be offloaded to support expansion of the site ISFSI and subsequent offloading of fuel from Units 2 and 3 spent fuel pools.

Staff questions during the meeting focused on details related to the seismic analyses, quality assurance, and nondestructive examination of the existing crane structure and welds.

The meeting attendance list and a copy of the slides used by the licensee for their presentation is attached. This meeting was noticed on May 5, 2003. No proprietary information was disseminated or presented at this meeting. No regulatory decisions were requested or made.

Docket No. 50-206 Attachments: Attendance List Presentation Slides (ADAMS Accession No. ML031480478) cc: Service List

ML031480478) cc: Service List DISTRIBUTION:

PUBLIC DWM r/f JGreeves WReamer DGillen MThaggard CCraig CBurhkhalter SteveJones JRajan SOConner DSolorio RidsNmssDwmDcb RidsOgcRp RidsAcrsAcnwMailCenter RidsNmssPMDOrlando RidsNmssPMWHuffman RidsRgn4MailCenter SNalluswami MEETING

SUMMARY

PACKAGE ADAMS ACCESSION NUMBER:

OFFICE DCB/PM DCB/LA DCB/SC NAME WHuffman CBurkhalter MThaggard DATE 6/3/03 6/3/03 6/3/03 C:\ORPCheckout\FileNET\ML031550207.wpd San Onofre Nuclear Generating Station, Unit 1 cc:

Dr. Raymond Waldo, Plant Manager Resident Inspector/San Onofre NGS Nuclear Generation c/o U.S. Nuclear Regulatory Commission Southern California Edison Company P.O. Box 4329 San Onofre Nuclear Generating Station San Clemente, CA 92674 P.O. Box 128 San Clemente, CA 92674-0128 Mayor City of San Clemente Chairman, Board of Supervisors 100 Avenida Presidio County of San Diego San Clemente, CA 92672 1600 Pacific Highway, Room 335 San Diego, CA 92101 Mr. Dwight E. Nunn, Vice President Southern California Edison Company Mr. Douglas K. Porter, Esq. San Onofre Nuclear Generating Station Southern California Edison Company P.O. Box 128 2244 Walnut Grove Avenue San Clemente, CA 92674-0128 Rosemead, CA 91770 Mr. James D. Boyd, Commissioner Mr. David Spath, Chief California Energy Commission Division of Drinking Water and 1516 Ninth Street (MS 31)

Environmental Management Sacramento, CA 95814 California Department of Health Services P.O. Box 942732 Mr. Joseph J. Wambold, Vice President Sacramento, CA 94234-7320 Southern California Edison Company San Onofre Nuclear Generating Station Regional Administrator, Region IV P.O. Box 128 U.S. Nuclear Regulatory Commission San Clemente, CA 92764-0128 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Mr. A. Edward Scherer, Manager Nuclear Oversight and Regulatory Affairs Mr. Michael Olson Southern California Edison San Diego Gas & Electric Company San Onofre Nuclear Generating Station P.O. Box 1831 P.O. Box 128 San Diego, CA 92112-4150 San Clemente, CA 92674-0128 Mr. Ed Bailey, Radiation Program Director Radiologic Health Branch California Department of Health Services P.O. Box 942732 (MS 178)

Sacramento, CA 94327-7320

Attendance List For Meeting with Southern California Edison Company Regarding Upgrade of the Turbine Gantry Crane at SONGS-1 May 22, 2003 Name Organization James Reilly Southern California Edison Company Dave Pilmer Southern California Edison Company Torrey Yee Southern California Edison Company Paul Gyswyt Southern California Edison Company Riyad Qashu Southern California Edison Company Mark Thaggard Decommissioning Branch, NMSS, NRC Bill Huffman Decommissioning Branch, NMSS, NRC Cornelia Burkhalter Decommissioning Branch, NMSS, NRC Steve Jones Plant Systems Branch, NRR, NRC Hanry Wagage Plant Systems Branch, NRR, NRC Jai Rajan Mechanical and Civil Engineering Branch, NRR, NRC Steve OConnor Licensing Section, Spent Fuel Project Office, NMSS, NRC