ML20030C204
| ML20030C204 | |
| Person / Time | |
|---|---|
| Site: | 07201031 |
| Issue date: | 01/31/2020 |
| From: | Bernie White Storage and Transportation Licensing Branch |
| To: | Christopher Regan Division of Fuel Management |
| BHWhite NMSS/DFM/STL 415.6577 | |
| Shared Package | |
| ML20030C203 | List: |
| References | |
| EPID L-2019-LLA-0220 | |
| Download: ML20030C204 (4) | |
Text
January 31, 2020 MEMORANDUM TO: Christopher Regan, Deputy Director Division of Fuel Management Office of Nuclear Material Safety and Safeguards FROM: Bernard White, Senior Project Manager /RA/
Storage and Transportation Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards
SUBJECT:
SUMMARY
OF DECEMBER 11, 2019, PARTIALLY CLOSED MEETING WITH NAC INTERNATIONAL TO DISCUSS AMENDMENT NUMBER 9 TO THE MAGNASTOR SPENT FUEL STORAGE CASK Purpose NAC International Inc. (NAC), requested the partially-closed meeting to provide the U.S.
Nuclear Regulatory Commission (NRC) staff an overview of its application for Amendment No. 9 to Certificate of Compliance No. 1031 for the Modular Advanced Generation Nuclear All-Purpose Storage (MAGNASTOR) cask. NAC submitted the application on October 9, 2019 (see Agencywide Documents Access and Management System (ADAMS) Accession No. ML19296C938).
Background
On December 11, 2019, a partially-closed meeting was held in Rockville, Maryland, with the NRC staff at the request of NAC to discuss Amendment No. 9 for the MAGNASTOR storage system. The meeting was noticed on November 22, 2019 (see ADAMS Accession No. ML19326C273). The list of meeting attendees, including those participating via telephone, is provided as Enclosure 1. The non-proprietary presentation slides are provided as Enclosure No. 2, the proprietary presentation slides are provided as Enclosure No. 3.
Discussion During the open portion of the meeting, NAC discussed the scope of the application, its reorganization of the technical specifications, and the timeframe NAC requested for approval.
During the closed portion of the meeting NAC discussed implementation of the amendment at Three Mile Island (TMI), the new concrete overpack design, and provided an overview of the fuel loading patterns and the criticality safety, shielding, and thermal evaluations that form the safety basis for this amendment.
CONTACT: Bernard White, NMSS/DFM (301) 415-6577
C. Regan 2 This amendment supports dry cask loading and subsequent decommissioning of TMI Unit 1. To support the fuel loading at TMI, NAC requested the addition of a modified Babcock and Wilcox hybrid fuel assembly (BW15H2) which increases the enrichment limit; a new hybrid fuel assembly, the (BW15H5); four new heat load zoning patterns to accommodate higher heat load assemblies from the last core; a new concrete overpack; and conditions for transfer and loading of the fuel assemblies.
In reorganizing the technical specifications, NAC stated that it consolidated duplicative information in the technical specifications and, as much as possible, condensed information into fewer figures and tables. NAC stated that only duplicative information was deleted. NAC stated that it consolidated information on undamaged and damaged pressurized water reactor fuel and summarized loading patterns in a single table referencing a single fuel basket figure. In addition, NAC stated that a new table has been created to make it easier for users to find the applicable cool time tables.
NAC stated that Exelon is planning on loading as soon as possible and requested that the amendment be effective by the end of March 2021. NRC stated that its current schedule, which includes a single request for additional information, will allow for the certificate to be effective by the end of March 2021.
In the proprietary discussion, NAC provided an overview of the new concrete overpack and discussed how and why it differs from the currently approved designs. NAC proceeded to discuss the technical basis for requesting approval. NAC discussed its nuclear analysis including the criticality safety analysis and results for the new hybrid fuel assembly, the increased enrichment, the minimum soluble boron during loading, and the non-fuel hardware.
Given the new fuel assembly type and overpack, NAC discussed the methodology and results for its dose rate analyses and how these analyses differ from previous analyses for other approved concrete casks. Next, NAC discussed its thermal evaluations and results including an overview of the methodology and heat load requirements for determining the new loading patterns.
Docket No. 72-1031 EPID No. L-2019-LLA-0220
Enclosures:
- 1. Meeting Attendees
- 2. Non-Proprietary Slides
- 3. Proprietary Slides
ML20030C204 Proprietary Slides ADAMS Accession No.: ML20030C207 Non-Proprietary Slides ADAMS Accession No.: ML20030C206 OFFICE DFM DFM DFM NAME BWhite WWheatley DDoyle DATE 01/06/2020 01/08/2020 01/31/2020 MEETING ATTENDEES Meeting
Title:
SUMMARY
OF DECEMBER 11, 2019, PARTIALLY CLOSED MEETING WITH NAC INTERNATIONAL TO DISCUSS AMENDMENT NUMBER 9 TO THE MAGNASTOR SPENT FUEL STORAGE CASK
Participants:
NAC International and the NRC Date: December 11, 2019 NAME AFFILIATION In attendance Bernie White NRC/NMSS/DFM Marc Griswold NAC Mike Yaksh NAC George Carver NAC Allan Altera NAC Yong Kim NRC/NMSS/DFM Jorge Solis NRC/NMSS/DFM Eli Goldfeiz NRC/NMSS/DFM Jeremy Smith NRC/NMSS/DFM John Wise NRC/NMSS/DFM Haile Lindsay NRC/NMSS/DFM Ghani Zigh NRC/RES/DSA Yoira Diaz-Sanabria NRC/NMSS/DFM Dan Doyle NRC/NMSS/DFM Stephen Minnick Exelon-TMI Holger Pfeifer NAC Wren Fowler NAC Travis Tate NRC/NMSS/DFM Meraj Rahimi NRC/NMSS/DFM Phone Attendees Bob Brady TMI Carlyn Green Ux Consulting James Tusar Exelon Kim Hobbs Exelon Enclosure 1