ML18270A158
| ML18270A158 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 10/10/2018 |
| From: | Lisa Regner Plant Licensing Branch IV |
| To: | Entergy Operations |
| Regner, L M, 301-415-1906 | |
| References | |
| EPID L-2017-LRM-0046 | |
| Download: ML18270A158 (4) | |
Text
LICENSEE:
FACILITY:
SUBJECT:
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 10, 2018 Entergy Operations, Inc.
River Bend Station, Unit 1
SUMMARY
OF AUGUST 23, 2018, MEETING WITH ENTERGY OPERATIONS, INC. ON ITS INTENT TO CHANGE NEUTRON ABSORBERS FOR THE RIVER BEND STATION, UNIT 1 SPENT FUEL POOL (EPID L-2018-LRM-0046)
On August 23, 2018, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Entergy Operations, Inc. (Entergy, the licensee) at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss a proposed change to the spent fuel pool (SFP) criticality analysis to credit a new type of neutron absorber in the SFP for River Bend Station, Unit 1 (RBS). The meeting notice and agenda dated August 1, 2018, are available in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML18229A024. Portions of this meeting were closed to the public to allow the discussion of proprietary information. A list of meeting attendees is enclosed.
The licensee presented information in its slideshow (ADAMS Accession No. ML18275A272).
Entergy provided an overview of its proposed change to install NETCO's SNAP-IN neutron absorber inserts into the RBS SFP storage cells and its proposed change to the SFP criticality analysis. Several aspects of the previous pre-submittal meeting, held on October 12, 2017, were repeated. The October 2017 meeting summary is available at ADAMS Accession No. ML17303A042 and the handouts are at Accession No. ML17283A310.
During the public portion of the meeting, the licensee provided the criticality analysis overview, the implementation strategy and its proposed license changes including a new technical specification {TS) in Section 5 of the RBS TSs. The licensee also stated that its installation and long-term monitoring of the neutron absorber inserts would satisfy commitments made to the NRC as part of the ongoing license renewal review. The licensee stated that it would follow Nuclear Energy Institute (NEI) 16-03-A, "Guidance for Monitoring of Fixed Neutron Absorbers in Spent Fuel Pools," Revision 0, dated May 2017 (ADAMS Accession No. ML17263A133). The NRC staff.approved the use of NEl-16-03-A, Revision 0, by letter dated October 5, 2017 (ADAMS Accession No. ML 17262AOOO).
Entergy stated that three different types of monitoring coupons will be used to monitor for deformities and degradation, with several already installed in the RBS SPF. Further, the licensee plans to begin installation of the inserts in June of 2019 under Title 10 of the Code of Federal Regulations (10 CFR) Section 50.59, "Changes, tests, and experiments." The licensee will not credit the use of the inserts in its criticality analysis until the NRC staff makes its decision on the license amendment request. The licensee plans to submit the request by September 2018. The NRC staff stressed that due to the complexity of the review of the new criticality analysis the licensee should provide the NRC staff as much time as possible to complete its review prior to the licensee's need date, and no less than the normal 1-year review timeframe.
Entergy discussed the proposed change in criticality analysis methodology and stated that it will follow the most current NRC and industry guidance, including the Division of Safety Systems Interim Staff Guidance, (DSS-ISG) DSS-ISG-2010-01, Revision 0, "Staff Guidance Regarding the Nuclear Criticality Safety Analysis for Spent Fuel Pools," September 2011; and NEI 12-16, "Guidance for Performing Criticality Analyses of Fuel Storage at Light-Water Reactor Power Plants," Revision 3, dated March 2018 (ADAMS Accession Nos. ML110620086 and ML18088B400, respectively). The RBS criticality analysis methodology will address the current fuel type (Global Nuclear Fuel 2 (GNF2)), the next potential fuel product (GNF3), and all legacy fuel. The licensee also stated that the analysis will include evaluations of several types of abnormal operations (e.g., mislead of fuel).
The NRC staff queried in what ways the criticality analysis methodology would deviate from the guidance. During the closed portion of the meeting, the licensee discussed deviations from the guidance including a more conservative approach to analysis uncertainty quantification. The NRC staff requested that Entergy discuss the upper containment pool and impacts of this change. The licensee also discussed the computer code calculations used in the criticality analysis and parameters used as the design basis fuel bundle. The NRC staff and Entergy discussed the analyzed tolerances, biases and uncertainties. The NRC staff recommended that Entergy ensure it utilized the checklist in NEI 12-16, Revision 3 to ensure all guidelines were followed including consideration of temperature changes in the SFP and loss of SFP cooling, and dynamic handling, rack shifts, and seismic effects.
Members of the public were not in attendance. Public Meeting Feedback forms were not received.
Please direct any inquiries to me at 301-415-1906 o~e-mail at Lisa.Regner@nrc.gov.
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Docket No. 50-458
Enclosures:
List of Attendees cc: Listserv
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Regner, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
LIST OF ATTENDEES AUGUST 23, 2018, MEETING WITH ENTERGY OPERATIONS, INC.
REGARDING INTENT TO CHANGE NEUTRON ABSORBERS FOR THE SPENT FUEL POOL FOR RIVER BEND STATION, UNIT 1 DOCKET NO. 50-458 NAME ORGANIZATION Lisa Regner U.S. Nuclear Regulatory Commission (NRC)
Scott Krepel NRC Brian Wittick NRC Kent Wood NRC Alex Chereskin NRC Matt Yoder NRC Alan Huynh NRC Bob Pettis NRC Brian Jones Entergy Operations, Inc.
Don Lomax Entergy Operations, Inc.
Brian Holman Entergy Operations, Inc.
Frank Philpot Entergy Operations, Inc.
Jerrod Ewing Entergy Operations, Inc.
Chris Kmiec Global Nuclear Fuels (GNF)
Scott Pfeffer GNF Brian Rickard Curtis Wright Constantin lllioiu Curtis Wright Enclosure
Meeting Notice ML18229A024; TWertz, NRR KWood, NRR AChereskin, NRR MYoder, NRR AHuynh, NRR SKrepel, NRR MO'Banion, NRR TWertz, NRR Meetin Summa ; ML18270A158 Handouts ML18232A556
- via email OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/LA NRR/DSS/SNPB/BC*
NRR/DMLR/MCCB/BC*
PBlechman w/comment NAME LRegner slides Rlukes (SKrepel for)
SBloom DATE 9/25/18 10/4/18 9/27/18 9/27/18 OFFICE NRR/DE/ESEB/BC NRR/DORL/LPL4/BC NRR/DORL/LPL4/PM NAME BWittick RPascarelli LRegner DATE 9/27/18 10/10/18 10/10/18