RBG-47949, Supplement to License Amendment Request Criticality Safety Analysis, Technical Specifications 4.3.1, Criticality, and Technical Specification 5.5, Programs and Manuals
| ML19155A226 | |
| Person / Time | |
|---|---|
| Site: | 05000548 |
| Issue date: | 06/04/2019 |
| From: | Gaston R Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RBG-47949 | |
| Download: ML19155A226 (2) | |
Text
Entergy Operations, Inc.
1340 Echelon Parkway Jackson, MS 39213 Tel 601-368-5138 Ron Gaston Director, Nuclear Licensing 10 CFR 50.90 RBG-47949 June 4, 2019 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Supplement to License Amendment Request Criticality Safety Analysis, Technical Specifications 4.3.1, Criticality, and Technical Specification 5.5, Programs and Manuals River Bend Station, Unit 1 NRC Docket No. 50-548 Renewed Facility Operating License No. NPF-47
Reference:
Entergy Operations, Inc. (Entergy) letter to U.S. Nuclear Regulatory Commission (NRC), "License Amendment Request Criticality Safety Analysis, Technical Specifications 4.3.1, Criticality, and Technical Specification 5.5, Programs and Manuals," dated October 24, 2018 (ADAMS Accession Nos. ML18297A103 and ML18297A114)
In the referenced letter, Entergy Operations, Inc. (Entergy) submitted a License Amendment Request (LAR) to credit new NETCO-SNAP-IN rack inserts for criticality control at River Bend Station, Unit 1 (RBS), using a new Criticality Safety Analysis (CSA) methodology. This letter provides clarifying information pertaining to installation of the inserts, prior to NRC approval of the LAR, but does not affect or impact the LAR. No NRC action is requested or required.
Entergy has initiated the installation of the NETCO-SNAP-IN rack inserts at RBS in accordance with 10 CFR 50.59, using the existing CSA methodology. As described in the referenced LAR, Entergy will not credit the inserts using the new CSA methodology for reactivity control until the LAR is approved.
Based on the engineering analysis for the installation of the new rack inserts, using the existing CSA methodology, Entergy has identified the need to compensate for the water displacement that occurs when the inserts are installed. As a result, Entergy will credit, in the existing CSA, a small percentage of the boron in the new rack inserts for reactivity control.
RBG-47949 Page 2 of 2 Entergy has evaluated this as a compensatory measure in accordance with 10 CFR 50.59, and documented this compensatory measure in the existing operability evaluation for the spent fuel storage racks.
This letter does not contain any new commitments.
If you require additional information, please contact Mr. Tim Schenk at (225) 381-4177 or tschenk@entergy.com.
In accordance with 10 CFR 50.91(b)(1), Entergy is notifying the State of Louisiana and the State of Texas by transmitting a copy of this letter to the designated State Official.
I declare under penalty of perjury, the foregoing is true and correct. Executed on June 4, 2019.
Respectfully, Ron Gaston RWG/baj cc: NRC Regional Administrator - Region IV NRC Project Manager - River Bend Station NRC Senior Resident Inspector - River Bend Station Louisiana Department of Environmental Quality Public Utility Commission of Texas