RS-25-030, Enclosure B: Dresden Nuclear Power Station, Units 2 and 3, Subsequent License Renewal Application - Commitment List Update
| ML25051A256 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/20/2025 |
| From: | Constellation Energy Generation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML25051A253 | List: |
| References | |
| RS-25-030 | |
| Download: ML25051A256 (1) | |
Text
February 20, 2025 Enclosure B Page 1 of 4 Enclosure B Dresden Nuclear Power Station, Units 2 and 3, Subsequent License Renewal Application Commitment List Update Introduction This enclosure identifies the commitments made in the document and serves as an update to the Dresden Nuclear Power Station SLRA Appendix A, Section A.5, Subsequent License Renewal Commitment List. Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for informational purposes and do not constitute regulatory commitments.
The changes to the Dresden SLRA Appendix A, Section A.5, Subsequent License Renewal Commitment List, (Table A.5) are a result of this SLRA Supplement.
The Enclosure B pages included here are identical to the corresponding pages in Dresden SLRA Appendix A, Section A.5, which were previously included in Enclosure A.
To facilitate understanding, relevant portions of the previously submitted Subsequent License Renewal Commitment List have been repeated in this Enclosure, with revisions clearly indicated. Previously submitted information is shown in normal font, while additions due to this submittal are highlighted with bolded italics for the inserted text, and strikethroughs for the deleted text.
February 20, 2025 Enclosure B Page 2 of 4 Enhancement 1 in SLRA Table A.5, Subsequent License Renewal Commitment List, Item Number 10, Bolting Integrity, page A-73, is revised as shown below:
TABLE A.5 - SUBSEQUENT LICENSE RENEWAL COMMITMENT LIST NO. PROGRAM OR TOPIC COMMITMENT IMPLEMENTATION SCHEDULE SOURCE 10 Bolting Integrity Bolting Integrity is an existing program that will be enhanced to:
- 1.
Revise procedure guidance to clarify that the use of lubricants that contain molybdenum disulfide (MoS2) is prohibited at DNPS for bolts in the scope of license renewal. Clarify that the recommended guidance for proper selection of bolting material and lubricants, and appropriate installation torque or tension to prevent or minimize loss of bolting preload and cracking of high-strength bolting is a requirement at DNPS in accordance with the guidelines provided in EPRI TR 104213.
Program will be enhanced no later than six months prior to the subsequent period of extended operation.
Section A.2.1.10 CEG Letter DNPS SLRA Supplement No. 1, dated February 20, 2025 Enhancement 5 in SLRA Table A.5, Subsequent License Renewal Commitment List, Item Number 10, Bolting Integrity, page A-74, is revised as shown below:
TABLE A.5 - SUBSEQUENT LICENSE RENEWAL COMMITMENT LIST NO. PROGRAM OR TOPIC COMMITMENT IMPLEMENTATION SCHEDULE SOURCE 10 Bolting Integrity (continued)
- 5.
Revise engineering procedures to require volumetric examination in accordance with ASME Code Section XI, Table IWB 2500-1, Examination Category B-G-1, regardless of the code classification of the bolting, should high strength bolting greater than 2 inches in diameter be installed during the subsequent period of extended operation.
CEG Letter DNPS SLRA Supplement No. 1, dated February 20, 2025
February 20, 2025 Enclosure B Page 3 of 4 SLRA Table A.5, Subsequent License Renewal Commitment List, Item 26, Monitoring of Neutron-Absorbing Materials Other than Boraflex, on page A-80 is revised as shown below:
Table A.5 SUBSEQUENT LICENSE RENEWAL COMMITMENT LIST NO.
PROGRAM OR TOPIC COMMITMENT IMPLEMENTATION SCHEDULE SOURCE 26 Monitoring of Neutron-Absorbing Materials Other than Boraflex Existing program is credited.
Monitoring of Neutron-Absorbing Materials Other than Boraflex is an existing program that will be enhanced to:
- 1. Perform in-situ attenuation testing per NEI 16-03-A Rev 1 guidance at a frequency not to exceed 10 years on the Unit 2 spent fuel pool rack (Boral material) during the subsequent period of extended operation to identify whether loss of B10 is occurring. The first in-situ attenuation test of Boral material will be performed within three years of entering the subsequent period of extended operation. In-situ test results found outside the established criteria will be entered into the corrective action program for engineering evaluation.
Ongoing Program will be enhanced no later than six months prior to the subsequent period of extended operation.
Section A.2.1.26 CEG Letter DNPS SLRA Supplement No. 1, dated February 20, 2025
February 20, 2025 Enclosure B Page 4 of 4 SLRA Table A.5, Subsequent License Renewal Commitment List, Page A-95 is revised as shown below:
TABLE A.5 - SUBSEQUENT LICENSE RENEWAL COMMITMENT LIST NO. PROGRAM OR TOPIC COMMITMENT IMPLEMENTATION SCHEDULE SOURCE 43 Fatigue Monitoring Fatigue Monitoring is an existing program that will be enhanced to:
- 1.
The SI:FatigueProTM software will be updated to monitor for environmentally assisted fatigue at additional plant-specific component locations that may be more limiting than the sample set identified in NUREG/CR-6260. The CUFen values for the additional plant-specific component locations monitored for environmentally assisted fatigue will be calculated in accordance with the methodology in NUREG/CR-6909, Revision 1.
- 2.
Procedural direction will be provided to require periodic validation of chemistry parameters used to determine Fen factors used in SI:FatigueProTM.
- 3.
Applicable fatigue analyses and monitored component locations will be updated based on operating experience, plant modifications, inspection findings, changes to transient definitions, and unanticipated newly discovered fatigue loading events.
- 4. The SI:FatigueProTM software will be updated to include all six components of the stress tensor as input into stress-based fatigue transfer functions.
Program will be enhanced no later than six months prior to the subsequent period of extended operation.
Section A.3.1.1 CEG Letter DNPS SLRA Supplement No. 1, dated February 20, 2025