RS-25-055, Supplement No. 4 - Changes to the Clinton Power Station, Unit 1, License Renewal Application
| ML25084A044 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 03/25/2025 |
| From: | Wilson C Constellation Energy Generation |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| RS-25-055 | |
| Download: ML25084A044 (1) | |
Text
200 Energy Way Kennett Square, PA 19348 www.ConstellationEnergy.com RS-25-055 10 CFR 50 10 CFR 51 10 CFR 54 March 25, 2025 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461
Subject:
Supplement No. 4 - Changes to the Clinton Power Station, Unit 1, License Renewal Application
References:
- 1. Letter from Christopher D. Wilson (Constellation Energy Generation, LLC) to U.S. NRC, Application for Renewed Operating License, dated February 14, 2024 (ML24045A023)
- 2. Letter from Christopher D. Wilson (Constellation Energy Generation, LLC) to U.S. NRC, Supplement No. 1 - Changes to the Clinton Power Station, Unit 1, License Renewal Application, dated November 27, 2024 (ML24332A050)
- 3. Letter from Christopher D. Wilson (Constellation Energy Generation, LLC) to U.S. NRC, Supplement No. 2 - Changes to the Clinton Power Station, Unit 1, License Renewal Application, dated December 20, 2024 (ML24355A050)
- 4. Letter from Christopher D. Wilson (Constellation Energy Generation, LLC) to U.S. NRC, Supplement No. 3 - Changes to the Clinton Power Station, Unit 1, License Renewal Application, dated January 30, 2025 (ML25030A182)
In Reference 1, Constellation Energy Generation, LLC (CEG) submitted a License Renewal Application (LRA) for Clinton Power Station, Unit 1 (CPS). In References 2, 3, and 4, CEG submitted Supplement Nos. 1, 2, and 3, respectively to the LRA for CPS. The purpose of this letter is to provide Supplement No. 4 to the LRA for CPS. Supplement No. 4 includes one change to the LRA which addresses a change in material identified by CEG to reflect the current configuration.
March 25, 2025 U.S. Nuclear Regulatory Commission Page 2 Enclosure A to this letter provides a description of the change, and corresponding mark-ups to affected portions of the LRA, thereby supplementing the CPS LRA.
There are no new regulatory commitments contained in this letter.
This submittal has been discussed with the NRC License Renewal Project Manager for the CPS License Renewal project.
Should you have any questions regarding this submittal, please contact Ms. Lydia S.
Dworakowski, Licensing Lead, CPS License Renewal Project, by email at Lydia.Dworakowski@constellation.com.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 25th day of March 2025.
Respectfully, Christopher D. Wilson License Renewal Director Constellation Energy Generation, LLC
Enclosure:
A. Changes to the Clinton Power Station, Unit 1, License Renewal Application cc:
NRC Regional Administrator, Region III NRC Senior Resident Inspector - Clinton Power Station NRC Project Manager (Safety Review), NRR-DNRL NRC Project Manager (Environmental Review), NRR-DNRL NRC Project Manager, NRR-DORL - Clinton Power Station Illinois Emergency Management Agency - Division of Nuclear Safety Wilson, Christopher D Digitally signed by Wilson, Christopher D Date: 2025.03.25 07:44:52 -04'00'
March 25, 2025 Enclosure A Page 1 of 6 Enclosure A Changes to the Clinton Power Station, Unit 1, License Renewal Application Introduction This enclosure contains one change that is being made to the License Renewal Application (LRA) that was identified after submittal of the LRA. The change is described and the affected page number(s) and portion(s) of the LRA are provided. For clarity, entire sentences or paragraphs from the LRA are provided. Previously submitted information is shown in normal font. Additions due to this submittal are highlighted with bolded italics for inserted text, and strikethroughs for deleted text. Revisions to LRA tables are shown by providing excerpts from the affected tables.
March 25, 2025 Enclosure A Page 2 of 6 Change #1 - Revision to Primary Containment Ventilation System Material Affected LRA Sections: Section 3.3.2.1.14 and Table 3.3.2-14 LRA Page Numbers: 3.3-20, 3.3-21, 3.3-201, and 3.3-209 Description of Change:
The material for a Primary Containment Ventilation System cooling coil housing is being corrected to reflect the current configuration since it was determined that the cooling coil housing is not internally coated.
Accordingly, LRA Section 3.2.2.1.14 and Table 3.3.2-14 are revised to identify the correct material and the appropriate aging management program to manage the aging effect.
March 25, 2025 Enclosure A Page 3 of 6 LRA Section 3.3.2.1.14, Primary Containment Ventilation System, page 3.3-20 is revised as shown below:
3.3.2.1.14 Primary Containment Ventilation System Materials The materials of construction for the Primary Containment Ventilation System components are:
Carbon and Low Alloy Steel Bolting Carbon Steel Carbon Steel (with internal coatings)
Copper Alloy with 15% Zinc or less Galvanized Bolting Glass Gray Cast Iron Stainless Steel
March 25, 2025 Enclosure A Page 4 of 6 LRA Section 3.3.2.1.14, Primary Containment Ventilation System, page 3.3-21 is revised as shown below:
Aging Management Programs The following aging management programs manage the aging effects for the Primary Containment Ventilation System components:
Bolting Integrity (B.2.1.11)
Closed Treated Water Systems (B.2.1.13)
External Surfaces Monitoring of Mechanical Components (B.2.1.24)
Inspection of Internal Surfaces in Miscellaneous Piping and Ducting Components (B.2.1.25)
Internal Coatings/Linings for In-Scope Piping, Piping Components, Heat Exchangers, and Tanks AMP (B.2.1.42)
Lubricating Oil Analysis (B.2.1.26)
One-Time Inspection (B.2.1.21)
Open-Cycle Cooling Water System (B.2.1.12)
Selective Leaching (B.2.1.22)
March 25, 2025 Enclosure A Page 5 of 6 LRA Table 3.3.2-14, Primary Containment Ventilation System, Summary of Aging Management Evaluation, page 3.3-201 is revised as shown below:
Table 3.3.2-14 Primary Containment Ventilation System Summary of Aging Management Evaluation Table 3.3.2-14 Primary Containment Ventilation System Component Type Intended Function Material Environment Aging Effect Requiring Management Aging Management Programs NUREG-1801 Item NUREG-1800 Table 1 Item Notes Ducting and Components Structural Integrity (Attached)
Carbon Steel (with internal coatings)
Condensation (External)
Loss of Material External Surfaces Monitoring of Mechanical Components (B.2.1.24)
VII.I.A-81 3.3.1-78 A
Condensation (Internal)
Loss of Material Inspection of Internal Surfaces in Miscellaneous Piping and Ducting Components (B.2.1.25)
VII.F3.A-08 3.3.1-90 A
Loss of Coating or Lining Integrity Internal Coatings/Linings for In-Scope Piping, Piping Components, Heat Exchangers, and Tanks AMP (B.2.1.42)
G, 1 Loss of Material Internal Coatings/Linings for In-Scope Piping, Piping Components, Heat Exchangers, and Tanks AMP (B.2.1.42)
G, 1
March 25, 2025 Enclosure A Page 6 of 6 LRA Table 3.3.2-14, Primary Containment Ventilation System, Summary of Aging Management Evaluation, Plant Specific Note on page 3.3-209 is revised as shown below:
Table 3.3.2-14 Primary Containment Ventilation System (Continued)
Notes Definition of Note A
Consistent with NUREG-1801 item for component, material, environment, and aging effect. AMP is consistent with NUREG-1801 AMP.
B Consistent with NUREG-1801 item for component, material, environment, and aging effect. AMP takes some exceptions to NUREG-1801 AMP.
C Component is different, but consistent with NUREG-1801 item for material, environment, and aging effect. AMP is consistent with NUREG-1801 AMP.
D Component is different, but consistent with NUREG-1801 item for material, environment, and aging effect. AMP takes some exceptions to NUREG-1801 AMP.
E Consistent with NUREG-1801 item for material, environment and aging effect, but a different aging management program is credited or NUREG-1801 identifies a plant-specific aging management program.
F Material not in NUREG-1801 for this component.
G Environment not in NUREG-1801 for this component and material.
H Aging effect not in NUREG-1801 for this component, material and environment combination.
I Aging effect in NUREG-1801 for this component, material and environment combination is not applicable.
J Neither the component nor the material and environment combination is evaluated in NUREG-1801.
Plant Specific Notes:
- 1. Not Used. Internal Coatings/Linings for In-Scope Piping, Piping Components, Heat Exchangers, and Tanks AMP (B.2.1.44) is used to manage the aging effect(s) applicable to this component type, material, and environment combination.
- 2. Components located inside HVAC housings, ducting or piping components, the Inspection of Internal Surfaces in Miscellaneous Piping and Ducting Components (B.2.1.26) program is used to manage the aging effect(s) applicable to this component type, material, and environment combination.