ML26016A628
| ML26016A628 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs, Dresden, Peach Bottom, Nine Mile Point, Byron, Braidwood, Limerick, Ginna, Clinton, Quad Cities, FitzPatrick, LaSalle  |
| Issue date: | 01/30/2026 |
| From: | Ilka Berrios Plant Licensing Branch III |
| To: | Mudrick C Constellation Energy Generation |
| Wall, SP | |
| References | |
| EPID L-2025-LLR-0088 | |
| Download: ML26016A628 (0) | |
Text
January 30, 2026 Mr. Christopher H. Mudrick Sr.
Senior Vice President and Chief Nuclear Officer Constellation Energy Generation, LLC President Constellation Nuclear 200 Energy Way Kennett Square, PA 19348
SUBJECT:
BRAIDWOOD STATION, UNITS 1 AND 2; BYRON STATION, UNIT NOS. 1 AND 2; CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2; CLINTON POWER STATION, UNIT NO. 1; DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3; JAMES A. FITZPATRICK NUCLEAR POWER PLANT; LASALLE COUNTY STATION, UNITS 1 AND 2; LIMERICK GENERATING STATION, UNITS 1 AND 2; NINE MILE POINT NUCLEAR STATION, UNITS 1 AND 2; PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3; QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2; AND R. E. GINNA NUCLEAR POWER PLANT - REQUEST TO USE A PROVISION OF A LATER EDITION OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE, SECTION XI (EPID L-2025-LLR-0088)
Dear Mr. Mudrick:
By letter dated November 4, 2025 (Agencywide Documents Access and Management System Accession No. ML25308A009), Constellation Energy Generation, LLC (CEG, the licensee) submitted a request to use a provision of a later edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code,Section XI, at Braidwood Station (Braidwood), Units 1 and 2; Byron Station (Byron), Unit Nos. 1 and 2; Calvert Cliffs Nuclear Power Plant (Calvert Cliffs), Units 1 and 2; Clinton Power Station (Clinton), Unit No. 1; Dresden Nuclear Power Station (Dresden), Units 2 and 3; James A. FitzPatrick Nuclear Power Plant (FitzPatrick); LaSalle County Station (LaSalle), Units 1 and 2; Limerick Generating Station (Limerick), Units 1 and 2; Nine Mile Point Nuclear Station (NMP), Units 1 and 2; Peach Bottom Atomic Power Station (Peach Bottom), Units 2 and 3; Quad Cities Nuclear Power Station (Quad Cities), Units 1 and 2; and R. E. Ginna Nuclear Power Plant (Ginna). Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(g)(4)(iv), CEG proposed to use the quality assurance requirements in paragraph IWA-4142.1, Alternative Quality Assurance Program Requirements for Owners, of the 2021 Edition of the ASME BPV Code,Section XI, at each of these facilities.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the subject request and concludes, as set forth in the enclosed safety evaluation, that CEG has adequately addressed the requirements in 10 CFR 50.55a(g)(4)(iv). Therefore, the NRC staff approves the use of paragraph IWA-4142.1 of the 2021 Edition of the ASME BPV Code,Section XI, for Braidwood, Units 1 and 2, Byron, Unit Nos. 1 and 2, Calvert Cliffs, Units 1 and 2, Clinton, Unit No. 1,
C. Mudrick Dresden, Units 2 and 3, FitzPatrick, LaSalle, Units 1 and 2, Limerick, Units 1 and 2, NMP, Units 1 and 2, Peach Bottom, Units 2 and 3, Quad Cities, Units 1 and 2, and Ginna. For each facility, this approval is for the remainder of the current inservice inspection interval.
All other ASME BPV Code, section XI, requirements for which relief was not specifically requested and approved remain applicable, including third-party review by the Authorized Nuclear Inservice Inspector.
If you have any questions, please contact the Senior Project Manager, Scott Wall, at 301-415-2855 or e-mail at Scott.Wall@nrc.gov.
Sincerely, Ilka T. Berrios, Acting Chief Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. STN 50-456, STN 50-457, STN 50-454, STN 50-455, 50-317, 50-318, 50-461, 50-237, 50-249, 50-333, 50-373, 50-374, 50-352, 50-353, 50-220, 50-410, 50-277, 50-278, 50-254, 50-265, and 50-244
Enclosure:
Safety Evaluation cc: Listserv ILKA BERRIOS Digitally signed by ILKA BERRIOS Date: 2026.01.30 11:46:32 -05'00'
Enclosure SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUEST TO USE A PROVISION OF A LATER EDITION OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE CONSTELLATION ENERGY GENERATION, LLC BRAIDWOOD STATION, UNITS 1 AND 2 BYRON STATION, UNIT NOS. 1 AND 2 CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2 CLINTON POWER STATION, UNIT NO. 1 DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 JAMES A. FITZPATRICK NUCLEAR POWER PLANT LASALLE COUNTY STATION, UNITS 1 AND 2 LIMERICK GENERATING STATION, UNITS 1 AND 2 NINE MILE POINT NUCLEAR STATION, UNITS 1 AND 2 PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 R. E. GINNA NUCLEAR POWER PLANT DOCKET NOS. STN 50-456, STN 50-457, STN 50-454, STN 50-455, 50-317, 50-318, 50-461, 50-237, 50-249, 50-333, 50-373, 50-374, 50-352, 50-353, 50-220, 50-410, 50-277, 50-278, 50-254, 50-265, AND 50-244
1.0 INTRODUCTION
By letter dated November 4, 2025 (Agencywide Documents Access and Management System Accession No. ML25308A009), Constellation Energy Generation, LLC (CEG, the licensee) submitted a request to use a provision of a later edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (BPV) Code,Section XI, at Braidwood Station (Braidwood), Units 1 and 2; Byron Station (Byron), Unit Nos. 1 and 2; Calvert Cliffs Nuclear Power Plant (Calvert Cliffs), Units 1 and 2; Clinton Power Station (Clinton), Unit No. 1; Dresden Nuclear Power Station (Dresden), Units 2 and 3; James A. FitzPatrick Nuclear Power Plant (FitzPatrick); LaSalle County Station (LaSalle), Units 1 and 2; Limerick Generating Station (Limerick), Units 1 and 2; Nine Mile Point Nuclear Station (NMP), Units 1 and 2; Peach Bottom Atomic Power Station (Peach Bottom), Units 2 and 3; Quad Cities Nuclear Power Station (Quad Cities), Units 1 and 2; and R. E. Ginna Nuclear Power Plant (Ginna). Specifically, pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(g)(4)(iv), CEG proposed to use the quality assurance program requirements in paragraph IWA-4142.1, Alternative Quality Assurance Program Requirements for Owners, of the 2021 Edition of the ASME BPV Code,Section XI, at each of these facilities.
2.0 REGULATORY EVALUATION
Specific editions and addenda, or portions thereof, of the ASME BPV Code,Section XI, have been incorporated by reference into 10 CFR 50.55a(a)(1)(ii). The editions and addenda of the ASME BPV Code,Section XI, are subject to the limitations in 10 CFR 50.55a(b)(2).
The regulations in 10 CFR 50.55a(g)(4) state, in part, that ASME Code Class 1, 2, and 3 components (including supports) must meet the requirements, except the design and access provisions and the preservice examination requirements, set forth in section XI of the applicable editions and addenda of the ASME Code to the extent practical within the limitations of design, geometry, and materials of construction of the components. Paragraph 50.55a(g)(4)(iv) of 10 CFR states:
lnservice examination of components and system pressure tests may meet the requirements set forth in subsequent editions and addenda that are incorporated by reference in paragraph (a) of this section [10 CFR 50.55a], subject to the conditions listed in paragraph (b) of this section, and subject to Commission [U.S.
Nuclear Regulatory Commission (NRC or Commission)] approval. Portions of editions or addenda may be used, provided that all related requirements of the respective editions or addenda are met.
Regulations in 10 CFR 50.55a(1)(ii)(C)(57) incorporate by reference the 2021 Edition of the ASME BPV Code,Section XI.
Regulatory Issue Summary 2004-12, Clarification on Use of Later Editions and Addenda to the ASME OM Code and Section Xl (ML042090436), reinforces that licensees must request approval to use later Code editions and addenda via a letter to the NRC. Licensees may not simply update their inservice testing (IST) or inservice inspection (ISI) programs Code of Record without requesting approval from the Commission.
3.0 TECHNICAL EVALUATION
3.1 Licensees Request 3.1.1 Components for Which the Subsequent Code Edition is Requested All Class 1, 2, and 3, piping systems.
3.1.2 Current Code Edition and Addenda of Record The application identified the currently applicable editions and addenda of the ASME BPV Code,Section XI, for each plant, as shown in Table 1 below. In addition, Table 1 shows the associated ISI interval, including the start and end dates, for each plant.
Table 1: Current ASME BPV Code,Section XI, Code of Record PLANT ISI INTERVAL ASME BPV CODE, SECTION XI START END Braidwood, Unit 1 4th 2013 Edition 8/29/2018 7/28/2028 Braidwood, Unit 2 4th 2013 Edition 11/5/2018 10/16/2028 Byron Unit Nos. 1 and 2 4th 2019 Edition 7/16/2025 7/15/2037 Calvert Cliffs, Units 1 and 2 5th 2013 Edition 7/1/2019 6/30/2029 Clinton, Unit No. 1 4th 2013 Edition 7/1/2020 6/30/2030 Dresden, Units 2 and 3 6th 2017 Edition 1/20/2023 1/19/2035 FitzPatrick 5th 2007 Edition, through 2008 Addenda 8/1/2017 6/15/2027 LaSalle, Units 1 and 2 4th 2007 Edition, through 2008 Addenda 10/1/2017 9/30/2027 Limerick, Units 1 and 2 4th 2007 Edition, through 2008 Addenda 2/1/2017 1/31/2027 NMP, Unit 1 5th 2013 Edition 8/23/2019 8/22/2029 NMP, Unit 2 4th 2013 Edition 10/06/2018 8/22/2028 Peach Bottom, Units 2 and 3 5th 2013 Edition 1/1/2019 12/31/2028 Quad Cities, Units 1 and 2 6th 2017 Edition 4/2/2023 4/1/2035 Ginna 6th 2013 Edition 1/1/2020 12/31/2029 3.1.3 Proposed Subsequent Code Edition Pursuant to 10 CFR 50.55a(g)(4)(iv), CEG proposed to use the alternative requirements in paragraph IWA-4142.1, Alternative Quality Assurance Program Requirements for Owners, of the 2021 Edition of the ASME BPV Code, section XI, at each of the facilities named in Table 1.
These requirements would apply in place of the provisions of the ASME Code editions identified in Table 1.
3.1.4 Duration of the Use of the Later Code Edition The duration of this request is for the remainder of the current ISI interval for each plant, as shown in Table 1 above.
3.2 Staff Evaluation Based on the requirements in 10 CFR 50.55a(g)(4)(iv), the NRC staff considered the following criteria in its review of CEGs application:
- 1. The proposed edition or addenda of the ASME BPV Code are incorporated by reference in 10 CFR 50.55a(a).
- 2. The proposed edition or addenda of the ASME BPV Code are subject to the conditions listed in 10 CFR 50.55a(b).
- 3. The licensee requested NRC approval to use the subsequent edition or addenda of the ASME BPV Code.
- 4. If only portions of editions or addenda are to be used, all related requirements of the respective editions or addenda are met.
3.2.1 Incorporation by Reference CEG requested to use specific provisions in the 2021 Edition of the ASME BPV Code,Section XI, which has been incorporated by reference in 10 CFR 50.55a(a). Therefore, the NRC finds that the first criterion has been satisfied.
3.2.2 Subject to Conditions Listed in 10 CFR 50.55a(b)
Regulations in 10 CFR 50.55a(b) contain no conditions relevant to paragraph IWA-4142.1.
Therefore, the NRC staff finds that the second criterion has been satisfied.
3.2.3 Requesting Commission Approval The NRC staff determined that CEGs request dated November 4, 2025, constitutes a request to the Commission for approval to use a subsequent edition or addendum of the ASME BPV Code,Section XI. Therefore, the third criterion above has been satisfied.
3.2.4 All Related Requirements The NRC staff finds that there are no related requirements relevant to this request. Therefore, the NRC staff finds that the fourth criterion has been satisfied.
3.2.5 Summary The NRC staff finds that the licensee has adequately addressed all regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv) since the four criteria above have been satisfied.
4.0 CONCLUSION
As set forth above, the NRC staff finds that the licensee has adequately addressed all of the regulatory requirements set forth in 10 CFR 50.55a(g)(4)(iv). Therefore, the NRC staff concludes that the use of paragraph IWA-4142.1 of the 2021 Edition of the ASME BPV Code,Section XI, is acceptable. The NRC staff approves the use of paragraph IWA-4142.1 of the 2021 Edition of the ASME BPV Code,Section XI, at Braidwood, Units 1 and 2, Byron, Unit Nos. 1 and 2, Calvert Cliffs, Units 1 and 2, Clinton, Unit No. 1, Dresden Units, 2 and 3, FitzPatrick, LaSalle, Units 1 and 2, Limerick, Units 1 and 2, NMP, Units 1 and 2, Peach Bottom, Units 2 and 3, Quad Cities, Units 1 and 2, and Ginna. For each facility, this approval is for the remainder of the current ISI interval, as listed in Table 1 above.
All other requirements of the ASME BPV Code,Section XI, as incorporated by reference in 10 CFR 50.55a, for which relief was not specifically requested and approved remain applicable, including third-party review by the Authorized Nuclear Inservice Inspector.
Principal Contributors: Isaac Anchondo-Lopez, NRR Scott Wall, NRR Date: January 30, 2026
SUBJECT:
BRAIDWOOD STATION, UNITS 1 AND 2; BYRON STATION, UNIT NOS. 1 AND 2; CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2; CLINTON POWER STATION, UNIT NO. 1; DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3; JAMES A. FITZPATRICK NUCLEAR POWER PLANT; LASALLE COUNTY STATION, UNITS 1 AND 2; LIMERICK GENERATING STATION, UNITS 1 AND 2; NINE MILE POINT NUCLEAR STATION, UNITS 1 AND 2; PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3; QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2; AND R. E. GINNA NUCLEAR POWER PLANT - REQUEST TO USE A PROVISION OF A LATER EDITION OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS BOILER AND PRESSURE VESSEL CODE, SECTION XI (EPID L-2025-LLR-0088) DATED JANUARY 30, 2026 DISTRIBUTION:
PUBLIC RidsNrrDorlLpl1 Resource RidsNrrDorlLpl3 Resource RidsRgn1MailCenter Resource RidsRgn3MailCenter Resource RidsNrrLASLent Resource RidsNrrLAKEntz Resource RidsAcrs_MailCTR Resource RidsNrrPMConstellation Resource RidsNrrPMBraidwood Resource RidsNrrPMByron Resource RidsNrrPMCalvertCliffs Resource RidsNrrPMClinton Resource RidsNrrPMDresden Resource RidsNrrPMFitzPatrick Resource RidsNrrPMLaSalle Resource RidsNrrPMLimerick Resource RidsNrrPMNineMilePoint Resource RidsNrrPMPeachBottom Resource RidsNrrPMQuadCities Resource RidsNrrPMREGinna Resource RidsNrrDnrlNphp Resource IAnchondo-Lopez, NRR Accession No.: ML26016A628 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DNRL/NPHP/BC NAME SWall SLent MMitchell DATE 01/16/2026 01/23/26 12/17/2025 OFFICE NRR/DORL/LPL3/BC(A)
NRR/DORL/LPL3/PM NAME IBerrios SWall DATE 01/30/2026 01/30/2026 OFFICIAL RECORD COPY