IR 05000318/2024007

Assessment Follow-Up Letter for Calvert Cliffs Nuclear Power Plant, Unit 2 (Report 05000318/2024007)

ML24309A247
Person / Time
Site:	Calvert Cliffs
Issue date:	11/06/2024
From:	Blake Welling NRC/RGN-I/DORS
To:	Rhoades D Constellation Energy Generation, Constellation Nuclear
References
IR 2024007
Download: ML24309A247 (1)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION

REGION I

475 ALLENDALE ROAD, SUITE 102 KING OF PRUSSIA, PA 19406 1415

November 6, 2024

David Senior Vice President Constellation Energy Generation, LLC President and Chief Nuclear Officer (CNO)

Constellation Nuclear 4300 Winfield Road Warrenville, IL 60555

SUBJECT: ASSESSMENT FOLLOW-UP LETTER FOR CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT 2 (REPORT 05000318 /2024007)

Dear David Rhoades:

As a result of its quarterly review of plant performance, which was completed on October 31, 2024, the U.S. Nuclear Regulatory Commission (NRC) updated its assessment of Calvert Cliffs Nuclear Power Plant, Unit 2. The NRCs evaluation consisted of a review of performance indicators and inspection results. This letter informs you of the NRCs assessment of your facility and supplements, but does not supersede, the annual assessment letter dated February 28, 2024.

The NRCs review of Calvert Cliffs Nuclear Power Plant, Unit 2, identified that the Unplanned Scrams per 7000 Critical Hours Performance Indicator has crossed the Green to White threshold due to four unplanned scrams for the last four quarters. As a result of this performance indicator, the NRC determined the performance at Calvert Cliffs Nuclear Power Plant, Unit 2, to be in the Regulatory Response Column (Column 2) of the NRCs Reactor Oversight Process (ROP) Action Matrix in Inspection Manual Chapter 0305, Operating Assessment Program, as of July 1, 2024.

Therefore, in addition to ROP baseline inspections, the NRC plans to conduct a supplemental inspection in accordance with Inspection Procedure 95001, Supplemental Inspection Response to Action Matrix Column 2 (Regulatory Response) Inputs, following Constellations notification of readiness for this inspection. This inspection procedure is conducted to provide assurance that the root and contributing causes of risk significant performance issues are understood, the extent of condition and the extent of cause are identified, and the corrective actions are prompt and effective to prevent recurrence.

In accordance with Title 10 of the Code of Federal Regulations 2.390 of the NRCs Rules of Practice, a copy of this letter will be available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRC's document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Please contact Brice Bickett, Chief, Projects Branch 3, at (610) 337-5312 with any questions you have regarding this letter.

Sincerely, Blake Welling, Director Division of Operating Reactor Safety

Docket Nos. 05000318 License Nos. DPR-69

Enclosure:

As stated

cc w/encl: Distribution via ListServ SUBJECT: ASSESSMENT FOLLOW-UP LETTER FOR CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT 2 (REPORT 05000318/2024007) DATED NOVEMBER 6, 2024

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RLorson, RA (R1ORAMAIL RESOURCE)

DCollins, DRA (R1ORAMAIL RESOURCE)

BWelling, DORS (R1DORSMAIL RESOURCE)

RMcKinley DORS (R1DORSMAIL RESOURCE)

PKrohn, DRSS (R1DRSSMAIL RESOURCE)

JZimmerman, DRSS (R1DRSSMAIL RESOURCE)

BBickett, DORS RClagg, DORS SQuiroga, DORS EDiPaolo, DORS, SRI ATran, DORS, RI CFragman, DORS, AA RRuiz, RI OEDO RidsNrrPMCalvertCliffs Resource RidsNrrDorlLpl1 Resource DORS Specialist Branch Chiefs DRSS Reactor Branch Chiefs DTifft, RI, SLO DScrenci, RI, PAO NSheehan, RI, PAO ROPassessment Resource

DOCUMENT NAME: https://usnrc.sharepoint.com/teams/ROPAssessmentMeetings/Shared Documents/ROP -25 Second Quarter Process/Branch 3/3QAL_CC2_ROP25 - IE01 WHITE.docx ADAMS Accession No. ML24309A247 SUNSI Review n -Sensitive Publvlle

Sensitive n -Publiclyvlable

OFFICE RI/DORS RI/DORS /

ME RClagg BBickett BWli TE 10/ /2024 10/ /2024 11/4/2024 OFFIAL RERD CO