IR 05000275/2025006
| ML26064A038 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  (DPR-080, DPR-082) |
| Issue date: | 03/11/2026 |
| From: | Ami Agrawal NRC/RGN-IV/DORS/PBB |
| To: | Gerfen P Pacific Gas & Electric Co |
| Bloodgood M | |
| Shared Package | |
| IR 2025006 | List:
|
| References | |
| IR 2025006 | |
| Download: ML26064A038 (0) | |
Text
March 11, 2026
SUBJECT:
ANNUAL ASSESSMENT LETTER FOR DIABLO CANYON POWER PLANT, UNITS 1 AND 2 (REPORT 05000275/2025006 AND 05000323/2025006)
Dear Paula A. Gerfen:
The U.S. Nuclear Regulatory Commission (NRC) has completed its end-of-cycle performance assessment of Diablo Canyon Power Plant, Units 1 and 2, reviewing performance indicators (PIs), inspection results, and enforcement actions from January 1, 2025, through December 31, 2025. This letter informs you of the NRCs assessment of your facility during this period and its plans for future inspections at your facility. The NRC concluded that overall performance at your facility preserved public health and safety. The baseline inspection program was completed at your facility as defined in Inspection Manual Chapter 2515, Light-Water Reactor Inspection Program - Operations Phase.
The NRC determined the performance at Diablo Canyon Power Plant, Units 1 and 2, during the most recent quarter was within the Licensee Response Column, the highest performance category of the NRCs Reactor Oversight Process (ROP) Action Matrix, because all inspection findings had very low safety significance (i.e., Green), and all PIs were within the expected range (i.e., Green). Therefore, the NRC plans to conduct ROP baseline inspections at your facility.
The enclosed inspection plan lists the inspections scheduled through December 31, 2027.
The NRC provides the inspection plan to allow for the resolution of any scheduling conflicts and personnel availability issues. Routine inspections performed by resident inspectors are not included in the inspection plan. The inspections listed during the last twelve months of the inspection plan are tentative and may be revised. The NRC will contact you as soon as possible to discuss changes to the inspection plan should circumstances warrant any changes. This letter and its enclosure will be made available for public inspection and copying at ADAMS Public Documents l NRC.gov and at the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.
Please contact me at 817-200-1411 with any questions you have regarding this letter.
Sincerely, Ami N. Agrawal, Chief Reactor Projects Branch B Division of Operating Reactor Safety Docket Nos. 05000275 and 05000323 License Nos. DPR-80 and DPR-82 Enclosure:
Inspection Plan cc w/ encl: via GovDelivery Subscriber Signed by Agrawal, Ami on 03/11/26
ML26064A038 SUNSI Review By: MRB Publicly Available and Non-Sensitive Non-Publicly Available and Sensitive OFFICE SPE:DORS:PBB BC:DORS:PBB NAME MBloodgood AAgrawal SIGNATURE
/RA/
/RA/
DATE 03/09/26 03/11/26
Site Inspection Activity Plan Diablo Canyon 01/01/2026 - 12/31/2027 Unit Start End Activity CAC Title Staff Count RP 5,8 - DC
1,2 3/2/2026 3/6/2026 IP 71124.05 000729 Radiation Monitoring Instrumentation 1,2 3/2/2026 3/6/2026 IP 71124.08 000732 Radioactive Solid Waste Processing & Radioactive Material Handling, Storage, & Transportation Comprehensive Engineering Team Inspection - Diablo Canyon
1,2 7/13/2026 7/17/2026 IP 71111.21M 000713 Comprehensive Engineering Team Inspection 1,2 7/27/2026 7/31/2026 IP 71111.21M 000713 Comprehensive Engineering Team Inspection EP Exercise & PI Inspection (2026) - DC
1,2 8/31/2026 9/4/2026 IP 71114.01 000716 Exercise Evaluation 1,2 8/31/2026 9/4/2026 IP 71114.04 000719 Emergency Action Level and Emergency Plan Changes 1,2 8/31/2026 9/4/2026 IP 71151 001397 Performance Indicator Verification Inservice Inspection - DC (U1)
1 10/19/2026 10/30/2026 IP 71111.08P 000702 Inservice Inspection Activities (PWR)
1,2 10/19/2026 10/23/2026 IP 71124.01 000725 Radiological Hazard Assessment and Exposure Controls 1,2 10/19/2026 10/23/2026 IP 71124.03 000727 In-Plant Airborne Radioactivity Control and Mitigation 1,2 10/19/2026 10/23/2026 IP 71151 000746 Performance Indicator Verification Security 71130.02/.04/.05
1,2 12/7/2026 12/10/2026 IP 71130.02 000734 Access Control 1,2 12/7/2026 12/10/2026 IP 71130.04 000736 Equipment Performance, Testing, and Maintenance 1,2 12/7/2026 12/10/2026 IP 71130.05 000737 Protective Strategy Evaluation 1,2 12/7/2026 12/10/2026 IP 71130.09 001656 Security Plan Changes 1,2 12/7/2026 12/10/2026 IP 71130.14 000743 Review of Power Reactor Target Sets DC 2027 BRQ
1,2 2/28/2027 3/6/2027 IP 71111.11B 000704 Licensed Operator Requalification Program and Licensed Operator Performance DC 2027 INITIAL EXAM
1,2 2/21/2027 2/27/2027 OV 000956 FB-OR-Onsite Validation Of Initial License Examination (OV)
1,2 4/11/2027 4/17/2027 EXAD 000500 FB-OR-Initial License Exam Administration (EXAD)
Inservice Inspection-DC (U2)
2 4/26/2027 5/8/2027 IP 71111.08P 000702 Inservice Inspection Activities (PWR)
1,2 4/26/2027 4/30/2027 IP 71124.01 000725 Radiological Hazard Assessment and Exposure Controls 1,2 4/26/2027 4/30/2027 IP 71124.04 000728 Occupational Dose Assessment Prepared on 3/2/2026 3:49:10 PM 1 of 3
Site Inspection Activity Plan 1,2 4/26/2027 4/30/2027 IP 71151 000746 Performance Indicator Verification Focused Engineering Inspection 1 - DC
1,2 6/7/2027 6/11/2027 IP 71111.21N 000714 Focused Engineering Inspections (FEI Placeholder)
1,2 6/21/2027 6/25/2027 IP 71111.21N 000714 Focused Engineering Inspections (FEI Placeholder)
1,2 7/12/2027 7/16/2027 IP 71124.06 000730 Radioactive Gaseous and Liquid Effluent Treatment 1,2 7/12/2027 7/16/2027 IP 71124.07 000731 Radiological Environmental Monitoring Program Cybersecurity-DC
1,2 7/19/2027 7/24/2027 IP 71130.10 000741 Cybersecurity EP Program & PI Inspection (2027) - DC
1,2 8/16/2027 8/20/2027 IP 71114.02 000717 Alert and Notification System Testing 1,2 8/16/2027 8/20/2027 IP 71114.03 000718 Emergency Response Organization Staffing and Augmentation System 1,2 8/16/2027 8/20/2027 IP 71114.04 000719 Emergency Action Level and Emergency Plan Changes 1,2 8/16/2027 8/20/2027 IP 71114.05 000720 Maintenance of Emergency Preparedness 1,2 8/16/2027 8/20/2027 IP 71151 001397 Performance Indicator Verification Security 71130.02/.07/.08
1,2 8/23/2027 8/27/2027 IP 71130.02 000734 Access Control 1,2 8/23/2027 8/27/2027 IP 71130.07 000739 Security Training 1,2 8/23/2027 8/27/2027 IP 71130.08 000740 Fitness-For-Duty Program 1,2 8/23/2027 8/27/2027 IP 71130.09 001656 Security Plan Changes 1,2 8/23/2027 8/27/2027 IP 71151 001338 Performance Indicator Verification Prepared on 3/2/2026 3:49:10 PM 2 of 3
Site Inspection Activity Plan Diablo Canyon 01/01/2026 - 12/31/2027 Unit Start End Activity CAC Title Staff Count Diablo Canyon ISFSI Aging Management Inspection during canister baseline (one-week, TBD)
6/1/2026 8/31/2026 IP 60859 001921 Independent Spent Fuel Storage Installation (ISFSI) License Renewal Inspection Security 81311
8/23/2027 8/27/2027 IP 81311 001006 Physical Security Requirements for Independent Spent Fuel Storage Installations Diablo Canyon ISFSI Loading and Triennial Inspection (one week during month, date TBD)
9/1/2027 9/30/2027 IP 60855 001001 Operation of an Independent Spent Fuel Storage Installation Prepared on 3/2/2026 3:49:10 PM 3 of 3