IR 05000275/2023006

Annual Assessment Letter for Diablo Canyon Power Plant, Units 1 and 2 (Report 05000275/2023006 and 05000323/2023006)

ML24047A248
Person / Time
Site:	Diablo Canyon
Issue date:	02/28/2024
From:	Patricia Vossmar NRC/RGN-IV/DORS/PBA
To:	Gerfen P PG&E Co
References
IR 2023006
Download: ML24047A248 (7)

Text

February 28, 2024

SUBJECT:

ANNUAL ASSESSMENT LETTER FOR DIABLO CANYON POWER PLANT, UNITS 1 AND 2 (REPORT 05000275/2023006 AND 05000323/2023006)

Dear Paula 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, 2023, through December 31, 2023. 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, 2025. 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 12 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. For 2024, the Regional Administrator has authorized completing inspection procedure (IP) 71002, License Renewal, and IP 71013, Site Inspection for Plants with a Timely Renewal Application. The IP 71013 inspection will be conducted separately for each unit.

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 component of NRC's Agencywide Documents Access and Management System (ADAMS). The ADAMS link is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Please contact me at 817-200-1144 with any questions you have regarding this letter.

Sincerely, Patricia J. Vossmar, Chief Projects Branch A Division of Operating Reactor Safety Docket Nos. 05000275, 05000323 License Nos. DPR-80, DPR-82 Enclosure:

Inspection Plan cc w/ encl: Distribution via LISTSERV Signed by Vossmar, Patricia on 02/28/24

ML24047A248 SUNSI Review ADAMS: Non-Publicly Available Non-Sensitive Keyword:

By: RLB Yes No Publicly Available Sensitive NRC-002 OFFICE SPE:DORS/PBA BC:DORS/PBA NAME RBywater RLB PVossmar DATE 02/20/24 02/28/24

Site Inspection Activity Plan 07200026 - Diablo Canyon (ISFSI)

01/01/2024 - 12/31/2025

Unit Start End Activity CAC Title Staff Count

Diablo Canyon ISFSI Loading Inspection (one week during the campaign) 2

9/1/2024 9/30/2024 IP 60855 001001 Operation Of An ISFSI

ISFSI Security Inspection (IP 81311) 1

10/7/2024 10/11/2024 IP 81311 001006 Physical Security Requirements for Independent Spent Fuel Storage Installations

Prepared on 2/20/2024 10:30:14 AM 1 of 4 Site Inspection Activity Plan Diablo Canyon

01/01/2024 - 12/31/2025

Unit Start End Activity CAC Title Staff Count

Cyber Security - DC 4

1,2 1/29/2024 2/2/2024 IP 71130.10 000741 Cybersecurity

License Renewal 71013 - DC Unit 2 (Phase 1) 3

2 4/8/2024 4/12/2024 IP 71013 001852 Site Inspection for Plants with a Timely Renewal Application

Inservice Inspection - DC (U2) 1

2 4/8/2024 4/19/2024 IP 71111.08P 000702 Inservice Inspection Activities (PWR)

RP 1,3,PI 2

1,2 4/15/2024 4/19/2024 IP 71124.01 000725 Radiological Hazard Assessment and Exposure Controls

1,2 4/15/2024 4/19/2024 IP 71124.03 000727 In-Plant Airborne Radioactivity Control and Mitigation

1,2 4/15/2024 4/19/2024 IP 71151 000746 Performance Indicator Verification

Age-Related Degradation Inspection - Diablo Canyon 3

1,2 6/10/2024 6/14/2024 IP 71111.21N.04 001832 Age-Related Degradation

1,2 6/24/2024 6/28/2024 IP 71111.21N.04 001832 Age-Related Degradation

License Renewal 71002 Followup - DC 4

1,2 6/17/2024 6/28/2024 IP 71002 000686 License Renewal Inspection

Security Equipment (.04), Security Training (.07) 2

1,2 6/24/2024 6/28/2024 IP 71130.04 000736 Equipment Performance, Testing, and Maintenance

1,2 6/24/2024 6/28/2024 IP 71130.07 000739 Security Training

DC 2024 INITIAL EXAM 6

1,2 6/2/2024 6/8/2024 OV 000956 FB-OR-ONSITE VALIDATION OF INITIAL LICENSE EXAMINATION (OV)

1,2 7/14/2024 7/27/2024 EXAD 000500 FB-OR-INITIAL LICENSE EXAM ADMINISTRATION (EXAD)

EP Exercise & PI Inspection (2024) - DC 4

1,2 7/29/2024 8/2/2024 IP 71114.01 000716 Exercise Evaluation

1,2 7/29/2024 8/2/2024 IP 71114.04 000719 Emergency Action Level and Emergency Plan Changes

1,2 7/29/2024 8/2/2024 IP 71151 001397 Performance Indicator Verification

RP 5,6,7,8 4

1,2 8/12/2024 8/16/2024 IP 71124.05 000729 Radiation Monitoring Instrumentation

1,2 8/12/2024 8/16/2024 IP 71124.06 000730 Radioactive Gaseous and Liquid Effluent Treatment

1,2 8/12/2024 8/16/2024 IP 71124.07 000731 Radiological Environmental Monitoring Program

1,2 8/12/2024 8/16/2024 IP 71124.08 000732 Radioactive Solid Waste Processing & Radioactive Material Handling, Storage, & Transportation

License Renewal 71013 - DC Unit 1 (Phase 2) 4

1,2 8/19/2024 8/23/2024 IP 71013 001852 Site Inspection for Plants with a Timely Renewal Application

Prepared on 2/20/2024 10:30:14 AM 2 of 4 Site Inspection Activity Plan

DC 2024 PI&R Inspection 4

1,2 9/9/2024 9/13/2024 IP 71152B 000747 Problem Identification and Resolution

1,2 9/23/2024 9/27/2024 IP 71152B 000747 Problem Identification and Resolution

Security Access Control (.02), Security Plan Changes (.09), Security PIV (71151), Target Sets (71130.14) 1

1,2 10/7/2024 10/11/2024 IP 71130.02 000734 Access Control

1,2 10/7/2024 10/11/2024 IP 71130.09 001656 Security Plan Changes

1,2 10/7/2024 10/11/2024 IP 71130.14 000743 Review of Power Reactor Target Sets

1,2 10/7/2024 10/11/2024 IP 71151 001338 Performance Indicator Verification

FORCE-ON-FORCE PLANNING AND EXERCISE WEEKS - DC 5

1,2 1/13/2025 1/17/2025 IP 71130.03 000735 Contingency Response - Force-On-Force Testing

1,2 2/10/2025 2/14/2025 IP 71130.03 000735 Contingency Response - Force-On-Force Testing

License Renewal 71013 - DC Unit 2 (Phase 2) 4

2 2/24/2025 2/28/2025 IP 71013 001852 Site Inspection for Plants with a Timely Renewal Application

Inservice Inspection- DC (U1) 1

1 4/14/2025 4/25/2025 IP 71111.08P 000702 Inservice Inspection Activities (PWR)

RP 1,4,PI - DC 2

1,2 4/21/2025 4/25/2025 IP 71124.01 000725 Radiological Hazard Assessment and Exposure Controls

1,2 4/21/2025 4/25/2025 IP 71124.04 000728 Occupational Dose Assessment

1,2 4/21/2025 4/25/2025 IP 71151 000746 Performance Indicator Verification

DC 2025 BRQ 2

1,2 6/1/2025 6/7/2025 IP 71111.11B 000704 Licensed Operator Requalification Program and Licensed Operator Performance

Fire Protection Inspection- DC 3

1,2 7/7/2025 7/11/2025 IP 71111.21N.05 001646 Fire Protection Team Inspection (FPTI)

1,2 7/21/2025 7/25/2025 IP 71111.21N.05 001646 Fire Protection Team Inspection (FPTI)

Security Access Control (71130.02), Security Plan Changes (71130.09), Security PIV (71151) 1

1,2 7/7/2025 7/11/2025 IP 71130.02 000734 Access Control

1,2 7/7/2025 7/11/2025 IP 71130.09 001656 Security Plan Changes

1,2 7/7/2025 7/11/2025 IP 71151 001338 Performance Indicator Verification

Cyber Security Inspection - DC 4

1,2 8/11/2025 8/15/2025 IP 71130.10 000741 Cybersecurity

EP 2025 Program Inspection - DC 1

1,2 8/25/2025 8/29/2025 IP 71114.02 000717 Alert and Notification System Testing

1,2 8/25/2025 8/29/2025 IP 71114.03 000718 Emergency Response Organization Staffing and Augmentation System

1,2 8/25/2025 8/29/2025 IP 71114.04 000719 Emergency Action Level and Emergency Plan Changes

1,2 8/25/2025 8/29/2025 IP 71114.05 000720 Maintenance of Emergency Preparedness

1,2 8/25/2025 8/29/2025 IP 71151 001397 Performance Indicator Verification

Prepared on 2/20/2024 10:30:14 AM 3 of 4 Site Inspection Activity Plan

DC 2025 INITIAL EXAM 6

1,2 9/14/2025 9/20/2025 OV 000956 FB-OR-ONSITE VALIDATION OF INITIAL LICENSE EXAMINATION (OV)

1,2 10/26/202511/8/2025 EXAD 000500 FB-OR-INITIAL LICENSE EXAM ADMINISTRATION (EXAD)

Inservice Inspection- DC (U2) 1

2 10/27/202511/7/2025 IP 71111.08P 000702 Inservice Inspection Activities (PWR)

Prepared on 2/20/2024 10:30:14 AM 4 of 4