IR 05000275/2024403

Cyber Security Inspection Report 05000275/2024403 and 05000323/2024403 (Cover Letter)

ML24060A075
Person / Time
Site:	Diablo Canyon
Issue date:	03/12/2024
From:	Nick Taylor NRC/RGN-IV/DORS/EB2
To:	Gerfen P Pacific Gas & Electric Co
References
IR 2024403
Download: ML24060A075 (4)

Text

March 10, 2024

SUBJECT:

DIABLO CANYON POWER PLANT - CYBER SECURITY INSPECTION REPORT 05000275/2024403 AND 05000323/2024403

Dear Paula A. Gerfen:

On February 7, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Diablo Canyon Power Plant and discussed the results of this inspection with you and other members of your staff. The results of this inspection are documented in the enclosed report.

One finding of very low security significance (Green) is documented in this report. This finding involved a violation of NRC requirements. We are treating this violation as a non-cited violation (NCV) consistent with Section 2.3.2 of the Enforcement Policy.

If you contest the violation or the significance or severity of the violation documented in this inspection report, you should provide a response within 30 days of the date of this inspection report, with the basis for your denial, to the U.S. Nuclear Regulatory Commission, ATTN:

Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region IV; the Director, Office of Enforcement; the Director, Office of Nuclear Security and Incident Response; and the NRC Resident Inspector at Diablo Canyon Power Plant.

The following cross cutting aspect was assigned to a finding using Inspection Manual Chapter 0310 Aspects Within Cross Cutting Areas: [H.13] - Consistent Process.

If you disagree with a cross-cutting aspect assignment in this report, you should provide a response within 30 days of the date of this inspection report, with the basis for your disagreement, to the U.S. Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region IV; the Director, Office of Nuclear Security and Incident Response; and the NRC Resident Inspector at Diablo Canyon Power Plant. This letter will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html 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.

The enclosed report contains Security-Related Information, so the enclosed report will not be made publicly available in accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390(d)(1). If you choose to provide a response that contains Security-Related Information, please mark your entire response Security-Related Information-Withhold from public disclosure under 10 CFR 2.390 in accordance with 10 CFR 2.390(d)(1) and follow the instructions for withholding in 10 CFR 2.390(b)(1). The NRC is waiving the affidavit requirements for your response in accordance with 10 CFR 2.390(b)(1)(ii).

Sincerely, Nicholas H. Taylor, Chief Engineering Branch 2 Division of Operating Reactor Safety Docket Nos. 05000275, 05000323 License Nos. DPR-80, DPR-82 Enclosure:

As stated cc w/o encl: Distribution via LISTSERV Signed by Taylor, Nicholas on 03/10/24 SUBJECT: DIABLO CANYON POWER PLANT - CYBER SECURITY INSPECTION REPORT 05000275/2024403 AND 05000323/2024403 DATED MARCH 10, 2024

DISTRIBUTION:

JMonninger, ORA JLara, ORA GMiller, DORS MHay, DORS FGaskins, RIV/OEDO DCylkowski, RC VDricks, ORA LWilkins, OCA SLee, NRR AMoreno, RIV/OCA RAlexander, RSLO PVossmar, DORS RBywater, DORS VLee, DORS MHayes, DORS AAthar, DORS MZiolkowski, RI DSchroeder, RI JWorosilo, RII JClark, NSIR-SPEB NTaylor, DORS GDentel, DORS, RI DBacon, DRS, RII JGilliam, DRS, RIII AElam, DORS R4-DRSS-PSB R4-DORS-IPAT R4Enforcement SOSB Insp Rpt Distro SOSBInspRptDistro@usnrc.onmicrosoft.com NSIR-DPCP-CSB@usnrc.onmicrosoft.comgroup ML24060A076(Cover letter w/ enclosure(s))

Non-Public Designation Category: MD 3.4 Non-Public (A.3 - A.7 or B.1)

ADAMS ACCESSION NUMBERML24060A075 (Cover letter)

Entire Report: Non-Sensitive Publicly Available SUNSI Review Sensitive Non-Publicly Available Cover Letter Only: Non-Sensitive Publicly Available SUNSI Review Sensitive Non-Publicly Available OFFICE SRI:DORS/EB2 RI:DORS/EB2 C:DORS/EB2 NAME S. Graves N. Okonkwo N. Taylor SIGNATURE /RA/ /RA/ /RA/

DATE 03/04/2024 03/04/24 03/10/24