IR 05000269/2021011

Biennial Problem Identification and Resolution Inspection Report 05000269/2021011 and 05000270/2021011 and 05000287/2021011

ML21153A066
Person / Time
Site:	Oconee
Issue date:	06/02/2021
From:	Eric Stamm NRC/RGN-II/DRP/RPB1
To:	Snider S Duke Energy Carolinas
References
IR 2021011
Download: ML21153A066 (11)

Text

June 2, 2021

SUBJECT:

OCONEE NUCLEAR STATION - BIENNIAL PROBLEM IDENTIFICATION AND RESOLUTION INSPECTION REPORT 05000269/2021011 AND 05000270/2021011 AND 05000287/2021011

Dear Mr. Snider:

On May 13, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed a problem identification and resolution inspection at your Oconee Nuclear Station 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.

The NRC inspection team reviewed the stations corrective action program and the stations implementation of the program to evaluate its effectiveness in identifying, prioritizing, evaluating, and correcting problems, and to confirm that the station was complying with NRC regulations and licensee standards for corrective action programs. Based on the samples reviewed, the team determined that your staffs performance in each of these areas adequately supported nuclear safety.

The team also evaluated the stations processes for use of industry and NRC operating experience information and the effectiveness of the stations audits and self-assessments.

Based on the samples reviewed, the team determined that your staffs performance in each of these areas adequately supported nuclear safety.

Finally, the team reviewed the stations programs to establish and maintain a safety conscious work environment and interviewed station personnel to evaluate the effectiveness of these programs. Based on the teams observations and the results of these interviews the team found no evidence of challenges to your organizations safety conscious work environment. Your employees appeared willing to raise nuclear safety concerns through at least one of the several means available.

No findings or violations of more than minor significance were identified during this inspection. This letter, its enclosure, and your response (if any) 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.

Sincerely,

/RA/

Eric J. Stamm, Chief Reactor Projects Branch #1 Division of Reactor Projects Docket Nos. 05000269 and 05000270 and 05000287 License Nos. DPR-38 and DPR-47 and DPR-55

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000269, 05000270 and 05000287 License Numbers: DPR-38, DPR-47 and DPR-55 Report Numbers: 05000269/2021011, 05000270/2021011 and 05000287/2021011 Enterprise Identifier: I-2021-011-0028 Licensee: Duke Energy Carolinas, LLC Facility: Oconee Nuclear Station Location: Seneca, SC Inspection Dates: April 26, 2021 to May 13, 2021 Inspectors: B. Bishop, Senior Project Engineer S. Bussey, Senior Reactor Technology Instructor R. Cureton, Resident Inspector A. Ruh, Resident Inspector J. Worosilo, Senior Project Engineer (team lead)

Approved By: Eric J. Stamm, Chief Reactor Projects Branch #1 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a biennial problem identification and resolution inspection at Oconee Nuclear Station, in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.

List of Findings and Violations

No findings or violations of more than minor significance were identified.

Additional Tracking Items

None.

INSPECTION SCOPES

Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.

OTHER ACTIVITIES - BASELINE

71152B - Problem Identification and Resolution Biennial Team Inspection (IP Section 02.04)

The inspectors performed a biennial assessment of the licensees corrective action program, use of operating experience, self-assessments and audits, and safety conscious work environment.

• Corrective Action Program Effectiveness: The inspectors assessed the corrective action programs effectiveness in identifying, prioritizing, evaluating, and correcting problems. The inspectors also conducted an in-depth corrective action program review of the emergency feedwater system, reactor protection system, and low-pressure injection system.

• Operating Experience, Self-Assessments and Audits: The inspectors assessed the effectiveness of the stations processes for use of operating experience, audits and self-assessments.

• Safety Conscious Work Environment: The inspectors assessed the effectiveness of the stations programs to establish and maintain a safety conscious work environment.

INSPECTION RESULTS

Assessment 71152B 1. Corrective Action Program Effectiveness Problem Identification: The inspectors determined that the licensee was effective in identifying problems and entering them into the corrective action program and there was a low threshold for entering issues into the corrective action program. This conclusion was based on a review of the requirements for initiating condition reports as described in licensee procedure AD-PI-ALL-0100, "Corrective Action Program," and managements expectation that employees were encouraged to initiate condition reports. Additionally, site management was actively involved in the corrective action program and focused appropriate attention on significant plant issues.

Problem Prioritization and Evaluation: Based on the review of condition reports, the inspectors concluded that problems were prioritized and evaluated in accordance with the condition report significance determination guidance in procedure AD-PI-ALL-0100. The inspectors determined that adequate consideration was given to system or component operability and associated plant risk. The inspectors determined that plant personnel had conducted cause evaluations in compliance with the licensees corrective action program procedures and cause determinations were appropriate, and considered the significance of the issues being evaluated.

Corrective Actions: Based on a review of corrective action documents, interviews with licensee staff, and verification of completed corrective actions, the inspectors determined that corrective actions were timely, commensurate with the safety significance of the issues, and effective, in that conditions adverse to quality were corrected. For significant conditions adverse to quality, the corrective actions directly addressed the cause and effectively prevented recurrence. The inspectors reviewed condition reports and effectiveness reviews to verify that the significant conditions adverse to quality had not recurred. Effectiveness reviews for corrective actions to preclude repetition (CAPRs) were sufficient to ensure corrective actions were properly implemented and were effective.

Based on the samples reviewed, the team determined that the licensees corrective action program complied with regulatory requirements and self-imposed standards. The licensees implementation of the corrective action program adequately supported nuclear safety.

2. Operating Experience

The inspectors determined that the station's processes for the use of industry and NRC operating experience information and for the performance of audits and self-assessments were effective and complied with all regulatory requirements and licensee standards. The implementation of these programs adequately supported nuclear safety. The inspectors concluded that operating experience was adequately evaluated for applicability and that appropriate actions were implemented to address lessons learned as needed.

3. Self-Assessments and Audits

The inspectors determined that the licensee was effective at performing self-assessments and audits to identify issues at a low level, properly evaluated those issues, and resolved them commensurate with their safety significance.

Self-assessments were generally detailed and critical. The inspectors verified that condition reports (CRs) were created to document areas for improvement and findings resulting from self-assessments, and verified that actions had been completed consistent with those recommendations. Audits of the quality assurance program appropriately assessed performance and identified areas for improvement. Generally, the licensee performed evaluations that were technically accurate.

4. Safety Conscious Work Environment

Based on interviews with plant staff and reviews of the latest safety culture survey results to assess the safety conscious work environment on site, the inspectors found no evidence of challenges to the safety conscious work environment. Employees appeared willing to raise nuclear safety concerns through at least one of the several means available.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

• On May 13, 2021, the inspectors presented the biennial problem identification and resolution inspection results to Steve Snider and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71152B Calculations MCC-1381.05-00- U1/2, 125VDC Vital I&C Power System {EPL) Voltage Drop Rev. 9

230 Analysis (Priority E Calc)

MCC-1381.05-00- Interim U1/2, 125VDC Vital I&C Power System {EPL) Voltage 7-25-13

230-07 Drop Analysis (Deleted)

MCM 1312.02- ABB 5HK Switchgear Test Report 7-15-09

0106.001

OSC-4701 125Vdc Safety Related Instrumentation and Control Batteries 4-15-92

Adequate Voltage Calc

OSC-5390 Software CHECKMATE Erosion/Corrosion Model 4-13-94

OSC-6143 Unit 2 MCC Contactor Voltage Adequacy and Fuse Rev. 16

Adequacy Verification - TYPE III

OSC-6144 MCC Contactor Voltage Adequacy and Fuse Adequacy Rev. 20

Verification - TYPE III

OSC-8113 125 VDC Vital Instrumentation and Control Load Profile, Rev. 0

Battery Sizing, and Voltage Analysis

Corrective Action NCRs 02269795, 02309647, 02309671, 02335894, 02341117,

Documents 02352787, 02362961, 02314538, 02361916, 02356261,

2357711, 02361916, 02341629, 02340440, 02282444,

295613, 02256202, 02333633, 02257253, 02261761,

268202, 02269738, 02274034, 02277429, 02281459,

293646, 02304822, 02307234, 02315082, 02323650,

2333220, 02347668, 02270339, 02250059, 02343949,

2343959, 02343569, 02222499, 02349539, 02348945,

01822440, 01905832, 01864283, 01908928, 01956662,

2066214, 02310567, 01904970, 02262484, 02329275,

2351294, 02256202, 02333633, 02257253, 02261761,

268202, 02269738, 02274034, 02277429, 02281459,

293646, 02304822, 02307234, 02315082, 02323650,

2333220, 02347668, 02270339, 02250059, 02328602,

Inspection Type Designation Description or Title Revision or

Procedure Date

2352822, 02363249, 02360656, 02360494, 02238263,

2326415, 02325889, 02326176, 02331299, 02250109,

2323998, 02277641, 02267247, 02265030, 02329676,

2353408, 02329830, 02239742, 02282867, 02282868,

275113, 02281249, 02269890, 02290751, 02286162,

282206, 02304449, 02236005, 02324405, 02248209,

282206, 02271065, 02262751, 02318395, 02326169,

2337132, 02344954, 02321306, 02267791, 02367963,

255084, 02256571, 02256573, 02271477, 02271899,

279383, 02282406, 02337132, 02344648, 02348328,

2354874, 02106867, 02357910, 02346616, 02367963,

262751, 02247754, 02266788, 02267643, 02267791,

276356, 02277471, 02286365, 02298053, 02301572,

2359235, 02374107, 02332992, 02263817, 02307294,

2343319, 02344954, 02292607, 02304321, 02318336,

2323708, 02326169, 02333218, 02357623, 02260902,

2315317, 02321306, 02271065, 02370845, 02267392,

294622, 02347792, 02318395, 02356261, 02357711,

2361916, 02341629, 02340440, 02306767, 02271172,

262751, 02318395, 02326169, 02337132, 02344954,

2321306, 02357959, 02337133, 02345510, 01665443,

01626129, 01991686, 02327869, 02335984, 02304504,

2374869, 02350366, 02343376, 02343461

PRRs 02369913, 02369915, 02348486, 02335129, 02361878,

2363003, 02363118, 02363775, 02364060, 02364437,

2364479, 02364602, 02365937, 02366403, 02365093,

2341872, 02341873, 02341874, 02342007, 02374078

TRFs 02335423, 02326402, 02357345, 02357546, 02357547,

2337192, 02341991

Engineering EC 403968 Cyber Install a New SIEM Rev. 6

Changes EC 417326

EC 418297 Revise IPB Cooling Fan Fuse Type to Increase Margin Rev. 0

Inspection Type Designation Description or Title Revision or

Procedure Date

Operability 2273899, 2301011, 2282444, 2295613, 2267791, 2367963

Evaluations

Procedures AD-EG-ALL-1522 Duties of a Compensatory Fire Watch Rev. 13

AD-HU-ALL-0003 Conduct of Pre-Job Briefs and Post-Job Critiques Rev. 10

AD-HU-ALL-0005 Human Performance Tools Rev. 5

AD-LS-ALL-0003 NRC Audit and Inspection Activities Rev. 9

AD-MN-ALL-0004 Minor Maintenance Rev. 7

AD-OP-ALL-0105 ODP Reference Guide

AD-OP-ALL-0110 General Equipment Operating Standards Rev. 3

AD-OP-ALL-0200 Clearance and Tagging Rev. 21

AD-OP-ALL-0201 Protected Equipment Rev. 8

AD-OP-ALL-0204 Plant Status Control Rev. 5

AD-RP-ALL-0002 Radiation and Contamination Surveys Rev. 2

AD-RP-ALL-1000 Conduct of Radiation Protection Rev. 5

AD-RP-ALL-5000 Preparation and Shipment of Radioactive Material and Rev. 4

Radioactive Waste

IP/0/A/3011/016 Motor Control Center, Distribution Center, and Power Rev. 14

Panelboard Preventative Maintenance

Work Orders WOs 01868728, 20077646-01, 20393023, 20329162, 20355427,

20335677, 20304652, 20304194, 20341553, 20370120,

20360288, 20419101, 20440072, 20424831, 20453294,

20460178, 20295098, 20434939, 20415424, 20303569,

2094851, 20420403, 20421062

WRs 20173644, 20184670, 20186718, 20193768, 20197868,

20156589, 20160991, 20185090, 20153676, 20134414,

20136438, 20140847, 20143385, 20145287, 20135677,

20153774, 20129909, 20161424, 20165600, 20164418,

20183175, 20183017, 20147905, 20148331, 20154895,

20162941, 20162548, 20165142, 20165148, 20190980,

20179923, 20186117, 20184649, 20179143

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