Text

Integrated Inspection Report 05000397/2023003
	ML23290A269
Person / Time
Site:	Columbia
Issue date:	10/25/2023
From:	Patricia Vossmar; NRC/RGN-IV/DORS/PBA
To:	Schuetz R; Energy Northwest
References
	IR 2023003
	Download: ML23290A269 (14)
	v • d • e

October 25, 2023

SUBJECT:

COLUMBIA GENERATING STATION - INTEGRATED INSPECTION REPORT 05000397/2023003

Dear Robert Schuetz:

On September 30, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Columbia Generating Station. On October 12, 2023, the NRC inspectors discussed the results of this inspection with Dave Brown, Operations Vice President, and other members of your staff. The results of this inspection are documented in the enclosed report.

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, Signed by Vossmar, Patricia on 10/25/23 Patricia J. Vossmar, Chief Reactor Projects Branch A Division of Operating Reactor Safety Docket No. 05000397 License No. NPF-21

Enclosure:

As stated

Inspection Report

Docket Number: 05000397 License Number: NPF-21 Report Number: 05000397/2023003 Enterprise Identifier: I-2023-003-0005 Licensee: Energy Northwest Facility: Columbia Generating Station Location: Richland, WA Inspection Dates: July 01, 2023, to September 30, 2023 Inspectors: A. Donley, Senior Resident Inspector R. Bywater, Senior Project Engineer J. Copeland, Reactor Inspector M. Hayes, Senior Resident Inspector J. Melfi, Project Engineer Approved By: Patricia J. Vossmar, Chief Reactor Projects Branch A Division of Operating Reactor Safety Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Columbia Generating 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.

PLANT STATUS

Columbia Generating Station (CGS) began the inspection period at rated thermal power (RTP).

On July 2, 2023, the unit reduced power to 85 percent for emergent adjustable speed drive (ASD) maintenance. On July 4, 2023, ASD maintenance was completed, and the plant returned to 100 percent RTP. On July 10, 2023, the unit was again reduced to 85 percent for planned ASD maintenance. Maintenance was completed on July 11, 2023, and the unit returned to 100 percent RTP. On August 3, 2023, the unit was reduced to 65 percent for planned ASD maintenance and returned to 100 percent RTP that same day. On September 20, 2023, the unit emergently decreased power to 92 percent due to issues with the condensate demineralizer system and following maintenance, the unit was returned to 100 percent RTP on September 21, 2023. On September 23, 2023, the unit was lowered to 80 percent for planned surveillance testing and returned to 100 percent RTP that same day. The unit remained at RTP for the rest of the inspection period.

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 performed activities described in IMC 2515, Appendix D, Plant Status, observed risk significant activities, and completed onsite portions of IPs. 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.

REACTOR SAFETY

71111.01 - Adverse Weather Protection

Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated readiness of the adjustable speed drive A and B standby glycol heat exchanger fans and normal transformer TR-N1 and TR-N2 cooling sprays for extreme weather conditions prior to the onset of seasonal high temperatures on August 17, 2023.

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (3 Samples)

The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:

(1) residual heat removal system C when low pressure core spray was out of service for maintenance on July 10, 2023

(2) high-pressure core spray system when reactor core isolation cooling system was out of service for maintenance on September 12, 2023

(3) standby gas treatment system A while standby gas treatment system B was out of service for maintenance on September 26, 2023

Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated system configurations during a complete walkdown of diesel generator 3 on September 20, 2023.

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 Samples)

The inspectors evaluated the implementation of the fire protection program by conducting a walkdown and performing a review to verify program compliance, equipment functionality, material condition, and operational readiness of the following fire areas:

(1) fire area SW-1, standby service water pump house A, on August 10, 2023

(2) fire area RC-10/U, control room, on August 10, 2023

(3) fire area 5010-3, secondary essential fire suppression water supply building 33, on August 22, 2023

(4) fire area R-3, high-pressure core spray pump room, on September 12, 2023

Fire Brigade Drill Performance Sample (IP Section 03.02) (2 Samples)

(1) The inspectors evaluated the onsite fire brigade training and performance during an announced fire drill on July 13, 2023.

(2) The inspectors evaluated the onsite fire brigade training and performance during an unannounced fire drill on September 26, 2023.

71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance

Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01)

(1 Sample)

(1) The inspectors observed and evaluated licensed operator performance in the control room during planned control rod sequence exchange on September 23, 2023.

Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated the cycle 23-3 evaluated scenario on July 25, 2023.

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (2 Samples)

The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components (SSCs) remain capable of performing their intended function:

(1) 10 CFR 50.65(a)(3) periodic assessment for the period of January 1, 2021, to December 31, 2022, on August 23, 2023

(2) condensate demineralizer inlet valve C repair and replacement, following failure on September 19, 2023

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated the accuracy and completeness of risk assessments for the reactor core isolation cooling system planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed on September 11, 2023.

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (6 Samples)

The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:

(1) CR 444515, stroke times found out of tolerance during OSP-MS/IST-Q701, main steam isolation valve closure test - shutdown, completed on July 18, 2023

(2) CR 449521, one service water B spray ring header nozzle clogged in the service water A pond, completed on August 21, 2023

(3) CR 448300, reactor water sample line inner isolation valve RRC-V-19 failed to isolate flow during quarterly inservice testing, on August 31, 2023

(4) CR 450082, high-pressure core spray pump 2 discharge valve, SW-V-29, actuator mounting bolts found with less thread engagement than specified in plant procedure 10.2.10, on September 11, 2023

(5) CR 448641, foreign material found in drywell floor drain flow transmitter FDR-FT-38, completed on September 22, 2023

(6) CR 449747, disagreement between procedure requirements and design basis calculation for time critical operator actions for flooding in the low pressure core spray pump room, completed on September 29, 2023

71111.24 - Testing and Maintenance of Equipment Important to Risk

The inspectors evaluated the following testing and maintenance activities to verify system

operability and/or functionality: Post-Maintenance Testing (PMT) (IP Section 03.01)

Main article: IP 71111.24

(1) WO 02194701, replacement of SW-V-822A, supply isolation valve to cooling coil 51A-1, on August 8, 2023

(2) WO 02210840, investigation of traversing in-core probe B flux following refueling outage 26, on August 28, 2023

(3) WO 02210870, reactor core isolation cooling out of service, on September 11, 2023

Surveillance Testing (IP Section 03.01) (2 Samples)

(1) TSP-CONT-R801, containment isolation valve and penetration leak test program, on July 25, 2023

(2) 15.3.17, fire door operability inspections, on September 6, 2023

Inservice Testing (IST) (IP Section 03.01) (1 Sample)

(1) OSP-CCH/IST-M701, control room emergency chiller system A operability, on August 14, 2023

Reactor Coolant System Leakage Detection Testing (IP Section 03.01) (1 Sample)

(1) ISP-FDR/EDR-X301, drywell sump flow monitors channel calibration, on July 21, 2023

Diverse and Flexible Coping Strategies (FLEX) Testing (IP Section 03.02) (1 Sample)

(1) OSP-FLEX-Q705, diesel generator 5 quarterly surveillance, following annual maintenance, on July 17, 2023

71114.06 - Drill Evaluation

Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated the team A emergency preparedness drill on August 29,

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:

MS06: Emergency AC Power Systems (IP Section 02.05) ===

Main article: IP 71151