IR 05000454/2021004

Integrated Inspection Report 05000454/2021004 and 05000455/2021004

ML22042A125
Person / Time
Site:	Byron
Issue date:	02/11/2022
From:	Hironori Peterson Region 3 Branch 3
To:	Rhoades D Constellation Energy Generation, Constellation Nuclear
References
IR 2021004
Download: ML22042A125 (20)

Text

February 11, 2022

SUBJECT:

BYRON STATION - INTEGRATED INSPECTION REPORT 05000454/2021004 AND 05000455/2021004

Dear Mr. Rhoades:

On December 31, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Byron Station. On January 19, 2022, the NRC inspectors discussed the results of this inspection with Mr. J. Kowalski, Site 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 Peterson, Hironori on 02/11/22 Hironori Peterson, Chief Branch 3 Division of Reactor Projects Docket Nos. 05000454 and 05000455 License Nos. NPF-37 and NPF-66

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000454 and 05000455 License Numbers: NPF-37 and NPF-66 Report Numbers: 05000454/2021004 and 05000455/2021004 Enterprise Identifier: I-2021-004-0070 Licensee: Constellation Energy Generation, LLC Facility: Byron Station Location: Byron, IL Inspection Dates: October 01, 2021 to December 31, 2021 Inspectors: S. Bell, Health Physicist C. Thompson, Illinois Emergency Management Agency J. Vera, Senior Resident Inspector J. Weigandt, Resident Inspector Approved By: Hironori Peterson, Chief Branch 3 Division of Reactor Projects Enclosure

SUMMARY

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

Type Issue Number Title Report Section Status URI 05000454, Applicability of Technical 71111.15 Open 05000455/2021004-01 Specifications when Opening Emergency Diesel Generator Roll-Up Doors

PLANT STATUS

Unit 1 began the inspection period operating at 25 percent power after completion of a refueling outage. The unit was returned to full power on October 5, 2021. With the exception of minor reductions in power to support scheduled testing activities and load changes requested by the transmission dispatcher, the unit remained at or near full power for the rest of the inspection period.

Unit 2 began the inspection period operating at full power. With the exception of minor reductions in power to support scheduled testing activities, the unit remained at or near full power for the entire 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, conducted routine reviews using IP 71152, Problem Identification and Resolution, observed risk significant activities, and completed on-site 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.

On February 1, 2022, the operating license for Byron Station held by Exelon Generation Company, LLC was transferred to Constellation Energy Generation, LLC (Constellation) as documented in the associated license amendments (ML22021B659). While some or all of the inspection documented in this report was performed while the license was held by Exelon Generation Company, LLC, this report will refer to the licensee as Constellation throughout.

71111.01 - Adverse Weather Protection

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

(1) The inspectors evaluated readiness for seasonal extreme weather conditions prior to the onset of seasonal cold temperatures during the week ending November 6, 2021.

External Flooding Sample (IP Section 03.03) (1 Sample)

(1) The inspectors evaluated that flood protection barriers, mitigation plans, procedures, and equipment are consistent with the licensees design requirements and risk analysis assumptions for coping with external flooding during the week ending October 30, 2021.

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (2 Samples)

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

(1) Fire Protection system in the Circulating Water Pumphouse (CWPH) during the week ending October 30, 2021

(2) Unit 2 Essential Service Water (SX) associated with crosstie flushing during the week ending November 25, 2021

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (2 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 Zone (FZ) 8.2-2 North: Unit 1 Turbine, elevation 369' during the week ending October 9, 2021

(2) FZs 18.12-0 - CWPH and 18.13-0 - 0B Pump; CWPH during the week ending October 30, 2021

71111.06 - Flood Protection Measures

Inspection Activities - Internal Flooding (IP Section 03.01) (1 Sample)

The inspectors evaluated internal flooding mitigation protections in the:

(1) Auxiliary Building; 401' and 426' elevations during the week ending December 18, 2021

71111.07A - Heat Sink Performance

Annual Review (IP Section 03.01) (1 Sample)

The inspectors evaluated readiness and performance of:

(1) Unit 0 Component Cooling (CC) Water Heat Exchanger (HX) during the week ending October 23, 2021

71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance

Requalification Examination Results (IP Section 03.03) (1 Sample)

(1) The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating exam administered from October 22, 2021 to November 19, 2021.

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 various activities by on-watch operations crews. These activities included, but were not limited to:

1A emergency diesel generator (EDG) monthly run and other day shift activities on October 27, 2021 Downpower to support turbine throttle and governor valve surveillances on October 30, 2021

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

(1) The inspectors observed and evaluated licensed operator requalification training in the simulator on October 20 and October 21, 2021.

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) Maintenance effectiveness on EDG jacket water coolers during the week ending October 23, 2021

(2) Motor Driven Fire Pump maintenance as documented in Work Order (WO) 1938029 during the week ending October 30, 2021

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (6 Samples)

The inspectors evaluated the accuracy and completeness of risk assessments for the following planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed:

(1) 2BISR 3.1.5-2; Unit 2 Response Time Testing Resistance Temperature Detectors as documented in WO 5013686 during the week ending October 16, 2021

(2) Risk management after lube oil pump failed to stop during 2A auxiliary feedwater (AF)pump post-maintenance testing (PMT) during the week ending November 5, 2021

(3) 112 Direct Current Bus ground during the week ending November 5, 2021

(4) Emergent valve work during EDG SX crosstie flush as documented in Action Request (AR) 04462838 during the week ending November 27, 2021

(5) Risk management during a 1A Safety Injection (SI) Pump work window during the week ending December 4, 2021

(6) Risk management during an EDG run during the week ending December 4, 2021

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) Impact of makeup pump on essential service water operability during the week ending October 16, 2021

(2) Operability of fire protection for Unit 1 containment after failure of valve to open on post-maintenance testing during the week ending October 16, 2021

(3) Operability of the 1AF050B AF accumulator after failed leakage test during the week ending October 30, 2021

(4) Silt on FLEX Pipe for SX as documented in AR 04447690 during the week ending October 30, 2021

(5) 2A EDG troubleshooting and air compressor motor replacement activities during the week ending December 11, 2021

(6) 1SI8801B did not fully open during Chemical and Volume Control (CV) surveillance as documented in AR 4325926 during the week ending December 18, 2021

71111.18 - Plant Modifications

Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02)

(1 Sample)

The inspectors evaluated the following temporary or permanent modifications:

(1) Rescale of Reactor Coolant System Loop 2B Delta T/Tave Summing Amplifier Card per Engineering Change (EC) 632514 during the week ending October 23, 2021

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (5 Samples)

The inspectors evaluated the following post-maintenance test activities to verify system operability and functionality:

(1) 1B AF PMT during the week ending October 23, 2021

(2) Bus 213 Inverter 2IP07E Startup and Verify Voltage PMT, as documented in WO 4642985, during the week ending November 5, 2021

(3) 2A AF Pump PMT, as documented in WO 5041277 and 5041533, during the week ending November 5, 2021

(4) 1A CC Pump Motor Run PMT, as documented in WO 5000333, during the week ending November 5, 2021

(5) Motor Driven Fire Pump PMT, as documented in WO 1938029, during the week ending November 5, 2021

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance tests:

Surveillance Tests (other) (IP Section 03.01)

(1) 2B CC pump surveillance during the week ending October 16, 2021

(2) 1B AF PMT during the week ending October 23,

OTHER ACTIVITIES - BASELINE

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

BI01: Reactor Coolant System (RCS) Specific Activity Sample (IP Section 02.10) ===

(1) Unit 1 (April 1, 2020 through September 30, 2021)

(2) Unit 2 (April 1, 2020 through September 30, 2021)

BI02: RCS Leak Rate Sample (IP Section 02.11) (2 Samples)

(1) Unit 1 (October 1, 2021 through September 30, 2021)

(2) Unit 2 (October 1, 2021 through September 30, 2021)

OR01: Occupational Exposure Control Effectiveness Sample (IP Section 02.15) (1 Sample)

(1) October 1, 2020 through September 30, 2021 PR01: Radiological Effluent Technical Specifications/Offsite Dose Calculation Manual Radiological Effluent Occurrences (RETS/ODCM) Radiological Effluent Occurrences Sample (IP Section 02.16) (1 Sample)

(1) April 1, 2020 through September 30, 2021

71152 - Problem Identification and Resolution (PI&R)

Semiannual Trend Review (IP Section 02.02) (1 Sample)

(1) The inspectors reviewed the licensees corrective action program for potential adverse trends in the adequacy of operator logs that might be indicative of a more significant safety issue.

Annual Follow-Up of Selected Issues (IP Section 02.03) (2 Samples)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1) SX water silting issues

(2) SX supply vault inspection frequency

71153 - Follow-Up of Events and Notices of Enforcement Discretion Reporting (IP Section 03.05)

(1) The inspectors evaluated event response and reporting requirements related to the wrong unit error resulting in an unexpected discharge of Unit 1 lower cable spreading room CO2 fire suppression, as documented in AR 4467164, during the week ending December 18,

INSPECTION RESULTS

Unresolved Item Applicability of Technical Specifications when Opening 71111.15 (Open) Emergency Diesel Generator Roll-Up Doors URI 05000454,05000455/2021004-01

Description:

On December 10, 2021, while performing a review of Unit 2 A EDG work activities performed under WO 5196347 (check valve and starting air compressor motor replacement),the inspectors noted that as part of the work the licensee opened the 2A EDG roll-up door "0DSSD167." Records indicated that 0DSSD167 was opened for 8 minutes on the evening of December 9, 2021, and 11 minutes on December 10, 2021, to facilitate movement of a lifting device and air compressor motors during motor replacement.

The inspectors reviewed the Final Safety Analysis Report (FSAR) and saw that the EDG roll-up doors are credited equipment for mitigating a postulated design basis event, including steam system piping failure (Reference Tables 15.0-7 and 15.1-2), and High Energy Line Break (HELB) events. Based on this information the inspectors reviewed the associated work to determine how the licensee evaluated the opening of the roll-up doors. The licensee conducted the activities using the prepared Plant Barrier Impairment (PBI) Permit, (PBI # 21-267) and associated evaluation CC-AA-201-F-02, Plant Barrier Impairment Permit Evaluation. The evaluation stated, in part:

An open roll-up door may affect the operability of BOTH trains of EDG because of HELB considerations on the wall separating the two trains of EDGs. BAP 1100-3A3 Pre-Evaluated Plant Barrier Matrix, directs entry into Limited Condition of Operation Action Requirement (LCOAR) 1/2BOL 8.1 AC sources - Operating for both trains of DG. In lieu of the LCOAR entry, the activity must be planned and conducted to limit the risk to the EDGs. Measures to limit risk include the following:

1. The door is not degraded and is capable of being closed during this activity.

2. The plant should not have steam leaks that are considered imminent HELB threats.

3. The activity should be planned to ensure the large component and the transport device will fit through the door.

4. Personnel shall be ready for transfer of the equipment immediately following opening of the door.

5. In addition, both the door and the equipment shall be in continuous attendance to permit the door to be closed expeditiously if adverse plant conditions develop.

6. The door will be closed and secured (as required) immediately following the equipment move.

These actions will ensure that the risk to the EDGs will be minimal such that LCOAR entry is not required during this activity.

The inspectors reviewed the above information and considered the instantaneous hazards of a HELB event, and questioned whether the identified actions would adequately mitigate the associated risk. The postulated turbine building high energy line break presents a near instantaneous hazard, which may not be reasonably mitigated by the measures listed on the permit or in the evaluation. In addition, the inspectors questioned the reason for not entering the 2-hour Technical Specification (TS) Limited Condition of Operations (LCO) 3.8.1.F for two inoperable EDGs, as the actions taken do not appear to be equivalent to the barrier removed.

This interpretation is based on information contained in RIS 2001-09, Control of Hazard Barriers, which clarifies TS applicability with respect to HELB barriers.

The licensees position is that as the roll-up doors are being used for their intended purpose of ingress/egress for maintenance purposes, the momentary opening of the door would not require entering the LCO. In addition, they are referencing industry position documented on APC 15-31, NEI Regulatory Issues Task Force Position Paper Managing Risk and Operability While Opening Doors on Seismically Qualified Cabinets, as providing basis for their position.

At the end of the inspection period this issue is unresolved, because the inspectors cannot determine whether there is a performance deficiency and will need to consult with the Office of Nuclear Reactor Regulation.

Planned Closure Actions: The inspectors will discuss the information provided during the inspection with the Office of Nuclear Reactor Regulation to determine whether the licensee should have entered the LCO, and whether the mitigative actions were adequate.

Licensee Actions: The licensee is conferring with staff at their other sites to evaluate the consistency and adequacy of current guidance for open barriers.

Corrective Action References: AR 4470117 Observation: Essential Service Water System Vault Inspections Less Frequent 71152 than FSAR License Renewal Commitment Following a recent pipe repair to an SX pipe, its importance, and likelihood of corrosion, the inspectors reviewed the corrective action program for conditions related to SX corrosion. The review revealed that periodically, conditions are being documented related to water intrusion into an SX supply vault. Examples from 2021 included: AR 4427323, "Corrosion on 0SX138A," and AR 4427323, "Water intrusion Into 0SX138A Valve Pit - New tarp needed from June 3, 2021." Inspectors conducted a review into these items because prior work requests and issue report products have indicated challenges in managing the water intrusion. Many of the issue reports were found to be results of periodic inspections per PMID 100304-02, "LR Remove Valve Pit Plug for 0SX138A & Pump Water from Pit as Required." The NRC's review suggests that SX corrosion conditions are being identified and entered into the corrective action program in a timely, complete, and accurate manner.

However, further review into the issue revealed that the vault inspections per PMID 100304-02, were only scheduled with a 144-day periodicity. Current license renewal commitments dictate that the vault inspections be conducted quarterly. (Reference Updated Final Safety Analysis Report Supplement (License Renewal), Revision 019a)

The inspectors questioned licensee staff about the difference and the issue has been documented in AR 4453016, "NRC ID: Preventive Maintenance Frequency for 0SX138A/B Vault Inspections" on October 14, 2021. As a result, the licensee has adjusted the preventative maintenance frequency to quarterly. No findings or violations were identified.

Observation: Inadequate Operating Logs 71152 Inspectors performed a semiannual review to identify trends that might indicate the existence of a more significant safety issue. For their review, the inspectors focused on operating logs and their accuracy. Inspectors reviewed a sampling of quality records of operating logs corresponding to days of activities or equipment status changes, based on the requirements of 10 CFR 50, Appendix B Criterion XVII, "Quality Assurance Records," and licensee procedure OP-AA-111-101 Operating Narrative Logs and Records, Revision 18. During the review, inspectors identified several instances of activities or equipment status not being included in the Operations logs as required. Some examples include:

10/13/2021: Unit 1 output breaker and leading-edge flow monitor issues, which prevented the unit from reaching full power as planned, not logged.

11/3/2021: 'D' Essential Water Cooling Tower (SXCT) Fan out of service, fan status not logged.

11/19-24/2021: 'G' SXCT Fan out of service, fan status not logged.

11/30/2021: Steam Generator blowdown adjustments & water conservation due to Makeup Demin Area Hi/Lo Conductivity sump pump failures, not logged.

12/2/2021: CV pumps in-service testing procedure not entered, pump start not noted, testing only noted completed on logs.

The licensee had also identified some instances of inadequate logs during August 2021, which were documented in AR 4442888. The inspectors noted that corrective actions from the August issue appear to not be comprehensive, as ongoing issues with log keeping were still noted during this inspection period. The inspectors determined that the failure to maintain operating logs of activities affecting quality was a performance deficiency. This performance deficiency was determined to be minor, per Inspection Manual Chapter 0612, Appendix B, because it could not reasonably be viewed as a precursor to a significant event, would not have the potential to lead to a more significant safety concern if left uncorrected, and did not affect the cornerstone objectives. The licensee entered this item into their corrective action program under AR 4470113.

Observation: Silt on FLEX Pipe for SX 71152 On September 21, 2021, during replacement of the 1SX311B pipe, the as found inspection revealed that the pipe downstream of isolation valve 1SX310B was completely plugged with 18 to 24 inches of silt. This is the FLEX supply to the SX booster pump for 1B AF cooling.

The licensee determined 1SX310B is normally closed and at a low point in the room, which allows silt to accumulate. Inspectors noted the silt plug could have had a detrimental effect on operation of the downstream booster pump for 1B AF cooling, and that the capability of the booster pump to provide flow was presumed by assuming dissolution of the silt upon use of the connection. Inspectors challenged the licensee's evaluation in determining possible impact to the ability of the pump to function. Inspectors noted that, although the conditions that might render use of FLEX equipment necessary are extreme, the licensee is still bound by the requirements of Order EA-12-049, which requires provisions for mitigation strategies for beyond-design-basis external events.

Inspectors noted that silt accumulations have been a historic, and ongoing, issue in components that use river water. For example, in December 2021, the licensee wrote trend IR 4467316, which included the 1SX311B pipe, as well as the GL 89-13 failures of three oil coolers. In the past, inspectors have noted the high number of failures to meet acceptance criteria for tube blockage under the licensee's Generic Letter (GL) 89-13 program, and that part of the licensee response has been to eliminate heat exchangers that have failed these inspections.

In the case of the pipe downstream of isolation valve 1SX310B, inspectors found that the issue was outside the licensees ability to foresee and correct. The inspectors did not identify any findings or violations.

EXIT MEETINGS AND DEBRIEFS

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

On January 19, 2022, the inspectors presented the integrated inspection results to Mr. J. Kowalski, Site Vice President, and other members of the licensee staff.

On December 1, 2021, the inspectors presented the radiation protection baseline inspection results to Ms. L. Michigan, Chemistry Manager, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Corrective Action 4453272 NRC Identified Drain Issues and Housekeeping 10/15/2021

Documents

Resulting from

Inspection

Drawings A-500 River Screen House North & South Elevations M

River Screen House Roof Plan HP El 716-0 M

S-423 River Screen House Girt Framing Units 1 & 2 P

Procedures 0BOSR XFT-A1 Freezing Temperature Equipment Protection SH and 20

Department Support Requirements

0BOSR XFT-A3 Freezing Temperature Equipment Protection Plant Ventilation 17

Systems

0BOSR XFT-A4 Freezing Temperature Equipment Protection Protected Area 19

Buildings Ventilation Systems and Tanks

BOP XFT-1 Cold Weather Operations 11

71111.04 Procedures 2BOSR SX-SA1 Unit 2 Diesel Generator Essential Service Water Crosstie Line 21

Semi-Annual Flush

BOP FP-M1 Fire Protection System Lineup 49

BOP SX-M2A Unit 2 Train A Essential Service Water System Valve Lineup 11

BOP SX-M2B Unit 2 Train B Essential Service Water System Valve Lineup 17

Work Orders 5158204 LR-Unit Two Diesel Generator Essential Service Water 11/22/2021

Crosstie Flushing

71111.05 Calculations BYR98-224 Fire Pumps 0FP03PA and 0FP03PB Recirculation Test Line 3

Hydraulic Characterization

Corrective Action 4451523 Used Oil Carboys Stored in Turbine Building 10/07/2021

Documents 4452797 NRC Identified Housekeeping Issues 10/13/2021

Resulting from

Inspection

Fire Plans FPR 2.3.18.28-29 Circulating Water Pump House Diesel-Driven Fire Pump 29

Cubicles (Fire Zones 18.12-0 & 18.13-0)

OP-AA-201-008 Pre-Fire Plan Manual 4

PFP CWPH FZ Pre-Fire Plan Circulating Water Pump House FZ 18.12-0 and 3

18.12-0 18.13-0 18.13-0 Plan #206

Inspection Type Designation Description or Title Revision or

Procedure Date

Procedures MA-AA-716-026 Station Housekeeping/Material Condition Program 19

OP-AA-201-009 Control of Transient Combustible Material 26

71111.06 Calculations 3C8-0787-001 Confirmation of Safe Shutdown Capability After Auxiliary 0

Building Flooding Calculation

3C8-1281-001 Auxiliary Building Flood Level Calculation 12

Corrective Action 4467496 Floor Drain Blocked 12/19/2021

Documents 4467497 Floor Drain Clogged 12/19/2021

4467513 Floor Drain Clogged 12/19/2021

Corrective Action 4464456 NRC ID: 2CV110B Solenoid Electrical Connection Degraded 12/02/2021

Documents

Resulting from

Inspection

Drawings 3771A06 Section Side View CC Pump 6

6E-0-3322 Electrical Installation Auxiliary Building Plan DL

6E-0-4614A Elevation 4160V SWGR - Bus CC Pump C

6E-0-4615C Internal-External Wiring Diagram 4160V CC Pump 0 S H

WGR CUB 3 (0CC01EC)

M-48, Sheet 28 Diagram of Auxiliary Building Leak Detection Sumps C

Units 1 & 2

M-48, Sheet 6A Diagram of Waste Disposal Auxiliary Building Floor Drains AR

M-48, Sheet 6B Diagram of Waste Disposal Auxiliary Building Floor Drains AW

Miscellaneous BB Chapter 03 Water Level (Flood) Design 15a

Sec 04

BB UFSAR Protection Against Dynamic Effects Associated with the 18a

Chapter 03 Sec Postulated Break of Piping

BB UFSAR Attachment D Flooding 16a

Chapter 03.06

Attach D

BB UFSAR Process Auxiliaries 18c

Chapter 9 Section

71111.07A Work Orders 4994269 LR-Support EDDY Current Testing Concurrent with GL 89-13 10/18/2021

71111.11A Procedures TQ-AA-150-F25 LORT Annual Exam Status Report - Byron Generating Station 11/19/2021

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.11Q Procedures 2BGP 100-4T3 Load Change Instruction Sheet for Power Reduction < 15% in 22

One Hour

2BOSR 3.g.3-1 Unit Two Reheat and Intercept Valve Quarterly Surveillance 23

71111.12 Corrective Action 04271704 1B DG Secured due to Water Overflowing 08/14/2019

Documents 04350758 Contingency Weld Repairs Needed for 2B EDG JW Coolers 06/16/2020

04388900 Weld Build Up Required for 1A DG Jacket Water Coolers 12/08/2020

04393165 1A EDG Lower Water Jacket Cooler Refurbishment Required 12/31/2020

04409886 1A EDG Lower Jacket Water Cooler Requires Refurbishment 03/18/2021

04419373 1A DG Jacket Water Lower Cooler 1DG01KA Leaking SX 04/27/2021

04443759 1A EDG Jacket Water Lower Cooler Packed Joint Adjustment 08/31/2021

04444553 Recordable Indication on 1A EDG Jacket Water VT-2 Exam 09/03/2021

4438669 0A FP Pump Recirc Valve Broken 08/03/2021

4458032 0A FP Pp Auto Start Following Surveillance 11/02/2021

Engineering EC 623441 DG Closed System Leak Guidance (Lube Oil, Jacket Water, 03/26/2020

Changes Fuel Oil)

Miscellaneous TRM 3.10.b 3.10.b Fire Suppression Water Supply System (TRM) 121

Work Orders 5067723 LR-Fire Protection Pump Flow and Pressure Test 11/02/2021

5067724 Remove Relief Valve to Support OP Surveillance 11/02/2021

0BOSR 10.B.12-1

71111.13 Corrective Action 4457300 High Ground on DC Bus 112 10/31/2021

Documents AR 04462838 Local Valve Indication 11/23/2021

Corrective Action 4464173 NRC ID: 1A Diesel Generator Components Shaking 12/01/2021

Documents

Resulting from

Inspection

Drawings C14379 Valve Assembly Drawing 218 5

Procedures 1BOSR 8.1.14-1 1A Diesel Generator 24 Hour Endurance Run and Hot Restart 26

Test

1BOSR SX-SA1 Unit One Diesel Generator Essential Service Water 21

Crosstie Line Semi-Annual Flush

2BISR 3.1.15-2 Unit Two Response Time Testing of Installed RTDS 7

2BOL DC1 2BOL LCOAR ESF/Non-ESF Bus DC Grounds 10

DC1

Inspection Type Designation Description or Title Revision or

Procedure Date

2BOSR 3.g.3-1 Unit Two Reheat and Intercept Valve Quarterly Surveillance 23

BAR 1-22-D6 125V DC Bus 112 Ground 7 7

BAR 1-22-D6

Work Orders 05041277 Calibrate Time Delay Relays AF1AX1 and AF1AX2 for 2AF0 11/02/2021

05157109 LR-Unit One Diesel Generator Essential Service Water Cross 11/22/2021

1956590-01 EWP EM - Valve Operator Inspection - 1SI8924 11/30/2021

1956590-02 EWP EM - Valve as Found Diagnostic Testing - 1SI8924 11/29/2021

4807281 Clean Oil System CUNO Filter 11/30/2021

4885908-02 EWP MM: 1VA04SA Support GL 89-13 HX Inspection (LR) 11/30/2021

4940381 Perform Inspection of Motor (1SI01PA-M) 12/01/2021

4997519 MOV PM, Actuator Stem Lubrication - 1SI8923A 11/30/2021

5013686-1 Response Time of Installed RTD'S 10/13/2021

71111.15 Calculations BYR01-068 Environmental Parameters of EQ Zones 2

BYR12-070 Auxiliary Building Environment Following a High Energy Line 2

Break in the Turbine Building

BYR13-011 Evaluation of Doors Along L-Line Wall at Elev 401 and 426 1

BYR13-011

BYR13-028 Evaluation of Block Walls 5A-150, 5A-151, 5A-152, 5A-153 in 0

L-Line Wall for Pressure from a HELB in Conjunction with an

SSE Seismic Event BYR13-028

EQC-BB-007 Diesel Generator Electrical Component Thermal Endurance 2A

Evaluation

Corrective Action 4256052 Valve Leaks By 06/11/2019

Documents 4325926 1SI8801B Failed to Open Fully 03/11/2020

4447690 As Found 1SX311B Plugged with Silt 09/21/2021

4449826 Check Valve 1AF059B Leakage Test Failed 09/30/2021

4449829 Check Valve 1AF058B Failed Leakage Test 09/30/2021

4477690 As Found 1SX311B Plugged with Silt 09/21/2021

Corrective Action 4470110 NRC ID: U1 AF Backup Air System RTS Using 01/05/2022

Documents Troubleshooter

Resulting from 4470117 NRC ID: Question Related to EDG Roll-Up Door Usage 01/05/2022

Inspection

Engineering 379685 SGTR Design Analysis and Licensing Basis Changes 0

Inspection Type Designation Description or Title Revision or

Procedure Date

Changes 391394 Turbine Building High Energy Line Break Design and 12/17/2013

Licensing Basis

Miscellaneous BB UFSAR Accident Analyses 18a

Chapter 15.0

Procedures 1BOSR AF-2B Unit One 1AF005 Train B Accumulator Instrument Air Inlet 6

Line Check Valve Test

BAP 1100-3A3 Pre-Evaluated Plant Barrier Matrix 43

OP-BY-108-115- Byron Operability Determination Guide 2

1000

Work Orders 05164599 0SX02PB Comprehensive IST Req for SX Makeup Pump 08/09/2021

05171381 LR-0BOSR 7.9.6-2, SX Makeup Pump 0B Monthly Operability 08/10/2021

4448030 AF B-Train IA Accumulator Isolation Valve Needs Repaired 09/22/2021

4719606 Perform 1BOSR AF-2B 06/18/2019

4931970 Valve Leaks By 0IA049 09/29/2021

5102241 Perform 1BOSR AF-2B 10/25/2021

71111.18 Corrective Action 4447633 Signal Comparator for 2B OPDT has Failed 09/20/2021

Documents 4448202 EC 632514, Revision 1 - Tracking Activities 09/23/2021

Engineering 632514 Unit 2 RCS Loop Delta T Indication Scaling Change for 1

Changes Immediate Implementation if Delta T Indications are not

Within+/-2% of Calorimetric Power Following B2R22

(Contingency)

Procedures 2BISR 3.1.7-002 Channel Operation Test of Delta T/Tave Loop 2B Protection 18

Channel II (2RC-0421)

2RC-0421 (TRP) Delta T and Tave Protection Loop 2B RC 8

BISR 3.1.10-200 Surveillance Calibration of Delta T and Tave Protection Loop 18

71111.19 Corrective Action 4458032 0A FP Pp Auto Start Following Surveillance 11/02/2021

Documents

Procedures 1BOSR Unit One Comprehensive Inservice Testing (IST) Surveillance 10

5.5.8.CC.5-1C Requirements for Component Cooling Pump 1CC01PA

MA-AA-716-012 Post-Maintenance Testing 26

Work Orders 04642985 WO Needed to Inspect Inverter 2IP07E and Repair as Needed 11/08/2021

05000333 (NEIL) - Perform 5YR Inspection per 1BHS PM-1 11/08/2021

05041533 LR-U2 Motor Driven AF Pump - Clean and Inspect Lube Oil C 09/23/2021

Inspection Type Designation Description or Title Revision or

Procedure Date

1938029-08 OPS PMT -OPS -Perform 0BOSR 10.B.12-1, 11/03/2021

SEC F.2 0FP03PA Only

5034226-23 OPS PMT: Run 1B AF Diesel per BOP AF-7 10/18/2021

71111.22 Procedures 1BOSR 7.5.4-2 Unit One Diesel Driven Auxiliary Feedwater Pump Monthly 35

Surveillance

2BOSR Unit Two Comprehensive Inservice Testing (IST) Surveillance 11

5.5.8.CC.5-2c Requirements for Component Cooling Pump 2CC01PB

2BOSR Unit Two Comprehensive Inservice Testing (IST) Surveillance 11

5.5.8.CC.5-2c Requirements for Component Cooling Pump 2CC01PB

Work Orders 5192571 (NEIL) - 1B AF Pump Surveillance 10/18/2021

71151 Corrective Action AR 04392167 Oil Level Checks for 0WX51/52P 12/26/2020

Documents

Miscellaneous Unit 1 and Unit 2 Reactor Coolant Dose Equivalent Summary Various

Data April 1, 2020 through September 30, 2021

Personnel Exposure Data Fall Outage 2021 Various

Gaseous and Liquid Effluent Radioactive Dose Summary Various

Reports, Second Quarter 2020 through Third Quarter 2021

Procedures BVP 800-30 Essential Service Water Fouling Monitoring Program 18

CY-AA-130-3010 Dose Equivalent Iodine Determination 6

Radiation Surveys Unit 2 Reactor Coolant Sample Gamma Spectroscopy 11/17/2021

Analysis

71152 Corrective Action 4446314 1SX168 Fail Open Test Failed 09/14/2021

Documents 4447170 B1R24 Expanded Scope on 1SX168 09/17/2021

Corrective Action 4452800 NRC Identified Minor Oil Leak 2SX143B 10/13/2021

Documents 4452804 NRC Identified Issue 2CS043A Dried Caustic 10/13/2021

Resulting from 4453016 NRC ID: PM Frequency for 0SX138A/B Vault Inspections 10/14/2021

Inspection 4453268 NRC Observations Discussed at 3Q21 Exit Meeting 10/15/2021

4454784 Learnings from NRC Status Meeting 10/22/2021

4454933 NRC Identified: Small Packing Leak from 2HD002C 10/22/2021

4456932 NRC ID: Loose Bolt on 0DSD325 10/29/2021

4456933 NRC ID: Residual Oil around 1A DG Woodward Governor 10/29/2021

4456935 NRC ID: 1PY-DG8034B is Puffing 10/29/2021

4459965 NRC ID: SX Tower Door D629 Not Operating Correctly Again 11/10/2021

Inspection Type Designation Description or Title Revision or

Procedure Date

4460646 NRC Challenge of SI Accumulator Setpoints 11/13/2021

4464501 NRC ID: 2HD035B Packing Leak 12/03/2021

4464524 NRC Identified PI&R Concerns with 0FP775A MRule and 12/03/2021

Testing

4470113 NRC ID: Operator Logs Missing Some Entries Required by 01/05/2022

Proc

Drawings M-900 sh. 7 Outdoor Piping Essential Service Water at Cooling Tower AN

M-900 sh. 9 Outdoor Piping Section Essential Service Water at Cooling V

Tower

Miscellaneous PMID 100304-02 LR Remove Vlv Pit Plug for 0SX138A & PP Wtr from Pit as 01/14/2016

Required

UFSAR 9.2.1.2 Essential Service Water System 16

Procedures ER-AA-340 GL 89-13 Program Implementing Procedure 10

ER-AA-5400- Raw Water Piping Integrity Management Guide 11

1001

Work Orders 5159318 Water Intrusion Into 0SX138A Valve Pit - New Tarp Needed 11/03/2021

5166970 LR Remove VLV Pit Plug for 0SX138A & PP WTR from Pit as 11/03/2021

Required

71153 Corrective Action 4467164 CO2 Storage Tank Trouble Alarm 12/16/2021

Documents 4467274 Plant Page is not Audible in Some Areas in the Aux Bldg 12/17/2021

Procedures LS-AA-1110 Safety Reportability Manual 31

18