IR 05000266/2024010
| ML24191A421 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 07/10/2024 |
| From: | Karla Stoedter NRC/RGN-III/DORS/EB1 |
| To: | Durbin M Point Beach |
| References | |
| IR 2024010 | |
| Download: ML24191A421 (1) | |
Text
SUBJECT:
POINT BEACH NUCLEAR PLANT - AGE-RELATED DEGRADATION INSPECTION REPORT 05000266/2024010 AND 05000301/2024010
Dear Michael Durbin:
On June 21, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Point Beach Nuclear Plant and discussed the results of this inspection with Eric Schultz, Regulatory Assurance Manager, and other members of your staff. The results of this inspection are documented in the enclosed report.
One finding of very-low safety significance (Green) is documented in this report. This finding did not involve a violation of NRC requirements.
If you disagree with a cross-cutting aspect assignment or a finding not associated with a regulatory requirement 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 III; and the NRC Resident Inspector at Point Beach Nuclear Plant.
July 10, 2024 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, Karla Stoedter, Branch Chief Engineering Branch 1 Division of Operating Reactor Safety Docket Nos. 05000266 and 05000301 License Nos. DPR-24 and DPR-27
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000266 and 05000301
License Numbers:
Report Numbers:
05000266/2024010 and 05000301/2024010
Enterprise Identifier:
I-2024-010-0052
Licensee:
NextEra Energy Point Beach, LLC
Facility:
Point Beach Nuclear Plant
Location:
Two Rivers, WI
Inspection Dates:
April 29, 2024 to June 21, 2024
Inspectors:
K. Fay, Senior Reactor Inspector
E. Fernandez, Senior Reactor Inspector
T. Hartman, Senior Project Engineer
Approved By:
Karla Stoedter, Branch Chief
Engineering Branch 1
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an age-related degradation inspection at Point Beach Nuclear Plant, 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
Failure to Inspect the Fire System Accumulator Tank Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green FIN 05000266,05000301/2024010-01 Open/Closed
[H.8] -
Procedure Adherence 71111.21N.
The inspectors identified a finding of very-low safety significance (Green) for the licensees failure to inspect a portion of the fire protection system. Specifically, the licensee failed to ensure the bottom of the fire protection accumulator tank was free of oil, dirt, or other extraneous matter which could obscure surface defects such as pitting, cracking, and erosion prior to examining the tanks internal bottom surface. In addition, an action request was not initiated when indications of corrosion were discovered.
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.
REACTOR SAFETY
71111.21N.04 - Age-Related Degradation Age-Related Degradation
- (1) Cable Spreading Room Air Conditioning Unit Chiller (HX-38A)
- (2) Cable Spreading Room Fan Motors (W-13A1/A2)
- (3) Fire Protection System Accumulator Tank (T-73)
- (4) G-01 Emergency Diesel Generator (EDG) Service Water Strainer (F-215)
- (5) G-01/G-02 EDG Air Start Receiver Tanks (T-60/T-61)
- (6) G-05 Gas Turbine Battery (D501)
- (7) G-05 Gas Turbine Turning Gear (Z-500)
- (8) P-32A Service Water Pump Flexible Expansion Joint (XJ-2974A)
- (9) Spent Fuel Pool Heat Exchanger Service Water Inlet Valves (SW-2927A/B)
- (10) Unit 1 Rod Position Indication System Cabling
- (11) Unit 2 Crossover Steam Dump Valve (2-OS-4-DV)
- (12) Unit 2 Service Water Outlet Radiation Monitor (2RE-229)
INSPECTION RESULTS
Failure to Inspect the Fire System Accumulator Tank Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green FIN 05000266,05000301/2024010-01 Open/Closed
[H.8] -
Procedure Adherence 71111.21N.0 The inspectors identified a finding of very-low safety significance (Green) for the licensees failure to inspect a portion of the fire protection system. Specifically, the licensee failed to ensure the bottom of the fire protection accumulator tank was free of oil, dirt, or other extraneous matter which could obscure surface defects such as pitting, cracking, and erosion prior to examining the tanks internal bottom surface. In addition, an action request was not initiated when indications of corrosion were discovered.
Description:
Point Beach Nuclear Plant established procedure LR-AMP-010-FP, Fire Protection Program Basis Document for License Renewal, as one of the implementing procedures for their license renewal (LR) program. The purpose of this procedure is to monitor system aging, specifically for the fire protection system, during the period of extended operation, which they entered in 2010. Procedure LR-AMP-010-FP describes the fire protection system as consisting of a 10 inch ring header fire main laid underground around the plant. The main is connected to the discharge side of each of two fire pumps. This ring header supplies water to the suppression system piping inside the plant. The distribution piping supplies the wet pipe sprinkler systems, dry pipe sprinkler systems, deluge systems, the pre-action system, and hose stations throughout the plant. This system is pressurized by an accumulator and jockey pump, and an air compressor which maintains system pressure and level in the accumulator tank. Attachment B to this procedure specifies implementing preventative maintenance requirement (PMRQ) 60968-01, which requires the licensee to open and inspect the fire system accumulator tank. Per the licensees preventative maintenance program this inspection is performed every 2 years.
The inspectors reviewed the fire protection system accumulator tank (T-73) inspection results and requested the last several completed work orders (WO). Preventative maintenance requirement 60968-01 was most recently implemented by performance of WO 40796864.
The WO included instructions to perform an inspection (LR requirement) in accordance with maintenance instruction (MI) 32.14, Visual Inspections for License Renewal, Revision 6.
Maintenance Instruction 32.14, Step 3.1 states, The examination surface shall be free of oil, dirt or other extraneous matter which could obscure surface defects. Surface preparation may include cleaning with solvents, brushing or other methods that would not gouge or smear the surface so as to mask indications. Step 3.2 defines surface defects as pitting, cracking and erosion.
The completed WO included pictures of the internal surface of the tank after it was cleaned.
The inspectors reviewed the results of the WO and noted the pictures showed several areas of corrosion across a significant portion of the inside of the bottom of the accumulator tank.
This condition could obscure surface defects because it would not allow the licensee to detect, via visual inspection, any pitting, cracking, or erosion occurring beneath the corrosion.
In addition, the WO had instructions to initiate an action request if indications of corrosion are discovered (LR requirement). This step was not performed as indicated by an N/A [not applicable] in the signature field.
The inspectors concluded the inspection was not performed as required and that the identification of corrosion products inside the bottom of the tanks were not entered into their corrective program.
Corrective Actions: The licensee entered this issue into their corrective action program and planned to have the License Renewal Engineer review the Aging Management Program to determine if additional testing is needed to address the aging of the tank.
Corrective Action References: AR 02486433
Performance Assessment:
Performance Deficiency: The licensees failure to inspect the fire system accumulator tank in accordance with LR-AMP-010-FP, Fire Protection Program Basis Document for License Renewal, and to write an action request when corrosion was discovered was a performance deficiency. Specifically, the licensee failed to ensure the internal bottom surfaces of the fire system accumulator tank were free from oil, dirt, or other extraneous matter which could obscure surface defects prior to inspecting the bottom of the tank. As a result, the licensee could not conclude the tanks license renewal inspection was complete. This identification of corrosion inside the tanks bottom was also not documented within the corrective action program.
Screening: The inspectors determined the performance deficiency was more than minor because it was associated with the Protection Against External Factors attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to inspect the bottom of the fire system accumulator tank reduced the ability to ensure the tank would not fail adversely affecting the fire protection system.
Significance: The inspectors assessed the significance of the finding using IMC 0609 Appendix F, Fire Protection and Post - Fire Safe Shutdown SDP. The inspectors screened the finding using IMC 0609, Appendix F, Attachment 1, Part 1: Fire Protection SDP Process Worksheet, and answered yes to Question 1.4.3, Would adequate fire water capacity (flow at required pressure) still be available for protection of equipment important to safe shutdown in the most limiting location onsite? The failure to inspect the fire system accumulator tank did not impact the fire protection systems ability to reach the most limiting location.
Therefore, the inspectors determined that the finding screened as having very-low safety significance (Green).
Cross-Cutting Aspect: H.8 - Procedure Adherence: Individuals follow processes, procedures, and work instructions. Specifically, the licensee failed to properly prepare the surface prior to an inspection as required by MI 32.14 instructions.
Enforcement:
The inspectors did not identify a violation of regulatory requirements associated with this finding.
EXIT MEETINGS AND DEBRIEFS
The inspectors confirmed that proprietary information was controlled to protect from public disclosure.
- On June 21, 2024, the inspectors presented the age-related degradation inspection results to Eric Schultz, Regulatory Assurance Manager, and other members of the licensee staff.
- On May 17, 2024, the inspectors presented the age-related degradation initial inspection results to Michael Durbin, Site Vice President, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Calculations
2005-0050
Primary Auxiliary Building and Control Building Electrical
Heat Load Calculation
EDG Air Receiver Tank Min Wall Calculations
11/20/2009
License Renewal Examination Results for T-073 Tank
11/02/2009
License Renewal Exam of K-006 Compressor for 0T-073
Tank
04/24/2010
Acceptance Criteria Not Met on T-060/61 UT Inspection
for LR
11/24/2015
Inadequate MWO Causes Lack of Schedule Adherence
04/26/2012
UT Results Below Trigger Value for T-60/T-61 Exams
03/10/2015
T-60D EDG Air Receiver Wall Thickness Readings Below
T-min
2/08/2017
1RE229 SWOB Sample Pump Vibration
2/12/2018
O-Rings not Available for SW Strainer
11/20/2018
Minor Leak on F-215 EDG Inlet Strainer
01/16/2020
G01 SW Duplex Strainer Unable to be Cleaned
07/28/2020
W-13A1 Cable Spreading Room Recirc Fan Will Not Start
2/16/2020
F-215 G-01 Strainer Cover Seepage
2/31/2021
G-05 Stop Push Button High Resistance
05/26/2022
PI-6739 Discharge Pressure Indicator is Reading Low
08/16/2022
U2 Crossover Dump Valve Will Not Reliably Seat
04/08/2023
2OS-4-DV Not Tested
01/11/2024
D-501 Cells Are Not Within 5 Degrees
01/17/2024
2OS-4-DV Test/Troubleshoot for 2R40
01/23/2024
D-501 125V Station Battery is Reach Its End of Life
2/09/2024
PCR 2087546
(S) RMP 9216-2A - Service Water Pump Removal,
Installation
10/31/2015
PCR 2090218
(P) RMP 9216-2A - Service Water Pump Removal,
Installation
11/10/2015
Corrective Action
Documents
RWT 2065016
Pump Disch Expansion Joint Insps May be Inadequate
08/05/2015
71111.21N.04
Corrective Action
24 NRC ARD Missing Insulation Lagging on SW Pipe
04/30/2024
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
24 ARD Inspection G-05 Axial Compressor Oil Leak
04/30/2024
24 NRC ARD Start and Run Hour Meters Not Working
On HX-38A
05/02/2024
24 NRC ARD - WO Record Missing Sign-offs
05/03/2024
24 NRC ARD - XJ-2974A, P-32A Expansion Joint,
Showing Sign
05/03/2024
24 NRC ARD Inspection - Incorrect G-501 Voltage
Documented
05/06/2024
24 NRC ARD - Power Strip Within Cabinet C-120A and
C-121
05/06/2024
24 NRC ARD - D-501 Past Procedure Performance
Issue
05/06/2024
Work Order Closeout Quality
05/07/2024
24 NRC ARD - Missing Signature in WO Record
05/15/2024
24 NRC ARD - Condition Reports not Submitted for
Corrosion
05/15/2024
24 ARD - NRC Observation - Worker Practices,
Reviews
05/15/2024
Documents
Resulting from
Inspection
24 NRC ARD - Fan Bearing Greasing - Critical Step
05/17/2024
499B466 Sh.
2B
Elementary Wiring Diagram Cable Spreading Room
Recirculation Fan W-13A2
Drawings
M-144 Sh. 2
Heating & Ventilation Temperature Control P&ID
Temperature Control
Engineering
Changes
294538
1/2 RE-229 and RE-230 Fuse Replacement
Auxiliary Building and Control Building HVAC
FPTE 2016-003
NFPA 805 Nuclear Safety Capability Assessment
LR-AMP-004-
PSPM
Periodic Surveillance and Preventive Maintenance
Program for License Renewal
LR-AMP-010-FP
Fire Protection Program Basis Document for License
Renewal
LR-AMP-014-
CCMON
Cable Conditioning Monitoring Program for License
Renew
Miscellaneous
LR-AMP-019-
Tank Internal Inspection Program Basis Document for
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
TNKINT
PB-EPU-09-1168
Transmittal of Siemens Report for EC-08109
05/19/2009
VTM 00277
25 V DC Station Batteries
VTM 01105 Book
0-SOP-VNCSR-
2
Cable Spreading Room Ventilation System Normal
Operation
2-PT-MS-003
Crossover Steam Dump
IT 72
Service Water Valves (Quarterly)
LM 2.1
Lubrication Manual
MI 32.14
Visual Inspection for License Renewal
PC 10 Part 3
SW to SFP MOVs and Radwaste System AOVs Leak
Check
PC 29
Gas Turbine and Auxiliary Diesel Load Test
Procedures
RMP 9216-2A
Service Water Pump Removal, Installation, and
Maintenance
238021-01
Replace Expansion Joint
11/28/2001
40073979-01
Inspect and Maintain Pump
09/10/2012
40103522
P-032A Replace Pump per EC272153
10/17/2017
291866-01
T-073 Open and Inspect Accumulator Tank
08/12/2014
299630
VNCSR-Damper Blade Seal Cleaning
09/22/2014
40384004
Damper Operability
2/10/2016
40419943-01
T-073 Open and Inspect Accumulator Tank
08/18/2016
40583160
D-501 Quarterly GT125V Battery Inspection
01/23/2019
40614733
IT-72, Service Water Valves
06/10/2019
40616169
D-501 Annual GT125V Battery Inspection
05/22/2019
40630621
IT-72, Service Water Valves
08/20/2019
40643260-01
D-501 Quarterly GT125V Battery Inspection
10/23/2019
40746007
W-13A1 Troubleshoot Fan Not Starting
03/12/2021
40752947-05
1RPI/Engineering CHAR Data Evaluation
04/18/2022
40766773
HX-038A Inspect and Maintain AC Unit
05/16/2022
40767675
W-013A1-M Perform MCE Test
08/25/2022
Work Orders
40767676
AC Induction Motor MCE Testing Procedure
08/25/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
40770266
Perform UT Thickness Exam in Accordance with NDE-104
for License Renewal Program
03/27/2021
40775544-01
F-222/Perform Internal Inspection of Strainer
2/15/2022
40785442
HX-038A3/A4 Operations PMT/RTS
01/31/2022
40795162
RE-229/229B Calibration
06/28/2022
40796864-01
T-073 Open and Inspect Accumulator Tank
08/08/2022
40800611-01
F-215/Perform Internal Inspection of Strainer
08/24/2022
40801515
2-OS-00004-DV Overhaul to Replace Disc Rings and
Seals
04/10/2023
40813762-01
2RE-229 Not Going to Fail EX with No Flow
2/21/2022
40846323
G-05 Gas Turbine Generator Load Testing
05/26/2023
40856206
W-013A1 Inspect Fan and Lube Bearings
08/28/2023
40876035
HPIP 7.51.8 - Quarterly Functional Test of RMS
01/30/2024
40878262-01
F-222/Perform Internal Inspection of Strainer
2/13/2024
40884372-01
HPIP 7.51.10 Functional Test of the Radiation Monitoring
System
03/24/2024
40887679-01
2-PT-MS-003 U2 Crossover Steam Dump Test
01/11/2024
40964815
HPIP 7.51 Monthly RMS Operational Test HPIP 7.51
04/07/2024