IR 05000266/2022011
| ML22215A068 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 08/03/2022 |
| From: | Richard Skokowski Engineering Branch 3 |
| To: | Strope M Point Beach |
| References | |
| IR 2022011 | |
| Download: ML22215A068 (11) | |
Text
SUBJECT:
POINT BEACH NUCLEAR PLANT - TRIENNIAL FIRE PROTECTION INSPECTION REPORT 05000266/2022011 AND 05000301/2022011
Dear Mr. Strope:
On June 22, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Point Beach Nuclear 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 safety 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 III; the Director, Office of Enforcement; and the NRC Resident Inspector at Point Beach Nuclear Plant.
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 III; and the NRC Resident Inspector at Point Beach Nuclear Plant.
August 3, 2022 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, Richard A. Skokowski, Chief Engineering Branch 3 Division of 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:
05000266/2022011 and 05000301/2022011
Enterprise Identifier:
I-2022-011-0035
Licensee:
NextEra Energy Point Beach, LLC
Facility:
Point Beach Nuclear Plant
Location:
Two Rivers, WI
Inspection Dates:
May 23, 2022 to June 22, 2022
Inspectors:
A. Dahbur, Senior Reactor Inspector
M. Domke, Reactor Inspector
A. Shaikh, Senior Reactor Inspector
Approved By:
Richard A. Skokowski, Chief
Engineering Branch 3
Division of Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a triennial fire protection 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 Evaluate the Impact of PORV Tailpipe Temperature on the New Cable Routing Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green NCV 05000266,05000301/2022011-01 Open/Closed
[H.6] - Design Margins 71111.21N.
The inspectors identified a finding of very low safety significance (Green) and a Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to evaluate the increased temperature impact of the Pressurizer Power Operated Relief Valve (PORV) tailpipe on the new cables routing. Specifically, Modification EC 292093 rerouted the power/control cables associated with the Unit 2 PORV and its associated block isolation valve in conduits through the same opening as the PORV tailpipe discharge line penetration. However, the licensee failed to evaluate for the increased local temperature that the cables would be subjected to when the PORV is open and the tailpipe temperature rises.
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.05 - Fire Protection Team Inspection (FPTI) Structures, Systems, and Components (SSCs) Credited for Fire Prevention, Detection, Suppression, or Post-Fire Safe Shutdown Review (IP Section 03.01)
The inspectors verified that components and/or systems will function as required to support the credited functions stated for each sample. Additional inspection considerations are located in the fire hazards analysis (FHA) or safe shutdown analysis (SSA).
- (1) Cable Spreading Room Fire Detectors, Dampers, and Suppression Systems
- (2) Emergency Diesel Generator Rooms, G01 and G02, Fire Detectors, Dampers, and Suppression Systems
- (3) Charging pumps and associated valves for inventory control
- (4) Fire Pumps and Associated Hydraulic Calculation
Fire Protection Program Administrative Controls (IP Section 03.02) (1 Sample)
The inspectors verified that the selected control or process is implemented in accordance with the licensees current licensing basis. If applicable, ensure that the licensees Fire Protection Program (FPP) contains adequate procedures to implement the selected administrative control. Verify that the selected administrative control meets the requirements of all committed industry standards.
(1)805 Monitoring Program
Fire Protection Program Changes/Modifications (IP Section 03.03) (1 Sample)
The inspectors verified the following:
a. Changes to the approved FPP do not constitute an adverse effect on the ability to safely shutdown.
b. The adequacy of the design modification, if applicable.
c. Assumptions and performance capability stated in the SSA have not been degraded through changes or modifications.
d. The FPP documents, such as the Updated Final Safety Analysis Report, fire protection report, FHA, and SSA were updated consistent with the FPP or design change.
e. Post-fire Safe Shutdown operating procedures, such as abnormal operating procedures, affected by the modification were updated.
- (1) EC292093, Reroute Unit 2 PORV/Block Valve Cables for Construction Truss
INSPECTION RESULTS
Failure to Evaluate the Impact of PORV Tailpipe Temperature on the New Cable Routing Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green NCV 05000266,05000301/2022011-01 Open/Closed
[H.6] - Design Margins 71111.21N.0 The inspectors identified a finding of very low safety significance (Green) and a Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to evaluate the increased temperature impact of the Pressurizer Power Operated Relief Valve (PORV) tailpipe on the new cables routing. Specifically, Modification EC 292093 rerouted the power/control cables associated with the Unit 2 PORV and its associated block isolation valve in conduits through the same opening as the PORV tailpipe discharge line penetration. However, the licensee failed to evaluate for the increased local temperature that the cables would be subjected to when the PORV is open and the tailpipe temperature rises.
Description:
License Amendment Request 278 discussed how PORV control and power cables were protected from a postulated falling object. However, the control and power cables for 2RC-431C, T-1 PZR power-operated relief, and 2RC-515, T-1 PZR RC-431C power-operated relief isolation, were routed through conduits 2V431, 2-515, and 2-431.
Portions of the cables were routed through areas of the 66 level of containment which were not protected from postulated falling objects. To resolve this issue, the licensee implemented Modification EC 292093 that rerouted the supply and control cables for both 2RC-515 and 2RC-431C from the Pressurizer Cubicle to tray 2VB05 via new conduits located on the 46 level of containment. The new conduits were routed through the same opening in the pressurizer cubicle wall as the PORV tailpipe discharge line penetration located on the 46 elevation.
During the inspectors review of EC 292093, the inspectors noticed that EC 292093 did not evaluate the increased temperature impact of the PORV tailpipe on the portion of the cables routed in the same penetration as the tailpipe when the PORV is open causing the tailpipe to heat-up. Based on the inspectors concern, the licensee entered this issue into their corrective action program as AR 02429445 and performed a preliminary evaluation for the maximum potential temperature that the cables may be subjected to because of the tailpipe temperature heat-up. The licensee was able to show that for the bounding event/accident, small Loss of Cooling Accident (LOCA), the maximum likely temperature that the tailpipe can reach was 340 degrees-Fahrenheit (F). This maximum tailpipe temperature was bounded by the enveloping test profile for these types of cables. The enveloping test profile used a LOCA test of 340 degrees-F. Therefore, the licensees preliminary evaluation reasonably determined that the new rerouted cables through the PORV tailpipe discharge line penetration would not become adversely affected by being located adjacent to the pressurizer exhaust piping.
Corrective Actions: The licensee took an immediate corrective action of performing a temperature analysis to determine that the cables in question would remain functional when the PORV is open and tailpipe temperature rises.
Corrective Action References: AR 02429445
Performance Assessment:
Performance Deficiency: The failure to evaluate the increased temperature impact of the PORV tailpipe on cables routed in the same penetration as the tailpipe was contrary to 10 CFR Part 50, Appendix B, Criterion III, Design Control, and was a performance deficiency.
Screening: The inspectors determined the performance deficiency was more than minor because it was associated with the Design Control 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 evaluate the increased temperature impact of the tailpipe on cables when the PORV is open did not ensure that it would not cause degradation of the cables and potentially result in the PORV remaining open.
Significance: The inspectors assessed the significance of the finding using IMC 0609 Appendix A, The Significance Determination Process (SDP) for Findings At-Power. Using Exhibit 2, Mitigating Systems Screening Questions, the finding screened as having very low safety significance (Green) because the finding did not represent a loss of operability or functionality and did not represent an actual loss of safety function of the system or train.
Specifically, in response to inspectors concern, the licensee performed a preliminary evaluation and reasonably determined that the cables would remain functional in the event of the PORV open causing the tailpipe to heat-up.
Cross-Cutting Aspect: H.6 - Design Margins: The organization operates and maintains equipment within design margins. Margins are carefully guarded and changed only through a systematic and rigorous process. Special attention is placed on maintaining fission product barriers, defense-in-depth, and safety related equipment. Specifically, the licensee failed to ensure that the new routing still maintained the design margins for the cable qualification.
Enforcement:
Violation: 10 CFR Part 50, Appendix B, Criterion III, Design Control, requires in part, that design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculational methods, or by the performance of a suitable testing program.
Contrary to the above, on April 03, 2020, the licensee failed to verify or check the adequacy of design of safety related cables associated with Unit 2 PORV by the performance of design review, the use of alternate or simplified calculational methods, or by the performance of a suitable testing program. Specifically, Modification EC 292093 failed to evaluate/verify that the increased temperature of the PORV tailpipe, when the PORV is open, would not impact the new routing of the control and power cables for the Unit 2 PORV 2RC-431C and its associated block isolation valve 2RC-515.
Enforcement Action: This violation is being treated as a non-cited violation, consistent with Section 2.3.2 of the Enforcement Policy.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On June 22, 2022, the inspectors presented the triennial fire protection inspection results to Michael Strope and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
2002-0003
Service Water System Design Basis
2017-0006
Water Based Suppression System Supply Calculations
2018-0016
Service Water Flow during NFPA 805 Fire Events
Calculations
WE-100069
Piping Analysis Stress Report, Subsystem 1KB1A, Fire
Protection Sprinkler System in Diesel Generator Room
(G01 Room)
Corrective Action
Documents
28020
Update FPTE 2016-007 & FPTE 2016-008
05/19/2022
29441
Inspect/Replace As Needed, FP Components Upstream of
YS-7305B
06/08/2022
Corrective Action
Documents
Resulting from
Inspection
29445
22 TFP Inspection EC 292093 Did Not Evaluate Cable
Routing Through Pressurizer Shield Wall
06/08/2022
30001260C
Sheets 1 - 6
Charging Pumps Control Schematic 125 (150) HP
499B466 Sheet
316B
Elementary Wiring Diagram - Charging Pump 1P-2A
684J741 Sheet 2
P&ID Chemical and Volume Control
M-109
Heating and Ventilation Turbine Building Area 3 Plans at
Elevation 44' & 60'
M-207 Sheet 1
PID Service Water Point Beach Nuclear Plant Unit 1
M-207 sheet 1A
PID Service Water Point Beach Nuclear Plant Unit 1
Drawings
M-208 Sheet 4
P&ID Fire Protection Sprinkler System Point Beach
Nuclear Plant Unit 1
285626
Halon System Upgrades for Reliability
2093
Reroute U2 PORV/Block Valve Cables for Construction
Truss
Engineering
Changes
Incorporate Reports 003 (Scoping) and 004 (Screening)
into FPTE 2016-007 and FPTE 2016-008
PRA 8.14
Fire PRA Main Control Room Abandonment MAAP Run
Notebook
Engineering
Evaluations
PRA 8.15
Fire PRA Post-Fire Human Reliability Analysis Notebook
71111.21N.05
Procedures
0-PT-FP-005
Annual Underground Fire Main Flow Test
08/18/2021
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Control Room Abandonment Due to Fire
Response to Fire in Cable Spreading Room Turbine Hall
FP-E-SE-04
System Engineering Walkdowns
NP 7.7.25
PBNP Renewed License Program
OM 3.27
Control of Fire Protection and NFPA 805 Equipment
384946-01
Fire Barrier Inspection per RMP 9057
06/09/2011
40374688-01
Fire Barrier Inspection per RMP 9057
2/11/2016
40488220-19
EC285626 Acceptance Testing
2/04/2017
40563059-12
YS-077305B Install Strainer and 4x2 1/2 Spool Piece
11/14/2017
40728194-13
PF-3742/Inspect Valve Internals
06/18/2020
40774454-01
TS-77, Smoke Detection System Integrity Test
2/18/2022
40780035-01
TS-78, Halon Fire Suppression Test
04/24/2022
Work Orders
40786083-01
TS-76, Automatic Sprinkler/Water Spray Surveillance Test
05/12/2022