IR 05000346/2021011
| ML21301A162 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 11/01/2021 |
| From: | Karla Stoedter NRC/RGN-III/DRS/EB2 |
| To: | Tony Brown Energy Harbor Nuclear Corp |
| References | |
| IR 2021011 | |
| Download: ML21301A162 (14) | |
Text
SUBJECT:
DAVIS-BESSE NUCLEAR POWER STATION - DESIGN BASIS ASSURANCE INSPECTION (TEAMS) INSPECTION REPORT 05000346/2021011
Dear Mr. Brown:
On October 21, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Davis-Besse Nuclear Power 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.
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, Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Docket No. 05000346 License No. NPF-3
Enclosure:
As stated
Inspection Report
Docket Number:
05000346
License Number:
Report Number:
Enterprise Identifier:
I-2021-011-0039
Licensee:
Energy Harbor Nuclear Corp.
Facility:
Davis-Besse Nuclear Power Station
Location:
Oak Harbor, OH
Inspection Dates:
October 04, 2021 to October 21, 2021
Inspectors:
C. Bickett, Senior Reactor Inspector
J. Corujo-Sandin, Senior Reactor Inspector
B. Daley, Senior Reactor Inspector
C. Hobbs, Reactor Inspector
G. O'Dwyer, Reactor Engineer
E. Sanchez Santiago, Senior Reactor Inspector
Approved By:
Karla K. Stoedter, Chief
Engineering Branch 2
Division of Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a design basis assurance inspection (teams) inspection at Davis-Besse Nuclear Power 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.
Starting on March 20, 2020, in response to the National Emergency declared by the President of the United States on the public health risks of the coronavirus (COVID-19), inspectors were directed to begin telework. In addition, regional baseline inspections were evaluated to determine if all or a portion of the objectives and requirements stated in the IP could be performed remotely. If the inspections could be performed remotely, they were conducted per the applicable IP. In some cases, portions of an IP were completed remotely and on site. The inspections documented below met the objectives and requirements for completion of the IP.
REACTOR SAFETY
===71111.21M - Design Bases Assurance Inspection (Teams) The inspectors evaluated the following components and listed applicable attributes, permanent modifications, and operating experience:
Design Review - Risk-Significant/Low Design Margin Components (IP Section 02.02)
=
- (1) D1_ED - 125/250 VDC Motor Control Center
1. Updated Safety Analysis Report/Technical Specification/Technical
Requirements Manual Licensing Basis Requirements
2. Component Walkdown
3. Operating Procedures
4. Maintenance Effectiveness
5. Translation of Vendor Specifications
6. Electrical Design Calculations and Considerations:
a.
Short Circuit Calculations b.
Motor Control Center Capacity c.
Degraded Voltage d.
Overcurrent Protection e.
Coordination Calculations
- (2) DH12 - Reactor Coolant System to Decay Heat System Isolation Valve
1. Updated Safety Analysis Report/Technical Specification/Technical
Requirements Manual Licensing Basis Requirements
2. System Walkdown
3. Operating Procedures
4. Maintenance Effectiveness
5. System Health
6. Translation of Vendor Specifications
7. Environmental Qualification
8. Protection Against External Events:
a.
Seismic b.
Fire
9. Mechanical Design:
a.
Weak Link Analysis b.
Required Thrust c.
Pressure Locking and/or Thermal Binding d.
Closure/Opening Time e.
Maximum Differential Pressure 10. Test/Inspection Procedures, Acceptance Criteria, and Recent Results:
a.
Leakage b.
In-service Testing c.
Technical Specification Required Surveillance d.
Actuation Test 11. Motor Power Requirements:
a.
Voltage Drop b.
Control Logic c.
Control Voltage Drop d.
Load Flow e.
Thermal Overload f.
Required Minimum Voltage g.
Degraded Voltage Effects h.
Brake Horsepower i.
Motor Thermal Overload Protection j.
Cable Ampacity k.
Protective Devices l.
Emergency Power
- (3) DB1CP - Battery Charger
1. Updated Safety Analysis Report/Technical Specification/Technical
Requirements Manual Licensing Basis Requirements
2. Component Walkdown
3. Operating Procedures
4. System Health
5. Translation of Vendor Specifications
6. Electrical Design Calculations and Considerations:
a.
Sizing b.
Current Limiting Setting c.
Duty Cycle d.
Contribution to Short Circuit Fault Current e.
Sizing of Protective Fuses/Breakers/Relays f.
Voltage Drop Calculation
- (4) Bus D1 - 4160V Switchgear
1. Updated Safety Analysis Report/Technical Specification/Technical
Requirements Manual Licensing Basis Requirements
2. Component Walkdown
3. Operating Procedures
4. Maintenance Effectiveness
5. System Health
6. Translation of Vendor Specifications
7. Environmental Qualification
8. Protection Against External Events:
a.
Flooding b.
Seismic c.
HELB d.
Fire
9. Test/Inspection Procedures, Acceptance Criteria, and Recent Results:
a.
Load Testing b.
Technical Specification Surveillance c.
Relay Calibration d.
Terminal Corrosion Resistance 10. Electrical Design Calculations and Considerations:
a.
Loading Calculations b.
Short Circuit Calculations c.
Voltage Regulation d.
Coordination Calculations e.
Temperature Effects and Equipment Qualification f.
Degraded Voltage Protection g.
Loss of Voltage h.
Breaker Settings and Ratings to Prevent Spurious Tripping i.
Breaker Control Voltage j.
Breaker Control Logic k.
Harmonic Content l.
Transmission System Protection m. Fast Bus Transfer Scheme n.
Surge Protection o.
Cable Ampacity p.
Protective Relays and Trip Setpoints
Design Review - Large Early Release Frequency (LERFs) (IP Section 02.02) (1 Sample)
- (1) T10 - Borated Water Storage Tank
1. Updated Final Safety Analysis Report/ Technical Specifications/ Technical
Requirements Manual
2. Component Walkdown
3. Operating Procedures
4. System Health
5. Protection against Seismic Events
6. Mechanical Design Calculations and Considerations:
a.
Available and Required Volume (Loss of Coolant Accident)b.
Level Setpoints c.
Instrument Uncertainty
7. Test/Inspection Procedures, Acceptance Criteria and Recent Results:
a.
Instrument Setpoints b.
Technical Specification Surveillances c.
Aging Management Program
Modification Review - Permanent Mods (IP Section 02.03) (5 Samples)
- (2) EC 15-138-002, Target Rock Auxiliary Power Supply Isolation
- (3) EC 16-050-001, Station Blackout Generator Radiator Tube Bundle Replacement
- (4) EC 16-478-002, Loop Seal in Borated Water Storage Tank to Spent Fuel Pool Purification Supply Pipe
- (5) EC 18-236-001, Replacement Breaker for BE1168
Review of Operating Experience Issues (IP Section 02.06) (2 Samples)
- (1) Information Notice (IN) 2015-05, Inoperability of Auxiliary and Emergency Feedwater Auto-start Circuits on Loss of Main Feedwater Pumps
- (2) IN 2017-06, Battery and Battery Charger Short-circuit Current Contributions to a Fault on the Direct Current Distribution System
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On October 21, 2021, the inspectors presented the design basis assurance inspection (teams) inspection results to Terry Brown, Site Vice President and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
35.004
Borated Water Storage Tank
35.013
BWST Capacity Study
36.023
BWST Heater
C-EE-002.01-010
DC CALC - Battery and Charger Sizing, Short Circuit, and
Voltage Drop
C-EE-002.01-011
Low Voltage Coordination Calculation
C-EE-004.01-049
4.16 kV Bus C1/D1 Degraded Voltage, Loss of Voltage, and
27X-6 Relay Setpoints
C-EE-015.03-008
AC Power System Analysis
C-FC-013.10-018
NFPA 805 Safe Shutdown, Non-Power Operation, and Fire
PRA Cable Selection Calculation
C-ICE-048.01-
004
SFAS BWST Low Level Setpoint
C-ME-049-02-110
Maximum Differential Pressure Across DH11 and DH12
C-ME-049.01-130
BWST Purification Hydraulic Model
C-ME-099.16-006
Recalculate Thrust Torque Capability for MOVs CFIA, CFIB,
DH11, and DH12
C-ME-099.16-006
Rev. 1 Add 1
Clearly Establish Calculation Addendum's Informational Use
01/24/2008
C-ME-49.01-078
Tank Level Curve Calculation - Borated Water Storage Tank
(T-10)
C-NSA-028.01-
004
Hazard to Control Room Operators from Materials Stored
Onsite
C-NSA-049.01-
004
Vortex Formation with ECCS Pump Suction from BWST
06/04/1997
C-NSA-049.01-
004
Determination of Analytical Limit for Borated Water Storage
Tank Transfer Permissive
C-NSA-049.01-
004
Vortex Formation with ECCS Pump Suction from the BWST
C-NSA-049.02-
048
LPI, CS, and HPI Pump NPSH with Suction from the BWST
Calculations
C-NSA-049.02-
LPI, CS, and HPI Pump NPSH with Suction from the BWST
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
048 Addendum 1
C-NSA-049.02-
048 Addendum 2
LPI, CS, and HPI Pump NPSH with Suction from the BWST
VA04-B001-001
Borated Storage Tank Foundation
03-04356
RFA-CR for Additional Shielding at BWST
06/04/2003
04-04502
RFA Annual Engineering Evaluation of Installed Shielding
(DB-HP-04027, Step 5.2)
7/12/2004
CR-2015-01817
NRC CDBI 2015 - Operability of BWST while on SFP
Purification
2/11/2015
CR-2015-02476
NRC CDBI 2015 - EDG Powering Nonessential 4160V Bus
2/26/2015
CR-2016-04735
19R BACC - Packing Leak Found on DH12
04/06/2016
CR-2017-01853
Paint Degraded on BWST DB-T10
2/20/2017
CR-2018-00607
T10 BWST Tank 1-1 Coating Deteriorated
01/23/2018
CR-2018-02257
20R BACC - Packing Leak Found on DH12
03/10/2018
CR-2018-07962
Relays 27A-3 and 27A-4 Found Unsat During Monthly
Surveillance
09/08/2018
CR-2018-08352
NRC DBAI 2018 - UFSAR Descriptions of SBODG Function
Are Inconsistent
09/21/2018
CR-2018-08578
NRC DBAI 2018 - Potential Deficiency Identified in
Procedure DB-OP-02511
09/28/2018
CR-2018-08883
DC Bus Ground Received During Restoration of FW6459,
MDFP Discharge to OTSG 1
10/09/2018
CR-2018-09725
D1 Under Voltage Relay as Found Condition Out of
Tolerance
11/02/2018
CR-2018-10598
EFWF Camper HA 1350 Will Not Fully Close
2/03/2018
CR-2019-00687
D1 Under Voltage Relay as Found Condition Out of
Tolerance
01/23/2019
CR-2019-08598
BACC Leak on 46-HSC-155-1 Shop Weld C on ECCS 1
Sump Pump Discharge
10/18/2019
CR-2020-01949
1R21 BACC: Packing Leak on DH12
03/08/2020
CR-2021-01130
D1 Under Voltage Relay 27A-4 Out of Calibration
2/19/2021
CR-2021-01131
D1 Under Voltage Relay 27A-2 Out of Calibration
2/19/2021
Corrective Action
Documents
CR-2021-05590
BACC New Leak on 1 ECCS Rm Sump Pump Piping
07/22/2021
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
CR 2021-07171
Part 21 Equalize Circuit of AMETEK Battery Chargers
09/24/2021
CR-2021-07352
Updated Calculated DC Short Circuit Current in Calculation
C-EE-002.01-010 Exceeds Short Circuit Ratings for 125VDC
Distribution Panel DAP
10/01/2021
CR-2021-07458
NRC DBAI 2021 - Clarification of Result and Conclusions
Summary in C-EE-002.01-010
10/06/2021
CR-2021-07464
HV5336B (EDG2 Room HVAC Recirc Damper Hydramotor
Position Indicator Labels Incorrectly Depict "Open" and
"Shut"
10/06/2021
CR-2021-07512
NRC DBAI 2021 - Excessive Grease Identified on 1P Battery
Connector
10/08/2021
CR-2021-07515
NRC DBAI 2021 - Clarification of Output Documents to
Calculation C-EE-004.01-049 (4.16 kV Bus C1/D1 Degraded
Voltage, Loss of Voltage, and 27X-6 Relay Setpoints)
10/08/2021
CR-2021-07710
NRC DBAI 2021 - Clarification of the Battery Charger
Description in SD-007
10/14/2021
CR-2021-07904
NRC DBAI 2021 - Error in Previous Revision 30 of
C-EE-002.01-010
10/20/2021
Corrective Action
Documents
Resulting from
Inspection
CR-2021-07914
NRC DBAI 2021 - Unable to Identify CRs Related to WO 200751566 and WO 200679064 Regarding Instrument o
As-Found Out of Tolerance
10/20/2021
E-1
Electrical System One-Line Diagram, Sheet 1
E-1
Electrical System One-Line Diagram, Sheet 2
E-3
4.16 kV Metering and Relaying One-Line Diagram
E-4
480 V Unit Sub-Station Lighting Distribution One-Line
Diagram, Sheet 4
E-6
480 V MCC (Essential) One-Line Diagram, Sheet 1
E-7
250/125V DC and Instrumentation AC One Line Diagram
Drawings
P-35216-1
- 12 Forged Bolted Bonnet Nuclear Gate Valve
T3
15-00138-002
Target Rock Auxillary Power Supply Isolation
16-0050-001
Station Blackout Diesel Generator Radiator Tube Bundle
Replacement
ADL-13-195-016
Affected Documents List for ECP 13-195-016 Revision 3
Engineering
Changes
ECP 13-195-016
Engineering Change Package EFW Facility Air Intake
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Damper HA1350 Installation
ECP 16-0478-002
Loop Seal in BWST to SFP Purification Supply Pipe - Piping
and Mechanical
ECP-18-0236-001
Replacement of Breaker BE1168
11/06/2018
601189516
DB-EER: DB-OP-02511 SWP Restart Direction
10/01/2018
Engineering
Evaluations
B-0027
Limitorque Valve Actuator Temperature Related to High
Superheat Ambient Temperatures
10/18/1978
DB-ME3003-002
Station Battery Charger Test
DBRM-EMER-
1500A
Davis-Besse Emergency Action Level Basis Document
Davis-Besse Nuclear Power Station, Unit No. 1, Issuance of
Amendment, RE: Safety Features Actuation System
Instrumentation Setpoints and Surveillance Testing
Requirements (TAC No. MC3084)
08/09/2006
Davis-Besse Nuclear Power Station Unit No. 1, Issuance of
Amendment, RE: Measurement Uncertainty Recapture
06/30/2008
Davis-Besse Nuclear Power Station Component Design
Basis Inspection, NCV 2015-008-01, Vulnerability of EDG
Crosstie to a Non-Essential Bus
04/10/2015
OE 2015-0524
Evaluation of Information Notice 2015-05
05/20/2015
OE-2017-0561-1-
FA003
Operating Experience Review of IN 2017-06
11/28/2017
OPS-SYS-1213
Auxillary Feedwater Training Lesson Plan
RFA 99-0271
BWST Shielding
09/07/1999
SD-007
System Description for 125/250V and 120V Instrumentation
SD-042
System Description for Decay Heat Removal System
SUS #048-01
System Monitoring Plan - SFAS
VMAN E-018Q-
00017
GNB Station Batteries
Miscellaneous
VMAN-E-855Q-
00001
Ametek Solidstate Controls Instruction/Technical Manual
DB-HP-01802
Control of Shielding
Procedures
DB-HP-04027
Installed Shielding Inspection
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
DB-ME3046-001
D1 Bus Undervoltage Units Monthly Functional Test
01/24/2020
DB-ME3051-001
D1 Bus Degraded Voltage Relay Calibration
03/15/2021
DB-ME3052-001
D1 Bus Loss of Voltage Relay Calibration
2/18/2019
DB-MM-09118
EDG Governor Removal, Installation, and Adjustment
DB-OP-02000
RPS, SFAS, SFRCS Trip or SG Tube Rupture
DB-OP-02000
RPS, SFAS, SFRCS Trip, or SG Tube Rupture
DB-OP-02003
ECCS Alarm Panel 3 Annunciators
DB-OP-02511
Loss of Service Water Pumps/Systems
DB-OP-03006
Miscellaneous Instrument Shift Checks
DB-OP-06015
Borated Water Storage Tank Operating Procedure
DB-OP-06261
Service Water System Operating Procedure
DB-OP-06901
Plant Startup
DB-SP-04457
External Surfaces Monitoring Inspections
DBBP-ESAF-
2008
Operation of the Drager Gas Detection Pump
NG-EN-00561
Above Ground Steel Tanks Inspection Program
NOP-CC-3002
Calculations
NOP-ER-3030
Surveillance Frequency Control Program
NOP-LP-2001
Corrective Action Program
NORM-OP-1009
SRO Review of Condition Reports
RA-EP-02850
Hazardous Chemical and Oil Spills
200817863
Performance of DB-PF-03272 Post Maintenance Valve Test
Completed 03/14/2020
03/14/2020
200229795
Replace Limit Switch for Valve DH12
01/20/2008
200634198
PM 9241 T10 Perform External Inspection
2/22/2017
200634813
PM 11756 T10 External Volumetric Inspection
10/20/2016
200638292
Auxillary Feed Pump 1-1 Discharge Control Valve Position
Controller
09/28/2019
200679064
M13148-001 08.000 LT1525D BWST LEVEL CAL
07/31/2018
200679882
Install Tornado Check Dampers in EFWF
05/19/2017
200688077
Clean, Inspect, and Test MVDH12, RCS to Decay Heat
System Isolation Valve Motor (DH12)
03/17/2018
Work Orders
200698909
M13147-001 08.000 LT1525C BWST LEVEL CAL
01/04/2019
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
200707583
T-10 Repair Coatings
2/20/2017
200712553
Month Fire Damper Inspection
05/13/2020
200740520
Inspection Indicates Tank T-10 has Loose Paint/Coating
01/23/2018
200746407
Fix Packing Leak Found on DH12
03/12/2020
200751566
MI3145-001 08.000 LT1525A BWST LEVEL CAL
07/16/2020
200756176
Performance of Test Procedure Decay Heat Removal
Isolation Test DB-SP-03130
03/09/2020
200774792
Replace LT1525C BWST Level SFAS CH 3
01/04/2019
200799975
SBODG Monthly Test
08/21/2021
200801860
SBODG Monthly Test
09/25/2021