IR 05000321/2022002
| ML22209A253 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 08/03/2022 |
| From: | Alan Blamey NRC/RGN-II |
| To: | Gayheart C Southern Nuclear Operating Co |
| References | |
| IR 2022002 | |
| Download: ML22209A253 (15) | |
Text
SUBJECT:
EDWIN I. HATCH - INTEGRATED INSPECTION REPORT 05000321/2022002 AND 05000366/2022002
Dear Ms. Gayheart:
On June 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Edwin I. Hatch. On July 25, 2022, the NRC inspectors discussed the results of this inspection with Johnny Weissinger 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, Alan J. Blamey, Chief Reactor Projects Branch 2 Division of Reactor Projects Docket Nos. 05000321 and 05000366 License Nos. DPR-57 and NPF-5
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000321 and 05000366
License Numbers:
Report Numbers:
05000321/2022002 and 05000366/2022002
Enterprise Identifier:
I-2022-002-0018
Licensee:
Southern Nuclear Operating Company, INC.
Facility:
Edwin I. Hatch
Location:
Baxley, GA
Inspection Dates:
April 01, 2022 to June 30, 2022
Inspectors:
R. Smith, Senior Resident Inspector
J. Hickman, Resident Inspector
Approved By:
Alan J. Blamey, Chief
Reactor Projects Branch 2
Division of Reactor Projects
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Edwin I. Hatch, 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
Unit 1 began the inspection period at 100 percent rated thermal power (RTP). On May 23, 2022, the operators shut down the unit to perform maintenance on the F safety relief valve (SRV).
The unit was restarted on May 25, 2022 and reached approximately 100 percent RTP on May 31, 2022. The unit operated there for the remainder of the inspection period.
Unit 2 began the inspection period at 100 percent RTP. On May 29, 2022, the operators reduced power to 65 percent RTP for a rod pattern adjustment and returned the unit to 100 percent RTP the same day. The unit operated there for the remainder 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 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.
REACTOR SAFETY
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 Summer Readiness for the following systems:
1. Plant service water (PSW) on May 9, 2022.
2. Offsite and alternate alternating current (AC) power systems on
May 11, 2022.
71111.04 - Equipment Alignment
Partial Walkdown Sample (IP Section 03.01) (4 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) Unit 1 A emergency diesel generator (EDG) system following testing, using 34SO-R43-001-1, on April 5, 2022.
- (2) Unit 1 PSW system during 1A PSW pump replacement on April 26, 2022.
- (3) Unit 1 residual heat removal (RHR) system in a shutdown cooling alignment following reactor shutdown for the replacement of the F SRV pilot, using 34SO-E11-010-1, on May 24, 2022.
- (4) Unit 2 reactor core isolation cooling (RCIC) system during the outage of the high pressure coolant injection (HPCI) system, using 34SO-E51-001-2, on May 31, 2022.
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (6 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) Unit 1 and 2 EDG building on April 8, 2022
- (2) Unit 1 reactor building 158 and 164-foot elevations on April 27, 2022.
- (3) Control building 130-foot elevation on April 15, 2022.
- (4) Diverse and Flexible Coping Strategy (FLEX) storage building on April 21, 2022.
- (5) Unit 1 turbine building on April 29, 2022.
- (6) Unit 2 reactor building 130-foot elevation on May 17, 2022.
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) Safety related pull boxes PB1-AT and PB2-BU and evaluated cable submergence protection on May 12, 2022.
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 a plant shutdown, they observed power decrease by reducing reactor recirculation flow to minimum, inserting control rods to 20 percent RTP, followed by a main turbine trip, and the insertion of a manual reactor trip to complete the shutdown.
They then observed the operating crew establish a controlled cooldown rate within technical specification (TS) limits, for a Unit 1 maintenance outage, on May 22 and 23, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated License Operator Requalification Program scenario H-LT-AF-00114, CPE Design - Loss of CRD, RFPT Controller Malfunction, Loss of Iso-Phase Bus Cooling, Loss of the 2A Drywell Chiller, Torus Leak (Isolation),
Loss of Feed Water Heating, HPCI Steam Leak, Emergency Depressurization, on April 13, 2022.
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) Unit 1 and 2 EDG fuel oil transfer system Y52 due to maintenance rule condition monitoring events being exceeded, on May 20, 2022.
- (2) Unit 2 C EDG for being greater than 75-percent of the allowed unavailability time, resulting in the EDG being near 10CFR50.65 (a)(1) status, on May 27, 2022.
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (5 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) Unit 1 elevated risk due to the surveillance of low voltage switchyard fixed water spray systems for the E startup auxiliary transformer, on May 12, 2022.
- (2) Unit 1 elevated risk due to division 2 RHR outage, from May 17 through 19, 2022.
- (3) Unit 1 elevated risk during unit shutdown to replace the F SRV pilot, on May 23, 2022.
- (4) Unit 2 elevated risk due to the HPCI system maintenance outage, June 1, 2022.
- (5) Unit 1 elevated risk due to division 2 core spray (CS) system outage, from June 28 through 30, 2022.
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) Condition report (CR) 10874075. Unit 1 A PSW pump with a degraded seismic restraint.
- (2) CR 10874078. Three
- (3) out of 16 bolts for Unit 1 A PSW pump bowl found outside of torque specification.
- (3) CR 10878586, Unit 1 A EDG battery charger not operating properly.
- (4) CR 10880391. Unit 2 division 1 of residual heat removal service water (RHRSW)piping identified with a localized point below calculated minimum pipe wall thickness.
- (5) CR 10857368. Unit 1 reactor building to outside differential pressure unexpected decrease caused by blocking open secondary containment doors.
- (6) Correction action reports (CARs) 304318, 309195, 309199. Unit 1 A PSW pump motor excessive vibration.
71111.18 - Plant Modifications
Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples)
The inspectors evaluated the following temporary or permanent modifications:
- (1) Isolation of cable SGX708C03 (associated with Unit 2 main disconnect circuit), on both ends, to support troubleshooting and repair.
- (2) Removal of Unit 2 PSW valve 2P41R606 internals to restore PSW flow to the hydrogen and isophase bus coolers.
71111.19 - Post-Maintenance Testing
Post-Maintenance Test Sample (IP Section 03.01) (5 Samples)
The inspectors evaluated the following post-maintenance testing activities to verify system operability and/or functionality:
(1)34SV-P41-001-1, Plant Service Water Pump Operability, following the replacement of the Unit 1 A PSW motor, on April 9 through 10, 2022.
(2)34SV-P41-001-2, Plant Service Water Pump Operability, following repairs of the Unit 2 A PSW pump overload and lockout relay circuit, on May 13, 2022.
(3)34SV-E11-002-1, Residual Heat Removal Valve Operability, following breaker modifications and motor operator valve testing, on May 18 through 20, 2022.
(4)34SV-E41-001-2, HPCI Valve Operability, and 34SV-E41-002-2, HPCI Pump Operability, following planned system outage, on June 2 through 3, 2022.
- (5) SNC1198858, 2T1B004B - RCIC Pump Room Cooler Unit, pressure test following vendor coating of the room cooler to repair tube sheet and tube leaks, on June 13, 2022.
71111.20 - Refueling and Other Outage Activities
Refueling/Other Outage Sample (IP Section 03.01) (1 Sample)
- (1) The inspectors evaluated Unit 1 maintenance outage activities due to pilot valve leakage on the F SRV, from May 22 through May 25.
71111.22 - Surveillance Testing
The inspectors evaluated the following surveillance testing activities to verify system operability and/or functionality:
Surveillance Tests (other) (IP Section 03.01) (4 Samples)
(1)34SV-R43-001-1, Diesel Generator 1A Monthly Test, Version 25.5, on April 4, 2022.
(2)34IT-OPS-003-0, Security and Dry Storage Power Systems Test, Version 13.2, on April 13, 2022.
(3)34SV-C41-002-1, Standby Liquid Control Pump Operability Test, Version 19.0, on May 4, 2022.
(4)52SV-FPX-005-0, Surveillance of Low Voltage Switchyard Fixed Water Spray Systems for the 1E Startup Auxiliary Transformer, Version 1.0, on May 12, 2022.
Inservice Testing (IP Section 03.01) (1 Sample)
(1)34SV-R43-013-2, Diesel Generator 2C 24-Month Operability Test, Version 7.1, on April 27, 2022.
71114.06 - Drill Evaluation
Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)
The inspectors evaluated:
- (1) Licensed reactor operators respond to a HPCI steam line break in the simulator and the inspectors observed the crew make an emergency declaration and notification. This represented a drill and exercise performance (DEP) opportunity on April 6,
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, 2021, to March 31, 2022)
- (2) Unit 2 (April 1, 2021, to March 31, 2022)
BI02: RCS Leak Rate Sample (IP Section 02.11) (2 Samples)
- (1) Unit 1 (April 1, 2021, to March 31, 2022)
- (2) Unit 2 (April 1, 2021, to March 31, 2022)
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On July 25, 2022, the inspectors presented the integrated inspection results to Johnny Weissinger and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Miscellaneous
NMP-GM-025
Site Certification for Summer Readiness
05/06/2022
Operation with Degraded System Voltage
6.1
Procedures
NMP-OS-020
Station Response to Southern Company Alert Conditions
2.0
Condition Reports
(CR)
10813290, 10815976, 10827151, 10827885, 10828039,
10831205, 10833407, 10833509, 10833891, 10846610,
10836882, 10837465, 10837670, 10837928, 10843730,
10847419, 10847477, 10847703, 10847900, 10848137,
10855461, 10855651, 10856494, 10856598, 10857690,
10857760, 10858219, 10858261, 10858594, 10858625,
10860294, 10860715, 10860825, 10863976, 10864200,
10865105, 10867159, 10867171
Corrective Action
Documents
Condition Reports
(CR)
10772157, 10772419, 10772431, 10773100, 10773182,
10773184, 10773973, 10774127, 10775453, 10776146,
10776824, 10776921, 10776967, 10777735, 10777750,
10777998, 10779485, 10780688, 10780774, 10781771,
10782366, 10782719, 10783605, 10783705, 10783757,
10783847, 10785204, 10787291, 10787842, 10787845,
10787846, 10788499, 10792231, 10797623, 10797740,
10802238, 10825262, 10825300, 10825444, 10826822
Drawings
H-26023 and H-
26024
RCIC System P&ID Sheets 1 and 2
44.0/33.0
Engineering
Evaluations
Technical
Evaluation (TE)
1083597
Residual Heat Removal System
Ver. 46.1
Reactor Core Isolation Cooing (RCIC) System
28.4
Procedures
Diesel Generator Standby AC System
29.4
Work Orders
Work Orders
(SNC)
1033618, 1122157, 1144460
Corrective Action
Documents
Condition Reports
(CR)
10872492, 10872493, 10872495, 10872496, 10872502
Corrective Action
Documents
Condition Reports
(CR)
10872504, 10876828, 10876857, 10876859, 10876860,
10876861, 10876884, 10876885, 10876886
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Resulting from
Inspection
NMP-ES-035-
019-GL02-F02
Control Building 130' Elevation
1.0
NMP-ES-035-
019-GL02-F06
Diesel Generator Building
1.0
NMP-ES-035-
019-GL02-F10
Unit 1 Turbine Building 147' Elevation
1.0
NMP-ES-035-
019-GL02-F121
FLEX Storage Building
1.0
NMP-ES-035-
019-GL02-F14
U1 Reactor Building EL 158/164
1.0
Fire Plans
NMP-ES-035-
019-GL02-F30
Unit 2 Reactor Building 130-Foot Elevation
1.0
Procedures
Underground Pullbox Debris Removal / Inspection
10.3
Work Orders
SNC1050537
Inspect Inground Pull Boxes
05/12/2022
Miscellaneous
LT-AF-00114
CPE Design-Loss of CRD, RFPT Controller Malfunction,
Loss of Iso-Phase Bus Cooling, Loss of the 2A Drywell
Chiller, Torus Leak (Isolation), Loss of Feed Water Heating,
HPCI Steam Leak, Emergency Depressurization
1.0
Condition Action
Reports (CAR)
277887, 278347
Corrective Action
Documents
Condition Reports
(CR)
10878810, 10701368, 10739096, 10872526, 10652503,
10667619, 10667792, 10676535, 10676906, 10677240,
10695910, 10696214, 10701368, 10701469, 10703008,
10703710, 10704348, 10705447, 10705879, 10707845,
10709151, 10710050, 10710051, 10710066, 10710204,
10711446, 10715762, 10720909, 10728437, 10728527,
10728620, 10731630, 10731822, 10731823, 10737213,
10737304, 10737767, 10737768, 10739096, 10739274,
10739608, 10740926, 10742383, 10747548, 10747703,
10748007, 10748522, 10749416, 10749675, 10750309,
10750330, 10751399, 10751790, 10753706, 10765811,
10770340, 10773811, 10777592, 10781434, 10788308,
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
10788382, 10788395, 10789017, 10791717, 10797494,
10797497, 10801285, 10803578, 10807374, 10808303,
10811406, 10811997, 10812018, 10815558, 10819132,
10844810, 10845027, 10845488, 10845787, 10845992,
10850496, 10851307, 10851327, 10852900, 10856928,
10872526, 10874221, 10875726
Miscellaneous
EVAl-H-Y52-
05529
EDG Fuel Oil Supply
05/17/2022
Work Orders
Work Orders
(WO-SNC)
1118161, 1124246, 1124606, 1069606,
Hatch U1 R8 On-Line Configuration Risk Monitor Current
Risk Summary Report
05/17/2022
Hatch U1 R8 On-Line Configuration Risk Monitor Current
Risk Summary Report
06/28/2022
Miscellaneous
Hatch U1 R8 On-Line Configuration Risk Monitor Current
Risk Summary Report
06/29/2022
Surveillance of Low Voltage Switchyard Fixed Water Spray
Systems
1.0
Procedures
NMP-OS-010-002
Hatch Protected Equipment Logs
11.1
SCNH-21-009
U1 Plant Service Water (PSW) Pumps and Restraints
Seismic Analysis
1.0
SCNH-22-001
RHRSW Pumps With Degraded Seismic Restraint
1.0
Calculations
SNCH-90-079
Review of PSW Pump Seismic Analysis Report
0.0
Condition Report
(CR)
10165289, 10872801. 10857368, 10873389, 10873390,
10874075, 10857430
Corrective Action
Documents
Corrective Action
Reports (CAR)
304318, 309195, 309199
Engineering
Evaluations
Technical
Evaluation (TE)
1103319
Miscellaneous
SNC Hatch Plant Service Water Pumps Upgrade
Presentation by Hydro
Secondary Containment Alignment
7.5
Unit 1 RHRSW Pump and Motor Maintenance
9.9
Procedures
Unit 1 Plant Service Water Pump & Motor Major
10.1
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Inspection/Overhaul
NMP-AD-003
Equipment clearance and Tagging
28.1
Work Orders
Work Orders
(WO-SNC)
1179371
Corrective Action
Documents
Condition Reports
(CR)
10780104, 10780120, 10780269, 10781097, 10850917,
10781093
H-23443
Wiring Diagram - Station Service Transformer 2BB Relay
Panel: 2H11-P680 and Generator No. 2Relay Panel 2H11-
P670
17.0
Drawings
H-53115
500KV NBM #179756 Elementary & Wiring Diagram
2.0
Design
Equivalent
Change Package
SNC 1151803
TCC to remove 2P41F365 Internals
04/10/2021
Engineering
Changes
NMP-ES-095-
003-F01
Engineering Change Worksheet for SNC1146831TCC001
1.0
NMP-AD-008-F01
Applicability Determination for SNC1146831
13.2
NMP-AD-010-F01
CFR 50.59 Screening for SNC1146831
10.3
NMP-ES-035-
006-F05
Fire Protection Program Impact Screening for
SNC1146831TCC
6.0
Engineering
Evaluations
Technical
Evaluation (TE)
1084335
Procedures
NMP-ES-095-002
Temporary Configuration Change Process
2.0
SNC1151601
Replace of Rebuild 2P41F365 MOV isolation valve for the
Plant Service Water
04/10/2021
Work Orders
Work Orders
(WO-SNC)
SNC146831, SNC1144553, SNC1146190, SNC1181071
Corrective Action
Documents
Condition Report
(CR)
10872678
Residual Heat Removal System
46.1
RHR "B" Loop Valve Operability
21.6
HPCI Valve Operability
13.7
HPCI Pump Operability
39.2
Procedures
Plant Service Water Pump Operability
15.2
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Plant Service Water Pump Operability
16.3
Cooling Coil Cleaning
6.3
SNC1326397
Trouble Shooting of U2 PSW Pump 2A OVLD/Lockout relay
Trip
05/13/2022
Work Order
(WO-SNC)
SNC1198858
06/13/2022
Work Order (WO-
SNC)
SNC426594
Work Orders
Work Orders (WO
SNC)
1014024, 1014012, 1014014
Normal Plant Shutdown
2.6
NMP-GM-009-
F01
Restart PRB review Checklist (PRB # 2022-016)
7.0
Procedures
NMP-RE-008-F02
Simplified Reactivity Management Plan (RMP Title - Hatch -
Unit 1 Cycle 31 - MOC Shutdown for SRV Repair)
2.1
Condition Report
(CR)
10873785
Condition Report
(CR)
10873631
Condition Report
(CR)
10873701
Condition Reports
(CR)
10777666, 10782701, 10793492, 10793494, 10795758,
10808538, 10815466, 10820223, 10821061, 10823905,
10825430, 10829858, 10830677, 10836987, 10845277,
10845750, 10855236, 10855329, 10859928, 10861201,
10861202, 10862061, 10873540
Corrective Action
Documents
Condition Reports
(CR)
10879946, 10879964
Corrective Action
Documents
Resulting from
Inspection
Condition Report
(CR)
10873880, 10876581,10878631, 10873911
Security and Dry Storage Power Systems Test
13.2
Procedures
Standby Liquid Control Pump Operability Test
19.0
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Diesel Generator 1A Monthly Test
25.5
Diesel Generator 2C 24 Month Operability Test (IST)
7.1
Breaker Alignment Checks
10.4
Emergency Preparedness Observation Form - LOCT DEP
Observation
04/06/2022
Miscellaneous
H-LT-AF-00114
CPE Design - Loss of CRD, RFPT Controller Malfunction,
Loss of Iso-Phase Bus Cooling, Loss of the 2A Drywell
Chiller, Torus Leak (Isolation), Loss of Feed Water Heating,
HPCI Steam Leak, Emergency Depressurization.
1.0
Miscellaneous
ESOM Logs for Unit 1 and Unit 2 Containment/Drywell
Leakage from April 1, 2021 to March 31, 2022
71151
Procedures
Reactor Coolant Weekly (Reactor Coolant Sample Data for
Unit 1 and Unit 2 - April 1, 2022 to March 31, 2022)