IR 05000456/2020012

Design Basis Assurance Inspection (Programs) Inspection Report 05000456/2020012 and 05000457/2020012

ML20323A083
Person / Time
Site:	Braidwood
Issue date:	11/18/2020
From:	Karla Stoedter NRC/RGN-III/DRS/EB2
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
References
IR 2020012
Download: ML20323A083 (12)

Text

November 18, 2020

SUBJECT:

BRAIDWOOD GENERATING STATION - DESIGN BASIS ASSURANCE INSPECTION (PROGRAMS) INSPECTION REPORT 05000456/2020012 AND 05000457/2020012

Dear Mr. Hanson:

On October 23, 2020, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Braidwood Generating Station and discussed the results of this inspection with Mr. J. Keenan, 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,

/RA/

Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 05000456 and 05000457 License Nos. NPF-72 and NPF-77

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000456 and 05000457 License Numbers: NPF-72 and NPF-77 Report Numbers: 05000456/2020012 and 05000457/2020012 Enterprise Identifier: I-2020-012-0019 Licensee: Exelon Generation Company, LLC Facility: Braidwood Generating Station Location: Braceville, IL Inspection Dates: October 05, 2020 to October 23, 2020 Inspectors: J. Benjamin, Senior Reactor Inspector I. Hafeez, Reactor Inspector E. Sanchez Santiago, Senior Reactor Inspector Approved By: Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a design basis assurance inspection (programs) inspection at Braidwood Generating 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), regional inspectors were directed to begin telework. Regional based inspections were evaluated to determine if all or a portion of the objectives and requirements stated in the IP could be performed remotely. For the inspection documented below portions of the IP were completed remotely as well as on site and all the objectives and requirements for completion of the IP were met.

REACTOR SAFETY

71111.21N.02 - Design-Basis Capability of Power-Operated Valves Under 10 CFR 50.55a Requirements POV Review (IP Section 03)

The inspectors:

a.

Determined whether the sampled power operated valves (POVs) listed below are being tested and maintained in accordance with NRC regulations along with the licensees commitments and/or licensing bases.

b.

Determined whether the sampled POVs are capable of performing their design-basis functions.

c.

Determined whether testing of the sampled POVs is adequate to demonstrate the capability of the POVs to perform their safety functions under design-basis conditions.

d.

Evaluate maintenance activities including a walkdown of the sampled POVs (if accessible).

(1) 2RY455A, Pressurizer Power Operated Relief Valve

(2) 1MS001B, Steam Generator Main Steam Isolation Valve

(3) 1RH8716A, Residual Heat Removal Pump Discharge Crosstie Isolation Valve

(4) 1CC685, Component Cooling from Reactor Coolant Pumps Thermal Barrier Isolation Valve

(5) 1RH8701B, Reactor Coolant Loop 1A to Residual Heat Removal Pump 1A Isolation Valve

(6) 1SX007, Essential Service Water Supply Valve to Common Component Cooling Heat Exchanger

(7) 2SD002B, Steam Generator Blowdown Upper/Lower Isolation Valve

(8) 2RC014C, Reactor Head Vent Isolation Valve

(9) 1SI8801B, Charging to Cold Leg Injection Valve

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 23, 2020, the inspectors presented the design basis assurance inspection (programs) inspection results to Mr. J. Keenan, Site Vice President and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.21N.02 Calculations 10.2.117 Copes Vulcan Air Operated Control Valves Design Report 9

BRW-01-0153-E Environmental Parameters of EQ Zones 2

BRW-01-0153-E Environmental Parameters of EQ Zones 2

/BYR0l-068

BRW-95-059 Braidwood 1&2 CC System MOV Differential Pressure 1

Calculation

BRW-97-0821-M Safety Injection MOV Differential Pressure Calculation 0

BRW-98-0392-M Residual Heat Removal System (RHR) MOV Differential 0

Pressure Calculation

BRW-98-0596-E Generic Thermal Overload Heater Sizing Calculation for 12/05/1998

Motor Operated Valves

BRW-98-0718-E Motor Operated Valves (MOV) Actuator Motor Terminal 0

Voltage & Thermal Overload Sizing

Calculation - Component Cooling (CC) System

BRW-98-0721-E Motor Operated Valves (MOV) Actuator Motor Terminal 02/23/1999

Voltage and Thermal Overload Sizing Calculation-Residual

Heat Removal (RH) System

BRW-98-0723-E Motor Operated Valves Actuator Motor Terminal Voltage 0

and Thermal Overload Sizing Calculation

BRW-98-0724E Motor Operated Valve (MOV) Actuator Motor Terminal 0

Voltage and Thermal Overload Sizing Calculation-SX

System

CQD-012298 Review of Seismic Qualification Test Report for 1" Solenoid 0

Valves (1&2RC014A-F)

EMD-030608 Review of a Stress Analysis Report for a Valcor 1-inch 1

Solenoid Valve for Braidwood Station

ENC-QE-51.D Seismic Qualification Reevaluation of the Safety Injection 2

Motor Operated Valves

EQ-BB-027 Limitorque MOV Actuators Outside Containment 10

EQ-BB-047 Environmental Qualification of Borg Warner Valves 7

EQ-BB-084 Limitorque Motor Operators (RH Insulation) 6

EQ-GEN023 Environmental Qualification of Namco Control Limit Switch 15

Inspection Type Designation Description or Title Revision or

Procedure Date

Series

EQ-GEN023 Environmental Qualification of Namco Control Limit Switch 15A

Series

EQ-GEN040 Environmental Qualification of Valcor V526 Series Solenoid 7

Valves

EQDP-MECH Westinghouse - Environmental Qualification of Pumps and 11

Valves

F-2756 Main Steam Isolation Valves 1

Corrective Action 2479735 OSP-R Degraded Grease Conditions Noted in 1RH8701B 04/04/2015

Documents 2567440 OSP-A Valve Dual Indication When Open (2SD002D) 10/08/2015

4004530 OSP-P MLB 4 GRP3 12.2 2SD002F Status Light Not 04/30/2017

Working

4183361 OSP-R 2SI8801A Mechanical Grease Inspection Grade 3 10/14/2018

219454 Stem Adapter Replacement on 1SX005 02/12/2019

4304505 Leak off the 2SD002H Valve 12/17/2019

Corrective Action 4375109 NRC ID - POV Inspection W/D - 1SX005 10/07/2020

Documents 4378979 Braidwood DBAI Power Operated Valves - Observations 10/23/2020

Resulting from

Inspection

Drawings 2000003 Air Cylinder Assembly Spring Loaded Fail Closed 2 Inch C

Globe Valve

20E-1-4018A Relaying & Metering Diagram 4160V ESF Switchgear Bus X

141

20E-1-4019A Relaying & Metering Diagram 480V ESF Switchgear Bus K

131X

20E-1- Schematic Diagram CCW From Reactor Coolant Pumps N

4030CC04 Thermal Barrier Isolation Valves 1CC9438 & 1CC685

20E-1- Schematic Diagram Residual Heat Removal Heat 03/31/1978

4030EH06 Exchanger 1A & 1B Crosstie Valves 1RH8716A &

1RH8716B

20E-1- Schematic Diagram RC Loop 1A to RHR Pump Isolation Q

4030RH04 Valves 1RH8701A & RH88701B

20E-1-4030SI06 Schematic Diagram Boron Injection Tank Discharge L

Isolation Valves 1SI8801A & 1SI8801B

Inspection Type Designation Description or Title Revision or

Procedure Date

20E-1-4687D External Wiring Diagram 480V Auxiliary Building ESF MCC K

2X4 Section D

20E-1-4689A External Wiring Diagram 480V Auxiliary Building ESF MCC N

2X5 1AP32E

20E-1-4883 Internal-External Wiring Diagram Motor Operated Valves L

System SI

4030MS02 Schematic Diagram Main Steam Isolation Valve 1MS001B 06/16/1981

8376D49 4in - 1525lb Motor Operated Gate Valve 4-GM78FN 3

D-268832 Spec.# L-2700220 Model D-100-160 Actuator 3" Class 01/30/1984

1500 Valve Assembly

M-135 Diagram of Reactor Coolant Loop -1 Unit 2 BG

M-35 Diagram of Main Steam 07/19/1976

M-48 Diagram of Waste Disposal Steam Generator Blowdown AU

M-61 Diagram of Safety Injection AJ

M-62 Diagram of Residual Heat Removal 05/05/1976

Miscellaneous 1RH8701B Rising STEM Motor Operated Valve Datasheet (RSMDS) 4

EQ-BB-027 Valve Operator, Class RH Motors, Inside Containment 10

EQ-BB-084 Motor Operators (RH Insulation) 6

EQ-BB-104 Environmental Qualification of Limitorque Motor Operators 6

(LR Insulation)

F-2702 SO 386 F-2702 Shop Order 386 Construction F-2802.0386 PO 01/01/1960

Receipt Log 130631 Westinghouse Receipt Log Electrical System

L-0352 Instruction Manual for Main Steam Isolation Valves 05/01/1987

L-0785 Valcor - Operation and Maintenance Manual 1

MOV-DB-BRW- Component Cooling Water System 2

CC

Procedures 1BWEP ES1.3 Transfer to Cold Leg Recirculation Unit 1 301

2BWOA SEC-4 Loss of Instrument Air Unit 2 107

ER-AA-300 Motor-Operated Valve Program Administrative Procedure 12

ER-AA-300-1001 MOV Program Performance Indicators 14

ER-AA-302 Motor-Operated Valve Program Engineering Procedure 7

ER-AA-302-1001 MOV Rising Stem Motor Operated Valve Thrust and 11

Torque Sizing and Set-Up Window Determination

Inspection Type Designation Description or Title Revision or

Procedure Date

Methodology

ER-AA-302-1003 MOV Margin Analysis and Periodic Verification Test 10

Intervals

ER-AA-302-1004 Motor-Operated Valve Performance Trending 13

ER-AA-302-1006 Motor-Operated Valve Maintenance and Testing 19

Guidelines

ER-AA-321 Administrative Requirements for Inservice Testing 13

ER-AA-321-1006 Inservice Testing of Motor Operated Valves 4

ER-AA-410 Air Operated Valve Categorization 6

ER-AA-410-1000 Air Operated Valve Design Basis Review and Setpoint 2

Control

ER-AA-410-1002 Air Operated Valve Testing Requirements 3

ER-AA-410-1003 Air Operated Valve Tracking and Trending Requirements 3

ER-AA-410-1004 Air Operated Valve Program Performance Indicators 11

Work Orders 1061054 1RH8716A Perform Grease/Mech Inspection 08/15/2008

1098849 1SX007 Perform Grease/Mech Inspection 01

218481 Perform Grease Inspection on Gearcase & Gearbox 01

27459 1RH8716A MOV Age Related Inspection & T Drain Plug 01/26/2013

1369261 EQ Overhaul 09/26/2011

1381327 Replace 1B MSIV Actuator Hydraulic Air Filter, Air, Oil 09/04/2011

Pump

1395294 1RH8716A Lubricate Valve Stem 09/04/2011

22495 EQ Replacement of Air Operator Diaphragm 07/31/2012

20796 1SI8801B Motor Operated Valve Diagnostic Test 09/01/2013

21152 1RH8716A Motor Oprtd Vlv Diag Test 01/26/2013

21183 1TIS-PS120 Sec Cooling Loop Outlet Temp of Sec 02/09/2013

Analysis Sys

1657661 IST-STT-2RY455A/456 PORV Vlv Stroke 04/18/2014

1674294 1SI8801B ODEN Breaker 1AP32E Tripped OOT 09/05/2014

1739095 IST-PIT-2SD002A-GH Containment Isolation Valves 03/22/2016

Operability

1740805 IST-LT-2SD02B-H U2 LLRT of Lower S/G B/D 09/22/2015

22275 IST-SIT-1SI8801B/SI8802B/SI8809B/RH8716N-U1 Train B 07/03/2015

Inspection Type Designation Description or Title Revision or

Procedure Date

SI SVAG

23250 IST-1SI8801A/8802A/1RH8716A-SI Svag Vlv Stk Qtrly 09/16/2016

25073 IST-PIT-8801B-U1 Train B SI Isolation Valve Indication 10/10/2016

Test

26736 U1 Main Steam Isol 1MS001A/B/C/F Valve Indication 18 09/22/2016

MO

1837043 IST-1MS001A-D MSIV Full Stroke 09/19/2016

1838870 MVR-Degraded Grease Conditions Noted in 1RH8701B 10/22/2019

1873657 IST-PIT-2SD002A-H Containment Isolation Valves 08/23/2017

Operability

1880981 IST-STT-PIT 2RC014A Stroke Test 02/11/2016

1957684 U1 Train B Safety Injection System SVAG Valve Stroke 12/30/2016

1957951 1SI8801 Indication Test 03/29/2018

1959023 IST-1SI8801A/8802A/8809A/1RH8716A-SI Svag Vlv Stk 04/03/2018

Qtrly

1959319 IST-PIT-8701A/8701B/8716A-1A Rh Suct & Disch Xtie Vlvs 04/03/2018

1963132 IST-1MS001A-D MSIV Full Stroke 04/02/2018

1965829 IST-PIT-1MS001A/B/C/D CNMT Isolation Valve Indication 04/05/2018

4643566 IST_STT-PTT-2RC014A Stroke Test 09/09/2017

4774634 IST-1SI8801A/8802A/8809A/1RH8716A-Si Svag Valve 10/04/2019

Stroke Quarterly Su

4774638 U1 Train B Safety Injection System SVAG Valve Stroke 07/10/2018

4777315 1SI8801B Indication Test 09/01/2019

4851953 IST-STT-PIT 2RC014A Stroke Test 05/06/2020

4853291 IST-LT-2SO002B/D/F/H - U2 LLRT OF LOWER S/G B/O, 05/06/2020

W: 2BWOSR 5.5.8.SD-1B

4893081 IST-STT-2SD002A-H & 2SD005A-D -S/G B/D CNMT ISOL 06/20/2019

VALVES

506783 1SX007 Perform Insp and Prvny MNT on LMTTQ VLV 01

OPRTR

559424 1MS001B MMD 5YR EQ Overhaul 03/27/2006

559482 1SI8801 Motor Operated Valve Diagnostic Test 07/24/2004

559523 1RH8716A SRV for Age Related Degrd 03/16/2004

Inspection Type Designation Description or Title Revision or

Procedure Date

631306 Fab and Install Valve Assembly 03/17/2011

743303 1CC685 Tech Spec Therm O.L. Surv 1AP28E MCC 01

2X4, Cub D4

900411 1CC685 SRV for Age Rltd Degradation 01

918421 1SX007 Motor Oprtd VLV Diag Test 01

958396 Rebuild Actuator, Replace Elastomers and Solenoid Check 11/28/2007

Valves

970005436 1RH8716A Motor Oprtd Valve Diag Test 04/15/1997

98100280 1RH8716A Motor Oprtd Vlv Diag Test 05/07/2004

10