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

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

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

Procedure

Type

Designation

Description or Title

Revision or

Date

71111.21N.02 Calculations

10.2.117

Copes Vulcan Air Operated Control Valves Design Report

BRW-01-0153-E

Environmental Parameters of EQ Zones

BRW-01-0153-E

/BYR0l-068

Environmental Parameters of EQ Zones

BRW-95-059

Braidwood 1&2 CC System MOV Differential Pressure

Calculation

BRW-97-0821-M

Safety Injection MOV Differential Pressure Calculation

BRW-98-0392-M

Residual Heat Removal System (RHR) MOV Differential

Pressure Calculation

BRW-98-0596-E

Generic Thermal Overload Heater Sizing Calculation for

Motor Operated Valves

2/05/1998

BRW-98-0718-E

Motor Operated Valves (MOV) Actuator Motor Terminal

Voltage & Thermal Overload Sizing

Calculation - Component Cooling (CC) System

BRW-98-0721-E

Motor Operated Valves (MOV) Actuator Motor Terminal

Voltage and Thermal Overload Sizing Calculation-Residual

Heat Removal (RH) System

2/23/1999

BRW-98-0723-E

Motor Operated Valves Actuator Motor Terminal Voltage

and Thermal Overload Sizing Calculation

BRW-98-0724E

Motor Operated Valve (MOV) Actuator Motor Terminal

Voltage and Thermal Overload Sizing Calculation-SX

System

CQD-012298

Review of Seismic Qualification Test Report for 1" Solenoid

Valves (1&2RC014A-F)

EMD-030608

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

Solenoid Valve for Braidwood Station

ENC-QE-51.D

Seismic Qualification Reevaluation of the Safety Injection

Motor Operated Valves

EQ-BB-027

Limitorque MOV Actuators Outside Containment

EQ-BB-047

Environmental Qualification of Borg Warner Valves

EQ-BB-084

Limitorque Motor Operators (RH Insulation)

EQ-GEN023

Environmental Qualification of Namco Control Limit Switch

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

Series

EQ-GEN023

Environmental Qualification of Namco Control Limit Switch

Series

15A

EQ-GEN040

Environmental Qualification of Valcor V526 Series Solenoid

Valves

EQDP-MECH

Westinghouse - Environmental Qualification of Pumps and

Valves

F-2756

Main Steam Isolation Valves

Corrective Action

Documents

2479735

OSP-R Degraded Grease Conditions Noted in 1RH8701B

04/04/2015

2567440

OSP-A Valve Dual Indication When Open (2SD002D)

10/08/2015

4004530

OSP-P MLB 4 GRP3 12.2 2SD002F Status Light Not

Working

04/30/2017

4183361

OSP-R 2SI8801A Mechanical Grease Inspection Grade 3

10/14/2018

219454

Stem Adapter Replacement on 1SX005

2/12/2019

4304505

Leak off the 2SD002H Valve

2/17/2019

Corrective Action

Documents

Resulting from

Inspection

4375109

NRC ID - POV Inspection W/D - 1SX005

10/07/2020

4378979

Braidwood DBAI Power Operated Valves - Observations

10/23/2020

Drawings

2000003

Air Cylinder Assembly Spring Loaded Fail Closed 2 Inch

Globe Valve

C

20E-1-4018A

Relaying & Metering Diagram 4160V ESF Switchgear Bus

141

X

20E-1-4019A

Relaying & Metering Diagram 480V ESF Switchgear Bus

131X

K

20E-1-

4030CC04

Schematic Diagram CCW From Reactor Coolant Pumps

Thermal Barrier Isolation Valves 1CC9438 & 1CC685

N

20E-1-

4030EH06

Schematic Diagram Residual Heat Removal Heat

Exchanger 1A & 1B Crosstie Valves 1RH8716A &

1RH8716B

03/31/1978

20E-1-

4030RH04

Schematic Diagram RC Loop 1A to RHR Pump Isolation

Valves 1RH8701A & RH88701B

Q

20E-1-4030SI06

Schematic Diagram Boron Injection Tank Discharge

Isolation Valves 1SI8801A & 1SI8801B

L

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

20E-1-4687D

External Wiring Diagram 480V Auxiliary Building ESF MCC

2X4 Section D

K

20E-1-4689A

External Wiring Diagram 480V Auxiliary Building ESF MCC

2X5 1AP32E

N

20E-1-4883

Internal-External Wiring Diagram Motor Operated Valves

System SI

L

4030MS02

Schematic Diagram Main Steam Isolation Valve 1MS001B

06/16/1981

8376D49

4in - 1525lb Motor Operated Gate Valve 4-GM78FN

D-268832

Spec.# L-2700220 Model D-100-160 Actuator 3" Class

1500 Valve Assembly

01/30/1984

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)

EQ-BB-027

Valve Operator, Class RH Motors, Inside Containment

EQ-BB-084

Motor Operators (RH Insulation)

EQ-BB-104

Environmental Qualification of Limitorque Motor Operators

(LR Insulation)

F-2702 SO 386

Receipt Log

F-2702 Shop Order 386 Construction F-2802.0386 PO

130631 Westinghouse Receipt Log Electrical System

01/01/1960

L-0352

Instruction Manual for Main Steam Isolation Valves

05/01/1987

L-0785

Valcor - Operation and Maintenance Manual

MOV-DB-BRW-

CC

Component Cooling Water System

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

ER-AA-300-1001 MOV Program Performance Indicators

ER-AA-302

Motor-Operated Valve Program Engineering Procedure

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

Torque Sizing and Set-Up Window Determination

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

Methodology

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

Intervals

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

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

Guidelines

ER-AA-321

Administrative Requirements for Inservice Testing

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

ER-AA-410

Air Operated Valve Categorization

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

Control

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

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

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

Work Orders

1061054

1RH8716A Perform Grease/Mech Inspection

08/15/2008

1098849

1SX007 Perform Grease/Mech Inspection

218481

Perform Grease Inspection on Gearcase & Gearbox

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

Pump

09/04/2011

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

Analysis Sys

2/09/2013

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

Operability

03/22/2016

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

Procedure

Type

Designation

Description or Title

Revision or

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

Test

10/10/2016

26736

U1 Main Steam Isol 1MS001A/B/C/F Valve Indication 18

MO

09/22/2016

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

Operability

08/23/2017

1880981

IST-STT-PIT 2RC014A Stroke Test

2/11/2016

1957684

U1 Train B Safety Injection System SVAG Valve Stroke

2/30/2016

1957951

1SI8801 Indication Test

03/29/2018

1959023

IST-1SI8801A/8802A/8809A/1RH8716A-SI Svag Vlv Stk

Qtrly

04/03/2018

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

Stroke Quarterly Su

10/04/2019

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,

W: 2BWOSR 5.5.8.SD-1B

05/06/2020

4893081

IST-STT-2SD002A-H & 2SD005A-D -S/G B/D CNMT ISOL

VALVES

06/20/2019

506783

1SX007 Perform Insp and Prvny MNT on LMTTQ VLV

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

Procedure

Type

Designation

Description or Title

Revision or

Date

631306

Fab and Install Valve Assembly

03/17/2011

743303

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

2X4, Cub D4

900411

1CC685 SRV for Age Rltd Degradation

918421

1SX007 Motor Oprtd VLV Diag Test

958396

Rebuild Actuator, Replace Elastomers and Solenoid Check

Valves

11/28/2007

970005436

1RH8716A Motor Oprtd Valve Diag Test

04/15/1997

98100280

1RH8716A Motor Oprtd Vlv Diag Test

05/07/2004