IR 05000461/2021010

Design Basis Assurance Inspection (Programs) Inspection Report 05000461/2021010

ML21077A196
Person / Time
Site:	Clinton
Issue date:	03/18/2021
From:	Karla Stoedter Division of Reactor Safety III
To:	Rhoades D Exelon Generation Co, Exelon Nuclear
References
IR 2021010
Download: ML21077A196 (11)

Text

March 18, 2021

SUBJECT:

CLINTON POWER STATION - DESIGN BASIS ASSURANCE INSPECTION (PROGRAMS) INSPECTION REPORT 05000461/2021010

Dear Mr. Rhoades:

On March 11, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Clinton Power Station and discussed the results of this inspection with Mr. T. Chalmers, 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 No. 05000461 License No. NPF-62

Enclosure:

As stated

Inspection Report

Docket Number: 05000461 License Number: NPF-62 Report Number: 05000461/2021010 Enterprise Identifier: I-2021-010-0029 Licensee: Exelon Generation Company, LLC Facility: Clinton Power Station Location: Clinton, IL Inspection Dates: February 22, 2021 to March 12, 2021 Inspectors: J. Corujo-Sandin, Senior Reactor Inspector J. Glisan, General Engineer Nran M. Jones, Reactor Inspector B. Jose, Senior Reactor Inspector E. Magnuson, 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 Clinton 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 Disease (COVID-19), regional inspectors were directed to begin telework. During this time regional baseline inspections were evaluated to determine if all or portions of the objectives and requirements stated in the IP could be performed remotely. In some cases, portions of an IP were completed remotely and on-site.

The inspection documented below was determined that the objectives and requirements stated in the IP could be completed remotely.

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 reviewed the valves listed below to evaluate the following:

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

b. Whether the sampled POVs are capable of performing their design-basis functions.

c. 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. Maintenance activities through performance of a walkdown of the sampled POVs (if accessible).

(1) 1C11-139; Control Rod Drive (CRD) Hydraulic Control Unit Scram Pilot Solenoid Operated Valve

(2) 1C11F011; CRD Scram Drain Line Flow Control (FC) Air Operated Valve (AOV)

(3) 1C41F004A; Standby Liquid Control (SLC) Pump A, Discharge Explosive (Squib)

Valve

(4) 1E51F063; Reactor Core Isolation Cooling Steam Line Inboard Isolation Motor Operated Valve (MOV)

(5) 1SX041A; Shutdown Service Water (SSW) 1VY085A High Pressure Core Spray Pump Room Service Water Outlet FC - AOV

(6) 1E12F042B; Residual Heat Removal (RHR) Pump1B, Low Pressure Core Injection MOV

(7) 1E21F005; Low Pressure Core Spray (LPCS) Shut Off MOV

(8) 1C11F180; CRD Scram Vent Line FC - AOV

(9) 1E12F064A; RHR Pump 1A, Minimum Flow (MF) MOV

(10) 1E12F068A; RHR Heat Exchanger 1A, SSW Outlet MOV

(11) 1E22F012; HPCS Suppression Pool MF Bypass MOV

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

• On March 11, 2021, the inspectors presented the design basis assurance inspection (programs) inspection results to Mr. T. Chalmers, 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 1E12F042B MIDACALC Result 1E12F042B (CPS-1) AC Motor 5

(CPS-1) Operated GL96-05 Gate Valve

1E12F068A MIDACALC Results 1E12F068A (CPS-1) AC Motor 12/05/2013

(CPS-1) Operated GL96-05 Gate Valve

1E21F005 MIDACALC Results1E21F005 (CPS-1) AC Motor 2

(CPS-1) Operated GL96-05 Gate Valve

1E22F012 MIDACALC Results 1E22F012 (CPS-1) 8

(CPS-1)

AD Report Maximum and Required Thrust Analysis Report 02/07/1991

R90.162

AD Report Maximum and Required Thrust Analysis Report - 12/14/1990

R90.168 1E22F012

AD Report Maximum and Required Thrust Analysis Report 1

R90.202

AD Report Maximum and Required Thrust Analysis Report 01/14/1991

R90.207

AOV-MARG- ACE (Air Operated Valve Calculation Engine) Calculation 0

CPS-1C11F011 for 1C11F011

CL-MISC-005 CL-MISC-005 - REV. 004 - MOV Program Risk Ranking 4

Input

CL-MISC-011 Air Operated Valve (AOV) Program Risk Ranking Input 1

DC-ME-09-CP Equipment Environmental Design Conditions 07/20/2020

IP-CL-023 Seismic Qualification of Motor Operated Valves (MOVs) 04/21/1998

Tag No. 1E12-F014A/B, 1E12-F068A/B

IP-CL-023 Seismic Qualification of MOVs 1E12-F014 A/B, 0

1E12-F0068 A/B with SMB-0-25 Operator

IP-CL-028 Seismic Qualification of MOV 1E22-F012 Anchor Darling 0

(A/D) 4" - 900# Gate Valve with SB-0-25 Operator

IP-CL-032 Seismic Qualification of MOVs 1E12-F064A, B, C, A/D, 1

4"-300# Gate with SB-00-10 Operator

IP-M-0001 Bounding Differential Pressure Calculation for Selected 1

High Pressure System MOVs

Inspection Type Designation Description or Title Revision or

Procedure Date

IP-M-0129 Residual Heat Removal (RHR) Loop A and B Differential 4-E

Pressure Calculation for GL 89-10

IP-M-0612 Design Basis System Parameters for AOVs 1C11F010, 0

1C11F011, 1C11F180, and 1C11F181

IP-M-0612 Design Basis System Parameters for AOVs 1C11F010, 10/06/2000

1C11F011, 1C11F180, and 1C11F181

IP-M-0622 ACE Calculation for 1C11F180 1

ME-04.00 Stem Thrust/Torque Evaluation for MOVs 12

Mida F064A MIDACALC MOV Datasheet [1E12F064A] 4

Corrective Action 00687545 Water Hammer on Service Water Piping to High Pressure 10/22/2007

Documents Core Spray (HPCS) Room Coolers

270721 Change 1E22F012 Replacement Date 08/09/2019

4135906 Valve Stem Broken for 1E22-F012 05/09/2018

Corrective Action 04404920 (POV) NRC ID: Ambiguity in ER-AA-300 02/26/2021

Documents 04406232 1C11F011 Model Number Does Not Match Information on 03/03/2021

Resulting from E02-1RP99-02A

Inspection 04407939 NRC ID No IRs For UNSAT As-Found Data 03/10/2021

04408159 NRC ID Oil/Grease Leak on 1E12F042B 03/11/2021

Drawings 93-14626 4"- 300 Weld Ends, Carbon steel Flex Wedge Gate Valve B

with SB-00 Limitorque

93-15009 18"-150 Weld Ends, Carbon Steel Flex Wedge Gate Valve B

with SMB-0 Limitorque and Indicator Rod

E02-1AP53 Key Diagram, Auxiliary Building Motor Control Center X

(MCC) 1B3

E02-1RI99 Schematic Diagram, Reactor Core Isolation Cooling M

(RCIC) Steam Isolation Valves 1E51-F063 & 1E51-F064

E02-1SC99, Electrical Schematic Diagram, Standby Liquid Control W

Sh. 2 (SLC) System

M05-1002, Sh. 1 Piping and Instrumentation Drawing (P&ID), Main Steam V

System

M05-1046 P&ID Containment Building Equipment Drain System M

M05-1073 P&ID Low Pressure Core Spray (LPCS) System AH

M05-1074 P&ID High Pressure Core Spray (HPCS) AH

M05-1075, Sh. 1 P&ID RHR System AO

Inspection Type Designation Description or Title Revision or

Procedure Date

M05-1075, Sh. 2 P&ID RHR System AZ

M05-1076, Sh. 1 P&ID, RCIC System AH

M05-1077, Sh. 1 P&ID, SLC System AC

VPF3736-500 1" Control Rod Drive (CRD) Vent Valve 10

Engineering 624558 Evaluation of 1E22F012 Valve Seat Degradation 0

Changes

Engineering ME-04.00 Stem Thrust/Torque Evaluation for MOVs 12

Evaluations

Miscellaneous EVP 070925 EVP 070925 - Magnesium Rotor Inspection for MOV 09/26/2007

Motors

FCD Limitorque SMB/SB Series Installation and Maintenance 3

LMAIM1401-00 Manual

N-CL-OPS- HPCS System 5

209002

Procedures CPS 9051.02 HPCS Valve Operability Test 42d

CPS 9053.04 RHR A/B/C Valve Operability Checks 46a

CPS 9843.01 In Service Test (IST) Category "A" Valve Leak Rate Test 36d

ER-AA-300 MOV Program Administrative Procedure 12

ER-AA-302 MOV Program Engineering Procedure 7

ER-AA-302-1001 Rising Stem MOV Thrust and Torque Sizing and Set-Up 11

Window Determination Methodology

ER-AA-410 AOV Program Implementing Procedure 6

MA-AA-723-300 Diagnostic Testing of MOVs 14

MA-AA-743-310 Diagnostic Testing and Evaluation of AOVs 8

MA-CA-723-301- Clinton Specific MOV PM Information 4

3001

MA-CL-301-1001 Preventive Maintenance (PM) for MOVs 1

WC-AA-120-F-01 PM Work Order (WO) Disposition Sheet 2

Work Orders 00155728 Verify MOV Thermal Overload Bypass 1E51-F063 05/02/2018

00155756 MOV Stem Lubrication 1E51-F063 01/29/2017

00500056 Perform MOV Thrust Verification 1E51-F063 12/29/2003

00973837 Overhaul Actuator and Replace Accessories for 01/30/2008

1C11F011 AOV

Inspection Type Designation Description or Title Revision or

Procedure Date

01074425-01 During 1SX041A/B Stroking Water Hammer Heard, Relief 11/29/2017

Lift

01150752-01 Thrust Verification 1E12-F042B 01/29/2010

01308071-01 1E12-F042B - Inspect Magnesium Rotor for Degradation 12/17/2011

01329366 Perform MOV Thrust Verification and Clean/Inspect 12/14/2011

1E21F005

01414304 Perform Thrust Verification and MOV Clean and Inspect 03/26/2012

1E12F068A

01456808 MOV Stem Lubrication 1E12F042B 10/23/2013

01518247 Perform Flow Scan in Support of the AOV Program for 11/04/2013

1C11F011

01580626 Perform MOV Thrust Verification and Clean/Inspect 05/19/2017

1E21F005

01585738 Perform Thrust Verification and MOV Clean and Inspect 10/20/2017

1E12F068A

01614767 MOV Stem Lubrication 1E12F064A 10/17/2017

01686197-01 1E12-F042B Clean & Inspect/Thrust Verification 05/15/2015

01697759 Perform Thrust Verification/Clean and Inspect - 1E22F012 03/14/2017

01759037 Overhaul Actuator and Replace Accessories for 07/07/2017

1C11F011 AOV

01760312 Scram Discharge Volume (SDV) Vent and Drain Valve 10/29/2015

Operability Test

01858827-01 1E12-F042B Perform Boroscopic Motor Inspection 05/24/2017

01878384 MOV Stem Lubrication 05/19/2017

01922633 SDV Vent and Drain Valve Operability Test 10/24/2017

04629180 MC021K01 Local Leak Rate Test (LLRT) RHR A System 09/04/2019

04630521 MC037K05 LLRT HPCS System 05/16/2018

04632095 9053.04C001/D001 Operations Perform RHR A Valve 10/16/2018

Position Indication Test

04645310 1C11F180 Bench Set Low, Friction High 10/11/2019

04668604 Replace Limitorque Actuator 1E12F068A 04/08/2019

04702113-01 Perform Flowscan in Support of the AOV Program 01/10/2019

1SX041A

Inspection Type Designation Description or Title Revision or

Procedure Date

04711083 Perform Flow Scan in Support of the AOV Program for 10/17/2019

1C11F011

04711186 Perform Flowscan in Support of the AOV Program 10/07/2019

1C11F180

04774071 1E12-F042B Clean & Inspect/Thrust Verification 10/04/2019

04780605 Hydraulic Control Unit (HCU) 40-45 Scram Pilot Solenoid 09/28/2019

Vent Valve Leaking Air, Replace Valve

04782517 Valve Stem Broken for 1E22-F012 05/12/2018

04788521 1E22-F012 MOV Stem Lubrication 04/06/2020

048668135 Perform Thrust Verification and Clean/Inspect 12/18/2019

MOV 1E51-F063

04964521 Repair/Replace Field Wiring on MOV 1E51-F063 10/04/2019

04993658 9051.02A21 HPCS Valve Operability (Stroke Time) 03/10/2020

05016755 9051.02A21 HPCS Valve Operability (Stroke Time) 06/10/2020

05051514 9051.02A21 HPCS Valve Operability (Stroke Time) 09/11/2020

05078817 9051.02A21 HPCS Valve Operability (Stroke Time) 12/10/2020

22633 9012.01B20 SDV Vent and Drain Valve Operability Test 10/24/2017

4779767 9012.01B20 SDV Vent and Drain Valve Operability Test 10/29/2019

4805097 LLRT LPCS System Water Test 09/04/2019

4975558 9012.01A20 SDV Vent and Drain Valve Operability 01/20/2020

(Stroke Time)

5002645 9012.01A20 SDV Vent and Drain Valve Operability 04/21/2020

(Stroke Time)

5035342 9012.01A20 SDV Vent and Drain Valve Operability 07/21/2020

(Stroke Time)

5066132 9012.01A20 SDV Vent and Drain Valve Operability 10/20/2020

(Stroke Time)

9