IR 05000237/2022011
| ML22101A240 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/12/2022 |
| From: | Karla Stoedter NRC/RGN-III/DRS/EB2 |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| References | |
| IR 2022011 | |
| Download: ML22101A240 (10) | |
Text
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - DESIGN BASIS ASSURANCE INSPECTION (PROGRAMS) INSPECTION REPORT 05000237/2022011 AND 05000249/2022011
Dear Mr. Rhoades:
On April 1, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Dresden Nuclear Power Station, Units 2 and 3 and discussed the results of this inspection with Mr. P. Boyle, 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, Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 05000237 and 05000249 License Nos. DPR-19 and DPR-25
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000237 and 05000249
License Numbers:
Report Numbers:
05000237/2022011 and 05000249/2022011
Enterprise Identifier:
I-2022-011-0037
Licensee:
Constellation Energy Generation, LLC
Facility:
Dresden Nuclear Power Station, Units 2 and 3
Location:
Morris, IL
Inspection Dates:
March 14, 2022 to April 01, 2022
Inspectors:
J. Benjamin, Senior Reactor Inspector
B. Jose, Senior Reactor Inspector
A. Shaikh, 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 Dresden Nuclear Power Station, Units 2 and 3, 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.
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 determine 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.
Material condition of the valve including a review of maintenance activities and a walkdown of the valve (if accessible).
- (1) Air Operated Valve (AOV) 3-1601-60: Unit 3 Torus Vent Valve
- (2) Squib 3-1106 A: Unit 3 Standby Liquid Control System Squib Valve
- (3) Motor Operated Valve (MOV) 3-1501-10: Unit 3 High Pressure Coolant Injection (HPCI) System Test Return to Condensate Storage Tank
- (4) MOV 2-1501-38A: Unit 2 Low Pressure Coolant Injection Test Injection Isolation Valve
- (6) AOV 2-1599-61: Unit 2 Torus to Hotwell Containment Isolation Valve
- (7) MOV 2-1201-1: Unit 2 Reactor Water Clean-Up System Inlet Isolation Valve
- (8) Main Steam Isolation Valve 2-0302-1D: Unit 2 Inboard Main Steam Isolation Valve
- (9) MOV 2-1301-3: Unit 2 Isolation Condenser Isolation Valve
- (10) AOV 2-0302-158B: Unit 2 Scram Discharge Volume Drain Valve
- (11) AOV-3 1601-23: Unit 3 Drywell Vent 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 April 1, 2022, the inspectors presented the design basis assurance inspection (programs) inspection results to Mr. P. Boyle, Site Vice President, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
2-1301-3
Midacalc Results DRE-2-1301-3
2-1501-38A
MIDACALC Results MOV 2-1501-38A
AOV-MEDP-
DRE-02-001
Inboard Main Steam Isolation Valve
DRE 02-0038
MOV Alternating Current (AC) Motor Terminal Voltage
Calculation
DRE 03-0015
HPCI MOV Design Basis Document and Differential
Pressure Calculation
0A
DRE 03-0100
Reactor Water Cleanup System Combined DBD and DP
Calculation
000
DRE 16-0040
Seismic Qualification of AVCO Air Pilot Valves
DRE-15-0046
Hardened Containment Vent System (HCVS) Vent Line
Sizing, Unit 3
DRE-3-2301-10
MIDACALC Results, DC MOV Generic Letter (GL) 96-05
Globe Valve 3-2301-10
DRE00-0061
Main Steam Isolation Valves Capability Margin Calculation
0A
DRE01-0066
Dresden Units 2 and 3 Standby Liquid Control (SLC)
Discharge Piping Pressure Drop
DRE03-0013
LPCI Differential Pressure (DP) Calculation
DRE98-0031
Unit 2 Reactor Building Motor Control Centers (MCCs),
Thermal Overload (TOL) Heater Sizing
Calculations
Pratt Order # DD-
664 (Pratty
Original Order #
N-3410-2)
18" 2FII Dimensional Data for Commonwealth Edison
Dresden Plant PO 00013597
07/18/2000
2-2301-3 Unit 2 HPCI Turbine Steam Supply MOV Did Not
Open
03/22/2017
2-2301-3 Weak Link Calculation Revision Required for
Disc and Stem
03/30/2017
2-2301-3 Failed to Close During DIS 2300-05
11/14/2017
3-1601-60 Failed Pressure Decay Test in DOS1600-28
11/04/2018
71111.21N.02
Corrective Action
Documents
3-1601-60-SV, Unit 3 Instrument Air Supply Solenoid
11/08/2018
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Valve Leak
Schematic Diagram Low Pressure Coolant Injection
(LPCI) / Containment Cooling System MOVs 2-1501-18A,
18B, 38A and 38B
AG
Schematic Diagram, Primary Containment Isolation
System (PCIS) Drywell and Torus Vent and Purge
Isolation Control
X
Schematic Diagram Atmospheric Control Inboard and
Outboard Valves
E
Schematic Diagram HPCI Steam Main Pumps and
Condensate Valves
2553-2
" Gate Valve Actuator Operated
09/15/2006
706-4069-007
Assembly (MT1) 3A Line 8.00 Bore (G) 1.38 Rod Dia. NC
2/20/2011
B-397
Checkered Steel Floor Plate Details
06/30/1967
CBO7805
Sub-Assembly of Anti-Rotation Pilot Valve for List 653
MSIV Assembly
01/06/2017
H-29529
900 LB 18-8 MO Stainless Steel Gate Valves Sheet 1
A
M-12
Diagram of Main Steam Piping
F
M-28
Diagram of Isolation Condenser Piping
LR
M-34 Sheet 1
Diagram of Control Rod Drive Hydraulic Piping
AN
M-34 Sheet 2
Diagram of Control Rod Drive Hydraulic Piping
Z
M-356
Diagram of Pressure Suppression Piping
CZ
M-356
Diagram of Pressure Suppression Piping
CZ
Drawings
M-374
Diagram of High Pressure Coolant Injection (HPCI) Piping
CY
Engineering
Changes
401069
Hardened Containment Vent System Modification as
Required by NRC Order EA-13-109
IST-DRE-BDOC-
V-18
Inservice Test (IST) Basis Document, Valve 2-1501-38A
03/01/2019
IST-DRE-BDOC-
V-21
IST Basis Document for Valve 3-1601-60
Engineering
Evaluations
IST-DRE-BDOC-
V-31
IST Basis Document Valve 3-1106A
03/01/2019
Joint Owners Group Programs Summary Report
Miscellaneous
OTC-371
Vendor Thrust Analysis, Required and Maximum for
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Valves 1501-38A and B
DOP 1100-02
Injection of SLC
DOP 1300-01
Standby Operation of the Isolation Condenser
DOP 1300-02
Automatic Operation of the Isolation Condenser
DOP 1300-03
Manual Operation of the Isolation Condenser
DOP 1600-01
Normal Pressure Control of the Drywell or Torus
DOP 1600-03
Unit 2 Quarterly Valve Timing
DOS 0040-07
Verification of Remote Position Indication for Valves
DOS 0040-07
Verification of Remote Position Indication for Valves
DOS 0250-02
Full Closure Timing and Exercising of Main Steam
Isolation Valves
DOS 1100-03
SLC Injection Test
DOS 12600-18
Cold Shutdown Valve Testing
DOS 1600-03
Unit 2 Quarterly Valve Timing
DOS 1600-18
Main Steam Isolation Valve-Safe Closure Test
DOS 2300-01
HPCI Valve Operability and Timing
DOS 7000-01
Local Leak Rate Testing of Main Steam Isolation Valves
DOS-1600-28
Air Operated Valve Fail Safe and Accumulator Integrity
Test
DOS-2300-01
High Pressure Coolant Injection Valve Operability and
Timing
Motor Operated Valve Program
Motor Operated Valve Program Engineering Procedure
MOV Rising Stem Motor Operated Valve Thrust and
Torque Sizing and Setup
Final Joint Owners Group MOV Periodic Verification
Program Implementation
Air Operated Valve Program Implementing Procedure
Air Operated Valve Cattegorization
Air Operated Valve Testing Requirements
Procedures
Diagnostic Testing and Evaluation of Air Operated Valves
Work Orders
00339085
Dresden 2, 10 Year MOV Diagnostic and Limitorque
Surveillance 2-1501-38A
01/06/2011
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
00597794
4th Refuel Replace Actuator on Valve 3-1601-60
09/06/2006
00692782
Year Preventive Maintenance (PM) Lube/Inspection
Limitorque Valve Actuator 3-2301-10
06/16/2016
00743475
Year Standby Liquid Squib Valve A, Replace
Connector
2/12/2007
00769761
Year Motor Operated Valve (MOV) Diagnostic and
Limitorque Surveillance 3-2301-10
03/18/2018
00976072
Dresden 3, 48 Month Standby Liquid Control System
Manually Initiate to Inject Demineralized Water
11/17/2010
01312947
In-Body Seat Found Damaged During Inspection
10/29/2015
01422808
Year Valve Lube Stem Threads Only 3-2301-10
03/20/2016
01803711
Technical Specifications Local Leak Rate Test Valve
3-1601-60
2/09/2016
04710348
Reactor Water Cleanup System MOV Operability and IST
Timing
11/15/2019
04849925
3-1601-60 Failed Pressure Decay Test in DOS 1600-28
11/16/2018
04877777
Month Air Operated Valve(AOV) Accumulator Integrity
Test 3-1601-60
11/02/2020
04981359
Cold Shutdown Valve Testing Surveillance
05/13/2021
05131603
TS Unit 3 Quarterly Valve Stroke Timing 1601-60
06/04/2021
05135479
AOV 1599-61 QTR TS Valve Timing (IST)
06/12/2021
05161497
AOV 1599-61 QTR TS Valve Timing (IST)
09/24/2021