IR 05000373/2019011
| ML19333B843 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 11/29/2019 |
| From: | Ann Marie Stone NRC/RGN-III/DRP/TSS |
| To: | Bryan Hanson Exelon Generation Co, Exelon Nuclear |
| References | |
| IR 2019011 | |
| Download: ML19333B843 (8) | |
Text
November 29, 2019
SUBJECT:
LASALLE COUNTY STATION, UNITS 1 AND 2 - NRC TEMPORARY INSTRUCTION 2515/193, IMPLEMENTATION OF RELIABLE HARDENED CONTAINMENT VENTS INSPECTION REPORT 05000373/2019011 AND 05000374/2019011
Dear Mr. Hanson:
On November 20, 2019, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at LaSalle County Station, Units 1 and 2 and discussed the results of this inspection with Ms. Deborah McBreen 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/
Ann Marie J. Stone, Technical Support Team Leader Technical Support Staff Division of Reactor Projects
Docket Nos. 05000373 and 05000374 License Nos. NPF-11 and NPF-18
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000373 and 05000374
License Numbers:
Report Numbers:
05000373/2019011 and 05000374/2019011
Enterprise Identifier: I-2019-011-0034
Licensee:
Exelon Generation Company, LLC
Facility:
LaSalle County Station, Units 1 and 2
Location:
Marseilles, IL
Inspection Dates:
November 18, 2019 to November 20, 2019
Inspectors:
J. Havertape, Resident Inspector
S. Sheldon, Project Engineer
Approved By:
Ann Marie J. Stone, Technical Support Team Leader
Technical Support Staff
Division of Reactor Projects
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a NRC Temporary Instruction 2515/193, Implementation of Reliable Hardened Containment Vents Inspection at LaSalle County Station, Units 1 and 2, 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.
OTHER ACTIVITIES
- TEMPORARY INSTRUCTIONS, INFREQUENT AND ABNORMAL
2515/193 - Inspection of the Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions
Inspection of the Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions (1 Sample)
- (1) The inspectors reviewed appropriate elements of the reliable hardened containment wetwell vent as described in the plant specific submittals and the associated safety evaluation (ADAMS Accession No. ML19218A365) to determine whether the licensee was in compliance with NRC Order EA-13-109 Phase 1, Reliable, Severe Accident Capable Wetwell Venting System (ADAMS Accession No. ML13143A321).
The purpose of the inspection was to verify the licensee satisfactorily:
- Installed the Hardened Containment Vent System (HCVS) to meet the performance objectives outlined in Section A.1.1 of Attachment 2 to the Order EA-13-109;
- Installed the HCVS system with the design features specified in Section A.1.2 of Attachment 2 to the Order EA-13-109;
- Designed the HCVS to meet the quality standards described in Section A.2 of 2 to the Order EA-13-109;
- Developed and implemented adequate maintenance and testing of HCVS equipment to ensure their availability and capability;
- Developed and issued procedures to safely operate the HCVS using normal power supplies, during Extended Loss of AC Power (ELAP), and a postulated severe accident scenario, and integrated the procedures into existing plant procedures; and
- Trained their staff to assure personnel can proficiently operate the HCVS.
The inspectors reviewed appropriate elements of the reliable wetwell venting strategy as described in the plant specific submittals and the associated safety evaluation (ADAMS Accession No. ML19218A365) to determine whether the licensee was in compliance with NRC Order EA-13-109 Phase 2, Reliable, Severe Accident Capable Drywell (or alternative strategy) Venting System (ADAMS Accession No.
The purpose of the inspection was to verify the licensee satisfactorily developed a strategy making it unlikely to vent from the containment drywell, that includes the following:
- Implemented the Severe Accident Water Addition (SAWA)/Severe Accident Water Management (SAWM) systems as defined and fulfilled functional requirements for installed and portable equipment;
- Installed and/or identified the previously-installed instrumentation necessary to implement SAWM;
- Developed and implemented adequate maintenance and testing of SAWA/SAWM equipment to ensure availability and capability;
- Developed and issued procedures to safely operate the SAWA/SAWM during an ELAP and during postulated severe accident scenario, and integrated their procedures into their existing plant procedures such that entry into and exiting from the procedures are clear when using existing plant procedures; and
- Trained their staff to assure personnel can proficiently operate the HCVS during an ELAP and accident scenario.
The inspectors verified that any noncompliance with requirements, and standards identified during the inspection were entered into the licensee's corrective action program
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On November 20, 2019, the inspectors presented the NRC Temporary Instruction 2515/193, Implementation of Reliable Hardened Containment Vents Inspection results to Ms. D. McBreen and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
2515/193
Corrective Action
Documents
2703470
Technical Errors in Vendor Design Report for HCVS
08/11/2016
2716222
Hardened Containment Vent System (HCVS) Connection
NDE Issue
09/15/2016
3955609
HCVS Tower Knife Plate Bolted Connection Gap
2/08/2016
3970177
HCVS Rupture Disc Follow-Up
2/02/2017
3974587
2PC525A Passes Flow When in Normal
2/15/2017
4010161
HCVS Radiation Monitor Not Mounted Per Vendor Drawings
05/12/2017
4030989
Welded Lugs not Installed on HCVS Pipe
07/11/2019
4098335
Work Order to Set SAWA Flow Meter Parameter
01/29/2018
4109342
HCVS Electrical Routing Deviated from Design Drawings
2/28/2018
4145923
HCVS Batteries Require a Longer Equalizing Charge
05/31/2018
4151839
Trend IR: Small Argon Leak on U2 HCVS Bottle Banks
06/29/2018
4179990
NRC Identified - LOA-FSG-002 Contingency Path Issue
10/02/2018
284007
SAWA Flowmeter Orientation Discrepancy Identified
09/18/2019
296569
Incorrect Diagram Submitted with HCVS Final Integrated
Plan
11/12/2019
Corrective Action
Documents
Resulting from
Inspection
298204
2019 NRC HCVS Walkdown Observation
11/18/2019
298700
NRC 2019 HCVS Inspection - Freeze Line
11/20/2019
298703
NRC 2019 HCVS Inspection LGA-VQ-102/202
11/20/2019
Drawings
Key Diagram Hardened Containment Vent System (HCVS)
25 VDC Distribution Panel 0DC52E
A
M-138 Sheet 2
P&ID Primary Containment Vent and Purge
P
M-138 Sheet 3
P&ID Primary Containment Vent and Purge
A
Miscellaneous
Final Integrated Plan HCVS Order EA-13-109
2/14/2018
2018 - 2019 Long Range Training Plan
Procedures
LGA-001
RPV Control
LGA-003
Primary Containment Control
LGA-004
RPV Blowdown
LGA-VQ-102
Unit 1 Emergency Containment Vent
LOA-AP-101
Unit 1, AC Power System Abnormal
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
LOA-FSG-002
FLEX Electrical Strategy
LOA-FSG-003
FLEX Water Supply Strategy
LOA-FSG-011
FLEX Beyond Design Basis External Event Guidance
LSAMG-001
RPV and Primary Containment Injection
LSAMG-002
RPV, Containment, and Radioactivity Release Control
Work Orders
HCVS Tee Weight Increase
10/24/2017
WO 1940217 - 71
2/16/2017
WO 1942017 - 66
thru 69
U2 HCVS PCIV Testing, Main Control Room and Remote
Operating Station
2/13/2017
WO 4571434 - 16
U2 HCVS Radiation Monitor Loop Calibration
2/23/2017
WO 4573336 - 29
U2 HCVS 2PC525A Troubleshooting
2/21/2017
WO 4591065 - 01
LOS-PC-R4, U2 HCVS Testing of ROS and Manual Bypass
Valves
2/15/2017
WO 4591094 - 01
LOS-PC-R6, U2 HCVS Test of 0PM08J Valves and Logic
2/15/2017
WO 4632060 - 19
LOS-PC-R4, U1 HCVS Testing of ROS and Manual Bypass
Valves
2/21/2017
WO 4632060 - 29
LOS-PC-R6, HCVS Test of 0PM08J Valves and Logic
2/21/2017
WO 4632060 - 40
thru 43
U1 HCVS PCIV Testing, Main Control Room and Remote
Operating Station
2/21/2017
WO 4632060 - 44
2/28/2018
WO 4653865 - 16
and 19
U1 HCVS Radiation Monitor and Argon Pressure Transmitter
Loop Calibration
01/26/2018
WO 4655747 - 01
03/03/2019
WO 4655748 - 01
LOS-PC-Q2, U2 HCVS Operability, Inservice Inspection, and
Walkdown
03/03/2019
WO 4655751 - 01
LOS-PC-R6, U2 HCVS Test of 0PM08J Valves and Logic
03/05/2019
WO 4655752 - 01
LOS-PC-R4, U2 HCVS Testing of ROS and Manual Bypass
Valves
03/05/2019
WO 4655753 - 01
LOS-PC-R3, U2 HCVS Valve and Logic Test
03/05/2019
WO 4663979 - 01
U2 HCVS Radiation Monitor Calibration and Maintenance
07/20/2018