IR 05000352/2020013

Temporary Instruction 2515/193 Inspection Report 05000352/2020013 and 05000353/2020013

ML20266G286
Person / Time
Site:	Limerick
Issue date:	09/22/2020
From:	Josephine Ambrosini Division Reactor Projects I
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
Ambrosini J
References
IR 2020013
Download: ML20266G286 (7)

Text

September 22, 2020

SUBJECT:

LIMERICK GENERATING STATION, UNITS 1 AND 2 - TEMPORARY INSTRUCTION 2515/193 INSPECTION REPORT 05000352/2020013 AND 05000353/2020013

Dear Mr. Hanson:

On September 11, 2020, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Limerick Generating Station, Units 1 and 2 and discussed the results of this inspection with Mr. Martin Bonifanti 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, X /RA/

Signed by: Josephine A. Ambrosini Josephine A. Ambrosini, Team Leader Technical Support and Administrative Team Division of Reactor Projects Docket Nos. 05000352 and 05000353 License Nos. NPF-39 and NPF-85

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000352 and 05000353 License Numbers: NPF-39 and NPF-85 Report Numbers: 05000352/2020013 and 05000353/2020013 Enterprise Identifier: I-2020-013-0000 Licensee: Exelon Generation Company, LLC Facility: Limerick Generating Station, Units 1 and 2 Location: Sanatoga, PA 19464 Inspection Dates: September 7, 2020 to September 11, 2020 Inspectors: D. Werkheiser, Senior Reactor Analyst A. Ziedonis, Senior Resident Inspector Approved By: Josephine A. Ambrosini, Team Leader Technical Support and Administrative Team Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a Temporary Instruction (TI) 2515/193 inspection at Limerick Generating 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) PHASE 1 The inspectors evaluated licensee implementation of the appropriate elements of the reliable hardened containment wetwell vent as described in the plant specific submittal(s) and the associated NRC safety evaluation [ADAMS Accession No.

M19112A145]. Specifically, the inspectors evaluated licensee implementation of the hardened containment vent system (HCVS) functional requirements, design features, maintenance and testing, quality standards, and programmatic requirements as described in Appendix A of TI 2515/193 Revision 1.

PHASE 2 The inspectors evaluated licensee implementation of the appropriate elements of the reliable wetwell venting strategy as described in the plant specific submittal(s) and the associated NRC safety evaluation [ADAMS Accession No. M19112A145].

Specifically, the inspectors evaluated licensee implementation of severe accident water addition / severe accident water management (SAWA/SAWM) functional requirements, installed instrumentation, maintenance and testing, and programmatic requirements as described in Appendix B of TI 2515/193 Revision

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

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

• On September 11, 2020, the inspectors presented the Temporary Inspection 2515/193 inspection results to Mr. Martin Bonifanti and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

2515/193 Corrective Action 4361152

Documents 4361146

4358228

4350405

4346354

4345916

4350427

4349090

4346156

4341056

4316206

4316199

231186

212802

212781

212779

212770

212763

212755

4185900

4157226

4157225

4139792

4136549

4106726

4077449

21285

4018286

Corrective Action 04368729

Documents

Resulting from

Inspection

Inspection Type Designation Description or Title Revision or

Procedure Date

Drawings M-57, Sht 1 / 4 Containment Atmosphere Control, U1, U2, and Common Revision 49 /

M-57, Sht. 8 and Containment Hardened Vent (U1 and U2) Revisions 0 /

1

Engineering 16-00012 / 00270 FUKUSHIMA HARDENED VENT MODIFICATIONS (On-line Various

Changes / 422831 / 423333 / Off-line / U1 / U2 / Common)

/ 423381

Miscellaneous LGS TI-2515/193 Reliable Hardened Containment Vent and 09/08/2020

SAWA/M Summary Presentation

ML19112A145 LIMERICK GENERATING STATION, UNITS 1 AND 2 - 05/14/2019

SAFETY EVALUATION REGARDING IMPLEMENTATION

OF HARDENED CONTAINMENT VENTS CAPABLE OF

OPERATION UNDER SEVERE ACCIDENT CONDITIONS

RELATED TO ORDER EA-13-109

Procedures CC-LG-118 SITE IMPLEMENTATION OF DIVERSE AND FLEXIBLE Revision 9

COPING STRATEGIES ( SPENT FUEL POOL

INSTRUMENTATION AND HARDENED CONTAINMENT

VENT (HCVS) PROGRAM

CC-LG-118-1004 Final Integrated Plan, HCVS Order EA-13-109 for Limerick Revision 0,

Generating Station 11/14/2018

OP-LG-102-106 OPERATOR RESPONSE TIME PROGRAM AT LIMERICK Revision 11

STATION

T-101 Common RPV Control Revision 026

T-102 Common Primary Containment Control Revision 027

T-103 Common Secondary Containment Control Revision 024

T-300 FLEX Pump Setup at Spray Pond Revision 004

T-301 U1 / U2 RPV Injection From Spray Pond Revisions

005 / 007

T-341 U1 / U2 PRIMARY CONTAINMENT VENTING VIA HARDENED Revisions

CONTAINMENT VENT SYSTEM 001 / 002

Self-Assessments AR 04314889-04 HCVS compliance Pre-NRC Inspection 05/19/2020

5