ML24271A305

Summary of Presubmittal Meeting with Arizona Public Service Company to Discuss a LAR to Modify the TS 5.6.5 List of Allowable Methodologies for Palo Verde Nuclear Generating Station, Units 1, 2, and 3

ML24271A305
Person / Time
Site:	Palo Verde
Issue date:	10/04/2024
From:	William Orders Plant Licensing Branch IV
To:	Arizona Public Service Co
Orders, William
Shared Package
ML24271A306	List: ML24271A305
References
EPID L 2024-LRM-0094
Download: ML24271A305 (1)

Text

October 4, 2024

LICENSEE: Arizona Public Service Company

FACILITY: Palo Verde Nuclear Generating Station, Units 1, 2, and 3

SUMMARY

OF AUGUST 29, 2024, PRESUBMITTAL MEETING WITH ARIZONA PUBLIC SERVICE COMPANY TO DISCUSS A LICENSE AMENDMENT REQUEST TO MODIFY THE TECHNICAL SPECIFICATION 5.6.5 LIST OF ALLOWABLE METHODOLOGIES. FOR PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 (EPID L-2024-LRM-0094)

On August 29, 2024, the U.S. Nuclear Regulatory Commission (NRC) staff held an Observation meeting with Arizona Public Service Company (APS, the licensee) via webinar. The purpose of the meeting was to discuss a license amendment request (LAR) for Palo Verde Nuclear Generating Station, Units 1, 2, and 3 (Palo Verde), to modify Technical Specification (TS) 5.6.5, Core Operating Limits Report (COLR), list of allowable methodologies to add the Westinghouse Thermal Design Procedure core thermal/hydraulic analysis methodology. The meeting notice and agenda, dated August 21, 2024, are available in the NRCs Agencywide Documents Access and Management System (ADAMS) at Accession No. ML24234A017. The enclosure to this summary contains a list of attendees. The licensees presentation slides are available in ADAMS at ML24236A703.

During the meeting, the licensee discussed its pl ans to submit the proposed Palo Verde LAR to adopt advanced Westinghouse methodology to modernize reactor core reload design. The licensee plans to submit the LAR in October 2024 and requested the NRCs review be completed by October 2025.

Subsequent to the presubmittal meeting, the NRC staff determined that APS should consider changes to the Palo Verde safety limit (SL) TS for departure from nucleate boiling ratio (DNBR), SL TS 2.1.1.1 in order to align with Palo Verdes safety analysis. These changes would better inform the proposed Palo Verde lic ense amendments and improve the efficiency of the NRCs review.

Specifically, the licensee should consider including information in the potential LAR that:

(1) demonstrates how the DNBR of the reactor core reload design is not less that the DNBR SL in TS 2.1.1.1

(2) demonstrates how the limiting safety system setting for DNBR provides automatic protective action before the DNBR SL in TS 2.1.1.1 is exceeded.

These NRC staff observations were previous ly provided to the licensee in routine communications with the Palo Verde project manager.

The NRC staff did not make any regulatory decisions at the meeting. Members of the public were not in attendance. Public Meeting Feedback forms were not received. Please direct any inquiries to me at (301) 415-3329, or by email at William.Orders@nrc.gov.

/RA/

William Orders, Senior Project Manager Plant Licensing Branch LPL4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Docket Nos. STN 50-528, STN 50-529 and STN 50-530

Enclosure:

List of Attendees

cc: Listserv

LIST OF ATTENDEES

AUGUST 29, 2024, PRESUBMITTAL MEETING WITH

ARIZONA PUBLIC SERVICE COMPANY

PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3

U.S. NUCLEAR REGULATORY COMMISSION Ahsan Sallman Logan Gaul Phillip Sahd Ravi Grover Santosh Bhatt William Orders

ARIZONA PUBLIC SERVICE COMPANY Clyde Meddings David Medek Francisco Diaz Gallegos Hans Van De Berg Mark Drucker Nawaporn Aaronscooke Precious Agbakoko Etemadi Sasan Scott Swoope Thomas Remick

Enclosure

ML24271A306 (Package)

ML24234A017 (Meeting Notice)

ML24236A703 (Public Meeting Slides)

ML24271A305 (Meeting Summary) *concurrence by email OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/LA* NRR/DSS/SNSB/BC* NRR/DORL/LPL4/BC*

NAME WOrders PBlechman PSahd JRankin DATE 9/27/2024 10/1/2024 10/2/2024 10/4/2024 OFFICE NRR/DORL/LPL4/PM*

NAME WOrders DATE 10/4/2024