05000354/LER-2023-003, Inadvertent Main Turbine Control Valve Closure Caused Reactor Scram

Inadvertent Main Turbine Control Valve Closure Caused Reactor Scram

ML24043A168
Person / Time
Site:	Hope Creek
Issue date:	02/12/2024
From:	Agster T Public Service Enterprise Group
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
LR-N24-0008 LER 2023-003-00
Download: ML24043A168 (1)

LER-2023-003, Inadvertent Main Turbine Control Valve Closure Caused Reactor Scram

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(iv)(A), System Actuation
3542023003R00 - NRC Website

text

Thomas R. Agster Plant Manager, Hope Creek Generating Station, PSEG Nuclear LLC PO Box236 PSEG I NUCLEAR Hancocks Bridge, New Jersey 08038-0221 LR-N24-0008 February 12, 2024 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-001 Hope Creek Generating Station Renewed Facility Operating License No. NPF-57 Docket No. 50-354 10 CFR 50.73

Subject:

Licensee Event Report 2023-003-00, Inadvertent Main Turbine Control Valve Closure Caused Reactor Scram In accordance with 10 CFR 50.73(a)(2)(iv)(A), PSEG Nuclear LLC submits the attached licensee event report (LER).

There are no regulatory commitments contained in this letter.

Please contact Bernadette Humphrey at (856) 339 - 1308 if you have questions.

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T omas R. Agster Plant Manager, Hope Creek Generating Station Attachment: Licensee Event Report cc:

USNRC Regional Administrator - Region 1 USN RC NRR Project Manager - Hope Creek USNRC Senior Resident Inspector-Hope Creek NJ Department of Environmental Protection, Bureau of Nuclear Engineering

Abstract

Hope Creek Generating Station 00354 3

Inadvertent Main Turbine Control Valve Closure Caused Reactor Scram 12 14 2023 2023 003 00 02 12 2024 1

88 Bernadette Humphrey (856) 339 - 1308 03 15 2024 ABSTRACT On December 14, 2023, at 1939 EST, while attempting to manually close a failed open #4 turbine control valve (TCV), the #4 TCV closed rapidly. This caused a scram on average power range monitor (APRM) high neutron flux due to a rise in reactor pressure.

Hope Creek Generating Station (HCGS) repaired the #4 TCV by replacing the servo valve. In addition, the fast-acting solenoid (FAS) valve and the shutoff valve were replaced. HCGS synchronized the Main Generator to the grid on December 17, 2023, at 1537 EST.

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3. LER NUMBER YEAR SEQUENTIAL NUMBER REV NO.

052 050 PREVIOUS EVENTS There have been no previous events at HCGS in the last three years where the #4 TCV caused a reactor scram.

CORRECTIVE ACTIONS

Hope Creek Generating Station (HCGS) repaired the #4 TCV by replacing the servo valve, the fast-acting solenoid valve, and shutoff valve. HCGS synchronized the Main Generator to the grid on December 17, 2023, at 1537 EST.

Additional corrective actions will be determined in the Root Cause Evaluation.

COMMITMENTS

There are no regulatory commitments in this LER.

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Hope Creek Generating Station 00354 2023 003 00

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