Event Notification Report for June 21, 2024

EN Revision Imported Date: 6/21/2024

EN Revision Text: HIGH PRESSURE COOLANT INJECTION INOPERABLE

The following information was provided by the licensee via phone and email:

"At 1629 EDT on 05/09/2024, the high pressure coolant injection (HPCI) system was declared inoperable due to a pinhole through-wall leak identified on the seal drain line for 23HOV-1 (HPCI trip throttle valve) downstream of the restricting orifice 23RO-137A. The location of the defect is in the class 2 safety related piping. HPCI is a single train safety system and this notification is being made in accordance with 10 CFR 50.72(b)(3)(v)(D)."

The NRC Senior Resident Inspector has been notified.

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

This pinhole leak was discovered during normal operator rounds. Although HPCI is declared inoperable and in a 14-day limited condition of operation, the system function remains available. In addition, all other ECCS systems are currently operable. Compensatory measures (walkdowns) have been implemented to ensure the leak rate does not significantly increase.


* * * RETRACTION ON 06/20/2024 AT 1423 EDT FROM CAMERON KELLER TO ROBERT THOMPSON * * *

"FitzPatrick performed an additional technical evaluation of the steam leak identified on May 9, 2024. The evaluation concluded that the HPCI system would have remained operable and performed its specified safety function with a postulated complete failure of this pipe, considering its size, location, and impact of the leak. Additionally, all components in the vicinity would have retained their required safety functions. Based on this conclusion, EN 57120 is being retracted.

"The NRC Senior Resident Inspector has been notified."

Notified R1DO (Elkhiamy).

AGREEMENT STATE REPORT - STOLEN TROXLER GAUGE

The following is information provided by the Pennsylvania Department of Environmental Protection Bureau of Radiation Protection (DEP) via email:

"On June 14, 2024, an employee of the licensee reported to police that their vehicle, with a nuclear density gauge secured in the trunk, was stolen earlier that day. Local police are aware of the incident. The DEP has been in contact with the licensee and will update this event as soon as more information is provided.

"Manufacturer and Model Number: Troxler Electronic Laboratories
"Model Number: 3440
"Serial Number: 35459
"Isotope and Activity: Cesium 137, 9 millicuries; Americium 241:Be, 44 millicuries."

PA Event Report ID No: PA240012

Surrounding States and the Pennsylvania emergency response team have been notified.

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

INOPERABILITY OF DIVISION 3 DIESEL GENERATOR SUPPORTING HIGH PRESSURE CORE SPRAY

The following information was provided by the licensee via phone and email:

"At 1640 EDT on 06/18/2024, the division 3 diesel generator was declared inoperable. This condition could prevent the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). All other emergency core cooling systems were operable during this time.

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.

"The division 3 diesel generator was declared inoperable due to potential water intrusion into the electrical generator. Inspection of the generator is in progress."


The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

This event resulted in Perry Unit 1 entering a 72 hour limiting condition for operation (LCO) in accordance with Technical Specification 3.8.1. condition 'B'.

OFFSITE NOTIFICATION

The following information was provided by the licensee via phone and email:

"At 1537 CDT on June 19, 2024, the shift manager was informed that a contract company to Xcel Energy would be notifying the Occupational Safety and Health Administration (OSHA) pursuant to the requirements of 29 CFR 1904.39. Notification to OSHA is required due to a contract employee who suffered a personal health condition while at an offsite facility for training and was declared deceased following emergency medical service departure to the medical facility."

The NRC Resident Inspector has been notified of this event.