"The actuations were not initiated in response to actual plant conditions, these were not intentional manual initiations, and there were no parameters satisfying the requirements for initiation.
#Radium fuel system plus#
The momentary losses of 'Y80' were due to an intermittent, age-related degradation issue with the 'Uninterruptible Power Supply Y81, Division 2 120VAC Class 1E Inverter', which resulted in a temporary loss of output plus a lack of static switch transfer from the inverter supply to the alternate source as designed. "At approximately 0402 Central Daylight Time (CDT) on Apand at approximately 16 CDT on May 4, 2023, momentary losses of 'Y80 Division 2 Uninterruptible 120VAC Class 1E Distribution Panel', which provides power to Division 2 Primary Containment Isolation logic, resulted in a partial Primary Containment Group 2 Isolation (gas systems), initiation of the Standby Gas Treatment system, and the shift of Control Room ventilation to the high radiation mode. "This telephone notification is provided in accordance with 10 CFR 50.73(a)(1) and 10 CFR 50.73(a)(2)(iv)(A) to report an invalid actuation of Division 2 Primary Containment Isolation logic at the Monticello Nuclear Generating Plant (MNGP) that occurred while in a refueling outage.
The following information was provided by the licensee email: It does not necessarily result in harm to the patient.Ħ0 DAY NOTIFICATION FOR AN INVALID ACTUATION OF PRIMARY CONTAINMENT ISOLATION LOGIC No other exposure to staff is reported."Ī Medical Event may indicate potential problems in a medical facility's use of radioactive materials. "Follow up with the patient will be perform in the next few days and ongoing.
#Radium fuel system skin#
The 15 Gy was delivered to the keloid surface, and skin tolerance in a single fraction is greater than 25 Gy.
"The SH medical physicist noted that 13 Gy in a single fraction is an effective treatment for the patient's condition (keloids on and around both ears).
The AU has informed the patient and the referring physician. The incident was discovered around 1630 the same day. The authorized user (AU) intended for 15 Gy to be delivered in three 5 Gy fractions, but it was planned and delivered in a single 15 Gy treatment. "On, a dose misadministration occurred during high dose rate brachytherapy at the Sacred Heart (SH) Radiotherapy Department. The following information was provided by the Washington State Office of Radiation Protection via email: "ĪGREEMENT STATE REPORT - DOSE MISADMINISTRATION "Commercial telecommunications to the plant were restored at approximately 0600 EDT on. "The NRC Decommissioning Inspector has been notified of the retraction. This is consistent with NUREG 1022, Revision 3, Supplement 1, 'Event Report Guidelines 10 CFR 50.72(b)(3)(xiii),' and NEI 13-01, Revision 0, 'Reportable Action Levels for Loss of Emergency Preparedness Capabilities.' It was determined that no actual or potential loss of offsite communications capability existed per 10 CFR 50.72(b)(3)(xiii). Based on further investigation, the Emergency Plan and Emergency Implementing Procedures provide an acceptable alternative routine communication system, which is satellite phones, for communicating with Federal, State, and local offsite agencies, that are in addition to the primary commercial telephone system. "This notification is being made to retract event EN 56501 that was reported on May 02, 2023. PNP will be notifying the NRC resident inspector. The telecommunications provider has not provided an estimated repair time." The condition did not affect the ENS or commercial telecommunications capabilities at the offsite Emergency Operations Facility. In addition, if needed, the satellite phone would be used to initiate call-out of the emergency response organization. Communications link via the satellite phone was tested satisfactorly. After discovery of the condition it was discovered that this loss also included the emergency notification system (ENS). "At approximately 1500 on, it was determined that the commercial telecommunications capacity was lost to the Palisades Nuclear Plant (PNP) control room and technical support center due to an issue with the telecommunications provider. The following information was provided by the licensee via email:
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