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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 53004 | 9 October 2017 12:37:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declaration for Toxic Gas Spill | At 0737 CDT on 10/9/17, Point Beach declared an Unusual Event with Emergency Action Level HU 3.1 due to report of toxic gas from a spill in a service building within the protected area. The spill is contained and cleanup operations are in progress. The spill was not in a contaminated area or vital area. The janitorial worker injured while mixing cleaning chemicals in a closet was taken to the hospital. The licensee notified the NRC Resident Inspector. Notified DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), DHS Nuclear SSA (email), and FEMA NRCC SASC (email).
Point Beach has terminated the Unusual Event at 0944 (CDT) on 10/9/2017. The Unusual Event condition is no longer warranted. The NRC Resident Inspector has been notified. Notified R3DO (Hills), NRR EO (King), IRD (Stapleton), DHS SWO, FEMA Operations Center, DHS NICC, FEMA NWC (email), DHS Nuclear SSA (email), and FEMA NRCC SASC (email). | ||
| ENS 52627 | 20 March 2017 21:20:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared for Fire Alarm in Containment | At 1620 (CDT), an unusual event was declared due to a smoke detector alarm in Unit 1 containment. (There were) no indications of any other detector alarms, no abnormal equipment indications, and containment parameters are normal (temperature, humidity). At 1631 (CDT), visual inspection (of the) 66 ft. hatch indicated no smoke or abnormal smell. At 1640 (CDT), local inspection of Unit 1 containment verified no fire or hot spots. The licensee has notified the NRC Resident Inspector. Notified DHS SWO, FEMA Ops Center, DHS NICC. Notified FEMA National Watch and Nuclear SSA via E-mail.
Event transmitted under ENS # 52627 is terminated at 2022 (CDT on) 3/20/17." The NRC Resident Inspector has been notified. Notified R3DO (Orlikowski), NRR EO (Miller), and IRD (Stapleton). Notified DHS SWO, FEMA Ops Center, DHS NICC. Notified FEMA National Watch and Nuclear SSA via E-mail. | ||
| ENS 49433 | 13 October 2013 14:46:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | NOTIFICATION OF UNUSUAL EVENT DUE TO CIRCULATING WATER PUMP HOUSE FLOODING Point Beach declared an Unusual Event based on HU 1.6 Uncontrolled Flooding in the Circulating Water Pump house that has the potential to affect safety related equipment needed for the current operating mode. The leak was from the North main Zurn Service Water strainer. Operations entered the appropriate abnormal operating procedure and secured and isolated the affected strainer. The leak is now isolated. The licensee notified the NRC Resident Inspector. Notified the DHS SWO, FEMA and DHS NICC and via E-mail the Nuclear SSA.
The licensee terminated the Unusual Event at 1245 CDT. The licensee notified the NRC Resident Inspector. Notified R3DO (Skokowski), R3RA (Pederson), NRR ET (Uhle), IRD (Morris), NRR EO (Evans), and R3 (Shear). Notified the DHS SWO, FEMA and DHS NICC and via E-mail the Nuclear SSA. | Service water | ||
| ENS 48722 | 6 February 2013 17:43:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration 10 CFR 50.72(b)(3)(iv)(A), System Actuation | Unusual Event - Loss of Offsite Power to Essential Buses for Greater than 15 Minutes | At 1132 CST on 2/6/13, Point Beach Unit 1 experienced a loss of all offsite power due to the loss of 1X-03 High Voltage Station Aux Transformer. The high side circuit switcher opened. However, the 1X-03 transformer did not lock out resulting in G-01 and G-03 Emergency Diesels energizing the 1A-05 and 1A-06 4160 VAC busses (safety related). The cause of the loss of offsite power is being investigated. In order to exit the event, the plant requires either 345 kV power to be restored or cross-tie plant power between the units. If cross-tied, Technical Specifications require the gas turbine to be placed on the cross-tie within 24 hours. The plant remained at 100% power and there was no effect on Unit 2. The licensee notified the NRC Resident Inspector. Notified the DHS SWO, FEMA, DHS NICC, and the Nuclear SSA (via e-mail).
There were specified system actuations with the original event. Emergency diesel generators (EDG) G-01, 2, 3, and 4 started on the undervoltage conditions with G-01 and G-03 loading onto their respective buses. 1P-53, motor driven aux feed pump started as designed on the EDG breaker closures. Offsite power has been restored to safeguards buses and the EDGs have been removed from the buses. Troubleshooting continues on the initial fault. All other systems functioned as designed. The unusual event has been terminated as of 1340 CST on 2/6/13. The safeguards buses are being powered from Unit 2 through the electrical cross-tie. The licensee notified the NRC Resident Inspector. Notified the R3DO (Kunowsky), NRR EO (Evans), IRD (Marshall), DHS SWO, FEMA, DHS NICC, and the Nuclear SSA (via e-mail). | Emergency Diesel Generator | |
| ENS 47863 | 26 April 2012 02:06:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Alert Declared Due to Toxic Gas Build Up Following an Emergency Diesel Generator Test Run | On April 25, 2012 at 2106 CDT, Point Beach Nuclear Plant declared an Alert under EAL HA3.1 due to toxic gas in a vital area. During a maintenance run on the plant's emergency diesel generator, diesel exhaust caused the concentration of carbon monoxide in an adjacent vital area room (Plant Instrument Air Compressor Room) to exceed OSHA IDLH (Immediately Dangerous to Life and Health) levels. The diesel was immediately secured and the room was ventilated. There were no personnel injuries and no public health and safety issues associated with this event. The licensee notified the NRC Resident Inspector. Notified DHS SWO, FEMA, USDA, DOE, DHS NICC, HHS AND EPA.
The Alert at Point Beach was terminated at 2314 CDT on 04/25/12. The licensee notified the NRC Resident Inspector. Notified R3DO (Lara), NRR EO (Lubinski), IRD (Scott via email only). Notified DHS SWO, FEMA, USDA, DOE, DHS NICC, HHS, EPA, and Nuclear SSA (email only).
On April 25, 2012, at 2106 CDT, Point Beach Nuclear Plant declared an Alert under EAL HA3.1 (EN #47863) due to toxic gas in a vital area. During a maintenance run on the plant's emergency diesel generator, diesel exhaust caused the concentration of carbon monoxide in an adjacent vital area room (Plant Instrument Air Compressor Room) to exceed OSHA IDLH (Immediately Dangerous to Life and Health) levels. The diesel was immediately secured and the room was ventilated. There were no personnel injuries and no public health and safety issues associated with this event. This retraction is based on the fact that station personnel incorrectly used an Alert trigger value for toxic gas concentration that was well below the actual value which would pose an immediate danger to life and health. In a subsequent evaluation, NextEra concluded that the station used the carbon monoxide (CO) OSHA limits (OSHA Permissible Exposure Limit 8-hour time weighted average of 50 ppm to 200 ppm short term exposure limit) that are normally monitored for confined spaces. The recommended CO limit value of 1200 ppm was determined to be the correct IDLH for the plant air compressor room, the actual reading in the room was 124 ppm. The plant air compressor room is not a confined space, and is not required to be monitored to the same limits as a confined space. Therefore, the Emergency Notification made on April 25, 2012, documenting an Alert due to toxic gas in a vital area is retracted. The NRC Resident Inspector has been notified. Notified R3DO (Kunowski). | Emergency Diesel Generator | |
| ENS 47478 | 27 November 2011 08:38:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration 10 CFR 50.72(b)(3)(iv)(A), System Actuation | Unusual Event Due to a Loss of Offsite Power During Switching Operations | At 0238, Point Beach Unit 1, classified an Unusual Event based on CU3.1, loss of power to or from the 1X-04 transformer that results in a loss of all offsite power to both safety-related busses 1A-05 and 1A-06 for greater than 15 minutes and at least one emergency (diesel) generator is supplying power to an emergency bus. The 1X-04 transformer converts 345 kV to 13.8 kV. Both Emergency Diesel Generators are running supplying the safety-related busses. The licensee notified State and local agencies and the NRC Resident Inspector.
Off-site power to Unit 1A-05 and 1A-06 Safeguards Busses has been restored via Unit 2 2X-03 High Voltage Station Transformer and 1X-04 Low Voltage Station Transformer. During the transient, all four Emergency Diesel Generators (EDGs) started as expected with G-01 EDG supplying the Unit 1 1A-05 Safeguards Bus and G-03 EDG supplying 1A-06 Safeguards Bus. Off-site power to the Unit 2 Safeguards Buses was not affected. The start of the EDGs is also reportable under 10CFR 50.72 (b)(3)(iv)(A). All systems responded as designed during the transient and operators performed in accordance with procedures and their training. Unit 1 is stable in Mode 5 within normal operating bands. Unit 2 remains operating at 100% power. The Unusual Event was terminated at 0700 (CST) on November 27, 2011. A press release is planned. The licensee has notified State and local agencies and the NRC Resident Inspector. Notified R3DO (Julio Lara), IRD MOC (Jane Marshall), NRR EO (Sher Bahadur), DHS (Rickerson), and FEMA (Hollis). | Emergency Diesel Generator | |
| ENS 44336 | 4 July 2008 00:45:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Sodium Hypochlorite Leak | At 1945 Point Beach declared a UE based on HU 3.1, 'Report or detection of toxic or flammable gases that has or could enter the site area boundary in amounts that can affect NORMAL PLANT OPERATIONS.' This Emergency Action Level (EAL) was entered based on a confirmed Sodium Hypochlorite tank leak to the tanks diked area. The leak is located below the current tank level and will continue to drain to the dike until equilibrium level is reached. The dike is designed to contain the entire tank contents. There are no signs of any leakage outside of the dike. The vapors in the immediate area are not significant at this time and extra ventilation has been provided by opening an overhead roll up door in the area. The NRC Senior Resident Inspector has been notified. The sodium hypochlorite is used in the screen house to chlorinate the service water and circulating water systems to eliminate Zebra Mussels. The concrete diked area is designed to contain the entire contents of the tank.
At 0646 (CDT) on 7/4/08 Point Beach terminated the UE that was declared at 1945 CDT on 7/3/08, based on HU 3.1. The leaking Sodium Hypochlorite tank and leak control dike have been drained and the over flow leak control area cleaned. The hazard no longer exists and the area has been released to normal access. The licensee informed State and local agencies and the NRC Resident Inspector. Notified R3DO (Kozak), EO (Brown), IRD (Gott), FEMA (Canupp) and DEHS (Inzer). | Service water Circulating Water System | |
| ENS 43907 | 15 January 2008 20:15:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(a)(1)(i), Emergency Class Declaration 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | Unusual Event - Loss of Offsite Power | At 1404 1/15/2008, Central time, Point Beach experienced a loss of Unit 1X-04, Low Voltage Station Auxiliary Transformer. This loss has caused Point Beach to declare an Unusual Event (SU 1.1, Loss of all Offsite Power to essential busses for greater than 15 minutes.) The loss of Unit 1X-04 transformer is under investigation. All equipment operated properly with the exception of 1B-04, 'B' train 480 VAC Safeguards Bus, supply breaker opened for unknown reasons. The licensee notified the NRC Resident Inspector. Preparations are underway for a Unit 1 shutdown. Both Unit 1 EDGs are running and supplying Unit 1 safeguard buses. Non-safety buses are powered from an auto transfer that occurred after the loss of 1X-04. No impact on Unit 2 due to the Unit 1 electrical transient. Licensee notified state and local emergency management agencies.
On 1/15/08 at 1941 central time, FPL Energy Point Beach, LLC issued a press release concerning the Unusual Event at Point Beach that was declared on 1/15/08 at 1415 central time. The Unusual Event was reported under EN# 43907 and occurred due to the loss of all offsite power to essential busses for greater than 15 minutes from the failure of the Unit 1 X-04, Low Voltage Station Auxiliary Transformer. The NRC Resident Inspector has been informed of the press release and this subsequent notification.
At 1404 on 1/15/08 central time, Point Beach experienced a loss of Unit 1 X-04, Low Voltage Station Auxiliary Transformer. This loss caused Point Beach to declare an Unusual Event and that was reported under EN# 43907. Technical Specification 3.8.1.B, Associated unit's 13.8/4.16 kv (X04) transformer inoperable, was not met as of 1404 on 1/15/08 and this LCO has a Required Action to restore the (X04) transformer to Operable status with a Completion time of 24 hours. At 1404 1/16/08 the LCO was still not met and Unit 1 entered Technical Specification 3.8.1.H Required Action and associated Completion Time Not met, with a required action to be in Mode 3 in 6 hours and Mode 5 in 36 hours. This Event Notification Worksheet is for the initiation of the Technical Specification Required reactor shutdown that commenced at 1549 on 1/16/08, per 10 CFR 50.72(b)(2)(i). The licensee notified the NRC Resident Inspector. Notified R3DO(Stone), NRR EO(Evans), and IRD(Blount).
Update: At 1947 CST on 01/16/08, the Unit 1 reactor reached MODE 3, completing the required Technical Specification Shutdown. Offsite power has been restored to the essential busses by paralleling from Unit 2 4160 V buses and the Emergency Diesel Generators G-01 and G-03 have been placed back to a normal standby alignment. The unit is being taken to MODE 5 in accordance with plant TS requirements. This update to EN #43907 also reports the termination of the Unusual Event (AT 2035 CST) SU1.1, Loss of all offsite power to essential buses for greater than 15 minutes initially reported via EN #43907. The State of Wisconsin and the counties of Kewaunee and Manitowoc were notified of the termination via the Nuclear Accident Reporting System (NARS) at 2041 on 1/16/08. The licensee notified the NRC Resident Inspector. Notified R3DO(Stone), NRR EO(Evans), NRR ET(Dyer), DHS(Gray), FEMA(Dunker), and IRD(Blount).
Update: At 0702 CST on 01/17/08, FPL Energy Point Beach, LLC issued a press release regarding the termination of the Unusual Event and the shutdown of Unit 1 for repair of 1- X04 transformer. The NRC resident inspector was notified of the press release." R3DO (Stone) notified. | Emergency Diesel Generator | 05000266/LER-2008-001 |
| ENS 42912 | 17 October 2006 02:26:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event - Identified Leakage Greater than 25 Gpm | At 2126, PBNP Unit 2 had a inadvertent PORV (431C) lift. This was a momentary event, however, a PRT level change of 60 gallons was noticed. This event is classifiable per C.U.1.2 identified leakage greater than 25 GPM on Unit 2. This event has been terminated at 2139. This event was caused by a momentary loss of power to the PORV controller. Power was immediately restored. The event was caused when a manually operated breaker (MOB) was inadvertently operated while the licensee was working inside the panels on the "B" train RHR system. The licensee notified the NRC Resident Inspector, State and local officials.
Unit 2 was in Mode 5 at ~150 psig, ~112 degrees F and the pressurizer (PZR) was in a water-solid condition per plant procedures. The following is a timeline of the event for clarification: 20:47:49 A manually operated breaker (MOB-281) inadvertently opened while removing a caution tag resulting in an increase of flow in the RHR system. 20:48:43 MOB-281 was reclosed correcting the RHR flow perturbation, however the adjacent breaker (MOB-282) inadvertently opened due to the vibration of MOB-281 being manipulated. This resulted in the loss of power to the RCS pressure instrumentation providing an input to a power-operated relief valve (PORV) causing the affected PORV to open. The PORV opening provided a flow path from the PZR to the Pressurizer Relief Tank (PRT). 20:49:06 MOB-282 was reclosed resulting In the PORV shutting and isolating the flow path from the PZR to the PRT. 20:55 The PRT level indication was checked on the Main Control Board, no change in level was observed as compared to prior to the event. While additional actions to stabilize the plant were being taken, the Shift Manager directed additional data to be obtained from the Plant Process Computer System (PPCS) regarding PRT parameters as the amount of water transferred was not large enough to be identified on the control board level Indication due to meter resolution. 21:26 Analysis of the PPCS data indicated that 62.5 gallons of RCS inventory had been transferred from the PZR to the PRT while the PORV was open. It was identified that this exceeded allowable RCS leakage limits, and the Emergency Plan was implemented. 21:32 An Unusual Event was declared per EAL CU 1.2, identified leakage greater than 25 gpm. It was recognized that this was a transient event and would be promptly terminated as the leakage flow path had been secured. 21:39 The Unusual Event was terminated. 21:43 State and County agencies were notified. 21:50 NRC Resident notified. 22:15 1 hour ENS Notification for Unusual Event and subsequent termination completed. The licensee notified the NRC Resident Inspector. Notified R3DO (Skokowski). |