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Preliminary Notification (PN) Reports for 2023

| March | June | July |

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July
PNO-III-23-001A 07/21/2023 Monticello Nuclear Plant: Update to Preliminary Notification of Event or Unusual Occurrence – PNO-III-23-001
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June
PNO-III-23-002B 06/08/2023 Prairie Island Update to PNO-III-23-002 Declaration of an Unusual Event Following a Turbine Generator and Reactor Trip Due to Fault on Unit 2 Generator Main Transformer
PNO-III-23-002 06/01/2023 Prairie Island Nuclear Plant: Prairie Island Nuclear Power Station Declaration of an Unusual Event Following a Turbine Generator and Reactor Trip Due to Fault on Unit 2 Generator Main Transformer
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March
PNO-III-23-001 03/27/2023 Monticello Nuclear Plant: Controlled Shutdown of Monticello Nuclear Generating Plant Due to Increased Tritium Levels Found in On-Site Groundwater Wells
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Page Last Reviewed/Updated Thursday, August 27, 2026

Page Last Reviewed/Updated Thursday, August 27, 2026