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Title: Byron Station Declares Unusual Event
Source: Exelon Press Release
Date: Jan 30, 2012
[...] Operators at Byron Generating Station declared an Unusual Event at 10:18 a.m.CT, due to the loss of offsite power and Unit 2 coming offline.
The nuclear facility’s diesel generators activated as designed to provide power to the facility when there is a loss of offsite power to the facility. The facility remains in a safe condition. Station engineering experts are looking into the cause of the loss of offsite power.
Byron Station is designed to depressurize to reduce steam pressure as part of the many redundant safety systems built into the facility. Steam from the unit is released through safety relief valves that are specifically designed for this purpose. The steam, which will evaporate quickly, contained expected levels of tritium. Local residents may see or hear the steam release in progress, which will continue throughout the day until the unit cools down. These types of station releases are regulated by the Nuclear Regulatory Commission.
There is no health or safety impact to workers or to the public from the release, and Exelon Nuclear has notified allappropriate local, state and federal officials of the Unusual Event. [...]
Read the report here
Title: Power loss shuts down one nuclear plant unit; public in no danger in Dixon IL, Sterling, IL and Rock Falls IL
Source: Shaw News Service
Author: Chris Johnson
Date: January 30, 2012 12:17 p.m. CST
A loss of power coming into the plant this morning led to an emergency shutdown of a unit at the Byron Nuclear Generating Station, but posed no danger to the public, an Exelon spokesman said. [...]
Smoke coming from the auxiliary building actually was steam coming from a relief valve, he said. [...]
Workers were evacuated and Byron and several other area fire departments were on stand by at the scene as precautionary measures, he said. [...]
PHOTO CAPTION: A loss of offsite power led to the shutdown of unit 2 at Byron’s Exelon Generating Station Monday morning. Steam from a relief valve can be seen escaping the auxiliary building. (The yellow building with brown roof. The concrete building is the containment building)
Read the report here
h/t Anonymous tips
Question by Robert in Byron, IL: What level of tritium is being released? How much? How will it affect us living within 2 miles of the facility? Is the steam being vented from the secondary loop or the primary loop?
- Byron and several other area fire departments were called to stand by at the scene as a precautionary measure, [Exelon spokesman Paul Dempsey] said. -Ogle County News
- The Nuclear Regulatory Commission Region III office in Lisle, Illinois, has activated its incident response center and entered monitoring mode due to an Unusual Event declared at the Byron nuclear power plant -Penn Energy
- UPDATE: Nuke Plant Spokeswoman: "Smoke was seen coming from an auxiliary transformer but the fire department found no fire" -Reuters
- UPDATE II: NRC: "Not a huge concern" at nuke plant outside Chicago -- Employees reported seeing smoke coming from transformer after outage, no fire found
- UPDATE III: Reporters at Byron Press Conference: A lot of people are calling us about a loud noise -- Was a special emergency response team on scene? (VIDEO)
- UPDATE IV: Reporters at Byron Press Conference: A lot of people are calling us about a loud noise -- Was a special emergency response team on scene? (VIDEO)
- UPDATE V: Fireman Eyewitness: "It looked like a lot of smoke coming from containment building" at Byron nuclear plant -- Had to be told it was steam -- Original call said a building at Byron nuclear plant was filling up with smoke (VIDEO)
- UPDATE VI: Reporter Appears Suspicious: Isn't it unusual for fire dept. to be called to Byron nuclear plant for a release of steam? (VIDEO)
- UPDATE VII: State of Wisconsin issues statement on nuclear "incident" in Illinois -- Currently monitoring conditions after plant lost power and went offline
- UPDATE VIII (Jan. 31): Rare quake hits near troubled Illinois nuke plant releasing radioactive steam -- "That's right, she said earthquake" (VIDEO)
- UPDATE IX: AP: Officials don't yet know how much radiation is being released from Illinois nuke plant -- NRC inspectors in control room
An look back at how the press, NRC, state government and plant operator handled the worst commercial nuclear power reactor accident in US history, Three Mile Island:
Published: January 30th, 2012 at 2:54 pm ET