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Wright County News

Posted on: March 24, 2023

Xcel Energy, MPCA Release Statements Regarding Monticello Nuclear Plant

Xcel Energy and the Minnesota Pollution Control Agency have released statements dealing with the Monticello Nuclear Generating Plant. Both statements can be seen below.

Here is the statement from the Minnesota Pollution Control Agency:

Statement on Xcel Energy shutdown of Monticello nuclear plant 
 (March 23, 2023) - The Minnesota Pollution Control Agency and Minnesota Department of Health are encouraged that Xcel Energy is taking immediate action to address the recurring issue of water containing tritium leaking from the Monticello Nuclear Generating Plant.  

State agencies were made aware this afternoon of an additional water leak at the Monticello facility following previous news about the leak of 400,000 gallons of water containing tritium. In the State Duty Office report filed today, Xcel Energy states that the new leak, located near the spot of the previously reported release, is still ongoing.  

State agencies have no evidence at this point to indicate a current or imminent risk to the public and will continue to monitor groundwater samples. Should an imminent risk arise, we will inform the public promptly.  

We encourage the U.S. Nuclear Regulatory Commission (NRC), which has regulatory oversight of the plant’s operations, to share ongoing public communications on the leak and on mitigation efforts to help residents best understand the situation.  

The Minnesota Pollution Control Agency and the Minnesota Department of Health will continue to review Xcel’s response to the groundwater contamination and oversee the recovery, storage, and disposal of the impacted groundwater. We will also continue to coordinate with city, county, and other local officials to make sure the public is kept informed of developments.   

Contact: Andrea Cournoyer, 612-438-8932


Here is the statement from Xcel Energy:

Xcel Energy to Take Monticello Nuclear Plant Offline to Fix Tritium Leak

MINNEAPOLIS (March 23, 2023) – Xcel Energy will begin powering down its Monticello Nuclear Generating Plant tomorrow to allow it to more quickly perform the repairs needed to permanently resolve a leak of water containing tritium at the plant. The company does not anticipate any impacts to customers’ electric service from powering the plant down early.

“While the leak continues to pose no risk to the public or the environment, we determined the best course of action is to power down the plant and perform the permanent repairs immediately,” said Chris Clark, president of Xcel Energy–Minnesota, North Dakota and South Dakota. “We are continuing to work with and inform our state, federal, city and county leaders in the process.”

After identifying the source of the leak late last year, which poses no health and safety risk to the local community or the environment, Xcel Energy implemented a short-term solution to capture water from the leaking pipe and reroute it back into the plant for re-use. This solution was originally designed to prevent any new tritium from reaching the groundwater until the company could install a replacement pipe during a regularly scheduled refueling outage in mid-April.

However, monitoring equipment at the plant Wednesday indicated a small amount of new water from the original leak had reached the groundwater. Upon investigation, operators discovered the temporary solution was, over the past two days, no longer capturing 100% of the leaking water. The new leakage — anticipated to be in the hundreds of gallons, a much smaller amount of water than previously leaked — will not materially increase the amount of tritium the company is working to recover and does not pose any risk to health or the environment.

Tritium is a compound that is naturally present in the environment and is commonly created in the operation of nuclear power plants. It emits low levels of radiation, similar to everyday materials people use and the food we all eat.

Ongoing monitoring from over two dozen on-site monitoring wells confirms that the leaked water remains fully contained on-site and has not been detected beyond the facility or in any local drinking water. State agencies continue to monitor Xcel Energy’s remediation work to ensure the continued safety of the local community and surrounding environment. To date, Xcel Energy has recovered about 32% of the tritium released and will continue recovery over the course of the next year.

The schedule for resuming operation at the plant is still to be determined. The plant is also scheduled to begin its refueling process this spring, with maintenance and construction projects taking place that can only be completed when the plant is not operating. Refueling and plant maintenance will improve the reliability of equipment at the plant and help to ensure that Monticello continues to provide safe, clean, and reliable power to the region.

Members of the public who have questions about the leak or the plant powering down early are invited to attend one of two open houses at the Monticello Community Center: Friday, March 24 (10 a.m. to 1 p.m.) and Monday, March 27 (5 p.m. to 8 p.m.).

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