Events Reporting: Waste Management Facilities

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2017

Canadian Nuclear Laboratories (CNL)

Date of event: June 23, 2017

Port Hope Area Initiative (PHAI) Project site

Update (June 26, 2017)

The CNSC was informed by the Port Hope Area Initiative (PHAI) Management Office that after a heavy downpour in the Cobourg and Port Hope areas on June 22 and 23, there were overflows of untreated water from the water collection pond at the Port Hope Project Long-Term Waste Management Facility and from the catch basin at the Port Granby Waste Management Facility. These overflows resulted in environmental releases into Lake Ontario.

Canadian Nuclear Laboratories (the licensee) has the situation under control, and the overflow has stopped.

Water testing is currently underway. Preliminary results from the licensee’s testing confirm that there is no risk to the public or workers. CNSC inspectors will be onsite today to collect samples and oversee licensee follow up actions.

The CNSC is working with the Ontario Ministry of the Environment and Climate Change, and will continue to monitor the situation.

A report will be submitted to an upcoming public Commission proceeding.

Visit PHAI’s public disclosure website for more information.

Original post (June 23, 2017)

The CNSC was informed by the Port Hope Area Initiative Management Office that after several hours of heavy rain, one of the treatment ponds at the site overflowed and entered an engineered storm drain that ultimately drains into Lake Ontario. Water testing is currently being done, and PHAI’s website will provide further information once available.

Canadian Nuclear Laboratories (CNL)

Date of event: April 21, 2017

Port Granby Low-Level Radioactive Waste Management Facility, part of the Port Hope Area Initiative (PHAI)

The CNSC was informed by the Historic Waste Program Management Office of a leak in an underground pipe at the Port Granby Project site. The pipe was used to transfer untreated water to the onsite treatment plant. The spill was confined to the site, and the affected pipe has since been repaired, tested and returned to service. There was no impact on the health and safety of workers and the public. The CNSC will verify that all corrective actions are carried out by CNL to prevent a similar occurrence.

Visit PHAI’s website for more information.

Mississauga Metals and Alloys

Date of event: February 6, 2017

Brantford, ON

The CNSC was informed by Mississauga Metals and Alloys, in accordance with their licence conditions, of a fire that occurred at their Brantford, ON facility. The fire was contained in the main building, and no radioactive substances were affected. The fire was controlled by the Brantford Fire Department. There were no injuries to workers, and there was no radiological impact to the health and safety of the public or the environment.

This event will be discussed at an upcoming public Commission meeting.

Canadian Nuclear Laboratories (CNL)

Date of event: January 13, 2017

Port Granby Low-Level Radioactive Waste Management Facility, part of the Port Hope Area Initiative (PHAI)

The CNSC was informed by the Port Hope Area Initiative Management Office that an early warning system alarm was triggered inside one of the process rooms in the Port Granby Project Waste Water Treatment Plant. The alarm indicated that elevated levels of hydrogen sulphide gas were present. Upon hearing the alarm, all personnel followed procedure and exited the building immediately. There were no off-site effects of this event, and at no point was there a threat to the safety of the public.

Visit PHAI’s website for more information.

2016

Canadian Nuclear Laboratories (CNL)

Date of event: December 1, 2016

Port Granby Low-Level Radioactive Waste Management Facility, part of the Port Hope Area Initiative (PHAI)

The CNSC was informed by the Port Hope Area Initiative Management Office that during waste placement a strong ammonia-like odour was detected. Two workers who were exposed to the odour received medical evaluation and were cleared to return to work. Early indications are that a leaking drum was the source of the odour. At this time, there is no indication that the leaked substance had any offsite effects, or impact on the public.

Visit PHAI's website for more information.

Canadian Nuclear Laboratories (CNL)

Date of event: March 31, 2016

Port Granby Low-Level Radioactive Waste Management Facility, part of the Port Hope Area Initiative (PHAI)

The CNSC was informed by the Port Hope Area Initiative Management Office of an unplanned release of untreated water into Lake Ontario during construction activities at the Port Granby Low-Level Radioactive Waste Management Facility. The impact to the environment is considered negligible, and there was no impact on workers and the public. CNSC staff will verify that all necessary corrective actions are carried out by CNL in order to prevent a similar occurrence.

Visit PHAI's website for more information.

2015

Ontario Ministry of Environment and Climate Change

Date of event: April 29, 2015

Deloro closed mine site, Deloro, Ontario

The CNSC was informed by the Ontario Ministry of Environment and Climate Change (MOECC), in accordance with the regulations and their licence conditions, of an event at the closed Deloro mine site. As a result of cleanup work at the site, there was an unplanned release of construction wastewater due to the collapse of a temporary aqua barrier. The released wastewater was non-radiological and no impact to the environment is anticipated as a result of this event. A CNSC inspector and staff visited the site and were not satisfied with the MOECC's contingency plans to deal with the stability of aqua barriers. On June 5, the CNSC announced that it had issued an order to the MOECC to prevent a similar occurrence at the closed Deloro mine site. This event will be discussed at a public Commission meeting on June 17, 2015.

Read the MOECC's letter to key community stakeholders to learn more about the event and visit the MOECC website for information about the Deloro mine cleanup project.