Public Disclosures

The following information is provided in accordance with the ongoing commitment by Canadian Nuclear Laboratories (CNL) to voluntarily disclose events to the public related to the Port Hope Area Initiative (PHAI).

Port Granby, July 18, 2019

As a result of torrential rainfall causing flash flooding in Southern Ontario on
July 17, 2019, surface water overflowed from catchment areas at the Port Granby Project waste management sites, located near the Lake Ontario shoreline in Southeast Clarington. Berms used to contain the water became inundated and were breached, resulting in overflows.

Upon discovery of the overflows at approximately 7:00 a.m., CNL’s contractor took immediate action to redirect the water by pumping it to on-site storage tanks and ponds, and to deploy additional sandbags, which effectively stopped the overflows. The berms were repaired that same day.

Based on observation of the overflow and the size and extent of the flow paths, it is estimated that 80 – 150 cubic metres of surface water flowed to the lake, about the volume of water in a backyard swimming pool. 

At no time was there a health or safety risk to workers or the public. Water samples were taken at the catchment areas and have been sent to an independent laboratory for analysis. The results are expected to show that the effect on the environment was negligible because the surface water had been diluted significantly by the heavy rainfall.

CNL proactively notified the Canadian Nuclear Safety Commission and the Municipality of Clarington of the overflows. 

A fact-finding investigation by CNL is underway, and this disclosure will be updated if new information becomes available. 

Port Granby, July 17, 2019

As a result of the extreme rainfall on July 17, 2019 that caused widespread flooding across Durham Region, surface water overflowed catchment areas on the Port Granby Project site. CNL took immediate action to address the situation and notify the Canadian Nuclear Safety Commission and the Spills Action Centre.
There is no health or safety risk to the public, and the effect on the environment is expected to be negligible.

This disclosure will be updated when more information becomes available. 

Port Granby, January 11, 2019

At approximately 11 a.m. on January 9, 2019, a worker was injured while unloading a truck at CNL’s Port Granby Long-Term Waste Management Facility. The injured worker was transported to a medical centre for treatment. Immediately following the incident, CNL stopped work related to the activity, ensured the appropriate regulatory agencies were notified and began a full investigation.

Additional meetings focusing on safe work practices are being held at PHAI sites reinforcing that safety is one of CNL’s core values.

There was no risk to the public and no environmental impact as a result of the incident.

Port Hope, January 9, 2019

At approximately 12:00 p.m. on 2019 Jan. 8, CNL identified a sheen on the water beside a barge being used for PHAI work in Port Hope Harbour. On discovery, absorbent pads were immediately used to remove the sheen, and an absorbent boom was deployed around the barge as a precaution. It was determined that the sheen likely resulted from a very small volume – less than one litre – of hydraulic fluid being washed into the water during barge deck cleaning.

CNL notified the appropriate regulatory agencies, including the Ontario Spills Action Centre and the Canadian Nuclear Safety Commission.  

At no time was there a risk to the safety of workers or the public.


January 9, 2019