Independent Environmental Monitoring Program: Gentilly-2 Nuclear Facility

Hydro-Québec is licensed by the CNSC to operate the Gentilly-2 Nuclear Facility (G-2 facility), located in Bécancour, QC. The G-2 facility was permanently shut down in December 2012. Since then, activities conducted by Hydro-Québec have been to stabilize and transition the G-2 facility to safe storage. Hydro-Québec has a comprehensive environmental protection program to monitor and control radiological (nuclear) and non-radiological (hazardous) substances released from the site, determine concentrations in the environment and assess exposure to the public.

The Independent Environmental Monitoring Program (IEMP) results for 2015 and 2016 confirm that the public and the environment in the vicinity of the G-2 facility are protected, and that there are no expected health impacts.

Legend

[ ] Guideline/Reference Level

Gentilly-2 Points

Showing 1 to 10 of 10 entries
Sample Type Sample Description Parameter 2015 Result 2016 Result Guideline/
Reference Level
Expected Health Impact (Yes/No) Background Sample Code
Foodstuffs Beets Organically Bound Tritium < 1.5 Bq/kg fresh weight 45,200 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Beets Cesium-137 < 1.1 Bq/kg fresh weight 160 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Beets Tritiated water < 2.8 Bq/kg fresh weight 104,000 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Beets Cobalt-60 < 1.3 Bq/kg fresh weight 373 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Tomatoes Organically Bound Tritium < 1.5 Bq/kg fresh weight 50,300 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Tomatoes Cesium-137 < 0.76 Bq/kg fresh weight 258 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Tomatoes Tritiated water 2.6 Bq/kg fresh weight 123,000 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Tomatoes Cobalt-60 < 0.84 Bq/kg fresh weight 242 Bq/kg fresh weight No N/A GI07-F04
Foodstuffs Carrots Organically Bound Tritium < 1.5 Bq/kg fresh weight < 1.5 Bq/kg fresh weight 45,200 Bq/kg fresh weight No N/A GI07-F05
Foodstuffs Carrots Cesium-137 < 1.08 Bq/kg fresh weight < 1 Bq/kg fresh weight 160 Bq/kg fresh weight No N/A GI07-F05
Foodstuffs Carrots Tritiated water 1.9 Bq/kg fresh weight < 2.8 Bq/kg fresh weight 104,000 Bq/kg fresh weight No N/A GI07-F05
Foodstuffs Carrots Cobalt-60 < 1.27 Bq/kg fresh weight < 1.3 Bq/kg fresh weight 373 Bq/kg fresh weight No N/A GI07-F05
Foodstuffs Blueberries Organically Bound Tritium < 1.5 Bq/kg fresh weight 50,300 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Blueberries Cesium-137 < 0.64 Bq/kg fresh weight 258 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Blueberries Tritiated water 2.7 Bq/kg fresh weight 123,000 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Blueberries Cobalt-60 < 0.76 Bq/kg fresh weight 242 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Cabbage Organically Bound Tritium < 1.5 Bq/kg fresh weight 45,200 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Cabbage Cesium-137 < 0.9 Bq/kg fresh weight 160 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Cabbage Tritiated water 3.9 Bq/kg fresh weight 104,000 Bq/kg fresh weight No N/A GI07-F06
Foodstuffs Cabbage Cobalt-60 < 1.1 Bq/kg fresh weight 373 Bq/kg fresh weight No N/A GI07-F06
Soil Arable soil Cesium-137 3.05 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI07-S07
Soil Arable soil Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI07-S07
Soil Soil (0-5 cm) Cesium-137 2.61 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI07-S07
Soil Soil (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI07-S07
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI07-V08
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI07-V08
Air Elemental Tritium - 5,100,000 Bq/m3 No N/A GI01-A01
Air Cesium-137 < 0.0001 Bq/m3 2.56 Bq/m3 No N/A GI01-A01
Air Tritiated water < 2 Bq/m3 340 Bq/m3 No N/A GI01-A01
Air Iodine-131 < 0.001 Bq/m3 0.228 Bq/m3 No N/A GI01-A01
Soil Arable soil Cesium-137 1.26 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI01-S01
Soil Arable soil Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI01-S01
Soil Soil (0-5 cm) Cesium-137 1.24 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI01-S01
Soil Soil (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI01-S01
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI01-V01
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI01-V01
Soil Sand (0-5 cm) Cesium-137 < 0.32 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI09-SA01
Soil Sand (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI09-SA01
Water Surface Water Gross Alpha < 0.08 Bq/L < 0.09 Bq/L 0.5 Bq/L No N/A GI06-W06
Water Surface Water Gross Beta 0.09 Bq/L 0.1 Bq/L 1 Bq/L No N/A GI06-W06
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI06-W06
Water Surface Water Tritiated water < 3 Bq/L < 3 Bq/L 7,000 Bq/L No N/A GI06-W06
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI06-W06
Air Elemental Tritium < 1.9 Bq/m3 5,100,000 Bq/m3 No N/A GI04-A04
Air Cesium-137 < 0.000049 Bq/m3 2.56 Bq/m3 No N/A GI04-A04
Air Tritiated water < 1.9 Bq/m3 340 Bq/m3 No N/A GI04-A04
Air Cobalt-60 < 0.000055 Bq/m3 0.832 Bq/m3 No N/A GI04-A04
Air Iodine-131 0.0011 Bq/m3 0.228 Bq/m3 No N/A GI04-A04
Foodstuffs Tomatoes Organically Bound Tritium < 1.5 Bq/kg fresh weight < 1.5 Bq/kg fresh weight 50,300 Bq/kg fresh weight No N/A GI06-F02
Foodstuffs Tomatoes Cesium-137 < 0.76 Bq/kg fresh weight < 0.8 Bq/kg fresh weight 258 Bq/kg fresh weight No N/A GI06-F02
Foodstuffs Tomatoes Tritiated water 8 Bq/kg fresh weight 6.3 Bq/kg fresh weight 123,000 Bq/kg fresh weight No N/A GI06-F02
Foodstuffs Tomatoes Cobalt-60 < 0.84 Bq/kg fresh weight < 0.9 Bq/kg fresh weight 242 Bq/kg fresh weight No N/A GI06-F02
Foodstuffs Carrots Organically Bound Tritium < 1.5 Bq/kg fresh weight < 1.5 Bq/kg fresh weight 45,200 Bq/kg fresh weight No N/A GI06-F03
Foodstuffs Carrots Cesium-137 < 0.77 Bq/kg fresh weight < 1.1 Bq/kg fresh weight 160 Bq/kg fresh weight No N/A GI06-F03
Foodstuffs Carrots Tritiated water 6 Bq/kg fresh weight 5.8 Bq/kg fresh weight 104,000 Bq/kg fresh weight No N/A GI06-F03
Foodstuffs Carrots Cobalt-60 < 0.88 Bq/kg fresh weight < 1.2 Bq/kg fresh weight 373 Bq/kg fresh weight No N/A GI06-F03
Soil Arable soil Cesium-137 7.43 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI06-S06
Soil Arable soil Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI06-S06
Soil Soil (0-5 cm) Cesium-137 2.91 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI06-S06
Soil Soil (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI06-S06
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI06-V07
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI06-V07
Water Surface Water Gross Alpha 0.09 Bq/L < 0.09 Bq/L 0.5 Bq/L No N/A GI08-W07
Water Surface Water Gross Beta 0.19 Bq/L < 0.09 Bq/L 1 Bq/L No N/A GI08-W07
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI08-W07
Water Surface Water Tritiated water 9.2 Bq/L 21.9 Bq/L 7,000 Bq/L No N/A GI08-W07
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI08-W07
Air Elemental Tritium < 2 Bq/m3 < 1.9 Bq/m3 5,100,000 Bq/m3 No N/A GI03-A03
Air Cesium-137 < 0.0001 Bq/m3 < 0.000049 Bq/m3 2.56 Bq/m3 No N/A GI03-A03
Air Tritiated water 5.57 Bq/m3 9.3 Bq/m3 340 Bq/m3 No N/A GI03-A03
Air Cobalt-60 < 0.000055 Bq/m3 0.832 Bq/m3 No N/A GI03-A03
Air Iodine-131 < 0.001 Bq/m3 < 0.0011 Bq/m3 0.228 Bq/m3 No N/A GI03-A03
Soil Arable soil Cesium-137 1.22 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI03-S03
Soil Arable soil Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI03-S03
Soil Soil (0-5 cm) Cesium-137 3.18 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI03-S03
Soil Soil (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI03-S03
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI03-V03
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI03-V03
Air Elemental Tritium < 1.9 Bq/m3 5,100,000 Bq/m3 No N/A GI02-A02
Air Cesium-137 < 0.000049 Bq/m3 0.228 Bq/m3 No N/A GI02-A02
Air Tritiated water < 1.9 Bq/m3 340 Bq/m3 No N/A GI02-A02
Air Cobalt-60 < 0.000055 Bq/m3 0.228 Bq/m3 No N/A GI02-A02
Air Iodine-131 < 0.0011 Bq/m3 0.228 Bq/m3 No N/A GI02-A02
Air Elemental Tritium < 2 Bq/m3 5,100,000 Bq/m3 No N/A GI04-A02
Air Cesium-137 < 0.0001 Bq/m3 2.56 Bq/m3 No N/A GI04-A02
Air Tritiated water < 2 Bq/m3 340 Bq/m3 No N/A GI04-A02
Air Iodine-131 < 0.001 Bq/m3 0.228 Bq/m3 No N/A GI04-A02
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI04-V05
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI04-V05
Water Surface Water Gross Alpha 0.09 Bq/L < 0.09 Bq/L 0.5 Bq/L No N/A GI04-W04
Water Surface Water Gross Beta 0.09 Bq/L < 0.09 Bq/L 1 Bq/L No N/A GI04-W04
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI04-W04
Water Surface Water Tritiated water 7.3 Bq/L 6.9 Bq/L 7,000 Bq/L No N/A GI04-W04
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI04-W04
Foodstuffs Milk Organically Bound Tritium 3.2 Bq/kg fresh weight 2,260 Bq/kg fresh weight No N/A GI05-F01
Foodstuffs Milk Cesium-137 < 0.25 Bq/kg fresh weight 25 Bq/kg fresh weight No N/A GI05-F01
Foodstuffs Milk Tritiated water 7.3 Bq/kg fresh weight 5,560 Bq/kg fresh weight No N/A GI05-F01
Foodstuffs Milk Cobalt-60 < 0.29 Bq/kg fresh weight 11 Bq/kg fresh weight No N/A GI05-F01
Water Surface Water Gross Alpha < 0.08 Bq/L 0.15 Bq/L 0.5 Bq/L No N/A GI05-W05
Water Surface Water Gross Beta 0.1 Bq/L 0.18 Bq/L 1 Bq/L No N/A GI05-W05
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI05-W05
Water Surface Water Tritiated water < 3 Bq/L < 3 Bq/L 7,000 Bq/L No N/A GI05-W05
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI05-W05
Water Surface Water Gross Alpha < 0.08 Bq/L < 0.09 Bq/L 0.5 Bq/L No N/A GI09-W01
Water Surface Water Gross Beta 0.16 Bq/L 0.11 Bq/L 1 Bq/L No N/A GI09-W01
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI09-W01
Water Surface Water Tritiated water 8.6 Bq/L < 3 Bq/L 7,000 Bq/L No N/A GI09-W01
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI09-W01
Soil Sediment Cesium-137 4.17 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI04-SE01
Soil Sediment Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI04-SE01
Vegetation Grass Cesium-137 < 4.5 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI04-V04
Vegetation Grass Cobalt-60 < 4.8 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI04-V04
Soil Arable soil Cesium-137 2.07 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI04-S04
Soil Arable soil Cobalt-60 < 0.97 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI04-S04
Soil Soil (0-5 cm) Cesium-137 1.44 Bq/kg dry weight 58.6 Bq/kg dry weight No N/A GI04-S04
Soil Soil (0-5 cm) Cobalt-60 < 1 Bq/kg dry weight 14 Bq/kg dry weight No N/A GI04-S04
Vegetation Grass Cesium-137 < 3.2 Bq/kg fresh weight 52 Bq/kg fresh weight No N/A GI04-V04
Vegetation Grass Cobalt-60 < 3.5 Bq/kg fresh weight 605 Bq/kg fresh weight No N/A GI04-V04
Water Surface Water Gross Alpha 0.08 Bq/L < 0.09 Bq/L 0.5 Bq/L No N/A GI04-W08
Water Surface Water Gross Beta < 0.08 Bq/L 0.09 Bq/L 1 Bq/L No N/A GI04-W08
Water Surface Water Cesium-137 < 0.24 Bq/L < 0.25 Bq/L 10 Bq/L No N/A GI04-W08
Water Surface Water Tritiated water 5.6 Bq/L 3.3 Bq/L 7,000 Bq/L No N/A GI04-W08
Water Surface Water Cobalt-60 < 0.28 Bq/L < 0.3 Bq/L 12.1 Bq/L No N/A GI04-W08
Foodstuffs Milk Organically Bound Tritium < 1.5 Bq/kg fresh weight 2,260 Bq/kg fresh weight No N/A GI10-F07
Foodstuffs Milk Cesium-137 < 0.3 Bq/kg fresh weight 25 Bq/kg fresh weight No N/A GI10-F07
Foodstuffs Milk Tritiated water < 2.8 Bq/kg fresh weight 5,560 Bq/kg fresh weight No N/A GI10-F07
Foodstuffs Milk Cobalt-60 < 0.3 Bq/kg fresh weight 11 Bq/kg fresh weight No N/A GI10-F07

1 The < symbol indicates that a result is below the provided laboratory analytical detection limit.

2N/A - Not available

3 For radiological parameters where no guidelines exist, CNSC reference levels were established based on conservative assumptions using CSA Standard N288.1-14. The reference level for a particular radionuclide in a particular medium (e.g., water, air, food) represents the activity concentration that would result in a dose of 0.1 mSv/a, a dose at which no health impacts are expected.

4 Tritiated water (HTO) is a radioactive form of water where the usual hydrogen atoms in H2O are replaced with tritium. Elemental tritium (HT) refers to the radioactive form of hydrogen gas.

Background

Under the Nuclear Safety and Control Act (NSCA), licensees of nuclear facilities are required to implement an environmental monitoring program to demonstrate that the public and the environment are protected from emissions related to the facility's nuclear activities. The results of these monitoring programs are submitted to the CNSC to ensure compliance with applicable guidelines and limits, as set out in regulations that oversee Canada's nuclear industry.

The CNSC has implemented its IEMP to verify that the public and the environment around licensed nuclear facilities are protected. It is separate from, but complementary to, the CNSC's ongoing compliance verification program. The IEMP involves taking samples from public areas around the facilities, and measuring and analyzing the amount of radiological (nuclear)and non-radiological substances in those samples. CNSC staff collect the samples and send them to the CNSC's state-of-the-art laboratory for testing and analysis. As part of the IEMP, the area outside of the G-2 facility site perimeter was sampled in 2015 and 2016.

2016 Results

A site-specific sampling plan was developed based on Hydro-Québec's approved environmental monitoring program and the CNSC's regulatory experience with the site. In 2016, samples were collected in publicly accessible areas outside the perimeter of the G-2 facility and included air, river water, soil, sand, grass, and foodstuff such as milk and producefrom local farms. View detailed sampling data.

The 2016 IEMP sampling plan for the G-2 facility focused on radiological contaminants. Similar to the results obtained in 2015, the measured radioactivity in air, water, soil, sand, grass as well as samples of foodstuff (milk, tomatoes, cabbage, beets and carrots) were below available guidelines and CNSC reference levels. CNSC reference levels are based on the conservative assumptions about the exposure that would result in a dose of 0.1 mSv/year, which represents one-tenth of the CNSC's public dose limit of 1 mSv/year. No health impacts are expected at this level.

2015 Results

A site-specific sampling plan was developed based on Hydro-Québec's approved environmental monitoring program and the CNSC's regulatory experience with the site. In 2015, samples were collected in publicly accessible areas outside the perimeter of the G-2 facility and included sampling of air, river water, soil, sand, vegetation, and foodstuff such as milk and producefrom local farms. View detailed sampling data.

The 2015 IEMP sampling plan for the G-2 facility focused on radiological contaminants. The measured radioactivity in air, water, soil and sand, as well as samples of foodstuff (milk, tomatoes, carrots and blueberries), and grass were below available guidelines and CNSC reference levels. CNSC reference levels are based on the conservative assumptions about the exposure that would result in a dose of 0.1 mSv/year, which represents one-tenth of the CNSC's public dose limit of 1 mSv/year. No health impacts are expected at this level.

Conclusions

The IEMP results indicate that the public and the environment around the G-2 facility are protected, and that there are no expected health impacts. These results are consistent with the results submitted by Hydro-Québec, demonstrating that the licensee's environmental protection program protects the health and safety of people and the environment.