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Environmental Monitoring

Airborne and liquid wastes discharged from a fuel fabrication facility like BWXT are regulated by concentration limits. We’ve established our own limits at just a fraction of the regulatory limits, to keep public exposure to any radiation as low as possible.

At BWXT Nuclear Energy Canada Inc. Toronto, we perform both continuous in-stack sampling and boundary air monitoring. Boundary samples are high volume air samples drawn at five positions around the Toronto facility perimeter. The latest stack sampling results are as follows:

TORONTO STACK 2013
Number of samples exceeding 1 μg U/m3 action level 0
Average concentration (μg U/m3) 0.002
Highest value recorded (μg U/m3) 0.62
Total discharge to air (g U) 5.8

All regulatory levels for Canada are contained in the body of the BWXT environmental report; however, to make this information accessible, we also have provided it below. The relevant standards are as follows:

Licence discharge limit (Toronto sewer): 9000 kg/year
Licence discharge limit (Toronto air): 760 g/year

The licence limits are 1/20 of the regulatory limit for any member of the public.

Water is used in the production process and to clean protective clothing, walls, and floors, and for various other janitorial functions. The water is treated to remove uranium dioxide and the concentration of any uranium dioxide in the wastewater leaving the treatment system is measured. The latest water effluent sampling results are as follows:

TORONTO WATER 2013
Number of samples exceeding 6 ppm batch release action level 0
Average uranium concentration in water (ppm) 0.76
Highest uranium concentration in water (ppm) 2.70
Total discharge to sewer (kg U) 0.83


Note:
Uranium in water concentrations and water discharge quantities are both subject to normal variations from year to year depending on production activities and also cleaning and maintenance activities occurring during a given year.

At BWXT Nuclear Energy Canada Inc. Peterborough, we perform in-stack sampling. Due to the nature of the process and stack sample results to-date, boundary monitoring is not required. The latest stack sampling results are as follows:

PETERBOROUGH STACK 2013
Number of samples exceeding 1 μg U/m3 action level 0
Average concentration (μg U/m3) 0.0012
Highest value recorded (μg U/m3) 0.0046
Total discharge to air (g U) 0.0132

All regulatory levels for Canada are contained in the body of the BWXT environmental report; however, to make this information accessible, we also have provided it below. The relevant standards are as follows:

Licence discharge limit (Peterborough sewer): 760 kg/year
Licence discharge limit (Peterborough air): 550 g/year

The licence limits are 1/20 of the regulatory limit for any member of the public.

The latest water effluent sampling results are as follows:

PETERBOROUGH WATER 2013
Number of samples exceeding 6 ppm batch release action level 0
Average uranium concentration in water (ppm) 0.29
Highest uranium concentration in water (ppm) 0.46
Total discharge to sewer (g U) 0.24

Radiation doses to a member of the public from both the air and water emissions are negligible. Additional information on environmental performance for both the Toronto and Peterborough facilities can be found in the latest Annual Compliance Report*.

*Worker safety report is available on request.