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2011 Dose Data from the Fixed Point Surveillance Network

The Fixed Point Surveillance (FPS) network monitors public radiation dose due to radioactive materials in the atmosphere. The FPS network is used primarily to measure the external dose from three noble gases in particular; Argon-41, Xenon-133 and Xenon-135, as well as the total combined external dose from all sources, measured as Total Air KERMA.

Gentilly System - 2011

Gentilly System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Leprad Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 16474 14090 15246 18368 19814 19400 20143 20212 19808 20474 20164 19769
Boulevard Alphonse-Deshaies Argon-41 x x x x - - - - - - - -
Xenon-133 x x x x - - - - - - - -
Xenon-135 x x x x - - - - - - - -
Total Air KERMA x x x x 18673 18524 19283 19325 18945 19211 18404 16650
Port Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 7525 6491 6861 8662 9024 9030 9699 9853 9736 9771 10008 9870
Victoriaville Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 16422 12441 14277 18004 19455 18915 20056 20097 19506 19672 19191 19527
Trois Rivières Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 7441 6153 6209 9192 11055 10925 11459 11676 11268 11078 11120 11325
Québec City Argon-41 x x x x - - - - - - - -
Xenon-133 x x x x - - - - - - - -
Xenon-135 x x x x - - - - - - - -
Total Air KERMA x x x x 8668 8299 8962 9007 8775 8821 8929 9049
Batiscan Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14430 10380 7587 16446 25741 25457 25985 26178 25905 26105 25420 24634
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Bruce System - 2011

Bruce System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Site Boundary Argon-41 - - - - 7 - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11792 8472 12070 15164 15710 15416 17161 17534 17179 17436 16517 16497
Scott Point Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 9720 7160 9497 11341 11697 11500 12688 13349 13478 13618 12923 12906
Kincardine Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 9585 7916 10880 11335 11591 11373 12366 12596 12463 12895 12292 12613
Inverhuron Argon-41 - - - - 6 - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 10015 6938 9104 11627 12088 12006 12876 13091 13133 13758 13145 13260
Port Elgin Argon-41 - - - - - - - - x - - -
Xenon-133 - - - - - - - - x - - -
Xenon-135 - - - - - - - - x - - -
Total Air KERMA 7971 6014 8393 11186 11481 11188 11998 12247 x 12832 12381 12373
Infocentre Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 15165 11650 16698 18833 19406 19057 21746 22428 21922 21570 20265 20261
Tiverton Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 10441 7250 10918 14830 15447 15326 17095 17473 17406 17341 16458 16316
Shore Road Argon-41 - - - - - 12 11 - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 9595 6716 8505 11507 12057 11831 13243 13653 13725 13900 12984 12954
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Greater Toronto Area System - 2011

Greater Toronto Area System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Scarborough Argon-41 - - - - 8 - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 10196 8982 10694 10521 11114 10679 11429 11915 11877 11956 11734 11807
Bowmanville Argon-41 - - x - - - - - - - - -
Xenon-133 - - x - - - - - - - - -
Xenon-135 - - x - - - - - - - - -
Total Air KERMA 15296 12542 x 17349 18138 17063 18659 18371 18451 18065 17701 17865
Resources Road Argon-41 - - - - - x x x - - - -
Xenon-133 - - - - - x x x - - - -
Xenon-135 - - - - - x x x - - - -
Total Air KERMA 7916 6777 8103 8166 8605 x x x 11148 11342 10985 10574
St. Clair Avenue East Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11580 10139 12482 12299 13045 12372 13337 13683 13843 13752 13310 13543
Pickering Argon-41 - - - - 21 - 13 13 8 - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14928 12877 15706 15721 16477 16065 17479 17464 17314 17212 16707 16889
Oshawa Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14261 12204 14895 14886 15586 14521 15644 15652 15529 15423 15131 15325
Markham Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 15425 13496 16279 16255 17091 16695 17930 18016 17979 17890 17288 17292
Ajax Argon-41 24 8 - 11 15 - 18 17 7 - - 10
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 19940 17056 21477 21374 22194 22290 25442 24796 24223 23444 22633 22867
Port Hope Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 16008 14077 17470 17245 18103 17656 19334 19023 18260 18403 17759 18490
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Darlington System - 2011

Darlington System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Blue Circle Cement Argon-41 - - 8 - 13 - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11998 9491 13292 13881 14703 14433 15862 15581 15797 15405 14962 15040
Bowmanville Argon-41 - - 12 - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 15260 11982 16716 17472 18214 18175 20285 19615 19439 19147 18804 18841
Site #3 Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 16083 10535 16480 19310 20247 19872 21560 21274 21171 20744 20220 20270
Site #4 Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14193 10631 14883 16203 17124 16226 18023 17703 17771 17314 16940 16889
Site #5 Argon-41 - - - - - - 10 - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 12684 10026 14277 15247 15944 15448 16464 16478 16623 16503 16141 16282
Site #6 Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 17626 13481 18314 19374 20137 20042 22649 22378 22384 21230 20547 20647
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Pickering System - 2011

Pickering System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Montgomery Road Argon-41 152 144 10 108 269 101 215 197 101 - 223 139
Xenon-133 4 8 - - 4 - - - - - - -
Xenon-135 5 5 11 14 15 4 6 18 23 19 68 13
Total Air KERMA 13357 10448 14646 15554 16373 15997 18163 17948 17719 16972 16844 16582
Kinsmen Park Argon-41 94 28 10 64 219 57 139 227 80 - 23 38
Xenon-133 - - - - 3 - - - - - - -
Xenon-135 - - - - 3 - - 4 4 5 - -
Total Air KERMA 13464 10959 15101 15200 15896 15558 17805 17851 17643 16857 16162 16242
Liverpool Road Argon-4 35 10 7 47 154 22 72 128 50 - 6 28
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 13887 11205 15195 15561 16165 15623 17503 17558 17525 17130 16509 16715
East Boundary Argon-41 202 81 - 77 88 26 80 119 43 - 54 53
Xenon-133 5 3 - - 4 - - - 4 - - -
Xenon-135 10 12 6 7 6 - - 8 9 18 17 14
Total Air KERMA 18433 14887 20061 20656 21522 21078 23275 23132 22847 22407 21873 22089
Central Maintenance Argon-41 90 28 7 162 461 65 296 353 122 - 83 25
Xenon-133 - - - 4 8 - 3 4 - - - -
Xenon-135 - - - 3 4 - - 5 3 7 9 -
Total Air KERMA 10338 8391 11362 11812 12721 12017 13515 13388 13266 12846 12578 12644
Beachpoint Promenade Argon-41 13 9 9 70 190 17 48 136 35 7 - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - 3 - - - - - 3 - -
Total Air KERMA 9915 7631 10711 11294 12031 11136 11839 12632 12629 12658 12361 12510
Petticoat Creek Argon-41 11 - - 51 147 15 32 62 25 - 6 -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14119 12344 14262 15952 16942 17393 20265 20337 20085 19853 18322 17241
CMS Storage Yard Argon-41 105 72 16 211 540 111 468 330 168 7 307 85
Xenon-133 -   - 5 10 - 6 5 - - 5 -
Xenon-135 4 - 4 7 6 - - 15 9 13 27 -
Total Air KERMA 9428 7846 9635 9723 10537 9790 11045 11157 10563 10281 10358 10181
Alex Robertson Road Argon-41 59 19 - 45 165 46 116 178 76 - 13 27
Xenon-133 - 3 - - - - - - - - - -
Xenon-135 - - - - - - - - - 3 - -
Total Air KERMA 17204 12648 17804 19921 20768 20453 23826 23484 23263 22542 21576 21374
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Ottawa Valley System - 2011

Ottawa Valley System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Chapeau Argon-41 240 87 166 177 25 143 223 92 110 104 43 127
Xenon-133 10 5 7 4 - - 21 8 6 4 - 5
Xenon-135 7 3 25 5 - - 16 5 3 - - 11
Total Air KERMA 16617 12969 13321 19649 21571 22199 22968 23751 22010 22403 21633 20635
Chalk River Argon-41 x x 109 297 193 101 38 119 345 41 194 126
Xenon-133 x x 5 8 10 - - 5 16 - 10 8
Xenon-135 x x 4 23 - - - - 7 4 7 7
Total Air KERMA x x 24337 28151 30328 29884 30583 31280 30576 31151 30196 28812
Deep River Argon-41 1549 985 1853 951 600 1187 1167 895 1234 2041 1132 850
Xenon-133 96 83 86 35 34 42 98 75 54 85 46 58
Xenon-135 61 98 54 43 7 38 64 89 14 79 23 44
Total Air KERMA 26037 21493 23645 27870 30020 30563 31418 32148 31788 33105 31000 30316
Ottawa Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11260 9612 11055 12231 12638 12339 13001 13158 12963 13576 12937 12825
Petawawa Argon-41 202 263 253 64 235 99 204 201 158 170 89 167
Xenon-133 11 13 11 8 14 - 14 6 6 8 6 8
Xenon-135 - 4 - 28 - - 5 - - - 4 11
Total Air KERMA 15323 12431 13725 18627 20344 20009 20747 21165 20568 21358 20442 20012
Sheenboro Argon-41 708 444 647 762 126 398 1130 424 348 468 217 361
Xenon-133 45 24 30 27 8 9 62 24 18 27 14 21
Xenon-135 16 10 29 43 - - 24 10 8 4 11 18
Total Air KERMA 17308 13842 14730 20145 21649 21723 22958 23222 22343 22593 21928 21347
Westmeath Argon-41 64 13 35 23 - 21 73 18 15 20 8 41
Xenon-133 - - - - - - - - - - - 5
Xenon-135 - - 7 - - - - - - - - 5
Total Air KERMA 16301 13273 13720 18420 21195 21514 22498 23055 22521 22667 21888 20880
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the ;Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Regional System - 2011

Regional System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Amherstburg Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 16006 12787 16315 16171 16793 16888 16006 12787 16315 18085 17538 17518
Vancouver Argon-41 - - - - - - 8 43 9 7 14 -
Xenon-133 - - 24 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 13484 12170 13494 12964 13471 12901 13214 13592 13250 13428 13408 13328
Yellowknife Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 20914 17452 17738 17145 25944 27107 27744 27640 26807 27793 22080 19598
Regina Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 15001 11673 11452 14489 24504 23786 26626 28236 27268 28130 24589 24793
Calgary Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14460 12490 14099 13021 14697 14002 14732 14986 14437 15244 14512 14178
Winnipeg Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 10334 9177 9945 11375 11988 11629 12483 13042 13099 13549 13284 12860
Thunder Bay Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 12727 11810 13138 13501 14135 13869 14778 15189 14837 15507 15062 14707
Montréal Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 13288 11808 13103 13505 14297 13657 14177 14427 14050 14242 14000 14417
Charlottetown Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 14697 12008 15003 16158 16594 16243 17325 17055 16672 17468 16590 17020
St. John's Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 19320 12995 17529 19334 20365 19590 20772 20825 20402 20365 19131 19941
Whitehorse Argon-41 x x x x x x x x - - - -
Xenon-133 x x x x x x x x - - - -
Xenon-135 x x x x x x x x - - - -
Total Air KERMA x x x x x x x x 25369 26446 24687 19858
Iqaluit Argon-41 x x x x x x x x - - - -
Xenon-133 x x x x x x x x - - - -
Xenon-135 x x x x x x x x - - - -
Total Air KERMA x x x x x x x x 30790 28093 24810 23200
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Point Lepreau System - 2011

Point Lepreau System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Lighthouse Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 21883 16777 22765 24072 24660 24554 24865 25474 25846 25622 24392 25496
Digby Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 33322 29048 33504 32879 33878 33015 34501 34441 33342 34664 33326 34487
Dipper Harbour Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 23026 15469 21193 26356 28647 28768 29313 28843 28176 28858 28107 29039
Emergency Centre Argon-41 - - - - - - x - - - - -
Xenon-133 - - - - - - x - - - - -
Xenon-135 - - - - - - x - - - - -
Total Air KERMA 25673 12968 19694 35578 42399 41657 x 43519 43082 43038 40057 42096
Saint John Argon-41 - - x - - - - - - - - -
Xenon-133 - - x - - - - - - - - -
Xenon-135 - - x - - - - - - - - -
Total Air KERMA 19838 16094 x 20615 21315 20648 21654 21541 20751 21756 20910 21917
Welch Cove Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 13764 9239 13709 16155 16513 17063 18285 17792 17608 18005 16581 17317
Kingston Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 17058 12854 17643 18391 18965 18965 19682 19493 18876 19638 18288 19277
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Vancouver Island System - 2011

Vancouver Island System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Saanich Argon-41 - - - - - - - - - - - -
Xenon-133 - - 22 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11002 9576 10500 9920 10411 10199 10688 10833 10656 10832 10488 10610
Metchosin Argon-41 - - - - - - - - - - - -
Xenon-133 - - 20 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 8694 7466 8208 7692 8192 8101 8586 8722 8613 8524 8272 8274
Victoria Argon-41 - - - - - - - - - - - -
Xenon-133 - - 26 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 7640 6691 7259 6827 7207 6850 7104 7158 7133 7322 7394 7476
Nanaimo Argon-41 - - - - - - - - - - - -
Xenon-133 - - 21 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 11175 10042 11202 10351 10768 10322 10670 10660 10523 10808 10783 10784
Sidney Argon-41 - - - - - - - - - - - -
Xenon-133 - - 21 - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 12156 10609 11690 10896 11623 11644 12410 12645 12341 12159 11768 11875
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

Halifax System - 2011

Halifax System - 2011 - Dose Data (nGy/month)
Station Nuclide JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
West Street Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 24923 x 25136 24886 25497 24438 25283 25213 24555 26353 24700 25761
Dartmouth Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 22740 18812 22887 22755 23223 22761 24264 24011 23400 24369 22622 23578
Cole Harbour Road Argon-41 - - - - - - - - - - - -
Xenon-133 - - - - - - - - - - - -
Xenon-135 - - - - - - - - - - - -
Total Air KERMA 22617 18089 22867 22920 23281 22919 24350 24157 23690 24512 22723 23661
nGy (nanoGray)

A Gray (Gy) is a standard unit of measurement for radiation dose, defined as 1 Joule of energy deposited per kilogram of matter. A nanoGray (nGy) is 1×10-9 Grays and it is a much more common unit of measure for these types of very low doses.

KERMA (Kinetic Energy Released in Matter)

In this case the 'Total Air KERMA' refers to the radiation dose from all external gamma sources, not just from the three noble gases Argon-41, Xenon-133 and Xenon-135. This includes natural background radiation as well, such as from mineral deposits in the ground, radon gas in the air or cosmic radiation from space.

- (hyphen)

The system has a limit on the amount of low-level radiation it can reliably detect and use to calculate a monthly dose and the hyphens represent any data which falls below this detection limit. The minimum detectable dose for the three noble gases being monitored are...

  • 6 nGy/month for Argon-41
  • 3 nGy/month for Xenon-133
  • 3 nGy/month for Xenon-135

These detection limits are well below the acceptable public dose limit of 1,000,000 nGy/year as published by the Canadian Nuclear Safety Commission in their Radiation Protection Regulations.

x

The dose data for this month was not collected due to a problem with the equipment or data transfer.

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