Presentation is loading. Please wait.

Presentation is loading. Please wait.

Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident Environmental Health Services (EHS) British.

Published byBryan Morris Modified over 8 years ago

Similar presentations

Presentation on theme: "Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident Environmental Health Services (EHS) British."— Presentation transcript:

1 Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident Environmental Health Services (EHS) British Columbia Centre for Disease Control (BCCDC) 1

2 1.ANALYSIS OF DRINKING WATER IN BC :  VANCOUVER:  CAPILANO INTAKE  SEYMOUR INTAKE  COQUITLAM INTAKE  VICTORIA Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident

3 -Testing for radioactivity in drinking water was carried out after the Fukushima nuclear incident by Metro Vancouver for the Vancouver area and Capital Regional District Water Services (CRD) for Victoria. The results of the assays are posted on their respective websites 1. -The tests included the measurement of natural Gamma emitters based on radioactive decay of uranium and thorium series, artificial Gamma radionuclides (Cesium-134, Cesium-137, Iodine-131) and Gross Alpha & Gross Beta. -Most of the results were below the limits of detection of the radiation-measuring systems. These limits depend on the radiation background at the time of measurement and differ from one radionuclide to another. The limits of detection as reported by the labs ranged from 0.01 to 0.02 Bq/L for Alpha & Beta emitters and 0.02 to 0.9 Bq/L for Gamma emitters. -No measurable radioactivity from Fukushima was detected in drinking water supplied by Metro Vancouver plants: Capilano, Seymour, and Coquitlam. -Results from Metro Vancouver are shown on Figures 1, 2, and 3 and from CRD/Victoria on Figure 4 -The Canadian Action Levels for drinking water 2 (see Table 1) are: 100 Becquerels per liter for Gamma emitters (Cs-134, Cs-137, I-131…) 1 Becquerel per liter for Alpha emitters (Plutonium isotopes and Americium-241) -The absence of measurable activities of important Gamma emitters from nuclear reactors such as Cesium-137, Cesium-134, Iodine-131 suggests that the traces of Alpha and Beta radioactivity found in the water samples are most probably due to natural radioactivity (Uranium and Thorium decay chains). 1 Metro Vancouver: http://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspxhttp://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspx Victoria: http://www.crd.bc.ca/waterquality/radiationtesting.htmhttp://www.crd.bc.ca/waterquality/radiationtesting.htm 2 single action level for each radionuclide - Ref: Canadian Guidelines for the Restriction of Radioactively Contaminated Food and Water Following a Nuclear Emergency – Health Canada, 2000, http://www.hc-sc.gc.ca/ewh-semt/alt_formats/hecs-sesc/pdf/pubs/contaminants/emergency-urgence/01_254_hecs-sesc-eng.pdf

4 Table 1 - Canadian Guidelines for the Restriction of Radioactively Contaminated Food and Water Following a Nuclear Emergency – Health Canada, 2000

5 CAPILANO INTAKE - 2011 Figure 1. ANALYSIS OF DRINKING WATER – CAPILANO INTAKE - 2011 Source of raw data: Metro Vancouver http://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspx 100 Bq/liter: Health Canada Limit for each Gamma Emitter (Cs-134, Cs-137, I-131) 1Bq/liter: Health Canada Limit for each element: Pu-238, Pu-239, Pu-240, Pu-242, Am-241

6 SEYMOUR INTAKE - 2011 Figure 2. ANALYSIS OF DRINKING WATER – SEYMOUR INTAKE - 2011 Source of raw data: Metro Vancouver http://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspx 100 Bq/liter: Health Canada Limit for each Gamma Emitter (Cs-134, Cs-137, I-131) 1Bq/liter: Health Canada Limit for each element: Pu-238, Pu-239, Pu-240, Pu-242, Am-241

7 COQUITLAM INTAKE - 2011 Figure 3. ANALYSIS OF DRINKING WATER – COQUITLAM INTAKE - 2011 Source of raw data: Metro Vancouver http://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspx 100 Bq/liter: Health Canada Limit for each Gamma Emitter (Cs-134, Cs-137, I-131) 1Bq/liter: Health Canada Limit for each element: Pu-238, Pu-239, Pu-240, Pu-242, Am-241

8 VICTORIA, BC - 2011 Figure 4. ANALYSIS OF DRINKING WATER – VICTORIA, BC - 2011 100 Bq/liter: Health Canada Limit for each Gamma Emitter (Cs-134, Cs-137, I-131) 1Bq/liter: Health Canada Limit for each element: Pu-238, Pu-239, Pu-240, Pu-242, Am-241 Source of raw data: Metro Vancouver http://www.metrovancouver.org/services/water/qualitytreatment/Pages/Radionuclidemonitoring.aspx

9 2. Air Dose Rates (μSv/Day) Abbotsford Burnaby Kamloops Kelowna Port Hardy Prince George Prince Rupert Tofino Victoria Vancouver Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident

10 -Health Canada routinely monitors Gamma radiation levels in air by means of sensitive monitoring stations located across Canada. -Following the Fukushima nuclear incident, additional monitoring stations were added in BC. -From March to September 2011, dose rate ( in (µSv/day) readings 3 were recorded by Health Canada at 10 locations in British Columbia: Abbotsford, Burnaby, Kamloops, Kelowna, Port Hardy, Prince George, Prince Rupert, Tofino, Victoria, and Vancouver. -A set of data for the period March-September 2011 is available at Health Canada’s website: http://www.hc-sc.gc.ca/hc-ps/ed-ud/respond/nuclea/data-donnees-eng.php#tphp http://www.hc-sc.gc.ca/hc-ps/ed-ud/respond/nuclea/data-donnees-eng.php#tphp -A summary of Health Canada’s data for the 10 BC locations is shown on Figure 5. -The highest air dose rate recorded in 2010 before the Fukushima nuclear incident was 0.97 μSv/Day. The highest dose rate recorded in 2011 in BC was 0.93 μSv/Day. -The readings show no appreciable increase in radiation levels over “normal day-to-day fluctuations”, as stated by Health Canada. 3 From March 11 to end of April, 2011: Daily Average and From May 4 to September 7, 2011: Weekly Average

11 Raw data from Health Canada: http://www.hc-sc.gc.ca/hc-ps/ed-ud/respond/nuclea/data-donnees-eng.php#fpnhttp://www.hc-sc.gc.ca/hc-ps/ed-ud/respond/nuclea/data-donnees-eng.php#fpn MAXIMUM 2010 (0.97) MAXIMUM 2011 (0.93)

12 3. Health Canada’s Fixed Point Surveillance (FPS) network monitors: Vancouver Island System – Comparison of 2010 and 2011 radiation Levels From Health Canada 4 : -The Fixed Point Surveillance network monitors public radiation dose due to radioactive materials in the atmosphere. - It 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 5. 4 http://www.hc-sc.gc.ca/ewh-semt/contaminants/radiation/surveill/data-donnees/data-donnees-2010 eng.php http://www.hc-sc.gc.ca/ewh-semt/contaminants/radiation/surveill/data-donnees/data-donnees-2010 eng.php KERMa 5 Kerma is the acronym for “Kinetic Energy Released in Matter”. It is the radiation absorbed dose in air, expressed in units of Grays (Gy). Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident

13 The minimum detectable doses 6 for the three noble gases Argon-41, Xenon-133, Xenon-135 are: The FPS system monitors the following locations in British Coliumbia: SAANICH METCHOSIN VICTORIA NANAIMO SIDNEY Figures 6, 7, 8, 9, and 10 show the monthly variations of the radiation levels in air in 2010 and 2011 at the 5 locations. The acceptable public dose limit 7 set by the Canadian Nuclear Safety Commission (CNSC) is 10 6 nGy/month. Argon-416 nGy/month Xenon-1333 nGy/month Xenon-1353 nGy/month 6 Health Canada: http://www.hc-sc.gc.ca/ewh-semt/contaminants/radiation/surveill/data-donnees/data-donnees-2010-eng.php http://www.hc-sc.gc.ca/ewh-semt/contaminants/radiation/surveill/data-donnees/data-donnees-2010-eng.php 7 Source: http://laws-lois.justice.gc.ca/eng/regulations/SOR-2000-203/page-1.html#ordhttp://laws-lois.justice.gc.ca/eng/regulations/SOR-2000-203/page-1.html#ord

14 JAN FEB MAR APR MAY JUN JUL AUGSEP OCT NOVDEC FOR SAANICH: Canadian acceptable public dose limit - The recorded radiation levels in units of nanoGray/month are far below the Canadian acceptable public dose limit of 1,000,000 nGy/month - No Ar-41, Xe-133, or Xe-135 detected (Below Detection Limit) Saanich - The Figure shows the variations of the total Air Kerma in Saanich during 2010 (before the Fukushima nuclear incident ) and 2011 (after the incident). - Monthly variations in 2010 and 2011 are similar - There was no radiation spike in 2011above the 2010 background

15 JAN FEB MAR APR MAY JUN JUL AUGSEP OCT NOVDEC FOR METCHOSIN FOR METCHOSIN: Canadian acceptable public dose limit - Radiation levels are far below the Canadian acceptable public dose limit of 1,000,000 nGy/month - No Ar-41, Xe-133, or Xe-135 detected (Below Detection Limit) - Monthly variations in 2010 and 2011 are similar - No radiation spike in 2011 above the 2010 background

16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC FOR VICTORIA FOR VICTORIA: Canadian acceptable public dose limit - Radiation levels are far below the Canadian acceptable public dose limit of 1,000,000 nGy/month - Recorded radiation levels in 2011 and 2011 were extremely low - Monthly variations in 2010 and 2011 are similar - No radiation spike in 2011 above the 2010 background

17 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC FOR NANAIMO FOR NANAIMO: Canadian acceptable public dose limit - Radiation levels are far below the Canadian acceptable public dose limit of 1,000,000 nGy/month - No Ar-41, Xe-133, or Xe-135 detected (Below Detection Limit) -The monthly variations in 2010 and 2011 are similar - No radiation spike in 2011 above the 2010 background

18 FOR SIDNEY FOR SIDNEY: Canadian acceptable public dose limit - Radiation levels far below the Canadian acceptable public dose limit of 1,000,000 nGy/month - No Ar-41, Xe-133, or Xe-135 detected (Below Detection Limit) - Monthly variations in 2010 and 2011 are similar - No radiation spike in 2011 above the 2010 background JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

19 3. CONCLUSIONS: 1.Radiation monitoring of water and air was conducted after the Fukushima nuclear incident at several locations in British Columbia. The results of the tests for radionuclides in water by Metro Vancouver and Capital Regional District Water Services (CRD) of Victoria did not reveal radioactivity at a level of concern 2.The testing for the main reactor Gamma emitters, i.e. Cs-134, Cs-137, I-131 showed no presence of these radionuclides above the instrument detection limit. 3.The traces of Alpha and Beta elements measured in water were most probably due to the presence of natural radioactivity (uranium and thorium decay chains). 4.The air Gamma dose rates recorded by Health Canada during the period March-September 2011 and compared to the 2010 levels showed no sensitive increase of radiation levels in the Province of British Columbia. 5.The radiation levels recorded by the US EPA/RADNET 8 at different locations of the West Coast of the United States after the Fukushima nuclear incident show no sensitive increase of radiation in 2011. 6.Additional information on the present status of the Fukushima nuclear power plant available at the International Atomic Energy Agency (IAEA) website. 9 8 RadNet Monitoring System Data Sources: http://www.epa.gov/radnet/radnet-data/online-data.html 9 Fukushima Daiichi Status Report http://www.iaea.org/newscenter/focus/fukushima/statusreport230212.pdf

Download ppt "Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident Environmental Health Services (EHS) British."

Similar presentations

PUBLIC DOSES ESTIMATION BASED ON EFFLUENTS DATA AND DIRECT MEASUREMENTS OF TRITIUM IN ENVIRONMENTAL SAMPLES AT CERNAVODA E. Bobric, I. Popescu, V. Simionov.

PUBLIC DOSES ESTIMATION BASED ON EFFLUENTS DATA AND DIRECT MEASUREMENTS OF TRITIUM IN ENVIRONMENTAL SAMPLES AT CERNAVODA E. Bobric, I. Popescu, V. Simionov.
1 Radiological protection, dosimetry & environmental monitoring National Training Course on Radiopharmacy, Radiochemistry and Radioisotope Production Site.

1 Radiological protection, dosimetry & environmental monitoring National Training Course on Radiopharmacy, Radiochemistry and Radioisotope Production Site.
3/2003 Rev 1 I.4.1 – slide 1 of 33 Part I Review of Fundamentals Module 4Sources of Radiation Session 1Terrestrial Radionuclides Module I.4.1 IAEA Post.

3/2003 Rev 1 I.4.1 – slide 1 of 33 Part I Review of Fundamentals Module 4Sources of Radiation Session 1Terrestrial Radionuclides Module I.4.1 IAEA Post.
Radiological Assessment - of effects from - Fukushima Daiichi Nuclear Power Plant May 6, 2011.

Radiological Assessment - of effects from - Fukushima Daiichi Nuclear Power Plant May 6, 2011.
Andy Wood Univ. of Washington Dept. of Civil & Envir. Engr. Statistics related to the merging of short and long lead precipitation predictions in the continental.

Andy Wood Univ. of Washington Dept. of Civil & Envir. Engr. Statistics related to the merging of short and long lead precipitation predictions in the continental.
Line Efficiency     Percentage Month Today’s Date

Line Efficiency     Percentage Month Today’s Date
Chapter 16 1. All matter is made up of atoms. Parts of an atom: 1. Nucleus – the center of an atom. Proton – Positively charged. ( + ) Neutron – have.

Chapter All matter is made up of atoms. Parts of an atom: 1. Nucleus – the center of an atom. Proton – Positively charged. ( + ) Neutron – have.
Radiological Assessment - of effects from - Fukushima Daiichi Nuclear Power Plant May 13, 2011.

Radiological Assessment - of effects from - Fukushima Daiichi Nuclear Power Plant May 13, 2011.
Unit Number Oct 2011 Nov 2011 Dec 2011 Jan 2012 Feb 2012 Mar 2012 Apr 2012 May 2012 Jun 2012 Jul 2012 Aug 2012 Sep 2012 1 2 3 4 5 6 (3/4 Unit) 7 8 Units.

Unit Number Oct 2011 Nov 2011 Dec 2011 Jan 2012 Feb 2012 Mar 2012 Apr 2012 May 2012 Jun 2012 Jul 2012 Aug 2012 Sep (3/4 Unit) 7 8 Units.
HOW TO MAKE A CLIMATE GRAPH CLIMATE GRAPHING ASSIGNMENT PT.2.

HOW TO MAKE A CLIMATE GRAPH CLIMATE GRAPHING ASSIGNMENT PT.2.
IAEA Natural Terrestrial Radiation Day 3 – Lecture 7 Sources of Radiation 1.

IAEA Natural Terrestrial Radiation Day 3 – Lecture 7 Sources of Radiation 1.
Radiation occurs in nature…the earth is ‘bathed’ in radiation from a variety of sources. Humans have evolved with these levels of radiation in the environment.

Radiation occurs in nature…the earth is ‘bathed’ in radiation from a variety of sources. Humans have evolved with these levels of radiation in the environment.
Northwest Area Committee Meeting June 29, 2011 C. Terada, EPA Japan 2011 US National Radiation Monitoring.

Northwest Area Committee Meeting June 29, 2011 C. Terada, EPA Japan 2011 US National Radiation Monitoring.
Jed Harrison Office of Radiation & Indoor Air.  Review the Incident – What Happened  Describe the EPA Response  Review EPA’s RadNet Monitoring System.

Jed Harrison Office of Radiation & Indoor Air.  Review the Incident – What Happened  Describe the EPA Response  Review EPA’s RadNet Monitoring System.
EPA’s Response to Fukushima Japan Nuclear Emergency Mike Boyd, Senior Health Physicist EPA/Office of Radiation & Indoor Air Presented at 2011 OAS Annual.

EPA’s Response to Fukushima Japan Nuclear Emergency Mike Boyd, Senior Health Physicist EPA/Office of Radiation & Indoor Air Presented at 2011 OAS Annual.
Food Monitoring for the US  How low should we go - FDA limit for US  Bye-Bye Becquerels Is there radiation in the food? Ami is 10 and lives in Yanaizu,

Food Monitoring for the US  How low should we go - FDA limit for US  Bye-Bye Becquerels Is there radiation in the food? Ami is 10 and lives in Yanaizu,
IONISING RADIATION PUT TO USE 18.1. Modelling radioactive decay 18.1 Ionising radiation put to use.

IONISING RADIATION PUT TO USE Modelling radioactive decay 18.1 Ionising radiation put to use.
The political aspects of monitoring radioactive materials in the environment of our region E. Wirth, M Zähringer Federal Office for Radiation Protection,

The political aspects of monitoring radioactive materials in the environment of our region E. Wirth, M Zähringer Federal Office for Radiation Protection,
Radiation in Your Environment. Radiation Around You Nature –Cosmic (direct and cosmic-produced radioactivity –Terrestrial (including radon) Medical Consumer.

Radiation in Your Environment. Radiation Around You Nature –Cosmic (direct and cosmic-produced radioactivity –Terrestrial (including radon) Medical Consumer.
Fundamentals of Radiation

Fundamentals of Radiation

Similar presentations

Ads by Google