{"id":5296,"date":"2023-09-05T14:15:52","date_gmt":"2023-09-05T20:15:52","guid":{"rendered":"https:\/\/www.crpa-acrp-bulletin.ca\/?p=5296"},"modified":"2023-09-05T14:15:52","modified_gmt":"2023-09-05T20:15:52","slug":"est-ce-que-la-recente-menace-radioactive-daustralie-pourrait-se-produire-au-canada","status":"publish","type":"post","link":"https:\/\/www.crpa-acrp-bulletin.ca\/fr\/2023\/09\/05\/est-ce-que-la-recente-menace-radioactive-daustralie-pourrait-se-produire-au-canada\/","title":{"rendered":"Est-ce que la r\u00e9cente menace radioactive d\u2019Australie pourrait se produire au Canada ?"},"content":{"rendered":"

\u00a0\"Green<\/h4>\n

Note:<\/strong> This article was originally published in Healthy Debate<\/em>. Republished under the creative commons licence with minor revisions approved by the author.<\/p>\n

<\/a><\/p>\n

\n

\n<\/div>\n

The massive search in\u00a0Western Australia<\/a> in February 2023 for a highly radioactive ceramic disc that had fallen off a truck drew worldwide attention. Amazingly, the cylindrical capsule, about half the size of a dime across and five stacked dimes high, was found. Could a similar incident happen in Canada?<\/p>\n

The disc fell out of a fixed radioactive gauge device somewhere along its more than 1,300\u00a0km truck ride from a Rio Tinto mine site in Newman en route to Perth. It is believed\u00a0that vibrations from the truck ride loosened an outer screw on the device, allowing the capsule to drop out of the screw hole and onto the road.<\/p>\n

The tiny capsule was found using a gamma-ray detector while driving slowly along the road. Australian government\u00a0officials\u00a0described it as trying to find a needle in a haystack<\/a>.<\/p>\n

Standing one metre away from the radioactive capsule for one hour would expose a person to the same amount of radiation as about one year of average natural background radiation in Canada. However, according to an ABC News report, Angela Di Fulvio, an assistant professor of nuclear engineering at the University of Illinois Urbana-Champaign, said, \u201cprolonged close exposure to the capsule \u2013 for instance, if someone picked it up and put it in their pocket \u2013 could cause severe, and even potentially deadly, health effects within hours.\u201d<\/p>\n

In1999, a welder at the Yanango hydroelectric plant<\/a> in Peru experienced awful health effects similar to those described by Di Fulvio above. The welder picked up what looked like a metal pellet attached to a braided steel cable. Not realizing what it was, the welder put the object in his right back pocket and continued to work. What he had picked up was, in fact, a highly radioactive industrial radiography source that had come out of its protective housing. Although the radioactive source was in the welder\u2019s pocket for only about 6 1\/2 hours, his fate was sealed. Despite six months of hospitalization and intense supportive care, the welder suffered progressive ulceration and infections in his right thigh and eventually had to have his leg amputated.<\/p>\n

\u201cProlonged close exposure to the capsule . . . could cause severe, and even potentially deadly, health effects within hours.\u201d<\/p><\/blockquote>\n

Canada is a nation rich in natural resources, with associated industrial activities such as mining, fossil fuel extraction, and the laying of pipelines. These activities commonly use radioactive gauges (also called sealed-source devices) for quality assurance testing, such as measuring water concentration, fluid levels, and material density, or checking for cracks in metal welds.\u00a0Sealed-source devices are also commonly used for sterilizing medical equipment, food irradiation, and radiation therapy.<\/p>\n

Radioactive gauges can be permanently attached to a structure, or they can be portable. While the size of fixed gauges varies depending on what they are used for, portable gauges are generally the size of a large lunch box.<\/p>\n

The Canadian Nuclear Safety Commission (CNSC)\u00a0regulates<\/a>\u00a0sealed-source devices and tracks\u00a0them through its Canadian National Sealed Source\u00a0Registry.<\/p>\n

The International Atomic Energy Agency (IAEA)\u00a0classifies\u00a0radioactive sources as \u201cextremely dangerous\u201d (Category\u00a01) [1]<\/a> to \u201cmost unlikely to be dangerous\u201d (Category\u00a05),[2]<\/a> depending on the radioactive source. The lost Australian radioactive pellet was categorized by IAEA as \u201cunlikely to be dangerous,\u201d (or Category\u00a04) [3]<\/a>\u00a0\u2013 unless, of course, you put it in your pocket.<\/p>\n

There were more than 70,000\u00a0registered radioactive sources in Canada in 2020<\/a>, with about 90% of them being classified as dangerous to humans (Category\u00a01, 2, or 3).<\/p>\n

CNSC requires sealed-source device licensees to report lost or stolen devices. Immediate measures are taken to investigate and locate them, especially for higher-risk devices. From 2008 to 2022, CNSC\u00a0reported<\/a>\u00a037 lost and 27 stolen sealed-source devices. Except for one, all contained sources that were unlikely to be dangerous. Only nine devices were recovered, including the one containing a dangerous source. There have been no reports of radiation-exposure injuries related to these incidents.<\/p>\n

In portable sealed-source devices, the radioactive source is stored in a gauge device that blocks radiation from escaping. The source comes out only when the device is in use, and there are strict operating procedures to protect workers, the public, and the environment.<\/p>\n

An email I received from the CNSC communication staff (on March 31, 2023) about lost sources in Canada said, \u201cTo this day, there has never been a reported event to the CNSC that involved the loss of a sealed source after it came out of the radiation device.\u201d However, as was illustrated by what happened in Peru, there have been incidents that demonstrate the disastrous effects of picking up an unsecured radioactive source, which can look like an innocuous metal pellet.<\/p>\n

In general, minimizing exposure time and staying at least two metres away from a suspect unshielded source will be\u00a0protective<\/a>. In the unlikely event that you recognize a loose radioactive source, stay away, warn others not to approach or handle the source, and call the local authorities. The police and local hazmat teams should know how to assess and manage the situation.<\/p>\n

 <\/p>\n

[1]<\/a> IAEA Safety Standards for protecting people and the environment, Categorization of Radioactive Sources<\/em> (Safety Guide No. RS-G-1.9<\/a>), page 32.<\/p>\n

[2]<\/a>\u00a0IAEA Safety Standards for protecting people and the environment, Categorization of Radioactive Sources<\/em> (Safety Guide No. RS-G-1.9<\/a>), page 33<\/p>\n

[3]<\/a> Written submission from CNSC Staff<\/a>, page 2.<\/p>\n

 <\/p>\n

\"the<\/p>\n

Healthy Debate<\/a>\u00a0publishes journalism\u00a0(clear, captivating op-eds and feature reports) about health care in Canada by the people whose lives it touches the most\u2014from physicians, patients, and caregivers to health journalists, academics, and advocates. Their unique focus on giving a platform to health-care insiders allows them to provide\u00a0detailed coverage of the inner workings\u2014and dysfunctions\u2014of this important sphere of Canadian society. They are a forum where the public can learn about, discuss, and debate health care in Canada and, importantly, imagine what it could become.<\/p>\n

 <\/p>\n

\n

R\u00e9sum\u00e9<\/h2>\n
En f\u00e9vrier\u00a02023, une petite capsule cylindrique est tomb\u00e9e d\u2019une jauge radioactive fixe sur un camion le long d\u2019un trajet de 1\u2009300\u00a0km entre une mine de Rio Tinto \u00e0 Newman, en Australie, et Perth. La minuscule capsule a \u00e9t\u00e9 trouv\u00e9e en parcourant lentement la route en utilisant un d\u00e9tecteur de rayons gamma. M\u00eame si personne n\u2019a \u00e9t\u00e9 bless\u00e9 lors de l\u2019incident, le Dr\u00a0Sandor Demeter, un m\u00e9decin en physique nucl\u00e9aire et en sant\u00e9 publique, se penche sur d\u2019autres cons\u00e9quences potentielles et la possibilit\u00e9 qu\u2019un tel incident se produise au Canada.<\/span><\/div>\n<\/div>\n

 <\/p>\n

\n
\n

\"\"Le Dr Sandor Demeter<\/h2>\n

Sandor est m\u00e9decin en physique nucl\u00e9aire et en sant\u00e9 publique et professeur agr\u00e9g\u00e9 au d\u00e9partement des sciences de la sant\u00e9 communautaire de l\u2019Universit\u00e9 du Manitoba. Il a rempli deux mandats en tant que membre de la Commission canadienne de sant\u00e9 nucl\u00e9aire (CCSN), de m\u00eame que deux mandats en tant que membre de la Commission internationale de protection radiologique (CIPR) Comit\u00e9\u00a03 (m\u00e9decine). Il est aussi membre du panel de r\u00e9vision expert des technologies de la sant\u00e9 de l\u2019Agence canadienne des m\u00e9dicaments et des technologies de la sant\u00e9 (ACMTS).<\/p>\n

Le Dr\u00a0Sandor Demeter a r\u00e9cemment effectu\u00e9 un stage postdoctoral en journalisme mondial \u00e0 l\u2019\u00c9cole de sant\u00e9 publique Dalla Lana de l\u2019Universit\u00e9 de Toronto.<\/p>\n<\/div>\n<\/div>\n

 <\/p>\n

<\/div>\n
\n

Vous voulez lire d\u2019autres articles comme celui-ci ?<\/h2>\n

Le\u00a0Bulletin<\/em> de l\u2019Association canadienne de la radioprotection (ACRP) est une publication essentielle \u00e0 tout professionnel de la radioprotection du Canada. Son contenu \u00e9ditorial procure aux professionnels de la radioprotection les enseignements, l\u2019information, les conseils et les solutions utiles, tous n\u00e9cessaires pour demeurer \u00e0 l\u2019avant-garde de la profession.<\/p>\n

Abonnez-vous aujourd\u2019hui pour que nous vous envoyions un courriel chaque fois qu\u2019un nouveau num\u00e9ro est mis en ligne. Revisitez souvent le site entre chaque num\u00e9ro pour obtenir les mises \u00e0 jour et consulter de nouveaux articles.<\/p>\n

Ne ratez aucun num\u00e9ro. Abonnez-vous d\u00e8s aujourd\u2019hui !<\/p>\nAbonnez-vous<\/span><\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

En f\u00e9vrier\u00a02023, une petite capsule cylindrique est tomb\u00e9e d\u2019une jauge radioactive fixe sur un camion le long d\u2019un trajet de 1\u2009300\u00a0km entre une mine de Rio Tinto \u00e0 Newman, en Australie, et Perth. La minuscule capsule a \u00e9t\u00e9 trouv\u00e9e en parcourant lentement la route en utilisant un d\u00e9tecteur de rayons gamma. M\u00eame si personne n\u2019a \u00e9t\u00e9 bless\u00e9 lors de l\u2019incident, le Dr\u00a0Sandor Demeter, un m\u00e9decin en physique nucl\u00e9aire et en sant\u00e9 publique, se penche sur d\u2019autres cons\u00e9quences potentielles et la possibilit\u00e9 qu\u2019un tel incident se produise au Canada.<\/p>\n","protected":false},"author":124,"featured_media":5288,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[29],"tags":[],"class_list":["post-5296","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles-fr"],"yoast_head":"\nEst-ce que la r\u00e9cente menace radioactive d\u2019Australie pourrait se produire au Canada ? - CRPA-ACRP Bulletin<\/title>\n<meta name=\"description\" content=\"Sandor Demeter d\u00e9crit la r\u00e9cup\u00e9ration d'une capsule radioactive minuscule en Australie et la possibilit\u00e9 que 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