1952年前总统卡特帮助清理发生在安省的世界第一个严重的核泄漏危机

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1952年12月,渥太华以北200公里的Chalk River核实验室发生燃料棒融化,当时28岁的卡特的军队参加了清理核危机的活动。​

How Jimmy Carter once helped clean up a partial nuclear meltdown in Ontario​


It was December 1952, the Cold War was raging and in a rural Ontario community a nuclear reactor had just partially melted down – the first serious reactor accident in the world.

The partial meltdown at the experimental Chalk River Nuclear Laboratories, about 200 kilometres north of Ottawa, was significant for the changes to reactor safety and design it helped usher in.

。。。。。。

The partial meltdown at the experimental Chalk River Nuclear Laboratories, about 200 kilometres north of Ottawa, was significant for the changes to reactor safety and design it helped usher in.
More than 70 years later, it's also being remembered as the event where a young U.S. naval officer who went on to become president helped disassemble parts of the reactor facility under intense radiation.

Jimmy Carter, best known for being the 39th president of the United States, was at that time Lt. James Earl Carter Jr., a 28-year-old officer who arrived with a team in the aftermath of the accident to help.

The now-98-year-old Carter started hospice care at his home this weekend, prompting a rush of remembrances, including a consequential piece of international nuclear history that played out at Chalk River decades earlier.

"It was very valuable," Morgan Brown, a recently retired Chalk River reactor safety engineer and president of the Society for the Preservation of Canada's Nuclear Heritage, said of the American assistance.

"Personally I'm very grateful to these other (U.S.) teams who were able to come up here."

The accident took place on Dec. 12, 1952, when a series of failures led to a brief surge, melting some of the nuclear reactor's fuel rods and maxing out at about three times
the facility's power, Brown says. No one was killed or seriously injured, and contamination was closely monitored in the aftermath, he said.

In his 1975 autobiography, Carter recounted how he was part of a U.S. military contingency who helped dismantle parts of the reactor facility, donning white protective equipment and working in 90-second shifts to reduce radiation exposure.

His team would first practice their maneuvers on a replica reactor constructed nearby before going in to the real facility.

"There were no apparent aftereffects from this exposure – just a lot of doubtful jokes among ourselves about death versus sterility," Carter wrote in the autobiography.

Carter would later say the cleanup was an indication of the close ties between Canada and the U.S., a relationship he would look to as president during the 1980 Iranian hostage crisis.

Brown noted that records suggest U.S. military personnel arrived several weeks after the accident.

"There would've been contamination," he said. "There would have been relatively high radiation fields and that's why they had limited time to go in and do their job."

Carter was one of the 150 U.S. military personnel who worked on the cleanup alongside roughly 860 facility staff, 170 Canadian military personnel, and 20 construction contractors.

 

1952年12月,渥太华以北200公里的Chalk River核实验室发生燃料棒融化,当时28岁的卡特的军队参加了清理核危机的活动。​

How Jimmy Carter once helped clean up a partial nuclear meltdown in Ontario​


It was December 1952, the Cold War was raging and in a rural Ontario community a nuclear reactor had just partially melted down – the first serious reactor accident in the world.

The partial meltdown at the experimental Chalk River Nuclear Laboratories, about 200 kilometres north of Ottawa, was significant for the changes to reactor safety and design it helped usher in.

。。。。。。

The partial meltdown at the experimental Chalk River Nuclear Laboratories, about 200 kilometres north of Ottawa, was significant for the changes to reactor safety and design it helped usher in.
More than 70 years later, it's also being remembered as the event where a young U.S. naval officer who went on to become president helped disassemble parts of the reactor facility under intense radiation.

Jimmy Carter, best known for being the 39th president of the United States, was at that time Lt. James Earl Carter Jr., a 28-year-old officer who arrived with a team in the aftermath of the accident to help.

The now-98-year-old Carter started hospice care at his home this weekend, prompting a rush of remembrances, including a consequential piece of international nuclear history that played out at Chalk River decades earlier.

"It was very valuable," Morgan Brown, a recently retired Chalk River reactor safety engineer and president of the Society for the Preservation of Canada's Nuclear Heritage, said of the American assistance.

"Personally I'm very grateful to these other (U.S.) teams who were able to come up here."

The accident took place on Dec. 12, 1952, when a series of failures led to a brief surge, melting some of the nuclear reactor's fuel rods and maxing out at about three times
the facility's power, Brown says. No one was killed or seriously injured, and contamination was closely monitored in the aftermath, he said.

In his 1975 autobiography, Carter recounted how he was part of a U.S. military contingency who helped dismantle parts of the reactor facility, donning white protective equipment and working in 90-second shifts to reduce radiation exposure.

His team would first practice their maneuvers on a replica reactor constructed nearby before going in to the real facility.

"There were no apparent aftereffects from this exposure – just a lot of doubtful jokes among ourselves about death versus sterility," Carter wrote in the autobiography.

Carter would later say the cleanup was an indication of the close ties between Canada and the U.S., a relationship he would look to as president during the 1980 Iranian hostage crisis.

Brown noted that records suggest U.S. military personnel arrived several weeks after the accident.

"There would've been contamination," he said. "There would have been relatively high radiation fields and that's why they had limited time to go in and do their job."

Carter was one of the 150 U.S. military personnel who worked on the cleanup alongside roughly 860 facility staff, 170 Canadian military personnel, and 20 construction contractors.

考,Ottawa有没有fallout, 半衰期长着呢

不同放射性核素的放射性半衰期差异很大。短的只有几天、几小时、几分钟,甚至不到1秒钟,长的却可达几千年、几万年,甚至是几亿年、几十亿年。以比较常见的放射性核素为例,氡为3.82天,碘-131约为8天,钴-60为5.3年,氚为12.3年,锶-90为29.1年,铯-137为30.0年,镭-226为1.6X103年,钾-40则长达1.3X109年。一般来说,天然放射性核素的半衰期较长,而多数人工放射性核素的半衰期都较短。

按照半衰期的概念,一定量的放射性核素放置一个半衰期的时间,其放射性活度将减一半;放置6个半衰期,将减至原来的1/64;而放置10个半衰期后,放射性活度只约为原来的1/1000。由此可知,让短半衰期的放射性物质搁置一定时间后,可使其放射性活度降低到很低而不致对人体的健康产生影响;但对长半衰期的放射性核素,有限的时间对其放射性活度的减少几乎不起作用。
 
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