Possible radiation leak from North Korea nuke test

Drumboy44

DEFCON Staff
Staff member
South Korea monitoring possible radiation leak from N.K. nuke test

https://twitter.com/DEFCONWSALERTS/status/905259574692892672
 

DEFCON Warning System

Director
Staff member
South Korea said they had not detected any radiation as of Wed morning. But in the evening said they now have.

Note that the all clear came from South Korea's nuclear safety agency while the new report comes from the Unification Minister.
 

Drumboy44

DEFCON Staff
Staff member
#CTBTO data ATM modelling shows day-by-day trajectory of potential radionuclide release after #DPRK announced #NuclearTest – analysts ready!

https://twitter.com/SinaZerbo/status/905264417683763202
 
Here's a thought - the damage done to the mountain where they test may hamper further tests. Even KJU has to know that if they pop off another one and it contaminates Russia or China that what little good will he has left from his neighbors will be up in smoke.

That'd be kinda cool. Say he irradiates Vladivostok and Russia kicks the door down...

Is he that stupid? I don't know. But in any case the mountain test site being compromised opens up new difficulties for NK in my opinion.
 

apollonights

Active member
Butch Coolidge said:
Here's a thought - the damage done to the mountain where they test may hamper further tests. Even KJU has to know that if they pop off another one and it contaminates Russia or China that what little good will he has left from his neighbors will be up in smoke.

That'd be kinda cool. Say he irradiates Vladivostok and Russia kicks the door down...

Is he that stupid? I don't know. But in any case the mountain test site being compromised opens up new difficulties for NK in my opinion.

Or they just escalate and do an atmospheric test in the Pacific to prove they can mount a thermonuclear device to a ICBM...
 
apollonights said:
Butch Coolidge said:
Here's a thought - the damage done to the mountain where they test may hamper further tests. Even KJU has to know that if they pop off another one and it contaminates Russia or China that what little good will he has left from his neighbors will be up in smoke.

That'd be kinda cool. Say he irradiates Vladivostok and Russia kicks the door down...

Is he that stupid? I don't know. But in any case the mountain test site being compromised opens up new difficulties for NK in my opinion.

Or they just escalate and do an atmospheric test in the Pacific to prove they can mount a thermonuclear device to a ICBM...

Uh, yeah, I reckon if they do that then the US may well demonstrate some of it's own hardware.
 

Vortex

Active member
China detects higher radiation levels after N. Korea nuke test

http://www.arirang.com/News/News_View.asp?nseq=208421
 

Drumboy44

DEFCON Staff
Staff member
China has never publicly reported contamination from North Korean nuclear testing. In private Chinese officials have expressed increasing concern about the environmental impact, according to diplomats and analysts.

After a meeting in 2013, then-South Korean President Park Geun-hye said that Chinese Premier Li Keqiang told her that Pyongyang’s test that year contaminated the Yalu River that forms the border with China, according to a South Korean presidential spokesperson. China’s foreign and environment ministries didn’t respond to requests for comment on that conversation.

North Korea’s state-controlled news agency said on Sunday that the test didn’t result in leaking of radioactive materials and had no “adverse impact on the surrounding ecological environment.”

Daily notices from China’s nuclear safety and environmental agencies said no traces of radiation have been detected. Japanese nuclear regulators also said on Tuesday radiation-sensing aircraft found no abnormal readings over the Sea of Japan, just east of the Korean Peninsula.

Pyongyang performs its nuclear tests in solid rock beneath a steep mountain. The depth of the blast would make a large radiation leak unlikely even if there were a cave-in, said Steven Gibbons, a seismologist at Norwegian geological monitoring agency Norsar who specializes in nuclear testing.

“There’s a lot of mountain to go before you reach air,” said Mr. Gibbons. It will likely take days or weeks before radiation from this test is detected, if at all, he said, noting that radioactivity was only detected after two previous North Korean nuclear tests, in 2006 and 2013.

A potential leak would most likely be radioactive xenon gas and, based on weather patterns, would spread into northeastern China and then across far eastern Russia over this week, said Lassina Zerbo, head of the Vienna-based Comprehensive Test Ban Treaty Organization

Along the 880-mile border separating China from North Korea is an active volcano, known as Mt. Paektu to Koreans and Mt. Changbai in China. While previous tests had no impact on it, some volcanologists say a larger underground blast could trigger an eruption. Other experts call that unlikely.

Residents of border areas have grown accustomed to tensions with North Korea, and periodic nuclear or missile tests. But Sunday’s blast, which was estimated to be as much as 10 times more powerful than the last test a year ago, raised the anxiety level...

https://www.wsj.com/amp/articles/china-worries-about-radioactiveand-politicalfallout-from-north-korea-blast-1504690205

*Also kinda convenient that Putin was in the area for a two-day Eastern Economic Forum conference in Vladivostok
https://twitter.com/CivMilAir/status/906026005063581700
https://twitter.com/CivMilAir/status/906030341038628864
https://twitter.com/CivMilAir/status/905964272554999808

(Vladivostok International Airport being a pretty busy airport) top 15 i think out of 70 something
 

Drumboy44

DEFCON Staff
Staff member
Monitoring stations record upward trend, but expert says it could be explained by natural causes

The changes could be down to environmental factors and unrelated to the nuclear test, but the trend was “worthy of attention”, said a scientist who sits on a panel that advises the Chinese government on emergency responses to radioactive hazards.

The radiation level in Changbai Korean autonomous county – the closest Chinese urban area to the Punggye-ri test facility – climbed gradually from an average of 104.9 nanograys per hour immediately after the test on Sunday to 108.5 on Tuesday, according to figures released by China’s environment ministry.

By Wednesday morning the average level in the county, which lies about 80km west of the blast site, had risen to 110.7 with a peak of 112.5.

Nanograys per hour is the standard unit for measuring the absorption of radiation by human tissue.

Similar upward trends were reported by monitoring stations in other regions, including in Antu county at the foot of Changbai Mountain and in Yanbian Korean autonomous prefecture further north.


Guo Qiuju, a professor of radiation protection at the school of physics at Peking University, said it was too early to be certain what had caused the rising trend at the monitoring stations as radiation levels change over time even under normal conditions.

The public had no need to panic as no suspicious trace elements were detected by the government on Tuesday, she said.

“If something bad had happened I would be one of the first to be informed,” she said. “I have not received the call so far.”

The current radiation levels were far below anything that could be regarded as a risk to people’s health, she said, “but if the figures keep going up it may require a closer look”.

http://www.scmp.com/news/china/diplomacy-defence/article/2110056/china-detects-rising-radiation-levels-areas-close-north
 

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krzepice1976

DEFCON Staff
Staff member
Traces of xenon gas, a radionuclide, were detected in South Korea, the nuclear safety agency said Friday, five days after North Korea conducted its most powerful nuclear test.
The

the radioactive material, the xenon-133 isotope, was found in the Nuclear Safety and Security Commission's analysis of ground, air and maritime samplings that were collected locally after the latest nuclear test by the North, according to the agency.
The detected amount measures 0.43 milibecquerel per cubic meter or 0.03 mBq/㎥, according to the analysis.
The agency added, however, that the amount would not have any health effects as South Korea's background radiation currently remains at the usual level of 50-300 nanosieverts per hour.
http://m.yna.co.kr/mob2/en/contents_en.jsp?cid=AEN20170908009900315&domain=3&ctype=A&site=0100000000
 

DEFCON Warning System

Director
Staff member
Information about radiation from this event is difficult to come by. More likely than not, the traces found are so low as to not be worthy of reporting, especially for China which wants to keep the public from panicking. Still, keep an eye out for any reports.

I have listed what we know under Radiation Reports. That info will be deleted tomorrow if nothing new comes up. I generally don't keep radiation reports alive for more than 48 hours unless it is high or we get new information.
 
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