Providing innovative software to advance the world’s infrastructure, Bentley Systems has hybrid positions available in its Pennsylvania office for software engineers and the head of engineering. Learn more and apply now on #OSJH
https://opensourcejobhub.com/company/1153/
#BentleySystems #OpenSource #engineering #career #software #infrastructure #Cesium
#NIST — The #NationalInstitutes of #Standards & #Technology
…❛❛ #Cesium #fountain #clocks are the most accurate & stable operational clocks the world has ever seen. The best are so good that if one had been running since the time of the #dinosaurs, it would have lost or gained less than 1 second. These are the clocks used to realize the official #second ❜❜…
https://www.nist.gov/atomic-clocks/how-do-we-know-what-time-it 21 Oct 2024 https://mstdn.social/@reshmi/113358574370721995 23 Oct 2024 https://Wikipedia.org/wiki/Time_standard
What’s being done now about #RadioactiveWater that threatens the #ColumbiaRiver in #WashingtonState?
by Annette Cary
Tue, July 9, 2024
"A major #radioactive contamination threat to the Columbia River should be removed at the #Hanford #nuclear site before the end of summer.
"Hanford workers have started to pump contaminated water from the final basin of the nuclear reservation’s nine reactors along the Columbia River.
"'This effort will eliminate the risk of a leak of contaminated water to the groundwater about a quarter-mile from the Columbia River,' said Andy Wiborg, the Department of Energy acting deputy assistant manager for river and plateau cleanup."
[...]
"The K West and K East Reactor basins were the last to be used, after storing irradiated fuel from N Reactor that was not processed following the end of the Cold War. Before the fuel was removed in 2004, it #corroded underwater, contributing to a highly #RadioactiveSludge.
"In 2019 the last of the sludge was removed, leaving draining the water the next major task to reduce risk from the basins.
"The nearby K East Reactor basin was emptied first.
"Then in June, the first tanker truck with basin water pulled away from the K West Reactor.
About 60 tanker trucks have been filled with filtered water to remove radioactive contamination from the K West Reactor basin as it is being drained. The work will protect the nearby Columbia River.
About 60 tanker trucks have been filled with filtered water to remove radioactive contamination from the K West Reactor basin as it is being drained. The work will protect the nearby Columbia River.
"About 400,000 gallons have been pumped out of the basin so far, which is the equivalent of six residential swimming pools, said Heather Dale, DOE Hanford assistant manager for the river and plateau. About 60 tanker trucks have been filled with basin water.
[...]
"They also installed a system to pump out and then filter the contaminated water before it it loaded into tanker trucks.
"The filtering system removes particles and also uses an ion exchange system to remove radioactive #cesium and #strontium from the water. The initial resin used in the ion exchange system DID NOT WORK WELL, the Defense Nuclear Facilities Safety Board said in January.
[...]
"Some of the contents of the vertical pipe units in the K West Reactor basin may be required to be sent to the nation’s repository for transuranic radioactive waste in New Mexico for disposal [#WIPP].
Read more:
https://news.yahoo.com/news/being-done-now-radioactive-water-181740119.html
#WaterIsLife
#NoNukes
#NoDumping
#FutureGenerations
#NoWar
#NoNuclearWeapons
#RethinkNotRestart
#NuclearWaste
#HanfordNuclearSite
Highly Radioactive Leak At Hanford Came From Spent Fuel Experiments
July 1, 2023
"A recent admission that contaminated soil at the 324 Building at the #Hanford National Lab site was much worse than previously estimated raised concerns this week. A ballpark conversion of the radiation level cited in the article was roughly 1,780 sieverts per hour.
"How did this defunct building at Hanford end up with such #radioactive soil contamination beneath it? The 324 Building housed hot labs including the B Cell. This large hot lab did various experiments including using liquified highly radioactive #Strontium 90 and #cesium 137 extracted from high burnup spent #nuclear fuel. This highly radioactive liquid was used in vitrification experiments, a technology to isolate nuclear waste. The B Cell had a history of spills, fires and equipment failures that lead to significant contamination of the facility and ground beneath it.
"The Department of Energy cites that the waste sump for this hot cell was found to have a breach in it that likely allowed waste to leak out of the facility. There also was a history of spills of this highly radioactive liquid extract of spent fuel."
https://simplyinfo.org/2023/07/highly-radioactive-leak-at-hanford-came-from-spent-fuel-experiments/
Toshihiro Wada, an associate professor of fish ecology at #FukushimaUniversity, said of the heavily contaminated #fish, "It's likely that #cesium was concentrated within the fish from the food chain, confined as it is by the inner breakwater where radioactive substances have accumulated from the drainages flowing into the port." #Japan
Cesium 180 times limit found in fish at #Fukushima nuke plant 12 years after disaster - The Mainichi
https://mainichi.jp/english/articles/20230718/p2a/00m/0na/019000c
#Chinese owner of #Tanco #mine in #Manitoba revived talk of draining a lake to extract more #cesium from one of the world's few deposits of the mineral.
#SinomineResourceGroup is musing about long-term redevelopment of its mine; purchased in 2019 along shores of #BernicLake - a small #CanadianShield body of #water located between Whiteshell & Nopiming provincial #parks
180 times much as #radioactive #cesium detected in fish from #Fukushima #nuclear plant port
via #FukushimaDiary
"On the 5th of June, 2023, #Tepco announced they detected 18,000 Bq/Kg of radioactive cesium from Black rockfish collected in the port of the crippled nuclear plant of Fukushima.
"This is 180 times much as the current food safety standard (100 Bq/Kg).
"Moreover, the detected 18,000 Bq/Kg of radioactive cesium consists of Cs-134 and Cs-137.
"The half-life of Cs-134 is up to 2 years, nevertheless this black rockfish contained 380 Bq/Kg of Cs-134. Tepco has not publicly made an announcement regarding the detection of Cs-134."
But yeah, we should believe #TEPCO and govt of #Japan when they tell us the "treated" #FukushimaDaiichi water is safe, eh?
Japan's TEPCO 'exaggerates' #nuclear wastewater safety with faulty dosimeter
October 2022
"The Tokyo Electric Power Company Holdings Inc. (TEPCO) has been exaggerating the safety of treated nuclear wastewater with a dosimeter that fails to detect certain radioactive substances at Japan's Fukushima Daiichi nuclear power plant, local media has reported.
"When demonstrating the safety of treated nuclear wastewater, the company uses a dosimeter that fails to detect radioactive #tritium, but only responds to high-concentration cesium emitted by gamma rays, the Tokyo Shimbun reported.
"During tours at the plant, TEPCO staff put a dosimeter that detects only gamma rays near a bottle containing treated water, as a demonstration that the treated water is safe, according to the newspaper.
"However, the water contained tritium which is about 15 times the amount of the release standard, it reported.
"The gamma rays, which may affect the human body due to external exposure, are generated by the radioactive #cesium contained in the radiation-tainted water."
#Fukushima #WaterIsLife #NoNukes #NoMoreNukes #RethinkNotRestart #Nucleare #SaveThePlanet
Will Japan release Fukushima water into the Pacific?
Officials in Japan have claimed that water exposed to radiation in the Fukushima nuclear disaster is now safe to dump into the Pacific. Environmentalists say the water is too contaminated.
by Julian Ryall , November 20, 2019
"#TEPCO and the government [of #Japan] have long believed that the best way to dispose of the water is to simply release it into the #ocean. They claimed until this year that contaminated water had been cleansed by a so-called advanced liquid processing system to the point that virtually all the radionuclides had been reduced to 'non-detect' levels.
"Leaked TEPCO documents, however, show that varying amounts of 62 radionuclides — including #strontium, #iodine, #cesium and #cobalt — have not been removed from the water.
"The company has also been criticized for refusing to permit independent organizations to test the water that is being stored at the site.
"Nevertheless, environmentalists fear that preparations are under way to release the water into the environment.
"'Even a year ago, when the first report on options for disposing the treated water was presented to the committee, it seemed clear to me even then that the preferred option was to release it into the ocean,' said Azby Brown, the lead researcher for Tokyo-based nuclear monitoring organization #Safecast Japan. Other options included #evaporation and burying the water.
"'My take on this is that they have already reached a decision and that all these discussions now on the options are purely theater.'"
#FukushimaWater #NoDumping #WaterIsLife #StopTEPCO #NoNukes #TEPCOLies #OpTEPCO #PacificOcean #FukushimaAnniversary #NoNewNukes #AtomkraftNeinDanke #AntiAtom
@attacus
Unlike many other lost source incidents (Goiânia Brazil, Tammiku Estonia, Samut Prakarn Thailand, Li Georgia) which are documented in fascinating detail on the IAEA site, there is very little information available on this particular accident.
But they do mention the source had a 1800 R/year dose rate. Interestingly, this works out to 2 mSv/hr which is exactly the same as was quoted for the WA source.
The other day, a friend of mine pointed out that the missing cesium capsule in Western Australia is the same kind of capsule as the one that led to the Kramatorsk incident in Ukraine in the 1980s, in case you wanted context on how absolutely dangerous this tiny thing is.
CW in this article for mentions of deaths, including of children: https://en.wikipedia.org/wiki/Kramatorsk_radiological_accident
