H5N1

California Woolsey fire near nuclear accident site

Via the Bulletin of the Atomic Scientists: California fire near nuclear accident site. Excerpt:

Call it another sad chapter in the long and depressing book of governmental failures to properly clean up after nuclear research and production efforts. Last week, the Woolsey Fire—one of three major, climate change-charged conflagrations now afflicting California—apparently started on the grounds of the Santa Susana Field Laboratory, located just south of Simi Valley and west of Los Angeles. 

Closed in 1996, the lab site was home to rocket engine and nuclear reactor research; one of the nuclear efforts—the Sodium Reactor Experiment—led to the partial melt-down of a reactor in 1959 and the release of radioactive material. But as the Los Angeles Chapter of Physicians for Social Responsibility noted, the Santa Susana site is contaminated in a variety of ways: 

“Decades of nuclear and rocket-engine testing activity, including nuclear reactor accidents and other toxic spills and releases, have resulted in widespread contamination throughout [lab’s] 2,850-acre facility.”  

The California Department of Toxic Substances Control (DTSC) quickly announced that it didn’t believe the fire had released significant amounts of toxins. “Our staff were able to access the site Saturday morning and assess damage caused by the fire,” a Tuesday press release said. 

“We confirmed that the [lab] facilities that previously handled radioactive and hazardous materials were not affected by the fire. Over the weekend our multi-agency team took measurements of radiation and hazardous compounds, both on the site and in the surrounding community. The results from this initial round of testing showed no radiation levels above background levels, and no elevated levels of hazardous compounds other than those normally present after a wildfire.” 

Safecast, an international, volunteer-centered organization formed in the wake of the Fukushima Daiichi nuclear disaster, reported Wednesday that it “had no survey data from the immediate [lab] area prior to the fire, but we had a fair amount of data from nearby communities which showed it to be at normal background levels. Our real-time radiation and particulate sensors in the Southern California region, the closet of which is 30km (about 18 miles) away from [the site], have shown no measurable increases in radiation. Safecast volunteers are on the way to the site, however, so hopefully we will have new data to share soon. Though CalFire indicates that the fire danger in the [lab] area has passed, many roads are still closed, making access difficult.” 

Local activists were not shy about voicing in their disbelief in governmental pronouncements about contamination and the fire. “We can’t trust anything that DTSC says,” West Hills resident Melissa Bumstead said. “DTSC repeatedly minimizes risk from [the lab] and has broken every promise it ever made about the [lab] cleanup. The public has no confidence in this troubled agency.” 

Should it? The Santa Susana Field Laboratory closed 22 years ago, and cleanup efforts remain in the planning stages.

United States woefully unprepared for nuclear strike, say scientists

Via Nature News & Comment: United States woefully unprepared for nuclear strike, say scientists. Excerpt and then a comment:

The United States is not prepared to deal with the aftermath of a major nuclear attack, despite North Korea’s efforts to develop nuclear weapons and the increasing tensions between nations overall. That was the blunt assessment of public-health experts who participated in a meeting last week on nuclear preparedness, organized by the National Academies of Sciences, Engineering, and Medicine.  

The gathering is “an acknowledgement that the threat picture has changed, and that the risk of this happening has gone up”, says Tener Veenema, who studies disaster nursing at Johns Hopkins University in Baltimore, Maryland, and co-chaired the conference in Washington DC.

Since the fall of the Soviet Union in 1991, the United States’s research and preparedness efforts for a nuclear strike have focused largely on the possibility of a terrorist attack with a relatively small, improvised 1-kilotonne weapon or a ‘dirty bomb’ that sprays radioactive material.  

But North Korea is thought to have advanced thermonuclear weapons — each more than 180 kilotonnes in size — that would cause many more casualties than would a dirty bomb (see 'Damage estimates'). 

“Now that thermonuclear is back on the table, we’re back to people saying, ‘We can’t deal with this,’” says Cham Dallas, a public-health researcher at the University of Georgia in Athens.

In one sense, this is surprising: after 1945, US scientists paid close attention to the effects of the A-bombs on Hiroshima and Nagasaki, and must have accumulated an enormous amount of information.

In another sense, it's just a reminder that nuclear war is not something we can ever "prepare for." It's just something to be endured and, if possible, survived. The only real preparation is to ensure that nuclear detonations never happen.

Tepco probe to directly touch melted fuel debris at Fukushima plant

As Japan deals with a brutal heat wave and braces for a typhoon this weekend, The Japan Times reports: Tepco probe to directly touch melted fuel debris at Fukushima plant.

The operator of the crippled Fukushima No. 1 nuclear plant is planning to survey melted fuel debris at the No. 2 reactor by the end of March — using a special device — in an operation it hopes will help it determine the best method for its removal, sources said Wednesday.  

It will be the first survey by Tokyo Electric Power Company Holdings Inc. involving direct contact with the debris at the Nos. 1 to 3 units, which suffered core meltdowns triggered by the March 2011 earthquake and tsunami.  

Tepco is considering extracting debris — the most difficult part of the decommissioning process — first from the No. 2 unit. Gravel-like fuel material was confirmed at the bottom of its containment vessel in a January survey using a telescopic arm. 

The utility aims to collect information in the survey to help determine how to extract the debris and develop a container in which to keep it. A special device will be attached to a pipe with a camera to check whether the fuel material can be moved. Samples may also be collected for analysis, the sources said.  

In the road map compiled by Tepco and the government for scrapping the damaged reactors, the two are to decide on the method for debris extraction and from which unit they will start removing debris. In an underwater robot probe conducted last July at the No. 3 unit, Tepco found what was believed to be debris, but extracting that will be much harder than in the No. 2 unit because the company will need to lower the water level inside the containment vessel. 

The location of the material in the No. 1 unit remains unknown.

Fukushima's long road to recovery

On the seventh anniversary of the Great East Japan Earthquake and tsunami, a BBC News report: Fukushima's long road to recovery. Excerpt:

It was supposed to be a day of celebration. But Rio Watanabe's graduation ceremony became memorable for all the wrong reasons. 

Mr Watanabe, who was just 23 years old at the time, was in Tokyo when the ground started to shake. Japan is used to earthquakes. It experiences more than 100,000 of them every year, according to the Japan Meteorological Agency.  

But the tremors on 11 March 2011 were so violent that Mr Watanabe thought Tokyo was at its epicentre. 

When he realised that they originated 200 miles north of the capital, his thoughts quickly turned to his family in Fukushima, and the Sansuiso Inn run by his father. 

The hot spring's location in the mountains meant it escaped the devastation wrought by the magnitude seven earthquake and tsunami which followed.  

However, a meltdown at the Fukushima Daiichi nuclear power plant sparked fears of contamination, and the spa resort quickly emptied.

Mr Watanabe still remembers how suddenly things changed. "We suffered heavily after the nuclear blast, and all of our bookings were cancelled."  

Seven years on and the hotel's operating profits have not recovered to levels seen before the disaster struck. 

Mr Watanabe says: "Some guests still talk about the nuclear disaster. There is still a negative image about Fukushima, and it's been painful for all of us in this community." 

The tsunami killed almost 16,000 people and forced the country to rethink its energy policy. 

Seven years on and the scars of the 2011 disaster remain. Abandoned houses are obscured by unruly branches and overgrown hedges. Even the vending machines are ignored. But there are also tales of resilience. 

Mr Watanabe had always planned to return to the Sansuiso Inn in Fukushima to help run the hotel with his father. 

He says: "My future was suddenly destroyed and cut off, and I felt so disappointed. It was such as shock."  

But the disaster also brought the community together. Mr Watanabe joined forces with other hot spring owners in the area to form Genki Up Tsuchiyu. "Re-energizing Tsuchiyu" is designed to promote activities in the area and bring the community together.

Branswell: CDC plans session on 'preparing for the unthinkable'

Via STAT, Helen Branswell writes: CDC plans session on 'preparing for the unthinkable': a nuclear detonation. Excerpt:

With this week’s bellicose boasting about who has the bigger red button on his desk, an alert Thursday from the Centers for Disease Control and Prevention felt more than a bit on the nose. 

With the prospect of actual nuclear war breaking out between North Korea and the United States seeming ever more real, the CDC is moving to prepare health professionals and others on what the public health response would be to a nuclear detonation. 

The CDC announced it is staging a grand rounds — a teaching session — on the topic. The target audience: doctors, nurses, epidemiologists, pharmacists, veterinarians, certified health education specialists, laboratory scientists, and others. The event will be held Jan. 16.  

A spokesperson for the agency said planning for the event has been underway for months — in fact, since CDC officials took part in a “radiation/nuclear incident exercise” led by the Federal Emergency Management Agency last April, Kathy Harben said in an email. 

“CDC participants felt it would be a good way to discuss public health preparedness and share resources with states and other partners. State and local partners also have expressed interest in this topic over time,” she said.  

Still, the timing of the announcement was eerie, coming on the heels of back-to-back threats exchanged between North Korean leader Kim Jong Un and President Donald Trump.  

“Join us for this session of Grand Rounds to learn what public health programs have done on a federal, state, and local level to prepare for a nuclear detonation,” urges the CDC email advising people on one of the agency’s mailing lists about the session. “Learn how planning and preparation efforts for a nuclear detonation are similar and different from other emergency response planning efforts.” 

The CDC holds grand rounds virtually monthly on topics such as birth defects prevention, diseases spread by ticks, and sodium reduction. A previous grand rounds on radiological and nuclear disaster preparedness was offered in March 2010.

CDC: Public health response to a nuclear detonation

Thanks to Maryn McKenna for alerting me to this CDC event, scheduled for 1:00 p.m. January 16: Public Health Response to a Nuclear Detonation | Public Health Grand Rounds. Excerpt:

While a nuclear detonation is unlikely, it would have devastating results and there would be limited time to take critical protection steps. Despite the fear surrounding such an event, planning and preparation can lessen deaths and illness.  For instance, most people don’t realize that sheltering in place for at least 24 hours is crucial to saving lives and reducing exposure to radiation. While federal, state, and local agencies will lead the immediate response efforts, public health will play a key role in responding.  

Join us for this session of Grand Rounds to learn what public health programs have done on a federal, state, and local level to prepare for a nuclear detonation. Learn how planning and preparation efforts for a nuclear detonation are similar and different from other emergency response planning efforts.

Six years after Fukushima, robots finally find reactors’ melted uranium fuel

Via The New York Times: Six Years After Fukushima, Robots Finally Find Reactors’ Melted Uranium Fuel. Click or tap through for the full report with photos and a video. Excerpt:

FUKUSHIMA DAIICHI NUCLEAR POWER PLANT, Japan — Four engineers hunched before a bank of monitors, one holding what looked like a game controller. They had spent a month training for what they were about to do: pilot a small robot into the contaminated heart of the ruined Fukushima nuclear plant.  

Earlier robots had failed, getting caught on debris or suffering circuit malfunctions from excess radiation. But the newer version, called the Mini-Manbo, or “little sunfish,” was made of radiation-hardened materials with a sensor to help it avoid dangerous hot spots in the plant’s flooded reactor buildings.  

The size of a shoe box, the Manbo used tiny propellers to hover and glide through water in a manner similar to an aerial drone. 

After three days of carefully navigating through a shattered reactor building, the Manbo finally reached the heavily damaged Unit 3 reactor. There, the robot beamed back video of a gaping hole at the bottom of the reactor and, on the floor beneath it, clumps of what looked like solidified lava: the first images ever taken of the plant’s melted uranium fuel.  

The discovery in July at Unit 3, and similar successes this year in locating the fuel of the plant’s other two ruined reactors, mark what Japanese officials hope will prove to be a turning point in the worst atomic disaster since Chernobyl. 

The fate of the fuel had been one of the most enduring mysteries of the catastrophe, which occurred on March 11, 2011, when an earthquake and 50-foot tsunami knocked out vital cooling systems here at the plant.  

Left to overheat, three of the six reactors melted down. Their uranium fuel rods liquefied like candle wax, dripping to the bottom of the reactor vessels in a molten mass hot enough to burn through the steel walls and even penetrate the concrete floors below. 

No one knew for sure exactly how far those molten fuel cores had traveled before desperate plant workers — later celebrated as the “Fukushima Fifty” — were able to cool them again by pumping water into the reactor buildings. With radiation levels so high, the fate of the fuel remained unknown.

US cities are not medically prepared for a nuclear detonation

Via The Bulletin of the Atomic Scientists: US cities are not medically prepared for a nuclear detonation. The abstract:

The United States is not prepared to deal with an attack by a terrorist group using an improvised nuclear device, the author says. It should get prepared, because the risk is real even if the probability is low, and doing so could save a great many lives. 

The author explores the potential impact of a 10–15-kt improvised nuclear device set off in New York City. The initial blast would kill between 75,000 and 100,000 people in seconds. Another 100,000–200,000 people would be injured, many of them dying within weeks or months, some with burns, others with impact injuries, and some with acute radiation syndrome. 

The demands on the medical system would be vast and overwhelming, all the more so because the bomb would have destroyed much of the capacity to respond. Current planning efforts are not sufficient to manage the carnage.

Fukushima: Robot images show massive deposits thought to be melted nuclear fuel

Via The Guardian, a report by The Associated Press: Fukushima: robot images show massive deposits thought to be melted nuclear fuel. Excerpt:

Images captured by an underwater robot on Saturday showed massive deposits believed to be melted nuclear fuel covering the floor of a damaged reactor at Japan’s destroyed Fukushima nuclear plant. 

The robot found large amounts of solidified lava-like rocks and lumps in layers as thick as 1m on the bottom inside a main structure called the pedestal that sits underneath the core inside the primary containment vessel of Fukushima’s Unit 3 reactor, said the plant’s operator, Tokyo Electric Power Co.

On Friday, the robot spotted suspected debris of melted fuel for the first time since the 2011 earthquake and tsunami caused multiple meltdowns and destroyed the plant. The three-day investigation of Unit 3 ended on Saturday.  

Locating and analysing the fuel debris and damage in each of the plant’s three wrecked reactors is crucial for decommissioning the plant. The search for melted fuel in the two other reactors has so far been unsuccessful because of damage and extremely high radiation levels.

US: More on the Hanford emergency

Credit: Hanford Joint Information Center

Via HANFORD EMERGENCY INFORMATION:

Event Summary 5/9/2017 10:37 AM  

HANFORD SITE EMERGENCY 

The U.S. Department of Energy (DOE) Richland Operations Office activated the Hanford Emergency Operations Center at 8:26 a.m., after an alert was declared. Officials are responding to reports of a cave-in of a 20 foot section of a tunnel that is hundreds of feet long that is used to store contaminated materials. The tunnel is located next to the Plutonium Uranium Extraction Facility, also known as PUREX, which is located in the center of the Hanford Site in an area known as the 200 East Area. 

There is no indication of a release of contamination at this point, Crews are continuing to survey the area for contamination. All personnel in the vicinity of the PUREX facility have been accounted for and there are no reports of injuries. 

Actions taken to protect site employees include: 

• As a precaution, workers in the vicinity of the PUREX facility as well as the Hanford Site north of the Wye Barricade (southern entrance to the site) have been told to shelter in-place 

• Access to the 200 East Area of the Hanford Site, which is located in the center of the Hanford Site, has been restricted to protect employees 

The public can request information regarding the event by calling (509) 376-8116. The media may call (509) 376-3322. 

No action is currently required for residents of Benton and Franklin Counties.