• Conflicting readings of possible chemical weapons use in Syria

    Rebel sources say the number of dead in a Syrian army chemical weapons attack, which targeted a dozen villages in a rebel-held area east of Damascus, is between 750 and 1,300. They say it is not possible to offer precise numbers because some areas are not yet accessible. The Syrian government strongly rejected the allegations about chemical weapons use by the Syrian army. The Israeli defense minister, in the first official Israeli reaction, confirms the Syrian military used chemical weapons. Chemical weapons experts say there are two other possibilities: the Syrian regime may have used crowd-dispersal chemicals in higher-than-usual concentration, causing death among people trapped in bunkers and shelters; or the army may have used fuel-air bombs in bombing Sunny residential areas. Such bombs, also called thermobaric explosives, rely on oxygen from the surrounding air, unlike most conventional explosives which consist of a fuel-oxidizer premix.

  • U.S. nuclear reactors vulnerable to terrorist attack: study

    More than ten years after the 9/11 hijackers considered flying a fully loaded passenger jet into a Manhattan area nuclear reactor, U.S. commercial and research nuclear facilities remain inadequately protected against two credible terrorist threats — the theft of bomb-grade material to make a nuclear weapon, and sabotage attacks intended to cause a reactor meltdown. A new report finds that none of the 104 commercial nuclear power reactors in the United States is adequately protected — but among the most vulnerable are eleven reactors in California, Connecticut, Florida, Maryland, Massachusetts, Missouri, New York, North Carolina, Texas, and Virginia. One of these reactors, on the grounds of the National Institute of Standards and Technology (NIST), is among the three research reactors fueled with bomb-grade uranium, and is located in the Washington, D.C. suburb of Gaithersburg, less than twenty-five miles from the White House.

  • U.S. radiation exposure guidelines based on unvalidated assumptions: toxicologist

    In the 1950s regulators came to adopt the linear no threshold (LNT) dose-response approach to ionizing radiation exposure, which was later generalized to chemical carcinogen risk assessment. A UMass Amherst toxicologist now offers further evidence to support his earlier assertions that two geneticists deliberately suppressed evidence to prevent the U.S. National Academy of Sciences (NAS) from considering an alternative, threshold model, for which there was experimental support. “This isn’t an academic debate; it’s practical, because all of our rules about chemical and low-level radiation are based on unvalidated assumptions and scientific panel decisions made without sound evidence,” the toxicologist says.

  • Detecting radioactive material smuggled in containers

    Nearly 90 percent of imported and exported goods travel the globe in shipping containers. Roughly 500 million containers travel the sea each year. A Sandia National Laboratories team completed acceptance testing on an enormous mobile scanner — the Mobile Radiation Detection and Identification System (MRDIS) — which makes smuggling radiological materials in containers more difficult.

  • Lawmakers, scientists question FBI’s investigation, conclusion in 2001 anthrax attacks

    Twelve years after the fall 2001 anthrax attacks, and six years after the 2007 FBI’s determination that Bruce Ivins, a top government anthrax researcher at the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID), was the perpetrator of the attacks (Ivins died in 2008 of apparent suicide), lawmakers and USAMRIID scientists insist that the FBI’s conclusions are not supported by scientific evidence – indeed, that some basic scientific facts make the Bureau’s conclusions untenable.

  • U.S. nuclear facilities vulnerable to terrorist attack: study

    Some U.S. nuclear facilities are inadequately protected against theft of weapons-grade materials and sabotage by terrorists. Terrorist attacks on vulnerable nuclear facilities could trigger a meltdown or lead to a diversion of bomb-grade uranium. The danger is far from hypothetical since the 9/11 hijackers are known to have considered flying a passenger jet into a U.S. nuclear reactor before they settled on the World Trade Center as their main terror target.

  • Scientists develop safe method for research on deadly flu viruses

    In 2012, scientists around the world agreed to a worldwide, yearlong voluntary moratorium on research into the deadly H5N1 bird flu. The ban came after several scientific teams successfully altered the H5N1 viral genome to enable airborne transmission of the bird flu between ferrets — mammals considered a good research model for humans. The public health concern was that altered H5N1 could escape the lab, infect and spread among humans, producing a global pandemic. There was also concern that terrorists would use the altered H5N1 viral genome in large-scale bioterror attacks. Researchers have now been able to turn molecules in human lung cells into viral scissors that cut H5N1 bird flu and similar bugs into pieces. This dismantling of the viral genome in human lung cells will ensure safe research on deadly strains of influenza.

  • Small modular reactors (SMEs) a “poor bet” to revive U.S. nuclear renaissance: report

    A shift to small modular reactors (SMRs) is unlikely to breathe new life into the troubled U.S. nuclear power industry, since SMRs will likely require tens of billions of dollars in federal subsidies or government purchase orders, create new reliability vulnerabilities, as well as concerns in relation to both safety and proliferation, according a report issued last week.

  • U.S. military trains to support civil authorities during domestic CBRN incident

    Vibrant Response 13-2 exercise, conducted by U.S. Northern Command and led by U.S. Army North (Fifth Army), is an annual event and is the country’s largest CBRN exercise. The training exercise is used to evaluate a military unit’s operational and tactical ability to support civil authorities during domestic incidents involving chemical, biological, radiological, or nuclear weapons.

  • Molecule “scanner” uses terahertz radiation to identify single molecules

    Molecules could soon be “scanned” in a fashion similar to imaging screenings at airports, thanks to the world’s smallest terahertz detector, developed by University of Pittsburgh physicists. The scanner has the ability chemically to identify single molecules using terahertz radiation — a range of light far below what the eye can detect.

  • Lawmakers criticize FDA, CDC for Cyclospora outbreak foot-dragging

    Lawmakers want to know why it has taken so long for food-safety authorities to respond to the cyclospora outbreak which, so far, has sickened at least 418 people in sixteen states. They also want to know why the FDA and CDC have been tight-lipped about the specific products carrying the parasite — health authorities in Nebraska and Iowa have pointed to bagged salad containing romaine and iceberg lettuce as well as carrots and cabbage as the source – and who is the manufacturer of the contaminated products.

  • Nuclear academics, professionals meet for 6th annual ATR NSUF Users Week

    The sixth annual Advanced Test Reactor National Scientific User Facility (ATR NSUF) Users Week was held 10-14 June at University Place, the satellite campus for Idaho State University and University of Idaho in Idaho Falls. This nuclear research-themed week was the user facility’s opportunity to update the user community on nuclear energy issues and tools, conduct a research forum where users can come and present their research, run specialized workshops, and build collaboration among academic, industry and government institutions.

  • Top-secret super-secure vault declassified

    Down a remote canyon near Los Alamos National Laboratory lies a facility known as the Tunnel Vault. Once one of the most secret and secure locations in the United States, it is the original post-Second World War nuclear stockpile storage area. Built between 1948 and 1949, the facility has a formidable security perimeter, a hardened guard tower — complete with gun ports and bulletproof glass — and a series of gates and doors that lead to a 230-foot long concrete tunnel that goes straight into the canyon wall.

  • Well water contaminants highest near natural gas drilling: study

    A new study of 100 private water wells in and near the Barnett Shale showed elevated levels of potential contaminants such as arsenic and selenium closest to natural gas extraction sites. Researchers believe the increased presence of metals could be due to a variety of factors including: industrial accidents such as faulty gas well casings; mechanical vibrations from natural gas drilling activity disturbing particles in neglected water well equipment; or the lowering of water tables through drought or the removal of water used for the hydraulic fracturing process. Any of these scenarios could release dangerous compounds into shallow groundwater.

  • North Carolina’s biothreat warning system receives funding

    The North Carolina Bio-Preparedness Collaborative (NCB-Prepared), a project to develop an early warning system to detect biothreats, has received $3 million in funding. The goal of NCB-Prepared project is to develop a statewide system that can detect and alert health officials and first responders within hours of an outbreak indicating a bioterror attack, contagious disease or illness, food-borne illness, and other biothreats.