• Improving the Safety of Next-Generation Reactors

    On 11 March 2011, in response to a massive earthquake, the nuclear reactors at Fukushima-Daiichi automatically shut down, as designed. The emergency systems, which would have helped maintain the necessary cooling of the core, were destroyed by the subsequent tsunami. Because the reactor could no longer cool itself, the core overheated, resulting in a severe nuclear meltdown. Since then, reactors have improved exponentially in terms of safety, sustainability and efficiency. Unlike the light-water reactors at Fukushima, which had liquid coolant and uranium fuel, the current generation of reactors has a variety of coolant options, including molten-salt mixtures, supercritical water and even gases like helium.

  • Nuclear Terrorism Could Be Intercepted by Neutron-Gamma Detector

    Scanning technology aimed at detecting small amounts of nuclear materials was unveiled by scientists. The technology can be used in airports and seaports for routine inspection of passengers and goods.

  • New Biodefense Lab to Focus on Food Security

    The University of Nebraska has launched a 5-year project to help safeguard the U.S. food supply. The project will address agricultural and natural resources security, defense, and countermeasures; biological defense in support of the U.S. Department of Defense, Department of Homeland Security and other government stakeholders; development and deployment of biosurveillance, biodetection and diagnostic tools; and pandemic preparedness related to human, livestock and crop plant diseases that could result in disruptions to the U.S. and global food systems.

  • Protecting the U.S. Food Supply Chain

    An attack on our food supply—whether from intentional tampering, or due to contagious animal disease—could be dangerous to human health and could cause long-lasting economic impacts. DHS S&T is working to protect the U.S. food supply chain – from the farm to the table.

  • Sarcasm Detector for Online Communications

    Sentiment analysis – the process of identifying positive, negative, or neutral emotion – across online communications has become a growing focus for both commercial and defense communities. Sentiment can be an important signal for online information operations to identify topics of concern or the possible actions of bad actors. The presence of sarcasm – a linguistic expression often used to communicate the opposite of what is said with an intention to insult or ridicule – in online text is a significant hindrance to the performance of sentiment analysis.

  • Scanning People with Their Shoes On

    Taking shoes off for scanning at airports is one of the most inconvenient parts of flying and one that can slow the security screening process. But one day soon, even those without a “pre-check” status may be able to keep their shoes on, step on shoe scanner, walk through a next-generation body scanner and speed safely on to their boarding gates.

  • New Biosensor Detect Toxins and More

    A new device is not quite the Star Trek “tricorder” medical scanner, but it’s a step in the right direction. The Portable EnGineered Analytic Sensor with aUtomated Sampling (PEGASUS) is a miniaturized waveguide-based optical sensor that can detect toxins, bacterial signatures, viral signatures, biothreats, white powders and more, from samples such as blood, water, CSF, food, and animal samples.

  • U.S. Should Make Monitoring and Detecting Nuclear Threats a Higher National Priority

    To address current and evolving nuclear threats, the U.S. needs a higher prioritized and more integrated program for monitoring, detecting, and verifying nuclear test explosions, nuclear weapon stockpiles, and the production of fissile material, says a new report from the National Academies of Sciences.

  • Iran Says 60 Percent Enrichment “Under Way” at Natanz Site

    Iranian officials say the country has begun enriching uranium up to 60 percent purity, higher than it has ever done before, despite ongoing talks between Tehran and world powers to revive the 2015 nuclear deal. Under the 2015 nuclear deal, Iran had committed to keep enrichment to 3.67 percent. Recently it has been enriching up to 20 percent, saying the deal was no longer enforceable. Enriching uranium to 60 percent would be the highest level achieved by Iran’s nuclear program, it is still short of the 90 percent purity needed for military use.

  • UN Watchdog Confirms Assad Used Chemical Weapons against Civilians

    The Organization for the Prohibition of Chemical Weapons (OPCW) on Monday released the findings of the second report by the OPCW Investigation and Identification Team (IIT). IIT concludes that units of the Syrian Arab Air Force used chemical weapons in Saraqib on 4 February 2018.Since 2011, the year the civil war in Syria began, the Assad regime has launched atleast 336 chemical attacks, using Sarin and chlorine, against Sunni civilians.

  • Strengthening Nuclear Storage Research

    Today, nuclear power utilities store over 80,000 metric tons of spent nuclear fuel across the nation. Since the fuel will remain in dry storage longer than was expected, scientists are working to better understand exactly how the fuel behaves under extended storage conditions, how the canisters age, and the forces the two would undergo when shipped and stored for long periods.

  • New Tool Assesses Risk of Wild-Life Origin Viruses

    Researchers have a developed a new framework and interactive web tool, SpillOver, which “estimates a risk score for wildlife-origin viruses, creating a comparative risk assessment of viruses with uncharacterized zoonotic spillover potential alongside those already known to be zoonotic.”

  • Retaining Knowledge of Nuclear Waste Management

    Sandia National Laboratories have begun their second year of a project to capture important, hard-to-explain nuclear waste management knowledge from retirement-age employees to help new employees get up to speed faster. The project has experts share their experience with and knowledge of storage, transportation, and disposal with next generation scientists.

  • Monitoring Current and Future Biological Threats

    DHS S&T has awarded $199,648 to Mesur.io Inc., for analysis and reporting of outbreak-related data. The Mesur.io project proposes to adapt their Earthstream Platform to provide DHS and NBIC with data that tracks metrics related to an outbreak or emergence to predict various risks of a biological threat.

  • Biohazard: A Look at China’s Biological Capabilities and the Recent Coronavirus Outbreak

    When people think about weapons of mass destruction (WMD), they tend to think of things that go “boom.” The bigger the weapon, the bigger the boom, and the worse the impact. However, not all weapons need a big boom to be effective. Every day, millions of people are affected by a weapon that has the potential to do far more damage than a nuclear bomb, a weapon we cannot see, a weapon we call germs.