Nav: Home

Radiation 101: DoseNet delivers environmental data as an educational tool

May 25, 2016

Members of a high school science club gather in the school's chemistry lab for a lunchtime meeting to learn about local, natural sources of radiation as a nearby wall-mounted sensor box with glowing LED lights collects live radiation data and feeds it to a website.

A network of these radiation-monitoring devices--designed and engineered by UC Berkeley students working with researchers at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab)--and a companion website and open-source code serve as educational and outreach tools for an international project called DoseNet that stretches from Northern California classrooms to a city hall in Japan.

Its broad aim is to inform and connect students and communities around the world using science and data as common ground.

From Sensor Network to Social Network

"The main objective of DoseNet is to engage students in engineering and science," said Kai Vetter, a Berkeley Lab scientist and UC Berkeley professor and lead scientist for its parent program, Berkeley RadWatch. "Radiation is part of the world around us, and we are using it as a tool to work with students and teach them about science, engineering, and programming."

Berkeley RadWatch is set up to address fears that radiation from the 2011 tsunami-triggered Fukushima Daiichi nuclear power plant accident could find its way to the U.S. West Coast. The RadWatch team has monitored air, fish, seaweed and other types of samples for several years, with results posted online to provide independent and transparent information to the public.

DoseNet sensors are now installed at Berkeley Lab and UC Berkeley, six San Francisco Bay Area schools, and Koriyama City Hall in Fukushima Prefecture, Japan. Koriyama is the network's first international site and is about 45 miles from the Fukushima nuclear plant, outside of the region's evacuation zone. DoseNet's first sensors went online in November 2015.

Vetter said there are plans to expand the network to include more countries, so that the information exchange it promotes truly becomes multinational and multicultural.

"One important component that we really want to capture with DoseNet is going from the sensor network to the social network," he said. "We want to establish this program as a social network, based on science and engineering, so that kids from around the world can communicate and collaborate on the varying natural background radiation levels in their local communities."

Locating the DoseNet network in high schools and colleges allows researchers at Berkeley Lab and UC Berkeley to engage directly with students, teachers, and the broader community, Vetter noted, with an aim toward integrating nuclear and data science, design and engineering, and programming concepts into the curriculum, and providing a platform for students to build new skills.

Inside DoseNet's Monitoring Devices

DoseNet devices consist of a low-cost circuit board and a small radiation sensor developed in the aftermath of the Fukushima disaster through a Japanese nonprofit project, housed in a UC Berkeley-designed, 3-D-printed plastic box that measures 5.5-by-3.5 inches.

The silicon-based sensor provides updates in five-minute intervals on natural or "background" sources of radiation--the kind of radiation that is always present in the environment from sources like the sun, outer space, and rocks and soil. The sensor measures little surges of electrical current produced as gamma rays--a highly energetic form of radiation known as ionizing radiation--knock electrons away from silicon atoms in the sensor.

Data reflecting the frequency of the surges are automatically sent to a Web server at Berkeley Lab. The data can be displayed in different units to reflect the different ways to measure radiation and its effects.

Radiation Monitoring 101

DoseNet staff met with the science club at Campolindo High School in Moraga, Calif., about 22 miles east of San Francisco, last month to provide an update about the school's participation in the DoseNet program.

Club member Alexander Zerkle, a junior at Campolindo, and other students sat at tables topped with beakers and vials in the school's chemistry lab as DoseNet leaders Ali Hanks and Brian Plimley--UC Berkeley postdoctoral researchers affiliated with Berkeley Lab's Applied Nuclear Physics program--presented new details about the school site's radiation data. DoseNet's team also includes undergraduate students from UC Berkeley's Nuclear Engineering, Chemistry, Physics, and Mechanical Engineering departments.

The DoseNet sensors don't provide any info about the isotopes associated with the radiation readings, Hanks and Plimley explained to students, so the DoseNet team used a more sophisticated gamma-ray detector, which resembles a TV news camera, to view isotope-specific details for DoseNet sites.

Hanks noted that three of the most abundant natural radiation sources for the San Francisco Bay Area are forms of potassium, uranium and thorium. Hanks then demonstrated a live measure of the school's background radiation using the gamma-ray detector to show that the site measures lower in potassium than other DoseNet locations.

"Our first goal is getting people to understand that there is natural background radiation that varies geographically," Hanks said, "and another goal is to encourage schools to start incorporating concepts of radiation into their curriculum."

Rachel Eaton, a Campolindo chemistry teacher and adviser to its Science Club, signed on for the school to become a DoseNet site last year after attending an annual workshop hosted by the Department of Nuclear Engineering at UC Berkeley.

Background radiation is a concept that may be unfamiliar to many students and the public at large, Eaton said. "We don't get to cover much in the way of nuclear science" in the regular curriculum, she said. "That's one of the reasons that I really like this project."

Zerkle said, "It's really cool that [DoseNet] exists," adding that the outreach effort has taught him that "high-energy radiation is everywhere" in the natural environment. He said he is interested in studying weather data alongside the radiation data to search for correlations.

Next Steps for DoseNet

The DoseNet website offers individual monitoring site data and also consolidated data from all of the sites. DoseNet offers open-source code, and there are also plans to utilize a Web app called Jupyter to foster data science projects using the Python programming language.

"We are using a relatively simple but powerful software platform," Hanks said. "We want most of this to be at a level where students can work with it."

There is ongoing work to develop weather-sealed DoseNet cases for outdoor use, and there are plans to couple the DoseNet radiation sensors to other types of real-time environmental monitoring such as weather patterns, air pollution, UV (ultraviolet light) and carbon dioxide levels, to provide richer data for students to work with.

Vetter said, "This will enable students to put associated changes in the levels of background radiation in the context of other environmental exposures. By embedding a social platform within the dosimeter network via the DoseNet website, students will be able to engage in longer-term discussions on these concepts."

The DoseNet project is continuing to rapidly expand. For more information or to join the DoseNet community, visit

RadWatch and DoseNet are supported by the Nuclear Science and Security Consortium, which is supported by the U.S. Department of Energy National Nuclear Security Administration's Office of Defense Nuclear Nonproliferation.
Berkeley RadWatch and DoseNet are under the umbrella of Berkeley Lab's Institute for Resilient Communities (, formed last year to better plan for the impacts of natural disasters and human-caused changes by forging stronger international ties in science and education across communities.

Lawrence Berkeley National Laboratory addresses the world's most urgent scientific challenges by advancing sustainable energy, protecting human health, creating new materials, and revealing the origin and fate of the universe. Founded in 1931, Berkeley Lab's scientific expertise has been recognized with 13 Nobel prizes. The University of California manages Berkeley Lab for the U.S. Department of Energy's Office of Science. For more, visit

DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit

DOE/Lawrence Berkeley National Laboratory

Related Engineering Articles:

Engineering the meniscus
Damage to the meniscus is common, but there remains an unmet need for improved restorative therapies that can overcome poor healing in the avascular regions.
Artificially engineering the intestine
Short bowel syndrome is a debilitating condition with few treatment options, and these treatments have limited efficacy.
Reverse engineering the fireworks of life
An interdisciplinary team of Princeton researchers has successfully reverse engineered the components and sequence of events that lead to microtubule branching.
New method for engineering metabolic pathways
Two approaches provide a faster way to create enzymes and analyze their reactions, leading to the design of more complex molecules.
Engineering for high-speed devices
A research team from the University of Delaware has developed cutting-edge technology for photonics devices that could enable faster communications between phones and computers.
Breakthrough in blood vessel engineering
Growing functional blood vessel networks is no easy task. Previously, other groups have made networks that span millimeters in size.
Next-gen batteries possible with new engineering approach
Dramatically longer-lasting, faster-charging and safer lithium metal batteries may be possible, according to Penn State research, recently published in Nature Energy.
What can snakes teach us about engineering friction?
If you want to know how to make a sneaker with better traction, just ask a snake.
Engineering a plastic-eating enzyme
Scientists have engineered an enzyme which can digest some of our most commonly polluting plastics, providing a potential solution to one of the world's biggest environmental problems.
A new way to do metabolic engineering
University of Illinois researchers have created a novel metabolic engineering method that combines transcriptional activation, transcriptional interference, and gene deletion, and executes them simultaneously, making the process faster and easier.
More Engineering News and Engineering Current Events

Top Science Podcasts

We have hand picked the top science podcasts of 2019.
Now Playing: TED Radio Hour

In & Out Of Love
We think of love as a mysterious, unknowable force. Something that happens to us. But what if we could control it? This hour, TED speakers on whether we can decide to fall in — and out of — love. Guests include writer Mandy Len Catron, biological anthropologist Helen Fisher, musician Dessa, One Love CEO Katie Hood, and psychologist Guy Winch.
Now Playing: Science for the People

#543 Give a Nerd a Gift
Yup, you guessed it... it's Science for the People's annual holiday episode that helps you figure out what sciency books and gifts to get that special nerd on your list. Or maybe you're looking to build up your reading list for the holiday break and a geeky Christmas sweater to wear to an upcoming party. Returning are pop-science power-readers John Dupuis and Joanne Manaster to dish on the best science books they read this past year. And Rachelle Saunders and Bethany Brookshire squee in delight over some truly delightful science-themed non-book objects for those whose bookshelves are already full. Since...
Now Playing: Radiolab

An Announcement from Radiolab