ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Tatsuhiko Uda, Masahiro Tanaka, Takahiko Sugiyama, Taku Yamaguchi, Noriyuki Momoshima
Fusion Science and Technology | Volume 54 | Number 1 | July 2008 | Pages 281-284
Technical Paper | Environment and Safety | doi.org/10.13182/FST08-A1813
Articles are hosted by Taylor and Francis Online.
Atmospheric tritium concentrations at the National Institute for Fusion Science (NIFS) Toki site of Japan, where the Large Helical Device (LHD) has been operating, were measured considering future deuterium plasma experiments and environmental safety. The major chemical forms of atmospheric tritium are water (HTO), hydrogen (HT) and methane (CH3T). Average tritium concentrations of HTO, HT and CH3T observed from January 2003 to March 2006 were 9.0 mBq/m3, 9.0 mBq/m3 and 2.0 mBq/m3, respectively. To examine about the systematic error of the air sampling device, we cross-checked with the sampling device of Kumamoto University. The values obtained with both devices were almost consistent. The HTO concentration principally depends on humidity in air. The HTO concentration in the collected water and the HT concentration tend to show seasonal variation. The atmospheric tritium levels measured at Toki were consistent comparing with another environmental values measured in Japan. The present atmospheric tritium monitoring would be useful for safety consideration.