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
Aug 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Chris Wagner: The role of Eden Radioisotopes in the future of nuclear medicine
Chris Wagner has more than 40 years of experience in nuclear medicine, beginning as a clinical practitioner before moving into leadership roles at companies like Mallinckrodt (now Curium) and Nordion. His knowledge of both the clinical and the manufacturing sides of nuclear medicine laid the groundwork for helping to found Eden Radioisotopes, a start-up venture that intends to make diagnostic and therapeutic raw material medical isotopes like molybdenum-99 and lutetium-177.
Osama Badr, Paul Malik
Nuclear Science and Engineering | Volume 91 | Number 4 | December 1985 | Pages 393-403
Technical Paper | doi.org/10.13182/NSE85-A18356
Articles are hosted by Taylor and Francis Online.
The boron injection tank (BIT) of a pressurized water reactor safety system is filled with borated water and pressurized by a nitrogen blanket. Accurate evaluation of the gas poly tropic index (n) during the injection process is important to assure required flow from such tanks. An experimental setup simulating a typical BIT system was built and used to evaluate n of the gas under different test conditions. When the N2 regulator valve was left open, n at the end of the injection process was much lower than 1.0. For the conservative situation with a closed N2 regulator valve, however, n was close to 1.0 under all test conditions. Test duration, which was a strong function of initial gas properties and gas expansion rate, had a noticeable effect on n at the endpoint. Although heat transfer from tank walls had a minor effect at the endpoint, its effect on n after time t from starting injection was noticeable.