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.
Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Akiyoshi Obonai, Takao Watanabe, Kazuo Hirata
Nuclear Technology | Volume 186 | Number 2 | May 2014 | Pages 280-294
Technical Paper | Reactor Safety | doi.org/10.13182/NT13-61
Articles are hosted by Taylor and Francis Online.
This paper describes the emergency response of the Onagawa nuclear power station (NPS) on March 11, 2011, and the primary factors that allowed the Onagawa NPS to reach a state of cold shutdown, even though it suffered the highest ground acceleration and tsunami, comparable to those at the Fukushima Daiichi NPS. There was no release of radioactive material to the environment despite damage to several pieces of equipment, such as the toppling of a heavy oil tank, short-circuiting of non–safety-related high-voltage metal-clad switchgear, and internal flooding of the reactor auxiliary building. While we conducted the plant control, people who lived in the neighborhood of the NPS, whose residences had been damaged by the tsunami, came to the plant seeking shelter and help with evacuation. We accommodated them in the on-site gymnasium and provided necessities such as food and blankets. Within several days, the number of evacuees increased and surpassed 360, and we lived with them for nearly 3 months. The key points for safe cold shutdown were first, the plant site grade was higher than the maximum tsunami height and, second, an emergency diesel generator for each unit and one of the off-site electrical power lines remained available. In addition to these factors, preparedness (such as seismic reinforcements for all units, updating of tsunami predictions where appropriate, and regular fire drills and simulator training for loss of off-site-power) contributed greatly. However, we must still achieve higher standards of safety. First, we must conduct a detailed evaluation of the March 11 earthquake and tsunami and take necessary actions based on this evaluation. Second, we have to take proper countermeasures against severe accidents. We have learned many lessons from the Fukushima Daiichi accident, and we will continue to make efforts in order to avoid a similar severe accident again.