ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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!
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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 since 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. local time 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.”
Sushil K. Bhatnagar
Nuclear Technology | Volume 120 | Number 3 | December 1997 | Pages 224-230
Technical Paper | Radiation Protection | doi.org/10.13182/NT97-A35413
Articles are hosted by Taylor and Francis Online.
Penetration shielding design for primary and secondary shield walls in a nuclear power plant proceeds in several iterative cycles. These cycles are needed to refine the conceptual designs for numerous, often conflicting, requirements. These requirements include the following: worker occupancy, in-service inspections, ventilation, pressure and temperature transient controls, equipment qualification, etc. Because the determination of neutron and gamma radiation levels in the containment building of a nuclear power plant requires a three-dimensional calculation, which is both very complicated and expensive, simplified but conservative procedures are needed to provide that input for various other analyses. Once an optimized design is developed, it can be confirmed by either a full three-dimensional analysis or acceptable combinations of discrete ordinates and Monte Carlo methods. The isotropic analog method and its enhancement are presented to provide such an alternative. Included are the methodology, its justification, confirmation, limitations, and suggestions for additional development. This method has already been used for the shielding design of two nuclear power plants and shown to be conservative by a factor of between 2 and 5.