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.
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
2021 Student Conference
April 8–10, 2021
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
Don't forget to vote!
The 2021 ANS Election is open. This is your chance to help shape the future of your Society.
All ANS members were sent an email on February 22 with a unique username and password from Survey & Ballot Systems (SBS). If you did not receive this email or you do not have your election login information, please go to directvote.net/ANS, enter your email address that is on file with ANS, and your election login information will be emailed to you.
G. K. Pandey, I. Banerjee, G. Padmakumar, C. Anandababu, K. K. Rajan, G. Vaidyanathan, P. Kalyanasundaram, S. C. Chetal, Baldev Raj
Nuclear Technology | Volume 175 | Number 3 | September 2011 | Pages 692-699
Technical Note | NURETH-13 Special / Fission Reactors | dx.doi.org/10.13182/NT11-A12516
Articles are hosted by Taylor and Francis Online.
A sodium-cooled, 500-MW(electric) prototype fast breeder reactor (PFBR) is under construction in Kalpakkam, India. The PFBR core houses various subassemblies that are supported vertically inside the core by the sleeves provided in the grid plate. A small radial gap exists between the grid plate sleeve and the foot to facilitate easy handling of subassemblies. It is natural that there will be some leakage flow through this radial gap into the hot and cold pools of the PFBR. To minimize this leakage flow, top and bottom labyrinths are provided on the foot of the subassemblies. The total leak flow rate permitted from the top labyrinth is 195 kg/s, whereas the leak flow rate allowed through the bottom labyrinth is 436 kg/s. Labyrinth-type sealing devices have been developed by carrying out experimental studies. Based on various parametric studies, the labyrinth geometry was optimized. It was found that apart from the clearance between the foot and sleeve, important parameters affecting pressure drop are groove profile, groove pitch, groove-depth-to-width ratio, etc. Taking into account the outcome of these studies, helical square grooved labyrinths have been designed and manufactured for PFBR. This paper presents the details of the similarity criteria followed, experimental methodology applied, and results obtained from the experiments along with their transposability to reactor conditions.