Study on Rod Position Indication System using Permanent Magnets with Shielding Plates for a Control Rod Drive Mechanism

  • 투고 : 2015.09.25
  • 심사 : 2015.12.02
  • 발행 : 2015.12.31


A control rod drive mechanism (CRDM) is an electromechanical equipment that provides linear movement for the control rods to control the nuclear reactivity in a nuclear reactor. A rod position indication system (RPIS) detects the control rod's position. To enhance the measurement accuracy of the system, a magnetostrictive type sensor with capability of generating operation limiting signals would be adapted instead of a conventional RPIS for a CRDM. An RPIS was modelled for a numerical analysis with the permanent magnets at the stationary limit positions and magnetic shielding plates with a moving permanent magnet. The performance analysis of the RPIS were conducted, and the results were discussed here.


연구 과제 주관 기관 : National Research Foundation of Korea (NRF)


  1. H. Huh, J. I. Kim, and K. J. Kim, Trans. of KIEE, 52D, (2003).
  2. C. A. Lawson and W. L. Dufek, Position indication system, Patent number 4371496, United States Patent, 1983.
  3. J. Joule, Annals of Electricity, Magnetism, and Chemistry 8, (1842).
  4. R. J. Krisst, Magnetostrictive position indicator, Patent number 4071818, United States Patent (1978).
  5. T. Ishida, S. Imayoshi, T. Yoritsune, H. Nunokawa, M.- A. Ochiai, and Y. Ishizaka, J. Nuclear Sci. and Technol. 38, (2001).
  6. J. S. Lee, J. W. Kim, and K. K. Kim, Application number 10-2015-0022310, Korea Patent (2015).
  7. Pr. M. Drljaca, F. Vincent, P.-A. Besse, and R. S. Popovic, Sensors and Actuators, A 97-98 (2002).
  8. H. Blanchard, F. De Montmollin, J. Hubin, and R. S. Popovic, Sensors and Actuators, 82, (2000).
  9. User's Guide Maxwell [Online]. Available: http://, accessed (2015).
  10. J. Y. Yu, J. H. Kim, H. Huh, and J. I. Kim, Transactions of the Korean Nuclear Society Spring Meeting (2002).
  11. Data sheet -Terfenol-D,, Extrema Products Inc.

피인용 문헌

  1. Study on Magnetic Property for Test Coil and Permanent Magnet vol.26, pp.5, 2016,