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Calculation and Experiment of Adding Top Beryllium Shims for Iran MNSR

[+] Author Affiliations
Javad Ebadati, Iraj Shahabi, Mehdi Rezvanifard

Esfahan Nuclear Technology Center (ENTC), Esfahan, Iran

Paper No. ICONE14-89030, pp. 311-314; 4 pages
doi:10.1115/ICONE14-89030
From:
  • 14th International Conference on Nuclear Engineering
  • Volume 3: Structural Integrity; Nuclear Engineering Advances; Next Generation Systems; Near Term Deployment and Promotion of Nuclear Energy
  • Miami, Florida, USA, July 17–20, 2006
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4244-4 | eISBN: 0-7918-3783-1
  • Copyright © 2006 by ASME

abstract

M iniature N eutron S ource R eactor which is called MNSR were put into operation on June 1994 in Esfahan Nuclear Technology Center (ENTC). At that time the excess reactivity at the cold condition was 3.85 mk. After 7 years of operation and fuel consumption the reactivity was reduced to 2.90 mk. To compensate this reduction and upgrade the reactor, Beryllium Shim were used at the top of the core. This paper discusses the steps for this accurate and sensitive task. Finally a layer of 1.5 mm Beryllium were added to restore the reactor life.

Copyright © 2006 by ASME

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