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Science and Technology of Nuclear Installations
Volume 2014, Article ID 395795, 23 pages
http://dx.doi.org/10.1155/2014/395795
Review Article

Compilation of Existing Neutron Screen Technology

1National Centre for Scientific Research “Demokritos”, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, 15310 Aghia Paraskevi, Greece
2Department of Physics, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 15780 Zografou, Greece

Received 17 October 2013; Revised 22 April 2014; Accepted 23 April 2014; Published 11 August 2014

Academic Editor: Alejandro Clausse

Copyright © 2014 N. Chrysanthopoulou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The presence of fast neutron spectra in new reactors is expected to induce a strong impact on the contained materials, including structural materials, nuclear fuels, neutron reflecting materials, and tritium breeding materials. Therefore, introduction of these reactors into operation will require extensive testing of their components, which must be performed under neutronic conditions representative of those expected to prevail inside the reactor cores when in operation. Due to limited availability of fast reactors, testing of future reactor materials will mostly take place in water cooled material test reactors (MTRs) by tailoring the neutron spectrum via neutron screens. The latter rely on the utilization of materials capable of absorbing neutrons at specific energy. A large but fragmented experience is available on that topic. In this work a comprehensive compilation of the existing neutron screen technology is attempted, focusing on neutron screens developed in order to locally enhance the fast over thermal neutron flux ratio in a reactor core.