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Investigation of radiation fields outside the sub-critical assembly in Dubna
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
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2005 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 116, no 1-4, 449-453 p.Article in journal (Refereed) Published
Abstract [en]

The radiation fields outside the planned experimental Sub-critical Assembly in Dubna (SAD) have been studied in order to provide a basis for the design of the concrete shielding that cover the reactor core. The effective doses around the reactor, induced by leakage of neutrons and photons through the shielding, have been determined for a shielding thickness varying from 100 to 200 cm. It was shown that the neutron flux and the effective dose is higher above the shielding than at the side of it, owing to the higher fraction of high-energy spallation neutrons emitted in the direction of the incident beam protons. At the top, the effective dose was found to be similar to 150 mu Sv s(-1) for a concrete thickness of 100 cm, while similar to 2.5 mu Sv s(-1) for a concrete thickness of 200 cm. It was also shown that the high-energy neutrons (> 10 MeV), which are created in the proton-induced spallation interactions in the target, contribute for the major part of the effective doses outside the reactor.

Place, publisher, year, edition, pages
2005. Vol. 116, no 1-4, 449-453 p.
Keyword [en]
cDNA microarray, dark-rearing, opioid-binding cell adhesion molecule, striate cortex
Identifiers
URN: urn:nbn:se:kth:diva-15315DOI: 10.1093/rpd/nci137ISI: 000234784800093Scopus ID: 2-s2.0-31544466226OAI: oai:DiVA.org:kth-15315DiVA: diva2:333356
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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