Radiation shielding of high-energy neutrons in SAD
2005 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 550, 313-328 p.Article in journal (Refereed) Published
The radiation fields and the effective dose at the Sub-critical Assembly in Dubna (SAD) have been studied with the Monte Carlo code MCNPX. The effective dose above the shielding, i.e. in the direction of the incident proton beam of 3.0 mu A, was found to be about 190 mu Sv h(-1). This value meets the dose limits according to Russian radiation protection regulations, provided that access to the rooms in this area is not allowed for working personnel during operation.By separating the radiation fields into a spallation- and a fission-induced part, it was shown that the neutrons with energy higher than 10MeV, originating exclusively from the proton-induced spallation reactions in the target, contribute for the entire part of the radiation fields and the effective dose at the top of the shielding. Consequently, the effective dose above the SAD reactor system is merely dependent on the proton beam properties and not on the reactivity of the core.
Place, publisher, year, edition, pages
2005. Vol. 550, 313-328 p.
SAD, effective dose, MCNPX, high-energy neutrons, sub-critical, ADS
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-6747DOI: 10.1016/j.nima.2005.04.071ISI: 000231964500030ScopusID: 2-s2.0-24344500868OAI: oai:DiVA.org:kth-6747DiVA: diva2:11545
QC 201010052005-09-222005-09-222010-10-05Bibliographically approved