Angular Gamma Dose Rate Distribution at the Surface of Injected Ducted Concrete Shield
โ Scribed by Dr. Fikria M. Sayed Ahmed; Dr. Aida Abboud
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 613 KB
- Volume
- 500
- Category
- Article
- ISSN
- 0003-3804
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โฆ Synopsis
The shielding problems that arise due to the irregular penetrations such as neutral beam injection ducts should be treated carefully to aid in the shield design. The present work was imdrrtaken' to describe the effects arising due to radiation streaming through the neutral be,Lm injector ducts (NBID) on the angular distribution of the total gamma ray doses a t the outer surface of illmenite concrete shield (e = 4.6 g/cm3). The shield is pierced with NBID of different diameters and lrngths.
The measurements were performed using a collimated beam of both gamma rJys and neutrons emitted from one of the horizontal channels of the ET-RR-1 reactor. The measurements were carried out using 7.LiF teflon thermoliminescrnt dosimeters. Generally the obtained data reveal that the prest'nce of the total dose increase a t the centerline of NBID and which in turn tends to decrease with the increase of scattered angle. An empirical formula describing the differential dose rate ratio is predicted. The experimental data obtained reveal good agreement with the calculated ones.
Die rmliale Verteilung der y-Dosisrate auf der Oberflache einer durchliieherten Betonabschirmung
Lnhaltsubersicht. Abschirmprobleme, die ihrcn Ursprung in irregularem UurchlaBvermBgen habon, sollten sorgfiiltig untersucht werden, um die Konstruktion von Abschirmnngen zu unterstiitzen. I n der vorliegenden Arbeit wird versucht, den Effekt von ausgetretener Strahlung (nich dem Mechanismus der neutralen Strahlinjektordurchfuhrung (NBID)) auf die radiale Verteilung der totslen ;>-Strahlendosis auf der auBeren Oberflache ,einer Illmenitbetonabschirmung (e = 4,G g/cm') nufzuzeigen. Der Schild ist mit NBID's verschiedener LBngen und Durchmesser versehen. Die experimentcllen Werte stimnien gut mit berechneten uberein. Eine empirische Formel fur die radiale Verteilang wird angegeben.
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