ANNUAL REPORT - MTA SzFKI

SANS. The measured 3 control rods were: K1 (ZfK VA58), K5 (ZfK VA53), Non-used
(ZfK VA77). The characteristics were as follows. Chemical composition: AlMgSi
(Mg(0.9), Si(0.7), Cu(0.1), Mn(0.1), Fe(0.4), Zn(0.2), Ti(0.2) % in Al matrix) rod filled
with B 4 C powder. Size: the diameter is 27mm and the total length is 786mm. Preparation:
pulling and homogenization on high temperature (550 °C). Gamma activity: on surface
(measurement time June of 2005) K5 : 26mSv/h, K1:260mSv/h. We have measured 19
points along the rod. The distance between the measured points is 20mm. We turned the
rod with 90° to measure all side of the rod. The rod was covered with thin Al foil to avoid
the measuring place from the possible radioactive fall out.
I(a.u.)
6x10 3
10 3
10 2
K1_1_4
K1_1_5
K1_1_6
K1_1_7
K1_1_8
K1_1_9
K1_1_10
K1_1_12
K1_1_18
K1_1_19
10 1
3x10 0
10 -2 10 -1 7x10 -1
q (Å -1 )
Fig. 1. Fig. 2.
Fig. 1 shows the rod on the sample stage of the SANS instrument, SANS spectra recorded
alongside the rod and the integrated intensity distribution as a function of the momentum
transfer for the different positions of the rod are given in Fig. 2. A clear correlation of the
irradiation damage (the SANS curves reveal the pore structure evolution in the alloy
material) is followed along the rod as a function of the flux distribution in the height of the
reactor core.
Neutron instrumentation. The 10 MW Budapest Research Rector (BRR) and its
experimental facilities on the KFKI site is a unique large-scale facility in the Central
European region. The Neutron Spectroscopy Department is one of the Laboratories of the
associate institutes forming the Budapest Neutron Centre, which is open for the domestic
and international user community and serves for basic and applied research, commercial
utilisation and education. Experiments performed by the local staff and in collaboration
with national or foreign users coming from universities, industrial or other research
laboratories. We operate several cold and thermal neutron beam instruments: a small angle
scattering (SANS) spectrometer, a reflectometer (REFL), a three axis spectrometer
(TASC) and a cold neutron beam test facility as well as a thermal beam three axis
spectrometer (TAST) and time-of-flight diffractometer (TOFD).
E-Mail:
László Rosta
László Almásy
László Cser
Irina Gladkih
István Füzesy
János Füzi
rosta@szfki.hu
almasy@sunserv.kfki.hu
cser@sunserv.kfki.hu
gladkih@sunserv.kfki.hu
fuzesy@szfki.hu
fuzi@sunserv.kfki.hu
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