Page 109 - bukuneutron

erator or neutron generator. Neutron fluxes from these
source is large, that is usually within 104n/cm2/s to
108n/cm2/s in neutron radiography technique. Large
thermal neutron flux will be an advantageous for real
time or time resolved application.This chapter will de-
scribe neutron radiography facility used for research
and development from Reactor TRIGA PUSPATI in Nuk-
lear Malaysia.Traditionally, neutron radiography was util-
ising imulsion cellulose film to capture and record the
image of object. Advancement of technology in imag-
ing, current method use for detecting and recording the
image is by digital camera with appropriate converters.
Cartoon shown in Figure 5.1 is an illustration of three
main parts of neutron imaging instrument.

Generally, neutron radiography has similar princi-
ple with gamma or X-ray radiography. The main dif-
ferent is the technology that convert neutrons to other
form of wave or particle that can be detected and recorded.
Neutron radiography facility in TRIGA PUSPATI Re-
actor utilises neutrons from this TRIGA MARK II nu-
clear reactor core. Vertical cross-section of this reac-
tor showing the neutron radiography facility is shown in
Figure 5.2. NURI utilises the radial beamport 3, there-
fore, the collimator is inserted in this beamport. The
inlet of collimator facing directly the reactor core. This
will cause high gamma radiation and fast neutron in
the incoming beam into the collimator. It is important
to have bismuth and sapphire or alumina in the colli-

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