Fusion energy calorimeter for the tokamak fusion test reactor Page: 3 of 7
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
sensors are likely to be in better thermal equil-
ibrium ;.ith the surrounding medium, and the flex-
ibility of the liquid shape makes it easier to in-
vestigate exoerimentally the optimal geometry for
the deratingg medium.
In the neutronics calculations reported in
Ref. 3 and summarized in the following, the mod-
erator was taken as a pure hydrocarbon with a hyd-
rogen-to-carbon atom ratio of 2:1 and a density
)f D.6 ;/cm3. The H/C etio describes the polyet-
hylene molecule, but the density ised is much low-
er, so that the calculationss give larger neutron
slowing-down lengths than would be the case for an
actual polyethylene moderator.
Analyses of Power Deposition
he principal purpose of the neutronics cal-
cjst ons is to detennine to what extent measured
- T-R YEJTRO'i CALORIMETEP -
nj5. Neuror: Saurte = 5m0i nis -
O - \ Gma
W '. Ott m ailnur"I s
- luiron Group
0 20 40 60 30 00
)iSTANCE =ROM FRONT =ACE enm.
Fig. 3. AllIS calculations of energy deposition
profiles in a polyethylenemoderator,
isin9 the model of Fiq. 4, [3036d91
temperature increases in the moderator can be rel-
ated "absolutely" to the fusion neutron fluence
inciont on the calorimeter front face, and thence
to the fusion neutron sourre.
The neutron transport code AN13N-PPL was used
for 1-0 calculations.' The geometric model ;see Fiq.4)
was an infinite cylinder with rotational symmetry.
The input source spectrum and intensity were cal-
culated by the DOT-3.S code: the calculation took
into account ambient neutrons and gammas generated
by scattering from the 7FTR components in the vic-
inity of the calorimeter isee Fig. 2).
Figure 3 shows calculations of the radial power
decosition profiles in Ch for the source neutrons
ll.5-14.9 MeV group), all neutrons, and gammas.
'zema 'actors were used to calculate reaction
rates, which in turn gave the energy deposition
rates. Near the front face, asout :0Z of toe
energy deposited is due to source neutrons,&35
is due to fast neutrons with energies below that
of the first group, and 10 tc 15t is due to ga5ma
radiation. The gamnas are the dominant compoftent
of the total energy deposition at 2ncations 30 cm
or -more from the front face. However, toe total
energy deposition at this joint and beyondd is
Jown oy an order of magnitude from the -aabe near
the front face.
Other ANISN calculations snow that gammas
oroluced in the CH2 account for about 60" of the
total gamma energy deposition (including ambient
'%T? gammas) along :he Major radal axis. The
ONE 3JIENS ONAL 1.\15N% MCE
Vocuu-m S.-304 21a
c' 4 .
75.0 39.01, 86-' 49.2 66.0
--1- 3 -iO
In nte : nser
_ r , Rolsl anal 7/m qmey'
Dimensions n cml
' . :ne-dsmenoinal 4S'i -ode sec 'or
te neutron qalorgeter.
Here’s what’s next.
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Jassby, D.L. & Imel, G.R. Fusion energy calorimeter for the tokamak fusion test reactor, report, April 1, 1981; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1211995/m1/3/: accessed March 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.