Unformatted text preview: NPREIME 302 Nuclear ower Eu 'ueerin Oé
Fa112002 Second Test [6&1
Please answer all questions Use the back of the answer sheet as no
Name:ll 112 F355 (4:11ng Eat“:
0 > t‘. ‘2 Ba. 5
WdE) llthe following acronyms for nuclear reactor concepts stand for? 35% H 3‘ O
WKBolu‘ia Nate/o Rea do #1.
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L m Amt. as can (A. am (on. .1 
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5 Lli/IFBR‘ “L45 ﬁpiﬁa‘. fdét liaCtOJL ¢ ‘5 a“
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Compare thevaluesoftheneinronﬂuxatadisianceof 100 cmsﬁ’omaueutmnsourceofstrength S = 10 (mg, tum
[neuu’ons / sec] in the following moderators materials: i.
Moderator Density [gm/cm’] Diffusion Length Macroscopic Diffusion I
(L), [cm] absorption cross coefficient,
Q.__—119— 2. ’76 2.2x10'
"Vi/L (H10) Walk «to/‘1.
{b __ 53 Heavy water Edi—1955 z 100 8.5‘x10‘5 0.85
#111) )1, (as 99.75 %
n10) miniature“,
Beryllium (Be) W 0 1c. 21 1.2x10” 0.54
Carbon (C) as a; o 0 at. 54 2 3.2x10“ 0.94 /w__
we 3 a [fag/"Tr .m
HQOI g —;00/  :00 W LI 4
cp— (”JPC ”3 ﬁL/d“ (M “34> LEE...“ 045297
trﬂbiﬂCiOO) ‘tﬂ L ﬂSJLioaJ *"L‘mwo‘ﬂ WWI” '
= ﬁaélklO—BEM:%'L  fill1f, (no New—£42"; :iRg‘iiﬁ Ncwbtons : I33'?}‘5 3
,. sues on'ﬂl Ste—ﬂea, 566 5mm 9“
Considerareactorconsisﬁngofz.54cmdiameternac' urani metalrodsmspcndedinacylindiical
tankﬁlledwithheavywater (D20) asamoderatorandooolant Therodsarear—rangcdina squarelattice
withapitch spacing of15.2 cm 'I'heheightto diameterratiomnk) ofthe cylinderis 1.2. 'I'heinﬁuite
medium multiplication ﬁictor of sucha lattice ls km—  l 25 2The diﬂ‘usion area for thermal neutrons is L2=
175 cmz, andthe Fermiageforfnstneuirons is t 5120 emz.
1. Calculate the migration area M2 for this lattice conﬁguiation.
2. Calculate the material buckling for such a system using the modiﬁed one grmiptheory for a large
reactor.
3. Calciﬁate the uitical radius andthe critical height ofthe reactor.
4 Calculate thenumberofﬁielrodsmthe core
5. Calcu31]atﬁ the volume and weight in metric tonnes of the uranium metal In the core if its density is 19
[gm/cm
6. Calculate the volume am! weight in metric tonnes ofthe D20 in the core ifits density is 1.1 [gin/cmal ® M1: Llil :7 /'i’5'tm1+ i305m7':
® 6;: 1 m ML = (Rﬁ—l : ﬁt‘f'ﬁl'S‘Mcf‘ L/H
@ (3ft (oi#0573 “7
~. my“ = W m :a L
a 1 a 272“ i ' a . 7
Ii 50 a“ 5m (:th . r
' .11.. )&+ 4&2; at q H é)’ gg 4km
zeTAL R; J = inﬁrm ,0' Ha Ruﬂsemm i , mm k/q ...
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 Spring '08
 RAGHEB

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