GiôGiôùùii thiethieääuu chươngchương trtrììnhnh MCNPMCNP PhaPhaàànn 1:1: GiôGiôùùii thiethieääuu MCNPMCNP PhaPhaàànn 2:2: CaCaùùchch tataïïoo file inputfile input trongtrong MCNPMCNP PhaPhaàànn 3:3: MoâMoâ tataûû nguonguoàànn PhaPhaàànn 4: Tally card4: Tally card PhaPhaàànn 5:5: ThThöö vievieäänn sosoáá lielieääuu hahaïïtt nhaânnhaân PhaPhaàànn 6:6: cacaááuu trutruùùcc chchööôngông trtrììnhnh MCNPMCNP

P1:P1: GiôGiôùùii thiethieääuu MCNPMCNP

1. MCNP (Monte Carlo N1. MCNP (Monte Carlo N--Particle)Particle) lalaøø phaphaàànn memeààmm öùöùngngduduïïngng phphööôngông phaphaùùpp Monte CarloMonte Carlo moâmoâ phophoûûngng cacaùùcc quaquaùùtrtrììnhnh vavaäätt lylyùù mangmang ttíínhnh thothoáángng keâkeâ ((cacaùùcc quaquaùù trtrììnhnh phaânphaânraõraõ hahaïïtt nhaânnhaân,, ttööôngông tataùùcc gigiööõaõa hahaïïtt nhaânnhaân vôvôùùii vavaäätt chachaáátt,,thoângthoâng llööôôïïngng neutronneutron ……). MCNP). MCNP ssöûöû duduïïngng cacaùùcc ththöö vievieäännsosoáá lielieääuu hahaïïtt nhaânnhaân cucuûûaa cacaùùcc quaquaùù trtrììnhnh ttíínhnh toatoaùùnn,, gieogieo sosoáángaãungaãu nhieânnhieân tuaântuaân theotheo cacaùùcc quyquy lualuaäätt phaânphaân boboáá,, ghighi lalaïïiissöïöï kiekieäänn lòchlòch ssöûöû cucuûûaa momoäätt hahaïïtt phaphaùùtt rara ttöøöø nguonguoàànn ññeeáánn heheááttthôthôøøii giangian sosoáángng cucuûûaa nonoùù..

GiôGiôùùii thiethieääuu MCNP (MCNP (tttt))

2.2. ChChööôngông trtrììnhnh cocoùù nhienhieààuu öùöùngng duduïïngng nhnhöö:: thiethieáátt kekeááloloøø phaphaûûnn öùöùngng, an, an toatoaøønn tôtôùùii hahaïïnn,, cheche chachaéénn vavaøø babaûûooveveää,, phaânphaân ttííchch vavaøø thiethieáátt kekeáá ññaaààuu dodoøø,, vavaäätt lylyùù tròtrò lielieääuu,,nghieânnghieân ccöùöùuu khkhíí quyequyeåånn,, nhienhieäätt phaphaùùtt quangquang dodophophoùùngng xaxaïï,, chuchuïïpp aaûûnhnh babaèèngng phophoùùngng xaxaïï……

P2: File inputP2: File input côcô babaûûnn

Cell cardsCell cardsSurface cardsSurface cardsData cardsData cards

File inputFile input PhaPhaàànn INPINP cucuûûaa chchööôngông trtrììnhnh ñöñöôôïïcc xaxaùùcc ññònhònh

nhnhöö sausau::KhoKhoááii thoângthoâng tin (tin (NeNeááuu cacaàànn))TieâuTieâu ññeeàà cucuûûaa babaøøii toatoaùùnnÑÑònhònh nghnghóóaa oâoâ mamaïïngng (cell cards)(cell cards)

..GiôGiôùùii hahaïïnn babaèèngng dodoøøngng trotroáángngÑÑònhònh nghnghóóaa mamaëëtt (surface cards)(surface cards)

..GiôGiôùùii hahaïïnn babaèèngng dodoøøngng trotroáángngData cardsData cards

..SoSoáá dodoøøngng trotroáángng ((NeNeááuu cacaàànn))

MCNP CellsMCNP Cells

MCNPMCNP cocoùù khakhaûû naêngnaêng moâmoâ tataûû hhììnhnh hohoïïcc babachiechieààuu.. BaBaáátt kykyøø momoäätt öùöùngng duduïïngng kyõkyõ thuathuaäätt nanaøøoocuõngcuõng cocoùù cacaááuu trutruùùcc hhììnhnh hohoïïcc nhanhaáátt ññònhònh nhnhöö:: LoLoøøPhaPhaûûnn öùöùngng HaHaïïtt nhaânnhaân,, buobuoààngng chiechieááuu xaxaïï,, cacaùùcc moâmoâhhììnhnh ththíí nghienghieäämm......

CaênCaên ccöùöù treântreân heheää totoïïaa ññooää DecartesDecartes, MCNP, MCNP lalaááyycacaùùcc mamaëëtt bieânbieân cucuûûaa momoäätt khokhoááii vavaäätt chachaáátt ññeeåå moâmoâtataûû,, ñöñöôôïïcc gogoïïii lalaøø cell.cell.

MCNP Cells (MCNP Cells (tttt))

MoMoäätt cellcell ñöñöôôïïcc xaxaùùcc ññònhònh ththìì khakhaùùii nienieäämm quanquantrotroïïngng lalaøø chiechieààuu cucuûûaa nhnhööõngõng ññieieååmm trongtrong cellcelllalaøø cacaùùcc mamaëëtt lieânlieân kekeáátt vôvôùùii nhaunhau..

CellCell ñöñöôôïïcc xaxaùùcc ññònhònh bôbôûûii::ToaToaùùnn ttöûöû giaogiao ((khoângkhoâng giangian))ToaToaùùnn ttöûöû hôhôïïpp (:)(:)PhaPhaàànn bubuøø cacaùùcc vuvuøøngng trongtrong khoângkhoâng giangian (#).(#).MoãiMoãi cellcell cocoùù phaphaàànn thetheåå ttííchch nhanhaáátt ññònhònh..

Cell cardsCell cardsCuCuùù phaphaùùpp:: j m dj m d geomgeom paramsparamsHoaHoaëëcc j like n but listj like n but list

trongtrong ññooùù::j:j: chchææ sosoáá cell,cell, vôvôùùii 11 jj 99999,99999, neneááuu cellcell cocoùù ssöïöï chuyechuyeåånn ññooååii TRTR ththìì

11 jj 999999m:m: lalaøø sosoáá vavaäätt chachaáátt trongtrong cell,cell, sosoáá vavaäätt chachaáátt ñöñöôôïïcc thaythay babaèèngng 00 ññeeåå chchææ

cellcell trotroáángng..d:d: lalaøø khokhoááii llööôôïïngng rieângrieâng cucuûûaa cell (atom/cmcell (atom/cm33)) hoahoaëëcc (g/cm(g/cm33))geomgeom:: phaphaàànn moâmoâ tataûû hhììnhnh hohoïïcc cucuûûaa cell,cell, baobao gogoààmm chchææ sosoáá cacaùùcc mamaëëtt tuytuyøø

theotheo vuvuøøngng giôgiôùùii hahaïïnn..paramsparams:: cacaùùcc thamtham sosoáá tuytuyøø chochoïïnn: imp, u,: imp, u, trcltrcl, lat, fill. . ., lat, fill. . .n:n: teânteân cucuûûaa momoäätt cellcell khakhaùùcclist:list: nhnhööõngõng thuothuoääcc ttíínhnh cell ncell n khakhaùùcc vôvôùùii cell jcell j

Cell cards (Cell cards (tttt))CellCell ñöñöôôïïcc ññònhònh nghnghóóaa treântreân cell card.cell card. MoãiMoãi

cellcell ñöñöôôïïcc moâmoâ tataûû babaèèngng nhnhööõngõng concon sosoáá,, sosoáá vavaäättchachaáátt,, mamaäätt ññooää vavaäätt chachaáátt tietieáápp theotheo lalaøø momoäätt daõydaõysosoáá cucuûûaa cacaùùcc mamaëëtt lieânlieân kekeáátt thathaøønhnh momoäätt cellcell vavaøøcell data.cell data.Cell Material Density SurfacesCell Material Density Surfaces

1 4 9.921e1 4 9.921e--2 12 1 --2 32 3 --44MaMaäätt ññooää vavaäätt chachaáátt chchææ sosoáá ddööôngông lalaøø ttíínhnh

babaèèngng atom/cmatom/cm33

Cell cards (Cell cards (tttt))Cell Material Density SurfacesCell Material Density Surfaces Cell dataCell data1 41 4 --1.0 11.0 1 --2 32 3 --44 imp:nimp:n=1=1

MaMaäätt ññooää aâmaâm ttíínhnh babaèèngng g/cmg/cm33

MaMaäätt ññooää vavaäätt chachaáátt babaèèngng 00 chchææ cellcell trotroáángng::22 00 --1:2:1:2:--3:43:4hoahoaëëcc2 0 #12 0 #1

MCNP SurfacesMCNP SurfacesMaMaëëtt ñöñöôôïïcc moâmoâ tataûû bôbôûûii cacaùùcc phphööôngông trtrììnhnh:: trangtrang 33--

1414 MaMaëëtt phaphaúúngng MaMaëëtt cacaààuu MaMaëëtt trutruïï MaMaëëtt nonoùùnn Ellipsoid,Ellipsoid, hyperboliodhyperboliod,, paraboloidparaboloid,, torustorus..CaCaùùcc mamaëëtt bieânbieân ññaaëëcc trtrööngng:: MaMaëëtt phaphaûûnn xaxaïï (reflection)(reflection)

Surfaces CardsSurfaces CardsCuCuùù phaphaùùpp:: j n a listj n a list

trongtrong ññooùùj:j: sosoáá mamaëëtt 11 jj 99999,99999, dadaááuu "*""*" chocho mamaëëtt

phaphaûûnn xaxaïï,, dadaááuu "+""+" chocho mamaëëtt trongtrong suosuoáátt..n:n: khoângkhoâng cocoùù hoahoaëëcc sosoáá 00 lalaøø khoângkhoâng chuyechuyeåånn

trutruïïcc totoïïaa ññooää TR.TR.neneááuu n > 0n > 0 sosoáá mamaëëtt bòbò chuyechuyeåånn trutruïïcccocoøønn n < 0n < 0 sosoáá mamaëëtt jj lalaëëpp lalaïïii mamaëëtt nna:a: kkíí hiehieääuu loaloaïïii mamaëëttlist:list: cacaùùcc heheää sosoáá nhanhaääpp vavaøøoo ((babaûûngng 3.1).3.1).

Surfaces Cards (Surfaces Cards (tttt))Surface Name DataSurface Name Data

11 pxpx 55chchææ mamaëëtt phaphaúúngng vuoângvuoâng gogoùùcc vôvôùùii trutruïïcc xx--axisaxiscocoùù phphööôngông trtrììnhnh: x: x--D=0D=0 trongtrong ññooùù D = data.D = data.

5 so 4.205 so 4.20chchææ mamaëëtt cacaààuu cocoùù phphööôngông trtrììnhnh: x: x22+y+y22++ zz22--RR22=0,=0,trongtrong ññooùù R=dataR=data

22 czcz 3.13.1chchææ mamaëëtt trutruïï cocoùù phphööôngông trtrììnhnh: x: x22+y+y22--RR22=0, R=data=0, R=data

ChieChieààuu cucuûûaa SurfacesSurfacesf(xf(x, y, z)=S, y, z)=S

TrongTrong ññooùù:: ff lalaøø phphööôngông trtrììnhnh mamaëëtt x, y, zx, y, z lalaøø trutruïïcc totoïïaa ññooää 33--DD SS lalaøø ññieieååmm nanaèèmm treântreân trutruïïcc x, y, zx, y, z ss mangmang giagiaùù tròtrò ddööôngông (positive)(positive) --ss mangmang giagiaùù tròtrò aâmaâm (negative)(negative) s=0s=0 ññieieååmm nanaèèmm treântreân mamaëëtt ññooùù..

ChieChieààuu cucuûûaa Surfaces (Surfaces (tttt)) SOSO cocoùù phphööôngông trtrììnhnh mamaëëtt:: xx22+y+y22++ zz22--RR22=0=0 R=3 0+0+0R=3 0+0+0--3322=neg.=neg. ÑÑieieååmm (0,0,0)(0,0,0) chocho bôbôûûii giagiaùù tròtrò ss aâmaâm ÑÑieieååmm (4,0,0)(4,0,0) chocho bôbôûûii giagiaùù tròtrò ss ddööôngông,, MaMaëëtt ngoangoaøøii cucuûûaa mamaëëtt cacaààuu mangmang giagiaùù tròtrò ddööôngông

(0,0,0) (4,0,0)R=3

ChieChieààuu cucuûûaa Surfaces (Surfaces (tttt))1)1) ToaToaùùnn ttöûöû giaogiao (intersection):(intersection): VVíí duduïï:: HHììnhnh beânbeân moâmoâ tataûû momoäätt cellcell teânteân lalaøø cell 1,cell 1, lalaøø phaphaàànn

khoângkhoâng giangian bòbò baobao phuphuûû bôbôûûii 44 mamaëëtt bieânbieân. MCNP. MCNP ññònhònhnghnghóóaa cellcell theotheo toatoaùùnn ttöûöû giaogiao nhnhöö sausau::11 --0.998 10.998 1 --22 --3 43 42 02 0 --1 :2 :3 :1 :2 :3 :--44Cell 1Cell 1 chchöùöùaa vavaäätt chachaáátt lalaøø phaphaàànn giaogiao cucuûûaa::VuVuøøngng phphííaa treântreân mamaëëtt 1 (1 (dadaááuu +)+)VuVuøøngng tratraùùii cucuûûaa mamaëëtt 2 (2 (dadaááuu --))VuVuøøngng ddööôôùùii cucuûûaa mamaëëtt 3 (3 (dadaááuu --))VuVuøøngng phaphaûûii cucuûûaa mamaëëtt 4 (4 (dadaááuu +).+).

1

24

32

1

ChieChieààuu cucuûûaa Surfaces (Surfaces (tttt))2)2) ToaToaùùnn ttöûöû hôhôïïpp (union):(union): mangmang kykyùù ttöïöï :: ññaaèèngng trtrööôôùùcc

sosoáá cellcellcell 1 1cell 1 1 --22 --3 43 4cell 2cell 2 --1 :2:3:1 :2:3:--44 1

24

3

1 2

ChieChieààuu cucuûûaa Surfaces (Surfaces (tttt))3)3) PhaPhaàànn bubuøø (complement):(complement): mangmang kykyùù ttöïöï ## ññaaèèngng

trtrööôôùùcc sosoáá cellcellcell 1 1cell 1 1 --22 --3 43 4cell 2cell 2 --1 :2:3:1 :2:3:--44cell 2cell 2 nanaèèmm ngoangoaøøii cell 1 (complement)cell 1 (complement) vavaøø ñöñöôôïïccññònhònh nghnghóóaa::cell 2 2 0 #1cell 2 2 0 #1

1

24

3

1 2

Data CardsData Cards LoaLoaïïii vvíí duduïï1.1. NguoNguoàànn (source)(source) sdefsdef2.2. VaVaäätt lielieääuu (material)(material) mm3.3. TalliesTallies ff4.4. SoSoáá hahaïïtt gieogieo (problem cutoff)(problem cutoff) npsnps5.5. ÑÑooää quanquan trotroïïngng (variance(variance redutionredution)) imp:pimp:p

MnMn CardCardoo PhaPhaàànn nanaøøyy trtrììnhnh babaøøyy moâmoâ tataûû vavaäätt lielieääuu ñöñöôôïïcc lalaáápp ññaaààyy

trongtrong cell:cell:CuCuùù phaphaùùpp:: ZAIDZAID11 fractionfraction11 ZAIDZAID22 fractionfraction22

ZAIDZAIDii ==ZZZAAA.nnXZZZAAA.nnX,, vôvôùùii ZZZZZZ lalaøø nguyeânnguyeân ttöûöûsosoáá, AAA, AAA lalaøø nguyeânnguyeân ttöûöû sosoáá,, nnnn lalaøø tietieáátt diedieäänn ttööôngôngtataùùcc, X, X lalaøø loaloaïïii hahaïïtt ññeeáánn..

oo VVíí duduïï:: 92235 8016 29000 (Cu)92235 8016 29000 (Cu) ZAID=74182.01nZAID=74182.01n moâmoâ tataûû ññooààngng vòvò 182182WW ZAID=74000.01nZAID=74000.01n moâmoâ tataûû nguyeânnguyeân totoáá tungsten.tungsten.

MnMn Card (Card (tttt))oo FractionFractionii:: pos=atomic fraction ofpos=atomic fraction of ZAIDZAIDii

negneg=weight fraction of=weight fraction of ZAIDZAIDii

oo NeNeááuu babaøøii toatoaùùnn khoângkhoâng lieânlieân quanquan ññeeáánn neutron,neutron,AAAAAA cocoùù thetheåå vievieáátt 000000 vavaøø nnXnnX boboûû ññii, MCNP, MCNPkhoângkhoâng phaânphaân biebieäätt gigiööõaõa nguyeânnguyeân totoáá thieânthieân nhieânnhieân vavaøøññooààngng vòvò,, chchææ bòbò aaûûnhnh hhööôôûûngng bôbôûûii mamaäätt ññooää vavaäätt lielieääuu..

oo Fraction:Fraction: moâmoâ tataûû thathaøønhnh phaphaàànn sosoáá hahaïïtt trongtrong momoäättphaânphaân ttöûöû hayhay momoäätt ññônôn vòvò vavaäätt lielieääuu,, totoåångng cacaùùcc thathaøønhnhphaphaàànn babaèèngng 1.1.

MnMn cardscardsCuCuùù phaphaùùpp:: ZAIDZAID11 fractionfraction11 ZAIDZAID22 fractionfraction22

ZAIDZAIDii ==ZZZAAA.nnXZZZAAA.nnX,, vôvôùùii ZZZZZZ lalaøø nguyeânnguyeân ttöûöû sosoáá, AAA, AAAlalaøø nguyeânnguyeân ttöûöû sosoáá,, nnnn lalaøø tietieáátt diedieäänn ttööôngông tataùùcc, X, X lalaøø loaloaïïii hahaïïttññeeáánn..

VVíí duduïïm1 1001 2 8016 1m1 1001 2 8016 1m2 92235.m2 92235.60c60c --0.95 92238.0.95 92238.60c60c --0.050.05m3 82000.m3 82000.02p02p 11

IMP:nIMP:n cardcardTrongTrong moãimoãi cellcell phaphaûûii cocoùù ““importanceimportance””,, ssöûöûduduïïngng chocho ññooää quanquan trotroïïngng trongtrong cell.cell.ÑÑooää quanquan trongtrong cucuûûaa cellcell babaèèngng 00 chchææ cellcell ññooùù ôôûûngoangoaøøii ththööôôøøngng lalaøø 0.0.CoCoùù thetheåå ñöñöaa vavaøøoo trongtrong khokhoááii data carddata card

imp:pimp:p 1 2 4 5r 1 01 2 4 5r 1 0HoaHoaëëcc sausau cacaùùcc mamaëëtt trongtrong cell cardscell cards

2 02 0 --7:8:7:8:--99 imp:pimp:p=1=13 13 1 --1.0 #21.0 #2 imp:pimp:p=0=0

CaâuCaâu leleäänhnhmcnpmcnp i=inp01 o=outp01 . . . [Options]i=inp01 o=outp01 . . . [Options]

1.1. mamaëëcc ññònhònh teânteân file:file:oo INP:INP: teânteân file inputfile inputoo OUTP:OUTP: teânteân filefile ouputouputoo RUNTPE: fileRUNTPE: file chachaïïyy kekeøømm theotheo..2.2. Option:Option:oo i:i: quaquaùù trtrììnhnh chachaïïyy file input (IMCN)file input (IMCN)oo p:p: veõveõ hhììnhnh hohoïïcc (PLOT)(PLOT)oo x:x: tietieáátt diedieäänn ttööôngông tataùùcc (XACT)(XACT)

CaâuCaâu leleäänhnh ((tttt))oo r:r: quaquaùù trtrììnhnh vavaäänn chuyechuyeåånn hahaïïtt (MCRUN)(MCRUN)oo z:z: kekeáátt quaquaûû khikhi veõveõ hhììnhnh vavaøø mamaëëtt cacaéétt cucuûûaa hhììnhnh

(MCPLOT).(MCPLOT).3.3. VVíí duduïï::

mcnpmcnp inpinp=nmtp1 out=nmtp1.o=nmtp1 out=nmtp1.o ipipmcnpmcnp name=nmtp1name=nmtp1mcnpmcnp i=nmtp1i=nmtp1 ixzixz

CaâuCaâu leleäänhnh ((tttt))ORORIGINIGIN VX VY VZVX VY VZ

VòVò trtríí cucuûûaa hhììnhnh veõveõ ñöñöôôïïcc babaéétt ññaaààuu ttöøöø gogoáácc mamaøø tata cocoùùchochoïïnn ttöøöø ññieieååmm ôôûû gigiööõaõa cucuûûaa hhììnhnh veõveõ (VX VY VZ).(VX VY VZ).MaMaëëcc ññònhònh giagiaùù tròtrò 0 0 0.0 0 0.

BABASISSIS X1 Y1 Z1 X2 Y2X1 Y1 Z1 X2 Y2 Z2Z2 hoahoaëëcc Pj = 0Pj = 0HHööôôùùngng veõveõ ññeeåå saosao chocho chiechieààuu cacaùùcc ññieieååmm X1 Y1 Z1X1 Y1 Z1ttöøöø tratraùùii sangsang phaphaûûii vavaøø chiechieààuu cacaùùcc ññieieååmm X2 Y2 Z2X2 Y2 Z2 ttöøöøddööôôùùii leânleân.. MaMaëëcc ññònhònh giagiaùù tròtrò 0 1 0 0 0 1,0 1 0 0 0 1, trutruïïcc YY lalaøøchiechieààuu ttöøöø beânbeân phaphaûûii sangsang vavaøø trutruïïcc ZZ chiechieààuu ttöøöø ddööôôùùiileân.leân. VôVôùùi j lai j laøø trutruïïc X, Y hoac X, Y hoaëëc Zc Z

CaâuCaâu leleäänhnh ((tttt))EXTEXTENTENT EHEH EV hoaEV hoaëëcc EX giaEX giaùù tròtrò

ThangThang chiachia cucuûûaa hhììnhnh veõveõ ññeeåå khoakhoaûûngng cacaùùchch theotheochiechieààuu ngangngang ttöøöø gogoáácc cucuûûaa trutruïïcc totoïïaa ññooää chocho cacaûû beânbeâncacaïïnhnh cucuûûaa hhììnhnh lalaøø EHEH vavaøø khoakhoaûûngng cacaùùchch theotheo chiechieààuuñöùñöùngng cucuûûaa gogoáácc totoïïaa ññooää ññeeáánn ñæñænhnh hoahoaëëcc ññaaùùyy lalaøø EV.EV.NeNeááuu boboûû quaqua EVEV ththìì EVEV cocoùù khuynhkhuynh hhööôôùùngng babaèèngngvôvôùùii HVHV.. NeNeááuu EVEV khoângkhoâng babaèèngng HVHV ththìì ññooàà thòthò seõseõ bòbòbiebieáánn dadaïïngng.. MaMaëëcc ññònhònh giagiaùù tròtrò 100100 vavaøø 100.100.

CaâuCaâu leleäänhnh ((tttt))LALABELBEL S C DESS C DES

ÑÑaaëëtt teânteân cocoùù kkííchch ththööôôùùcc lalaøø SS chocho bebeàà mamaëëtt vavaøø cellcell lalaøøC.C. DuDuøøngng sosoáá llööôôïïngng ññeeåå chchææ DESDES chocho teânteân cellcell. C. C vavaøøDESDES cacaùùcc thamtham sosoáá tutuøøyy chochoïïnn..

la 0 1la 0 1la 0 1 mat.la 0 1 mat.la 0 2 den. (CEL, MAT, IMP,la 0 2 den. (CEL, MAT, IMP,

RHO. . . )RHO. . . )

P3:P3: MoâMoâ tataûû nguonguoàànnNguoNguoàànn totoåångng (SDEF: general source)(SDEF: general source)NguoNguoàànn mamaëëtt (SSR/SSW: surface source)(SSR/SSW: surface source)NguoNguoàànn tôtôùùii hahaïïnn (KCODE: criticality source)(KCODE: criticality source)NguoNguoàànn ññieieååmm (KSRC: source points)(KSRC: source points)UserUser--suppliedsupplied::

naêngnaêng llööôôïïngng ((enenergergyy)) thôthôøøii giangian ((timetime)) hhööôôùùngng ((dirdirection) u v wection) u v w vòvò trtríí ((posposition) x y zition) x y z loaloaïïii hahaïït (typet (type parparticleticle)) trotroïïngng llööôôïïngng ((wweieigghhtt) () (cellcell/surface/surface neneááuu cocoùù))

Source CardSource CardCuCuùù phaphaùùpp:: SDEF source variable=SDEF source variable=giagiaùù tròtrò moâmoâ tataûû

POS = x y zPOS = x y z mamaëëcc ññònhònh 0 0 00 0 0CELCEL sosoáá cellcellERGERG mamaëëcc ññònhònh 1414 MeVMeVWGTWGT mamaëëcc ññònhònh 11PAR n, n p, n p e, p, p ePAR n, n p, n p e, p, p e vavaøø e.e.

VVíí duduïï::SDEF POS=0SDEF POS=0 --4 2.5 CEL=1 WGT=1 PAR=P4 2.5 CEL=1 WGT=1 PAR=P

CaCaùùcc phaphaàànn hoãhoã trôtrôïï chocho source cardsource card1.1. SInSIn cardcard (source information)(source information)CuCuùù phaphaùùpp:: SInSIn option Ioption Iii . . . . .. . . . .IIkk(entries(entries))DoDoøøngng trotroáángng hoahoaëëcc::

n:n: sosoáá phaânphaân boboáá (n=999)(n=999)optionoption h:h: chchææ cellcell nguonguoàànn (histogram bin boundaries)(histogram bin boundaries)

l:l: nhienhieààuu cellcell nguonguoàànn rôrôøøii raraïïcca:a: nguonguoàànn ññieieååmms:s: sosoáá phaânphaân boboáá kekeáá tietieáápp

MaMaëëcc ññònhònh:: SInSIn h Ih Iii . . . . .. . . . .IIkk

VVíí duduïï SInSIn cardcardSDEF ERG=D1SDEF ERG=D1SI1 .01 .1 1 3 14SI1 .01 .1 1 3 14 $ bins$ bins

SDEF POS=D1SDEF POS=D1SI1 L 0 0 0 10 0 0SI1 L 0 0 0 10 0 0 giagiaùù tròtrò x y zx y z

SDEF ERG=D1SDEF ERG=D1SI1 S 3 4 5SI1 S 3 4 5 cacaùùcc phaânphaân boboáá naêngnaêng llööôôïïngng khakhaùùcc

nhaunhau ##

SPnSPn,, SBnSBn cardscards2.2. SPnSPn cardcard (source probability)(source probability)

SBnSBn card (source bias):card (source bias):CuCuùù phaphaùùpp:: SPnSPn option Poption P11. . . . .. . . . .PPkk

hoahoaëëcc SPnSPn f a bf a bn:n: lalaøø sosoáá phaânphaân boboáá

OptionOption=D=D chocho phaânphaân boboáá HH hoahoaëëcc LL treântreân SI cardSI cardPP11. . . . .. . . . .PPkk xaxaùùcc suasuaáátt gigiööõaõa nhienhieààuu nguonguoàànnf, a, b:f, a, b: lalaøø cacaùùcc thamtham sosoáác:c: sosoáá cellcell phaânphaân boboáá ttííchch luyõluyõ..v:v: sosoáá cellcell phaânphaân boboáá ttææ leleää vôvôùùii thetheåå ttííchch..

VVíí duduïï SPnSPn vavaøø SBnSBn cardcardSDEF ERG=D1SDEF ERG=D1SI1 .01 .1 1 3 14SI1 .01 .1 1 3 14SP1 0 2 1 1 6SP1 0 2 1 1 6 (bins probabilities)(bins probabilities)HoaHoaëëccSP1 C 0 .2 .3 .4 1SP1 C 0 .2 .3 .4 1 (cumulative)(cumulative)

SPnSPn,, SBnSBn cardscards3.3. DS cardDS card (dependent source)(dependent source)CuCuùù phaphaùùpp:: DSnDSn optionoptiondodoøøngng trotroáángng hoahoaëëcc::

h: values for continuous distributionh: values for continuous distributioni: discrete valuesi: discrete values

s: distribution numberss: distribution numberst: independent value or dependent valuet: independent value or dependent valueq: independent value or distribution numberq: independent value or distribution number

VVíí duduïï DSnDSn cardcardSDEF POS=D1 ERG=FPOSD2SDEF POS=D1 ERG=FPOSD2SI1 L 0 0 0 10 0 0SI1 L 0 0 0 10 0 0SP1 1 1SP1 1 1DS2 S 3 4DS2 S 3 4SI3 H 2 10 14SI3 H 2 10 14SP3 D 0 .5SP3 D 0 .5 .5.5SP4SP4 --55

P4: Tally cardP4: Tally cardMCNPMCNP cungcung cacaáápp 77 mmöùöùcc ttíínhnh toatoaùùnn neutron, 6neutron, 6 mmöùöùcc ttíínhnh chochophotonphoton vavaøø 44 mmöùöùcc ttíínhnh chocho electron:electron:

DoDoøøngng phaânphaân ttííchch treântreân bebeàà mamaëëttThoângThoâng llööôôïïngng mamaëëtt trungtrung bbììnhnhThoângThoâng llööôôïïngng cellcell trungtrung bbììnhnhThoângThoâng llööôôïïngng ññieieååmm hayhay ññaaààuu dodoøøNaêngNaêng llööôôïïngng trungtrung bbììnhnh ññeeåå lalaïïii trongtrong cellcellNaêngNaêng llööôôïïngng mamaáátt mamaùùtt trongtrong phaânphaân hahaïïchchPhaânPhaân boboáá tataïïoo xungxung trongtrong ññaaààuu dodoøø,, F8:EF8:Echocho ññieieäänn ttííchch giagiaûûii phophoùùngng

F1:NF1:N hoahoaëëcc F1:F1: hoahoaëëcc F1:EF1:EF2:NF2:N hoahoaëëcc F2:F2: hoahoaëëcc F2:EF2:EF4:NF4:N hoahoaëëcc F4:F4: hoahoaëëcc F4:EF4:EF5:NF5:N hoahoaëëcc F5:F5:F6:NF6:N hoahoaëëcc F6:N,F6:N, hoahoaëëcc F6:F6:F7:NF7:NF8:NF8:N hoahoaëëcc F8:F8: hoahoaëëcc F8:EF8:Ehoahoaëëcc F8:F8:,E.,E.

MoâMoâ tataûûKKíí hiehieääuu ttíínhnh toatoaùùnn

Tally card (Tally card (tttt))PhaânPhaân boboáá tataïïoo xungxung trongtrong ññaaààuu dodoøø (F8)(F8)CuCuùù phaphaùùpp:: dadaïïngng ññônôn giagiaûûnn Fn: pl SFn: pl S11. . . .. . . . SSkk

dadaïïngng totoåångng quaquaùùtt Fn:plFn:pl SS11 (S(S22. . .S. . .S33)(S)(S44. .. ..S.S55) S) S66SS77. . . .. . . .

LoaLoaïïii tallytally nanaøøyy chchææ ssöûöû duduïïngng chocho F8F8

P5:P5: ThThöö vievieäänn sosoáá lielieääuu hahaïïtt nhaânnhaân

1.1. BaBaûûngng sosoáá lielieääuu tietieáátt diedieäänn ttööôngông tataùùcc2.2. Mode cardMode card3.3. MnMn cardscards4.4. VVíí duduïï

BaBaûûngng sosoáá lielieääuu tietieáátt diedieäänn ttööôngông tataùùcc

1)1) TTööôngông tataùùcc neutron:neutron: DaDaûûii naêngnaêng llööôôïïngng ttöøöø 1010--1111MeVMeV --> 20MeV> 20MeV SoSoáá lielieääuu lalaøø cacaùùcc chchææ sosoáá ZZ vavaøø AA ÑÑooààngng vòvò hahaïïtt nhaânnhaân biabia ttöøöø 11HH -->> 252252CfCf PhaPhaûûnn öùöùngng ththöùöù cacaáápp phaphaùùtt rara neutron, photon.neutron, photon.

BaBaûûngng sosoáá lielieääuu tietieáátt diedieäänn ttööôngông tataùùcc((tttt))

2)2) Photon: (Photon: (photoatomicphotoatomic)) DaDaûûii naêngnaêng llööôôïïngng ttöøöø 1KeV1KeV --> 100GeV> 100GeV SoSoáá lielieääuu lalaøø chchææ sosoáá ZZ ÑÑooààngng vòvò hahaïïtt nhaânnhaân biabia ttöøöø HH -->> PuPu PhaPhaûûnn öùöùngng ththöùöù cacaáápp phaphaùùtt rara photon, electron.photon, electron.

BaBaûûngng sosoáá lielieääuu tietieáátt diedieäänn ttööôngông tataùùcc3)3) ElectronElectron DaDaûûii naêngnaêng llööôôïïngng ttöøöø 1KeV1KeV --> 1GeV> 1GeV SoSoáá lielieääuu lalaøø chchææ sosoáá ZZ ÑÑooààngng vòvò hahaïïtt nhaânnhaân biabia ttöøöø HH -->> PuPu PhaPhaûûnn öùöùngng ththöùöù cacaáápp phaphaùùtt rara electron, photons.electron, photons.4)4) Photon (photonuclear):Photon (photonuclear): DaDaûûii naêngnaêng llööôôïïngng ttöøöø ngngööôõngôõng ññeeáánn 150MeV150MeV SoSoáá lielieääuu lalaøø cacaùùcc chchææ sosoáá ZZ vavaøø AA ÑÑooààngng vòvò hahaïïtt nhaânnhaân biabia lalaøø 12 (C12 (C--1212 --> Pb> Pb--208)208) PhaPhaûûnn öùöùngng ththöùöù cacaáápp phaphaùùtt rara neutron, photonneutron, photon vavaøø hahaïïtt ttííchch

ññieieäänn

Mode cardMode card

CuCuùù phaphaùùpp:: mode xmode x11. . . x. . . x22

x=n,x=n, ttíínhnh chocho neutronneutronx=p,x=p, ttíínhnh chocho phtonphtonx=n,x=n, ttíínhnh chocho electronelectron

Mode cardMode card mamaëëcc ññònhònh lalaøø nn neneááuu vavaééngng mamaëëtt..

Mode card (Mode card (tttt))CoCoùù thetheåå ttíínhnh kekeáátt hôhôïïpp::

mode n (mode n (mamaëëcc ññònhònh))mode n pmode n pmode n p emode n p emode pmode pmode p nmode p nmode p emode p emode p n emode p n emode emode emode e pmode e pmode e p nmode e p n

ThThöö vievieäänn tietieáátt diedieäänn ttööôngông tataùùcc –– xsdirxsdir filefiledatapathdatapath==c:c:\\mcnpmcnp\\xsxsatomic weight ratiosatomic weight ratios

0001 1.000000 0001 1.0000000001 1.000000 0001 1.0000001000 0.99931697 1001 0.99916732 1002 1.996799661000 0.99931697 1001 0.99916732 1002 1.99679966 1003 2.990139941003 2.99013994. . . . .. . . . .

02/03/200002/03/2000directorydirectory1001.60c 0.999170 endf60 0 1 1 3484 0 0 2.5300E1001.60c 0.999170 endf60 0 1 1 3484 0 0 2.5300E--08081002.60c 1.996800 endf60 0 1 884 2704 0 0 2.5300E1002.60c 1.996800 endf60 0 1 884 2704 0 0 2.5300E--0808. . . . .. . . . .lwtr.01t 0.000000lwtr.01t 0.000000 tmccstmccs 0 1 1 101930 1 1 10193lwtr.02t 0.000000lwtr.02t 0.000000 tmccstmccs 0 1 2562 101930 1 2562 10193lwtr.03t 0.000000lwtr.03t 0.000000 tmccstmccs 0 1 5123 101930 1 5123 10193. . . . .. . . . .

39086.70y 85.177000 super 0 1 1 45739086.70y 85.177000 super 0 1 1 45739087.70y 86.164000 super 0 1 128 69739087.70y 86.164000 super 0 1 128 697. . . . .. . . . .93000.01e 235.011799 el 0 1 12145 47893000.01e 235.011799 el 0 1 12145 47894000.01e 241.967559 el 0 1 12277 47894000.01e 241.967559 el 0 1 12277 478

P6: CAP6: CAÁÁU TRUU TRUÙÙC CHC CHÖÖÔNG TRÌNHÔNG TRÌNHMCNP4C2MCNP4C2

ThThöö mumuïïcc mcnpmcnp chchöùöùaa cacaùùcc ththöö mumuïïcc concon vavaøø cacaùùccfilefile sausau::–– MCNP.EXEMCNP.EXE–– RUN.BATRUN.BAT–– FILEFILE xsdirxsdir–– ThThöö vievieäänn xsxs–– FILE inputFILE input cacaàànn ththöïöïcc hiehieäänn

CHACHAÏÏY MCNPY MCNP

CoCoùù haihai phphööôngông phaphaùùpp ññeeåå chachaïïyy chchööôngông trtrììnhnh MCNPMCNP–– PP1:PP1: chachaïïyy ngoangoaøøii DOSDOS babaèèngng dodoøøngng leleäänhnh ((vvíí duduïï ththöö mumuïïcc

MCNPMCNP trongtrong ooåå C)C) VaVaøøoo StartStartprogramsprogramsAccessoriesAccessoriesCommandCommand PromptPrompt

–– GoõGoõ leleäänhnh cdcd\\ ((neneááuu khoângkhoâng phaphaûûii ooåå cc ththìì goõgoõ leleäänhnh ooåå ñóñóaa::))–– TieTieáápp theotheo goõgoõ leleäänhnh cdcd mcnpmcnp –– SauSau ññooùù goõgoõ leleäänhnh copycopy nmtp.txtnmtp.txt nmtpnmtp (file(file cacaàànn ththöïöïcc thithi lalaøø nmtp.txtnmtp.txt))–– CuoCuoááii cucuøøngng chachaïïyy chchööôngông trtrììnhnh MCNPMCNP babaèèngng leleäänhnh MCNP n=MCNP n=nmtpnmtp

CHACHAÏÏY MCNP (Y MCNP (tttt))

PP2:PP2: ssöûöû duduïïngng run filerun file ñöñöôôïïcc tataïïoo** VaVaøøoo notepadnotepad ññeeåå tataïïoo run filerun file copycopy nmtp.txtnmtp.txt nmtpnmtp mcnpmcnp n=n=nmtpnmtp

•• SauSau ññooùù llööuu filefile cocoùù ññuoâiuoâi .bat (.bat (vvíí duduïï nmtp.batnmtp.bat))•• NhaNhaéépp ññuuùùpp chuochuoäätt vavaøøoo run filerun file ññaõaõ tataïïoo lalaøø chchööôngông trtrììnhnh seõseõ

ththöïöïcc thithi..

BaBaøøii toatoaùùnn::Cell 1Cell 1 bkbk 2 cm2 cm mamaäätt ññooää 1.06g/cm1.06g/cm33

Cell 2Cell 2 hhììnhnh trutruïï chiechieààuu caocao 7.62cm7.62cm ñöñöôôøøngngkkíínhnh 7.62cm7.62cm mamaäätt ññooää vavaäätt lielieääuu 3.67g/cm3.67g/cm33

Cell 3Cell 3 lalaøø khoângkhoâng giangian hhììnhnh cacaààuu bkbk 100cm100cm

Cell 2 Cell 1

Cell 3

XIN CHAÂN THAXIN CHAÂN THAØØNH CANH CAÙÙM ÔNM ÔN