Mofani oa litsebi oa ho lemoha mahlaseli

Lilemo tse 18 tsa Phihlelo ea Tlhahiso
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RJ12 letoto la mofuta oa batho ba tsamaeang ka maoto, lisebelisoa tsa ho shebella mahlaseli a marang-rang

Tlhaloso e Khutšoanyane:

RJ12 motsamai ka maoto le thepa ea ho shebella mahlaseli a kotsi ke sesebelisoa sa ho shebella batho ba tsamaeang ka maoto le thōtō. E na le litšoaneleho tsa kutlo e phahameng, mefuta e mengata ea ho lemoha le nako e khuts'oane ea karabelo, 'me e khona ho lemoha alamo ea othomathike ea radiation, polokelo ea data ea othomathike le mesebetsi e meng. Sistimi ea boikhethelo ea ho lemoha sefahleho, e kopantsoeng le sistimi ea ho beha maemo ka boiketsetso, e ka fumana batho ba belaelang sebakeng seo ho shebiloeng ho sona. E ka sebelisoa libakeng tse fapaneng tsa liteishene tsa ho kenya le ho romella kantle ho naha, joalo ka moeli oa naha, boema-fofane, seteishene sa terene, seteishene sa metro, mabenkele a mabenkele, jj.


Lintlha tsa Sehlahisoa

Li-tag tsa Sehlahisoa

tšobotsi ea tekheniki

① The BIN (Boitsebiso ba Background Identification of Normal) bo iphapanyetsa theknoloji

② MCA multispectrum analyzer, tšobotsi ea SIGMA lipalo algorithm

③ mosebetsi oa NORM (40K) Phapang ka potlako lipakeng tsa li-nuclide tse tloaelehileng tsa maiketsetso le tsa tlhaho (mohlala40K232T)

④ Ts'ebetso ea tlhokomeliso ea Nuclide (e nang le probe ea sodium iodide / boikhethelo)

⑤ Ho kopanya sesebelisoa sa sodium iodide le MCA multichannel energy spectrometer analyzer ho ka khetholla ka nepo lipakeng tsa li-nuclide tsa bongaka, li-nuclide tsa indasteri le li-radionuclide tsa tlhaho.

Nuclide ea tlhaho 40K226Ra,232Th
Nuclide ea indasteri 241Ke,137Cs60Co,57Co,22Na,133Ba,54Mong,88Y
Li-nuclide tsa bongaka 131ke,201Tl,203Hg,18F99mTc,99Mo,192Ir
Lisebelisoa tse khethehileng tsa nyutlelie 57Co,152EU,238U

⑥ Sampling ea lebelo le holimo (ka potlako: 200ms)

 Lipontšo tsa mantlha tsa tekheniki tsa detectors

lebitso la morero Boitsebiso ba parameter
Mefuta ea li-detectors Plate scintillator ea polasetiki + lerata le tlase la photomultiplier tube
Molumo oa detector 5,10,15 ea boikhethelo e nang le li-probe tse peli (probe ea kamehla ea mamati)
Sekhahla se phahameng sa ho pasa 106cps
sebaka sa matla 25kV ~ 3MeV
kutloelo-bohloko m5000cps / (Sv / h) (10 L, mong ka137Cs)
Moeli o tlase oa ho lemoha Bokhoni ba ho bona mahlaseli ka holimo ho semelo sa 5nSv / h
Ho ea ka khetho, tube ea neutron
  • Mofuta oa probe: bophelo bo bolelele3He neutron detector (1 sepakapaka kapa khatello ea boikhethelo)
  • Mefuta ea matla: 0.025eV (neutron e chesang) ~ 14MeV
  • Palo ea bophelo: 1017Palo
  • Sebaka se sebetsang hantle sa sebaka sa ho lemoha: 50mm 600mm, 25mm 600mm, 57mm 1054mm ke khetho;
  • Sensitivity: 75 cps / Sv / h (e amanang le e 'ngoe) m252Cf)
  • Palo e tlase: <5cps
Kamohelo ea khetho ea dinnuclide
  • Mofuta oa detector: France SAN Gobain detector e ngata ea sodium iodide + low potassium quartz photomultiplier tube
  • Molumo oa detector: 1 l, 2 l khetho, e nang le lisebelisoa tse peli
  • Sekhahla se phahameng sa ho feta: 106cps
  • Matla a fapaneng: 25keV ~ 3MeV
  • Boikutlo: 20,000 cps / (Sv / h) (2 L, kamano137Cs)

Matšoao a mantlha a tekheniki a sistimi

1. Ts'ebetso e tsitsitseng ea ho lemoha (AB)

A. Ts'ebetso e tsitsitseng ea ho lemoha ha mokhoa oa ho beha maoto leihlo

mohloli oa radioactive Matla a ka sehloohongkev

Katleho e tsitsitseng ea ho lemoha

Sekhahla sa lethal dose ho 1.5m / (nSv.h-1/MBq
s-1/MBq s-1/(nSv.h-1)
241Am 60 ≥220 ≥94 2.3
57Co 122,136 ≥840 ≥90 9.3
137Cs 662 ≥960 ≥23 42
60Co 1173,1332 ≥1800 ≥11 160
133Ba 3,181,302,356 ≥1680 ≥73 23

tšela:

1. Mohloli o tloaelehileng oa tlhahlobo ea 252Cf neutron o nang le mohloli o matla oa nyutrone oa 12000 / s (1 ± 20%) o behiloe sebakeng sa sebaka sa boitsebiso ba detector.

2. Sekhahla sa palo ea neutron se tla kopana le tlhoko ea sekhahla sa ho bala sa> 100 (1 ± 20%) / s.

Ts'ebetso e tsitsitseng ea ho lekola sephutheloana sa B-row

mohloli oa radioactive Matla a ka sehloohongkev

Katleho e tsitsitseng ea ho lemoha

Sekhahla sa lethal dose ho 1.5m / (nSv.h-1/MBq
s-1/MBq s-1/(nSv.h-1)
241Am 59.5 ≥480 ≥92 5.2
57Co 122,136 ≥2400 ≥114 21
137Cs 662 ≥2640 ≥28 95
60Co 1173,1332 ≥5760 ≥16 360
133Ba 3,181,302,356 ≥4560 ≥88 52

2. Boikutlo ba ho lemoha

Sistimi ea ho lekola ba tsamaeang ka maoto le sistimi ea ho beha leihlo liphutheloana

Motho ea tsamaeang ka maoto: Monyetla oa ho fumanoa f 90% lebelo v=1.2m/s

Sephutheloana sa mela: probability probability f 90% speed v=1m / s

mohloli oa radioactive Ketso kapa boleng
137Cs 0.08MBq
60Co 0.02MBq
241Am 2.27MBq

3. Ts'ebetso e khahlanong le tšitiso ea sesebelisoa sa neutron

Ha mohloli oa 60Co o hlahisa sekhahla sa lethal dose setsing sa jiometri sa "neutron detector" holim'a sistimi ea ho shebella, e kholo ho feta 120 Sv / h, sistimi ea ho beha leihlo ha ea lokela ho tsosa alamo ea neutron.

4. Sekhahla sa alamo ea bohata: 0.01% (, neutron)

Monyetla oa alamo ea sistimi ea ho lemoha e bakoang ke lintho tse se nang radioactive kapa tseo e seng tsa SNM

5. litšobotsi tse feteletseng

Ha tekanyo ea lethal dose ea detector e feta 120 Sv / h, sisteme ea ho beha leihlo e tla boloka boemo ba alamo ebe e khutlela sebakeng se ka morao, mme nako ea tokollo ea alamo e ka tlase ho 60s.

6. Ho tsitsa ha maikutlo

Ka har'a sebaka sa ho lemoha

Batsamai ka maoto ± 25% Line Pack ± 25%

Matšoao a mantlha a tekheniki bakeng sa boitsebahatso ba nuclide (ka boikhethelo)

Sekhahla sa Misalarm

Sebakeng se tsitsitseng:

Sebelisa sensor ea sebaka, makhetlo a 10000, sekhahla sa alamo ea bohata 1

Ntle le ho sebelisa sensor e lutseng, sekhahla sa alamo ea bohata le sekhahla sa ho se tsebe hantle se sebelisoa hang ka nako ea 12h

γ Karabelo ea Mahlaseli

Sebelisa makhetlo a 50, alamo makhetlo a 49

Halefile

Ho feta 100 v S / h, alamo e phahameng ea mahlaseli e hlahisoa ebe e tlosoa ka hare ho 1min ka mor'a hore mohloli o tlohe.

Alamo ea neutron e bakoang ke mahlaseli

Ha ho alamo ea neutron e hlahisoang ha sekhahla sa lethal dose ea γ-ray se fihla ho 100 Sv / h.

Tšusumetso ea bokamorao

Ha phetoho ea bokamorao e le kholo ho lekana ho baka phetoho e kholo monyetla oa alamo, sistimi ea ho beha leihlo e tla fana ka tlhokomeliso.

Tsebo ea Nuclide

Nuclide ea tlhaho 40K226Ra,232Th
Nuclide ea indasteri 241Ke,137Cs60Co,57Co,22Na,133Ba,54Mong,88Y
Li-nuclide tsa bongaka 131ke,201Tl,203Hg,18F99mTc,99Mo,192Ir
Lisebelisoa tse khethehileng tsa nyutlelie 57Co,152EU,238U

Tlhokomeliso: Boitsebiso ba Nuclide le nyutrone ke khetho ea boikhethelo, eseng tsamaisong e tloaelehileng

Mokhoa oa tsamaiso

图片1

Setšoantšo sa 1. Tlhokomelo ea mahlaseli a liphutheloana le ba tsamaeang ka maoto

图片2

Setšoantšo sa 2. Lisebelisoa tsa ho shebella mahlaseli a maoto a maoto


  • E fetileng:
  • E 'ngoe: