Download - Albert Tsutskikh Anatoli Krasilnikov Yuri Kaschuck Denis Prosvirin SRC RF TRINITI 11 of April 2006
Albert TsutskikhAnatoli Krasilnikov
Yuri KaschuckDenis Prosvirin
SRC RF TRINITI11 of April 2006
Status of Vertical Neutron Status of Vertical Neutron Camera IntegrationCamera Integration
VNC Purposes
• Collimated measurements of neutron source profile with spatial resolution along ITER major radius
• Total neutron yield (fusion power) measurement
• Optimization of the schemes of additional heating, including ICRH in particular
VNC Plasma Coverage
Collimator lengths 1,4 – 1,6 m
Diameters 30 mmCoverage from –0.7 to 0.7 ρ
Divertor Port #2 Arrangement Drawing
Blanket module #18
Divertor cassette
Neutron collimator block
Detectors modules
3D view
Removable Rail Part with collimator block
Added block part for diverter
Detector modules
MCNP – A General Monte Carlo N-Particle Transport Code
• Program MCNP (Transport Methods Group Los Alamos National Laboratory)
• Version 4C• Cross-section library “endf601” (Evaluated Nuclear Data File)
MCNP Model of ITER
CoilsIntercoil structure
Collimator Block
Blanket module #18 with slot
Diverter Cassette with block part
MCNP Model of ITER
MCNP Model of ITER
MCNP Model of VNC
Model of Source
2
1
arf
Source spatial distribution
En=14.1 MeV
Source density distribution
0
0,2
0,4
0,6
0,8
1
-200 -100 0 100 200
Minor radius, cm
Rela
tive
dens
ity
Calculation results
signal/backgroundchannel no. FC NDD
1 0,224 4,2242 8,212 27,9743 15,703 53,4364 22,454 55,1275 28,841 95,3436 23,312 97,1527 8,684 28,7778 4,007 10,9409 2,525 8,712
10 0,829 3,528
Calculation resultsfor U-238 FC, threshold – 1 MeV & NDD, threshold 7 MeV
signal/bacnground ratio for VNC ITER
010
2030
4050
6070
8090
100
1 2 3 4 5 6 7 8 9 10channel no.
signa
l / ba
ckgr
ound
ratio
FC NDD
Signal – flux of nonscattared neutrons, Signal – flux of nonscattared neutrons, background – flux of scattered neutronsbackground – flux of scattered neutrons
Calculation results
Neutron Distribution in Channel
1,00E-16
1,00E-13
1,00E-10
1,00E-070 2 4 6 8 10 12 14 16
En, MeV
Neut
ron
flax
(n cm
2 s-1 /sour
se n
eutro
n) # 1
# 2
# 3
# 4
# 5
# 6
# 7
# 8
# 9
# 10
New Problem #1From L. BertalotInterface Divertor cassette – Interface Divertor cassette – Rail (second part of collimator Rail (second part of collimator block)block)
New Problem #2
Need to verify if complete assembly fits inside the cask
From L. Bertalot
New Problem #3
Fixed to the Cassette Body
From L. Bertalot
New Problem #4
Integrates the Rail
Integrates the Locking Pins
From L. Bertalot
Conclusions• Lengths of collimators are enough for effective
VNC operation. Correction coefficient should be applied for channel #1 & #10.
• Integrated with divertor cassette Lower VNC is providing required collimation and plasma coverage for both (238U FC, NDD) discussing detectors.
• Interface issues (integration with divertor cassette, interface with removable rail part and blanket module) could be solved during further design activity.
• Procedure of assembling and installations• Tools for installation• Mechanical prelifting construction and other modification
divertor cassette • Alignment and calibration• Mechanical details of rail• Agreement of blanket module # 18 modification to provide
VNC lines of site penetration• Interfaces with other port diagnostics • Cable connections and communications • Analysis of tomography possibilities with discussing RNC
and VNC lines of sight
MUST BE SOLVED