Fission Chambers general info.
Fission Chambers
Fission chambers
provide a very large pulse from a neutron induced reaction and can be
used in either pulse or direct current mode. When used in pulse mode non-neutron
pulses can be discriminated against fairly easily, even at low neutron
fluxes. This makes them ideal for use in high mixed fields, such as encountered
near a nuclear reactor as part of In-core or Ex-core nuclear instrumentation.
Small fission chambers, such as the Centronic FC4A, are designed for flux
scanning in narrow tubes in the region of fuel elements. DC fission chambers
have a longer lifetime than boron ion chambers; due to the fission coating
not burning up as quickly as the boron coating. However, fission product
activity limits the dynamic range of DC fission chambers, typically to
the top 2 decades of reactor power.
| TYPE | OPERATING TEMP (°C) |
NEUTRON SENSITIVITY (cps/nv) |
OPERATING VOLTAGE (V) |
DIMENSIONS |
APPLICATIONS |
|
DIAMETER (mm) |
LENGTH |
|||||
| FC4A | 250 | 3e-3 | 500 | 6.2 | 45.5 | General Purpose Pulse Chamber |
| FC144 | 225 | 0.0011 to 0.11 | 250 | 25.4 | 170 | General Purpose Pulse Chamber |
| FC165 | 200 | 0.12 | 400 | 30 | 152 | General Purpose Pulse Chamber |
| FC216 | 250 | 0.16 | 500 | 24 | 267 | General Purpose Pulse Chamber |
| FC330 | 140 | 0.25 | 500 | 89 | 630 | MAGNOX Pulse Chamber |
| FC538 | 550 | 0.5 to 1.8 | 400 | 47.5 | 551 | General Purpose Pulse Chamber |
| FC550 | 200 | 0.5 to 0.85 | 500 | 37 | 257 | General Purpose Pulse Chamber |
| FC765 | 300 | 1.0 | 500 | 77 | 337 | General Purpose Pulse Chamber |
| FC1400 | 200 | 1.16 | 500 | 50.8 | 700 | General Purpose Pulse Chamber |
Due to our policy of continued development, specifications are subject to change without notice.