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2.4 Instrument Description
14
Shielding
The effectiveness of the shielding and the smooth operation
of the lock must be checked every six months!
Measuring frames for Co and Cs sources
are equipped with a
lead-filled steel pipe as shielding, the outer diameter being 105
mm, and a radiation exit channel having a width of 8 mm. When
the exit channel is closed, the radiation hits the steel shielding.
The open radiation exit channel is exactly aligned with the scintilla-
tion counter that is installed on the opposite side.
Measuring frames for Americium sources
do not require such
strict shielding precautions, since the radiation emitted by Ameri-
cium is much easier to shield off.
Radiation exit channel
40 mm
Changing
Distance from
Shielding with rod source
Opening/
the rod
bottom 40 mm
closing the
source
radiation exit
channel
Figure 5: Shielding in foot of measuring frame
On one side of the shielding (see Figure 5) there is the opening for
changing the rod source which is secured by a special lock and a
padlock.
Содержание LB 442
Страница 1: ...Radiometric Bulk Flow Meter LB 442 Id No 32815BA2 Rev Nr 02 10 10 2001...
Страница 2: ......
Страница 117: ...Section 13 Appendix 115 Section 13 Appendix 13 1 Certificates 13 1 1 ATEX Certificate for Evaluation Unit...
Страница 118: ...13 1 Certificates 116...
Страница 119: ...Section 13 Appendix 117...
Страница 120: ...13 1 Certificates 118...
Страница 121: ...Section 13 Appendix 119...
Страница 122: ...13 1 Certificates 120 13 1 2 ATEX Certificate for Detector...
Страница 123: ...Section 13 Appendix 121...
Страница 124: ...13 1 Certificates 122...
Страница 125: ...Section 13 Appendix 123...
Страница 126: ...13 1 Certificates 124 13 1 3 ATEX Certificate for Wall Housing...
Страница 127: ...Section 13 Appendix 125...
Страница 128: ...13 1 Certificates 126...
Страница 129: ...Section 13 Appendix 127 13 1 4 Declaration of Conformance...
Страница 132: ...13 3 Tachometer Installation 130 13 3 Tachometer Installation...
Страница 133: ...Section 13 Appendix 131...
Страница 134: ...13 3 Tachometer Installation 132 13 3 1 Tachometer...
Страница 138: ...13 4 Mechanical Drawings 136 13 4 4 Free Fall Measurement...
Страница 139: ...Section 13 Appendix 137 13 4 5 Point Detector...
Страница 145: ...Section 13 Appendix 143 13 4 11 Evaluation Unit...
Страница 148: ...13 5 Wiring Diagram 146 13 5 3 19 Frame...