Fluke Biomedical 875 Victoreen - Manual (Page 17)

Victoreen 875 High Range Containment Monitor
Operator Manual
2-2
The distance from the p
e detector cables. Additional information is found in the paragraph below Cable Sealing and in CABLE-
l box cover must be bolted shut. To bolt the pull box
878-12-3 in Appendix B. Pull box material type and grade is
Specifications for Cable 878-1-9
Conductor
el (BIWF)
7.49 mm)
the sealing method used during the qualification test. Stainless
s long (with welded Swagelok connectors)
be installed between the dete ainless steel tubing (¾ inch diameter) should be
the pull box to the pen . If a common stainless steel tubing run is
eter tube is recommen
NOTE
Seismic su technique at
penetration requirements.
Technique e customer's
responsibilit
inless steel tubing to th ings (¾ inch) and, after finger
hten at least 1-¼ turns. Th installed in the same
ctor end of the flex nnector backshell. This should not be
ed and tested. edure Cable-877, in Appendix B, for more
NOTE
Under potential L.O.C.A. conditions of pressure and
temperature, the cable may expand as much as 11
inches per 100 feet.
ull box to the detector will be determined by the amount of flex hose used to seal
th
877 and 878-12-3 procedures in Appendix B.
Once the cables have been pulled and tested, the pul
shut, follow the steps outlined in procedure
304 stainless steel.
Cable Sealing
In-containment cable is 878-1-9. This is special cable designed to withstand the potential high radiation
that may exist following a L.O.C.A. or similar event. In order to withstand the high pressure and moisture
generated during such an event, the entire cable length must be sealed so that moisture will not come in
contact with the cable. Cable specifications are listed below.
#24 AWG, 19/36 Tinned Copper
Insulation Tefz
Shield #36 AWG, Tinned copper brand, 90 % Coverage
Jacket Tefzel (BIWF)
Outside Diameter 0.250 to 0.295 in
(6.35 to
Impedance 75 ohms nominal
Capacitance 22 pf/ft nominal
Dielectric Strength 7000 V minimum
Operating Voltage 2300 V maximum
The following guidelines are based on
lex Hose 878-12-30, ¾ inch d steel F iameter x 18.5 inche
should ctor and pull box. St
installed from etration for each cable
used, a one (1) inch diam ded.
pport and the sealing
vary with plant
s and materials used are th
y.
Attach the sta
e pull box with compression fitt
tightening, tig e flex hose connection at the pull box is
manner. The dete hose is swaged to the cable co
done until cable is pull (Refer to the proc
information.)