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SHP-1 Shallow-Hole Probe
 Compact size (~31.5-in. long and 2.95-in. diameter)- Weight ~12 lb
- Can withstand 100% humidity, noncondensing
- ~16 hour LN2 holding time
- Available with GEM, GMX or GLP types
- 100-ft operating depth
- Rugged eye hook for cable rigging
The ORTEC Shallow Hole Probe (SHP-1) is designed for surveying shallow
bore holes in and around mine and mill tailing dumps and land fills, formerly utilized
nuclear materials facilities, and other waste management sites. In the waste management
application, high-resolution spectroscopy is desired, dictating the use of a high-purity
germanium (HPGe) photon detector. All germanium detectors require liquid nitrogen (LN2)
cooling to operate. A special compact dewar (thermos vessel) was designed to supply 0.77
liters of LN2 providing approximately 16-hours holding time during operation. This compact
system has a maximum diameter of 2.95 in. (O.D.), which makes it ideal for shallow-depth
bore-hole logging in 3 in. diameter (I.D.) pipes, casings, holes, etc. The entire length
of the SHP-1 is approximately 31.5 in. including detector, H.V. filter, preamp, cooling
cryostat and dewar. The dewar vessel is offset to allow the electronic support cables to pass
within the 2.95-in. maximum diameter. A rugged eye hook, attached to the top of the LN2
fill port, provides the necessary steel cable attachment to enable the entire system to be
dropped into a 3 in. diameter hole to depths of 100 feet. Electronic cables and and an LN2
vent tube are fixed to the steel cable which is then attached to the surface mobile
support van.
All ORTEC HPGe detector types can be supplied in the SHP cryostat. |
