Mirion Technologies Thru-Wall Endoscope User Manual

Radiation Tolerant
Thru-Wall/Roof
Viewing System

Features

• Standard and wide angle
fields of view with 6:1 zoom
range

• Shields against radiation
shine path

• Modular endoscope system

• 750mm to 2000mm wall/roof
thickness in 250mm steps

• Prism technology in viewing
head for image correction

• Emulates pan and tilt camera
thru-wall

• Remotely controlled via RS485
serial interface

• Full hemisphere viewing

• Non-browning viewing dome
of hot side components

• Tested for 30-year operation

• Control electronics, drive
motors and camera are easily
accessible from cold side

• Designed for ALARA concepts

The IST Through-Wall/Roof Camera (En­doscope) Optical Inspection System is designed for
viewing through the shielding wall of nuclear facili-

Thru-Wall Endoscope

ties such as a “hot cell”. The endoscope relays a view
of the inside of a cell to a CCD camera on the cold
side of the wall.

REES

Imaging & Sensing Technology Corporation

REES Thru-Wall Endoscope

Specifications and Performance

The through-wall/roof camera allows pan/tilt viewing into a nuclear cell.
Control of pan/tilt/zoom, auto iris and focus functions can be either via a
system network or PC. A prism within a non-browning glass dome tilts and
rotates to provide viewing within a hemisphere.

The image is relayed through a special endoscope that incorporates
shielding to avoid the shine path that would otherwise result from a
straight optical path. The camera module, zoom lens, prism/lens motor
drives and video/control interface can be accessed from outside of the
cell. The prism drive mechanism has been designed to be maintenance
free and has been successfully life tested (simulation of 30-year use in a
plant). The dome sealant has passed irradiation, leakage and pressure
tests.

The through-wall/roof camera is installed within a liner system into an
encast liner. The dome, mounted on the outer liner, provides a seal against
contamination and remains in place should the through-wall camera need
to be withdrawn.

The through-wall/roof camera can be installed into a 6.0" diameter encast
liner or into a 10.5” encast liner with a filler liner (Figure 1).

The endoscope is modular in construction so that it can be configured to
suit the wall/roof thickness and shielding characteristics. There are wide­angle zoom and narrow-angle zoom options.

For High Level Waste facilities, the typical wall thickness is 48". In this
case, the camera provides equivalent shielding to the wall. When
configured for a thickness of 30" or less, the effective shielding may be
lower than that provided by the wall and remains compatible with less
severe radiation levels.

Imaging Sensor ................................CCD (monochrome or color)

Angles of View Options

Standard: Zoom out Horizontal 21° Vertical 15° Diagonal 26°

Zoom in Horizontal 3.6° Vertical 2.4° Diagonal 4.8°

Wide Angle: Zoom out Horizontal 48° Vertical 36° Diagonal 58°

Zoom in Horizontal 10.5° Vertical 8° Diagonal 13°

Zoom Range .....................................6:1 for standard and wide-angle

versions

Resolution

Monochrome ............................... Typically 580 TV lines with a minimum

sensitivity of 100 lux at the 21°
horizontal angle of view and 400 lux at
the 3.5°horizontal angle of view

Color ............................................ Typically 380 TV lines with a minimum

sensitivity of 200 lux at the 21°
horizontal angle of view and 800 lux at
the 3.5°horizontal angle of view

Aperture ...........................................Maximum aperture for wide angle

zoom setting f/3
Maximum aperture for narrow angle
zoom setting f/4.5

Direction of view ............................. Prisms provide full 360° rotate and ±

90° tilt of direction of view, allowing
the system a hemisphere of view
while maintaining an upright image

Focus range

Standard angle option ................ 1000mm (40") to infinity

Wide angle option ...................... 200mm (8") to infinity

Iris range ..........................................f/3 to f/22

Spectral Response ........................... 400nm to 700nm.

8

Radiation Tolerance ......................... 1 x 10

rads at the dome

Ambient Temperature ...................... Operating: -10°C to +50°C (14°F to

122°F)
Storage: -20°C to +60°C (-4°F to
140°F)

Electrical/Control Interface

Power ...............................................90-264VAC, 50-60Hz

Video Output ....................................1.0V p-p (NTSC or PAL)

Control ............................................. RS485 serial interface

Imaging and Sensing Technology Corporation

204 IST Center
Horseheads, NY 14845 USA
Tel: [phone]
800-432-1478
Fax: [phone]
E-mail: [e-mail]

1204
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