Diakont - Model D40 -Inspection Camera
The D40 offers the perfect mix of high resolution, small size, and high radiation tolerance. Due to its compact diameter of just 1.58”, the camera is perfectly suited for inspection of confined areas and in reactor components.
- 1 MegaRads/hr and 200 MegaRad radiation tolerance total
- Solid State Design
- 600+ TVL video resolution, easily meets VT-1 and EVT-1
- Compact 1.58″ diameter form factor
- Wide range of view heads for various applications
- Designed for maintainability – “plug and play” factory tune replacement tube
“We attached the D40 to poles and were maybe 5 to 10 feet from fuel. We used it for serial identification, and we had a drop light on in the core with the D40’s ring light. It was very easy to read the numbers. The D40 is an excellent camera for this application.” – US Nuclear Plant Reactor Engineering Supervisor.
Considered by many to be the golden standard of radiation-resistant cameras, Diakont’s D40 System offers the perfect mix of high resolution, small size, and high radiation tolerance—all characteristics required for precise performance in extreme environments.
Due to its compact diameter of just 1.58″, this camera is perfect for inspecting confined areas like reactor component interiors. Its modular design and range of attachments make it the ideal “utility camera.” With the ability to reconfigure, it supports all types of plant operations and maintenance. This flexibility offers users the highest level of economy and the best value for their investment.
The D40 camera offers an integrated system solution with a camera, processing system, and user interface. Due to its innovative technology and proven reliability, the system has won deserved popularity from nuclear power plant builders, contractors, and operators worldwide. Thousands of systems have been deployed in the United States, Japan, France, Finland, and other countries.
Unlike bulkier shielded cameras, the D40’s optimized split-head design makes it exceptionally condensed and naturally radiation resistant. Minimal electronics are inside the camera, as most components are housed in the topside Camera Control Unit (CCU).
Like all of Diakont’s products, the D40 is designed and manufactured to stringent quality standards. All stages of the production cycle go through factory acceptance testing and are verified through Diakont’s ISO 9001 certified Quality Management System. Radiation testing is also required on all components and completed camera systems to ensure the highest quality camera is produced.
State-Of-The-Art Capabilities
In addition to its wide range of standard functions, the D40 incorporates several superior capabilities unmatched in competitor solutions, including:
- Smooth 2x analog zoom
- Auto Exposure function for automatic image quality enhancement
- Stabilized radial viewing
- Ease of maintenance
Extreme Versatility
Its small size, and intuitive design make it easy to use in water and air environments, as it is perfect for accessing tight spaces. The operator can perform axial, lateral, and circular scanning utilizing a range of lenses and attachments. During inspections, the camera is “puppeteered” into position, allowing it to access hard-to-reach locations thanks to its cable; it can also be maneuvered with the pan/tilt or a robotic manipulator. Common applications include:
- IVVI of BWR reactor internals
- PWR MRP Reactor Vessel inspections
- Control rod blade inspection while within the loaded reactor core
- Inspection of irradiated fuel cladding
- Below-core plate FOSAR operations
- Spent fuel cask loading operations
- Decontamination and decommissioning activity surveillance
- Hot cell surveillance

