Purpose of the development: The system is designated for in-situ identification of suspicious objects in water or on sea bed to find if these contain any dangerous substances, which can be harmful for human beings or environment (such as explosives, toxic agents, radioactive or fissionable materials) as well as for identification of ore deposits. Options: stand-alone deployment using a cable; ROV deployment; Deployment from deep-water manned submersibles.

Recommended application field: stand-alone deployment using a cable; ROV deployment; Deployment from deep-water manned submersibles.

Advantages over analogues: Nondestructive analysis of suspicious objects underwater; Easy and safe in operation provided by controlled neutron source; System can be used in passive mode as an underwater gamma-spectrometer; Operating depth up to 6000 m; Exposure time from 10 sec to 1.5 hr.

The development stage readiness: Introduced in production

Description of the development:
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The system provides in-situ nondestructive analysis of suspicious objects underwater. A controlled source of neutrons (neutron generator) provides for easy and safe operation. When the neutron source is off the system can be used as an underwater gamma-spectrometer. VARYAG system can be deployed as a stand-alone unit or carried by various manned or remotely controlled submersibles. Different designs of pressure capsules make it possible to use the system at any depth down to 6000 m. The element composition of the investigated object is determined using special-purpose software, which analyses gamma-spectrum of the object and controls instrumentation performance. Exposure time can be varied from 10 sec to 1.5 hr. The system can be operated in cyclic passive mode. The system concept is based on thermal neutron analysis (TNA) and processing of capturing g-spectra produced in the course of (n, g) reaction as a result of interactions between neutrons and nuclei of the object under control. There is a characteristic spectrum of capture g-radiation for every element, basing on which one can identify isotopic composition of the checked object. Comparison of the object spectra under analysis with the radionuclide "library" provides for prompt identification of isotope composition of the object without any damage to the object. VARYAG system consists of two parts: Built-in part: PC with Microsoft Windows 98 SE operation system; software package ALFA-N to analyze characteristic spectra of object and control the system performance; power supply & neutron source control unit. Outboard part: pulse-type neutron generator with neutron energy of 14 MeV and neutron yield of 1.7x108 n/s; detector block comprising scintillation detector NaI(TI) 80x80 mm with pulse analyzer, low-voltage and high-voltage power supply for detector; memory & data transmission block; block for synchronization with pulse neutron generator. The outboard blocks are placed in pressure boxes.

Possibility of transfer abroad:
Licence's sale
Creation of joint enterprise
Realization of finished commodity

Photo

Country Russia

For additional information turn to:
E-mail: gal@uintei.kiev.ua