Instrumentation and equipment have been delivered for ensuring environmental safety of marine structures and radiation stealth of nuclear submarines under design.

VARYAG-CHS system

VARYAG-CHS is intended to be used by the Navy and Emergencies Ministry in potentially hazardous waters to identify in-situ explosive, poisonous and radioactive materials that might be contained in suspicious objects on seabed and in mid-water. The system is based on the nuclear physical method of neutron radiation analysis.

Configuration:

Onboard equipment:

• Onboard computer;
• Power supply and neutron generator control unit;
• Power supply & switching unit;
• Deck cable;

Outboard equipment:

• Neutron generator in watertight casing;
• Gamma-ray spectrometer in watertight casing;
• Underwater cable.

Detection capabilities:

RPN 09

RPN 09 is a set of instrumentation designed for measuring neutron flux and gamma radiation intensity on outer hull surfaces of nuclear submarines and ships.

The main purpose is to test ships for compliance with requirements regarding their joint deployment and environment safety.

Measurement range::

Submerged gamma-ray spectrometer EKО-10

EKО-10 is a multi-purpose submerged highly sensitive gamma-ray spectrometer based on a scintillation ∅76×76 mm BGO crystal (bismuth germanate)

The spectrometer is designed to measure the volumetric activity of water in-situ or detect gamma emitting sources in suspicious objects underwater.

Main data:

• Detection, identification and measurement of volumetric activity of gamma-emitting radioactive substances dissolved in sea water at volumetric ¹³⁷Cs activity exceeding 500 Bq/m³;
• Detection and identification of gamma-emitting point sources in underwater objects at distances up to 30 cm with the equivalent ¹³⁷Cs activity exceeding 10⁴ Bq (without special shielding);
• Indication of equivalent gamma radiation intensity underwater in the range from 1 nSv/h to 10 µSv/h;
• Measurement range of volumetric activity of ¹³⁷Cs radionuclide in sea water (salinity 35 ‰) is 5•10²–3•10⁶ Bq/m³.

Two operation modes:

• Off-line – sensors run on own battery power supply and store data on flash memory;
• On-line – data continuously transmitted from sensors to onboard computer.

The spectrometer can be deployed from ROV, surface ships or deep-water submersibles. It can be used for measurements in wells, tanks, ponds or any other water bodies as well.

Ex measuring tools type approval certificate RU.C.38.001.A № 53501.

Soil core sampler

Soil core sampler of Niemisto corer type (Н-2) is intended for coring intact surface layers of bottom sediments and sampling bottom water.

The device has an inserted corer with a clever seal along with a special-purpose stabilizer foil keeping the sample intact and sealed while it is pulled to surface.

The internal barrel is made of a robust transparent material enabling visual inspection of a sample during examination of its geological composition and easy sample slicing.

The core sampler includes an extractor with a dosing nozzle for slicing and analyzing bottom sediment samples.

Main data:

SOVA-01М

SOVA-01 М is a system designed for automatic detection of explosives in personnel belongings of visitors and personnel at access check points of protected areas, buildings and offices. The inspected items can be cases, bags, packages, small-size electronic devices and gadgets not larger than 500×400×130 mm. The system is also able to detect fission and radioactive materials.

The system is running automatically and gives conclusions without operator’s intervention, no special qualifications are required to run the system.

Average exposure in the measuring cell is within 1.5 µGy and has no detrimental effect on industrial products or light sensitive materials that might be contained in the inspected luggage.

Main data:

Minimum detectable weight of explosives (nitrogen containing materials — at least 30%)

• 100 g at exposure time within 100 s (average time of measurement in no-explosives case — 30 s);
• 200 g average time of exposure of 30 s;
• 40 g in case of explosive detection in mobile phones using special attachment at exposure time within 120 s;

Probability of correct detection (Р_по) — 95%, false alarm probability (Р_лт) – less than 1% (when the inspected items do not contain more than 30 g of concentrated nitrogen mass);

Minimum detectable mass of fission material (U-235) — 3 g at exposure time within 10 s and preliminary irradiation time of not less than 30 s;

Minimum detectable activity of Cs-137 radionuclide — 5 kBq at exposure time within 10 s;

Equivalent radiation intensity at 1 m distance from the system surface not more than 1 µSv/h;

Neutron source – neutron generator with neutron flux 2•10⁷ n/s;

Dimensions – 2400×1300×1500 мм;

System weight —not more than 2000 kg;

Maximum size of inspected objects – 500×400×130 mm;

Power supply – one phase ~220 V, 50 Hz;

Power consumption – within 0.5 kW;

Continuous operation  – 8 h.

Radioactive trail monitoring system (Karniz)

Karniz radioactive trail monitoring system is designed for the Russian Navy to monitor ship’s radiation signature as well as to take prompt measurements to enable long-term forecasting of radiation conditions in waters.