Vapormatt Group - Decomatt Machine (For Nuclear / Radioactive Decontamination)

Decomatt

Decomatt System

Decomatt is today's answer for cleaning and decontaminating radioactive parts and equipment in nuclear establishments.

Proven in nuclear power stations throughout the world, liquid abrasive decontamination provides for, controlled cleaning and free release of components, tools and parts for reuse or for conventional disposal. Decomatt is a must for your volume reduction program.

Decomatt's principal is the bombardment of components or equipment with a high-volume recirculated flow of solid particles in water. The solid media stainless steel, aluminium oxide or glass beads does the decontamination work, but there is always a cushion of water between the component surface and the media particles. This prevents impregnation, surface damage and excessive breakdown of the media while removing the fixed or smearable contamination.

Design

Unlike other equipment the Decomatt System contains all pressured abrasive delivery lines within the cabinet to completely eliminate the danger of leakage as a result of system failure. In addition, the design minimizes space required which is at a premium in nuclear plants. This design maximizes the equipment which can be placed within your decon shop.

The Decomatt pump mounts through the sump wall so that the pump itself is submerged. This unique pump features a packingless, glandless design and utilizes a water seal for long life. It was specifically designed for the Decomatt System and is not a commercial pump adapted for this purpose.

Due to the compact design of the Decomatt pump it is possible to provide multiple sump units. This allows us to design and build large walk-in booth units in areas with low ceiling clearance.

Decomatt - Nuclear Safety Engineered Into Each System

•	System uses approximately 50 gallons of water and 75 pounds of inert abrasive - low waste volumes.

•	Cyclone separators, using automatic valves, remove solids from the slurry down to five microns.

•	Glove box stations can be provided with lead shielding and leaded glass for operator protection.

•	The Decomatt Pump System can be removed without draining the liquid in the sump.

•	Decomatt Systems are consructed from stainless steel to the relevant Q.A. standard.

•	The Decomatt Pump, located in the sump, allows all pressurized abrasive conduits and pumping elements to be positioned inside the process cabinet eliminating any potential for a spill or leak in the event of a system failure.

•	The lightweight process gun makes the machine much easier and less tiring for the operator.

•	Self-contained Hepa ventilation systems maintain negative pressure inside the cabinet.

•	Closed loop rinse systems can be provided which eliminates any water going to rad waste drains with the exception of periodic clean out.

TYPICAL DECONTAMINATION LEVELS ACHIEVABLE WITH THE VAPORBLAST PROCESS

BEFORE

AFTER

Component

Dose Rate 1.3

Smearable 1.2

Dose Rate 1.3

Smearable 1.2

General

Maintenance

Tools

18K dpm

fixed

approx.

None

<1K dcm /

100 cm²

None

Steel

Pipe

(painted)

<0.1mR/hr

4mR/hr

0.67K to

200K

dpm/100cm²

<0.1MR/HR

250 dpm/

100 cm²

Lead

Shielding

1mR/hr

50-100K

dpm/100cm²

<0.1mR/hr

<250dpm/

100 cm²

Rubber

Insulated

Cable

1800 dpm

fixed

None

<1K dpm/

100 cm²

None

Reactor-Head

Seal-Ring

Plate

1mR/hr

gamma

65mRad/hr/beta

20K dpm/

100 cm²

<0.1mR/hr

<250 dpm/

100 cm²

Template for

Steam-Generator

Nozzle Dam

10mR/hr

gamma

145mRad/hr beta

1mR/hr

86mRad/

hr beta

1mR/hr

5.1K dpm/

100 cm²

Decomatt is the Registered Trade Name of Vapormatt for their Nuclear Decontamination Process

Vapormatt Ltd reserves the right to change without notice any of the specifications included on this web site. The content is for illustration only and does not constitute an offer for sale, it should be noted that machines illustrated may include optional items not included in the basic specification.