MVS® is a proprietary in-container induction process that has been developed to be a simple, low cost, and quickly deployable vitri fication option to convert radioactive wastes into glass. With the inherent flexibility and wide operating temperature range of the MVS®, a vitrification solution is provided which ensures the safest and most secure long term isotope immobilization.

MVS® is a volume reduction and stabilization process that immobilizes waste in a leach-resistant glass matrix. The resulting waste form provides the ultimate assurance of long-term environmental isolation while providing volume reduction benefits.

Our proprietary MVS® container is the heart of the system, serving as both the inductively heated melter and the disposal container for the vitrified waste. The container consists of a three-part system that collectively provides the containment for melting the waste for protecting workers and the environment:

1 The outermost cylinder is typically a stainless steel shell, as it is the most commonly accepted final disposal canister by our customers’ final disposal sites

2 Inside the shell is an insulating layer that protects the stainless steel from heat generated during the melting process

3 The inner layer is a graphite induction susceptor which is designed to be resistant to oxidation and corrosion

NUCLEAR SOLUTIONS

Modular Vitrification System (MVS®)Our MVS® is a waste stabilization process that produces a leach resistant

glass waste form thereby ensuring long-term environmental isolation.

MVS® is a proprietary in-container, hot-walled induction process

MODULAR VITRIFICATION SYSTEM®

MVS® is an innovative single-cycle, inductively heated, melt-in-the-final-container system designed to deliver cost, schedule, and safety advantages over competing vitrification technologies due to its:

� Ease of scalability � Lack of electrical coupling with the glass � Waste insensitivity � Ability to receive either dry solids or slurry feed � Absence of molten glass pouring � Viscosity independence � Wider range of process temperatures � Modular and transportable configuration

A series of inductive coils, which are independently controlled, are used to selectively heat the appropriate section of the treatment container during the treatment process. By controlling the amount of heat input, the size of the molten pool is minimized which increases the overall efficiency of the process and significantly improves the retention of potentially volatile contaminants.

The process operates by feeding solid or liquid waste streams, depending on the application, to the module fill head where it then drops into the induction zone and onto the molten glass pool. The continual feeding and conversion of waste to glass causes the pool in the canister to rise. The molten pool typically rises at a speed of a few inches per hour. Process performance data such as glass depth and container integrity is collected continuously during the process and reported back to a process control system, where it is monitored and recorded. Water vapor and other off-gasses that formed during the melting process are evacuated and treated by the off-gas sub-system. As the pool rises, product below the molten pool is allowed to gradually cool and solidify into a solid durable waste form. To ensure canister integrity is maintained during processing, an active cooling system air-cools the outer stainless steel canister.

The MVS® technology is an inherently simple, mechanically passive system that utilizes a single use treatment canister, thus eliminating most of the typical safety case concerns involving conventional melter systems.

A piece of Borosilicate Glass made using Veolia’s MVS®

Current Hot-Cell Condition

Contact us for more information:BRETT CAMPBELL, DIRECTOR

office: 509.737.1377 | stabilization@veolia.com | www.nuclearsolutions.veolia.com