NSSI has collected, compacted, treated, and shipped radioactive waste to offsite facilities for disposal since 1971 and is permitted for a full spectrum of radionuclide including special nuclear material (SNM). For sealed radioactive sources, NSSI can provide the design and fabrication of specialized containers for land disposal and accepts sealed sources for consolidation and packaging for land disposal. As needed, NSSI provides personnel and equipment to aid in the packaging and transport of radioactive waste materials at customer sites.
NSSI accepts a full spectrum of hazardous and radioactive waste materials for on-site treatment and off-site final disposal. NSSI treats solids, liquids, and gases bearing EPA hazardous waste codes as well as non-hazardous and accepts many specialized chemical wastes such as Mercury and Freon for recycling and reuse. NSSI can provide full hazardous waste services including on-site lab packing and labeling, transport, treatment, and final disposal.
NSSI provides for the treatment and disposal of organic and aqueous chemical waste materials at competitive pricing. While fuel blenders are limited in their selection of wastes for "fuel" blending to a minimum of 5,000 BTU per pound so that, when blended for burning as "fuel", the final waste will provide not less than 8,000 BTU per pound. All NSSI blended wastes are sent to commercial facilities permitted for "incineration" rather than for burning as "fuel". As a result, the "fuel" BTU restriction does not limit the types of solvent and water wastes NSSI accepts for waste blending. NSSI can therefore provide for the blending and incineration of liquid organic solvents and aqueous streams at very competitive pricing.
NSSI allows up to 50% water by weight and does not require that received waste streams meet any minimum BTU content. Aqueous wastes exceeding 50% water content by weight are acceptable with excess water surcharges. Halogen content is not a cost factor below 5% halogen (non-fluorinated) and halogen wastes, including fluorinated wastes, are accepted up to 100% with appropriate surcharges. The solids content of liquid waste is also factors into pricing. With the solids content measured as suspended solids and settled solids. Settled solids are determined by measuring the depth of the solids. Suspended solids are measured by centrifuging a representative sample of the liquid layer. The metals content of liquid waste streams is very important as any metals contained may become an ingredient of the incineration facility's solid, liquid, or gaseous effluent and significantly impact costs and/or eligibility.
To assure that wastes received are in fact the wastes quoted, NSSI requires that a generator complete a waste profile defining all of the parameters of their waste and to support the profile with analytical results or knowledge of the process generating the waste. NSSI compares the received waste to the generator prepared profile.
NSSI has long specialized in the treatment of hazardous compressed gases. NSSI uses a variety of chemical processes to react the gases to form non-hazardous treatment residues. NSSI accepts a full spectrum of compressed gases including those with radioactive constituents.
NSSI provides Tritium recovery services in excess of 99% of the contained Tritium for reuse and resale as an alternative to the land disposal of high Tritium content materials at its hazardous, mixed and radioactive waste processing center. NSSI is currently accepting electron capture detectors, static devices, sealed neutron generator tubes and target assemblies with activities ranging from milliCuries to multiple Curies.
Tritium is a major problem from a land disposal standpoint as Tritium exchanges readily with ground water and tends to move easily through geologic structures. Land disposal sites limit the Tritium activity of incoming wastes to 1 micro Curie per cubic centimeter unless expensive over pack containers are utilized. As a result, Tritium generators are searching for alternatives to land disposal in order to protect the environment, limit operational expenses, and avoid future liabilities associated with the remediation of sites which have Tritium mobility problems. Waste streams treatable by the Thermal Desorption System include targets from neutron generator devices, foils from electron capture detectors, static eliminators, static measurement devices, ion getter pumps, and metal components of Tritium handling systems and Tritium gas storage devices.
A second generation 3" oxidizer is in operation at NSSI's Houston facility which provides oxidation services for high Tritium content organics. The technology for the oxidation of high Tritium organics was developed by various governmental laboratories and pharmaceutical research facilities to convert the residues from multiple Curie Tritium labeling activities to water and carbon dioxide. The existing system is capable of oxidizing 40 liters per day for most organics and of unattended operation. The oxidizer currently in operation has demonstrated oxidation of alcohols containing halogens with a conversion efficiency of 99.99% and quantitative recovery of the Tritium content. The system is useable for all types of liquid organics or organics suspended in liquids including halogenated organics. Water with trace organics can be processed if mixed with other organics to support the oxidation. At present this technology is limited to economic concerns as the oxidation process yields a volume of tritiated water equivalent to the volume of the oxidized organic. As a result, NSSI is restricting use of the system to organic waste streams containing greater than 1 Curie per liter.
Tritium disposal is a major problem for high activity Tritium users as Tritium exchanges readily with ground water and moves easily through geologic structures. Tritium releases from incinerators, fuel blenders and other thermal treatment facilities add to this ground water contamination as the Tritium exchanges with environmental moisture and returns to the earth as precipitation. Subsurface Tritium has received significant news media attention in recent years and has sensitized governmental and commercial Tritium users to disposal methods which result in releases into the environment. NSSI's TOX oxidation process provides an alternative to environmental releases by recovering the Tritium content of waste streams for reuse or for storage for decay.