Department of Energy, Rocky Flats Environmental Technology Site, P.O. Box 928, Golden, CO 80402-0928

44 -- STATIONARY PYROCHEMICAL FURNACES SOL KH 603396CB POC Contact Point, L.K. Brown, Kaiser-Hill Company, L.L.C., Fax 303/966-8335, P.O. Box 464, Bldg. 850, Golden, CO 80402-0464 Kaiser-Hill Company, L.L.C., (Contractor), is the Integrating Management Contractor at DOE's Rocky Flats Environmental Technology Site (RFETS) near Denver, Colorado. Contractor contemplates a fixed-price subcontract award for the engineering, design, construction, assembly, testing, and performance of 10 each Stationary Pyrochemical Furnaces. Estimated subcontract value 1M-2M. Interested bidders shall fax a notice of interest to the Buyer at fax number 303/966-8335 by July 1, 1996. The notice shall include company name, company address, attention to person, and business size. The specification covers the design, performance, testing and acceptance requirements. The furnaces will be used to stabilize waste salts by fully oxidizing the material. The salt residue and an oxidant will be placed in a crucible. The crucible will then be placed into the furnace inside a tantalum and a stainless steel backup crucible and heated until the contents are molten. This temperature will be maintained for the duration of the oxidation period. An internal stirring mechanism will be run continuously while the salt is in a molten state. A thermowell mounted thermocouple will be lowered into the molten salt to monitor the salt temperature. During the oxidation period, the head space above the material will be purged with 100 percent argon except for the last 15 minutes. During the last 15 minutes of the oxidation period, the purge will be changed to a mixture of 18 percent air and 82 percent argon to assure that any volatile reactive species are also oxidized. After the oxidation is complete, the stirring mechanism and the thermowell will be raised and the mixture will be allowed to cool. Cooling tower water will be used to cool the outer jacket of the heating element assembly and the outside of the furnace base assembly. The furnaces shall consist of an inconel inner shell; a heating element assembly containing the heating element, outer can, thermocouples, power supply connector, and cooling coils; a base assembly with cooling coils; a cover assembly with thermocouple mount and stirrer mount, and stirrer assembly. The furnaces will be mounted on the bottom of a glovebox and the glovebox contamination boundary will extend to the base/inner shell assembly. Gaskets shall be provided to seal the connections between the base assembly and the bottom of the glovebox and between the base assembly and the inner shell. The connection between the base assembly and the heating element outer can assembly shall also be sealed with a gasket. The outer can assembly will be vented to the glovebox through external piping with a filter to prevent contamination of the room air if the inner shell or the gasket develops a leak. Vent piping and filter will be furnished and installed by others. The furnace cover assembly will be inside the glovebox. Furnaces shall be capable of developing and maintaining a temperature of 950 degrees C in a furnace charge consisting of 2 KG of calcium chloride within a melting crucible with the design cover gas flow rate of 1.1 liter/min and the design cooling water flow as determined by the subcontractor. The cooling water flow will be maintained constant during all modes of furnace operation. The cooling water temperature will vary between 50 degrees F in the winter to 75 degrees F in the summer. The design nitrogen temperature inside the glovebox is 65 degrees F to 100 degress F and the design air temperature outside the glovebox is 75 degress F. Insulation and/or cooling coils shall be designed to maintain exposed metal surfaces outside of the glovebox below a maximum temperature of 140 degress F with a design cooling water temperature of 75 degrees F. Material requirements - base assembly and cover assembly shall be fabricated from Type 304 or 304L stainless steel with copper cooling coil tubing. The stirrer shaft shall be fabricated from Type 416 stainless steel bar, ASTM A582. The stirrer shall be fabricated from tantalum, ASTM B365 and ASTM B708. The use of asbestos is prohibited. (0164)

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