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Both the FRD and ORNL determined that the only way to obtain conclusive results and to accurately analyze the fire performance of the ventilation system, fire protection system, prefilters/HEPA filter array, FRP VOG duct, etc. was to design and conduct a full scale fire test series. In order to design and construct a representative test article, we had to gain an accurate and detailed understanding of the actual facility layout, fire protection systems, facility operating procedures, and ventilation system and operation. FRD personnel toured Bldg. 7920 to obtain first hand insight into its configuration and operational parameters. " However, since most of the significant areas were inaccessible, we spent a significant amount of time studying photos, building plans, facility SAR, and talking to knowledgeable ,, people. Through numerous phone calls and facsimile transmissions to ORNL and Lockwood Greene, we were able to complete these tasks and began developing a detailed test design. The majority of our questions were answered and information provided by personnel from Lockwood Greene. Although general information was available from other sources, detail and historic questions were answered by Lockwood Greene. In fact, Lockwood Greene provided a great deal of help in developing the prel!minary fire test matrix included as Table 4. BUILDING 7920 FACILITY DESCRIPTION As it turned out, NJ Alvares in his report [1] provided a good general facility description summary. It is, therefore, presented below: Facility Specifications "Figure N-1 is a plan view of the transuranium processing plant showing both office and operator's areas, and an isometric drawing of a typical cell in the operations area of the building. The shielded cell bank contains nine 7 ft. wide hot cells each with a 7 ft. long cubicle area, separated from each other by 2.0 ft. minimum thick concrete walls. Seven cells contain a tank pit area (9 x 22 ft. high). An inter-cell conveyor housing and the cellventilation exhaust duct run through the cubicle pits the full length of the cell bank. • "In the first seven cells air enters the south wall of the tank pit through a duct (10 in. diameter), the centerline of which is 21 ft. above the floor. The air exits the north wall of , the tank pit to the cubicle pit through a slot (2 x 4 ft.) ten feet above the cell floor and is drawn into a cell ventilation duct (20 x 40 in.) through an opening (17.5 in. diameter) located 8.5 ft. above the cell floor. "In the last two cells air enters the cubicle pit through a similar duct only 2' above the pit floor and exits to a cell ventilation duct. A waste-tank pit behind the last two cells and below the first-floor level is connected to each of the last two cubicle pits through a 2 ft 5

A fire hardened wooden cabinet was developed for the storage of flammable liquids for LLNL Bldg. 151 nuclear chemistry laboratories. The new cabinet requirements were to fit into existing cabinet spaces, match existing cabinets in appearance, and meet the National Fire Protection Association Flammable and Combustible Liquids Code. A standard test apparatus was developed to produce the required fire exposure necessary to evaluate existing cabinets and new designs. The final design was a cabinet insert that could be prefabricated and installed into the appropriate storage area of the existing cabinets. Project DescriptionThe primary objective of this project was to develop a method of fire hardening existing wooden laboratory cabinets in Building 151 so that they would comply with the requirements _i_f NFPA 30 for flammable liquid storage. The chemistry labs generally contain 2 to 25 liters of flammable liquids stored in plastic bottles (0.5 to 4 liters) and in metal cans (1 gallon). Most of these liquids had previously been stored in cabinet spaces beneath built in wooden work benches. Because the quantities of flammable liquids sometimes exceed those for daily use, the excess must be stored h_cabinets that meet the requirements of National Fire Protection Agency (NFPA) Flammable and Combustible Liquids Code (NFPA 30) [1].Qualifying cabinets must withstand a 10 minute fire exposure using the standard time-temperature curve as prescribed in ASTM E-152-8 la [2] without exceeding an internal air temperature of 163°C (325°F).A typical solution to this requirement has been to install certified, metal flammable liquid cabinets.However, this tactic may not always be practical, may not be esthetically pleasing, and maybe costly. The existing wooden cabinets are built-in units. They are integral with the counter tops and include typical analytical lab fixtures. Furthermore, independent testing by others has shown that a number of certified metal cabinet brands do not provide the protection intended by the NFPA standard. Therefore, this project was initiated to develop fire hardened wood cabinets, preserve the chemistry laboratory benches outward appearance and comply with the NFPA code.