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The NIST Center for Neutron Research (NCNR) owns and operates a heavy water-moderated nuclear test reactor and associated neutron beam research facility. The NCNR’s reactor is licensed with the Nuclea... The NIST Center for Neutron Research (NCNR) owns and operates a heavy water-moderated nuclear test reactor and associated neutron beam research facility. The NCNR’s reactor is licensed with the Nuclear Regulatory Commission (NRC) under the name National Bureau of Standards Reactor (NBSR). The Reactor's secondary cooling water is cooled by a set of cooling towers. The cooling towers are located behind the NCNR (Building 235). The main cooling tower was built in 2002 by Balcke-Dürr. It's constructed on a concrete basin with pressure treated wood and fiberglass siding. Exterior wood surfaces consist of a stairway, railings and plywood decking. It has 3 cooling cells (#1, #2 and #3). The secondary cooling tower is a modular design. It was erected in 2011, is supported on steel pilons and is made of stainless steel. It is a BAC model 3781C tower. It has 2 cooling cells (#4 and #5). NIST is seeking responses from all responsible sources, including large, foreign, and small businesses. Small businesses are defined under the associated NAICS code for this effort, 811310, as those domestic sources having $8.0M or less in annual receipts. Please include your company’s size classification and socio-economic status in any response to this notice. If at least two qualified small businesses are identified during this market research stage, then any competitive procurement that resulted would be conducted as a small business set-aside. The Objectives of this requirement is to inspect, clean, perform routine maintenance, and complete required repairs on both sets of cooling towers for a period of one year with four one-year options. This requirement also includes several subsystems that work in tandem with the main cooling tower structures. These systems include a deicing system, a fire protection system and a plume abatement system. In addition, cooling tower cell #4 right angle gear drive must be replaced in the first year with one of the remaining three right-angle gear drives replaced in the following years of this requirement. The other right-angle gear drives will be sent out by the contractor to be refurbished at the manufacturer. The contractor must procure a new right-angle gear drive for replacement of the right-angle gear drive in the worst condition in the cooling tower cells 1-3 in option year one. The contractor will then arrange for its transport of the right-angle gear drive removed to the manufacturer, refurbishment at the manufacturer and return to the NCNR. This refurbished right-angle gear drive will then be installed in the next worse off cooling tower cell in the next option year. The removed right-angle gear drive will then be sent off for refurbishment under the direction of the contractor as outlined above and installed into the third and final cell. The last right-angle gear drive removed will be sent off for refurbishment as outlined above and returned to the NCNR to act as a spare. Instructions to Responders: Interested parties that are capable of performing these tasks are requested to email a detailed capabilities statement, including past experience, describing their abilities to donald.collie@nist.gov and patrick.staines@nist.gov no later than the response date for this sources sought notice.