NIST Center for Neutron Research Cooling Tower Maintenance and Repair Services   2

Amendment 2

The purpose of this amendment is to extend the due date for quotations from 10 September by 3:00 PM EDT to 15 September at 3:00 PM EDT.

Amendment 1

The purpose of this amendment is to provide responses to Request for Information (RFI) questions and include attachments as a result of the responses to the RFI.

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-D rr. 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).

The overall condition of the cooling towers is good. The cooling towers are in need of routine maintenance, repairs, and cleaning. In addition, the right-angle gear drives made by Amarillo in tower cells 1-4 are aged and in need of special attention. The right-angle gear drive for cell #5 was replaced in December 2019. This is to include maintenance, cleaning and repairs.

The objective of this requirement is to inspect, clean, perform routine maintenance, and complete required repairs on both sets of cooling towers. This contract 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.