NIST CENTER FOR NEUTRON RESEARCH (61):  Operates the neutron beam split-core reactor (NBSR) reliably, safely, and in a cost-effective manner; develops and operates a National User Facility providing unique cold and thermal neutron-based measurement capabilities to U.S. researchers from industry, university, and government; conducts programs in materials research and other disciplines using neutron methods; develops and maintains state-of-the-art instrumentation to ensure the best utilization of the NBSR and its experimental facilities at NIST and national resources; and through cooperative arrangements, collaborates with and provides facilities, coordination, guidance, and technical services for all NIST, other government agencies, universities, and industrial programs utilizing the NIST reactor for materials research, nondestructive evaluation, neutron imaging, chemical analysis, neutron standards, dosimetry, and radiation metrology.

--REACTOR OPERATIONS AND ENGINEERING GROUP (610.01):  Responsible for the safe, efficient operation of the NIST Research Reactor; is responsible, through innovative fuel cycle management, continual upgrade and maintenance of the physical plant, staff training, and attention to engineered safety systems, for the operation of the 20 MW reactor with the highest possible availability, while protecting the public safety; and is responsible for ensuring the broadest possible use of the irradiation and other reactor facilities in service to U.S. industries, universities, and other government agencies, and for providing technical and engineering support to users and experimenters.

--NEUTRON-CONDENSED MATTER SCIENCE GROUP (610.02):  Responsible for providing the U.S. research community with a national center for neutron research, for maintaining state-of-the-art neutron scattering facilities at the NIST Research Reactor, and for the conduct of cutting edge research in condensed matter physics, chemistry, and materials science using neutron scattering techniques; and provides, through continual instrument and method development, unique capabilities and collaborative opportunities to U.S. industries, universities, and government agencies for the investigation of the advanced materials that are at the heart of the national effort to improve competitiveness.

--RESEARCH FACILITY OPERATIONS GROUP (610.03):  Operates the neutron research facilities at the NBSR as a National User Facility for U.S. researchers from industry, university, and government; maintains all necessary support for users at the facility, including sample environmental equipment, cryogenic fluids, etc.; operates and maintains the cold neutron guide network and cold source; provides technical assistance to staff and users; and develops and maintains cold neutron instrumentation.