Texas A&M Nuclear Science Center

Triga Mark I Reactor[1]
Operating InstitutionTexas A&M University
TypePool
Utilization90 MW·d/yr
Power1 MW (thermal)
Construction and Upkeep
Construction CostUS$1.5 million
Construction BeganJanuary 1, 1959
First CriticalityJanuary 1, 1962
Annual Upkeep CostUS$0.9 million
Staff20
Operators11
Technical Specifications
Max Thermal Flux2.0×1013 n/(cm²·s)
Max Fast Flux2.0×1011 n/(cm²·s)
Fuel Typeuranium zirconium hydride
Cooling100% natural convection
Neutron Moderatorlight water
zirconium hydride
Control Rods6 rods, B4C
Cladding Materialstainless steel

There are two nuclear research reactors that serve the Texas A&M University Nuclear Science Center. The older of the two is the AGN-201M model, a low-power teaching reactor. The newer reactor, the TRIGA Mark I, is focused strongly towards research.

AGN-201M

This was the first reactor of the Nuclear Engineering program at Texas A&M, built in the 1950s and licensed on August 26, 1957.[2] It is going through system upgrades and is not operational for 2017. The reactor is of a negligible thermal power of 5 watts but achieves criticality, making it a critical assembly.

The AGN-201M type reactor is also employed at University of New Mexico and another AGN-201 type is used at Idaho State University.

TRIGA Mark I

This is the main reactor of the NSC, operation began in 1961. Tours are available to the public and it is reported that around 2,000 students participate in a tour each year. In 1999 there were 2,982 visitors.

The reactor is located in a stand-alone facility two and a half miles (4.0 km) away from the Texas A&M campus and close to an airfield.

Technical specifications

This reactor was part of the first line of TRIGA reactors but has a number of features that distinguishes it from the other dozens of TRIGA reactors in use today. It is a 1 megawatt pool-type reactor. It is designed for optimal irradiation of samples and is used to produce a number of radioisotopes for medical and industry applications.[3]

The reactor ran on 70% highly enriched uranium (HEU) until early 2006 when the core was refueled with low enriched uranium as a part of the National Nuclear Security Administration's (NNSA) Global Threat Reduction Initiative. This was a part of the Bush administration's efforts to minimize the terrorist threat posed by nuclear fuel in civilian applications around the world and constituted the first and only refueling of the reactor ever. In the decades that it had been in operation, the fuel had depleted its U-235 content from 70% to around 60%. The new fuel is somewhere under 20% enriched since it is classified as LEU.

References

  1. ^ IAEA Database of Reactors "Nuclear Research Reactors in the World". Archived from the original on 2008-05-16. Retrieved 2008-05-16., data from 2001-02-15
  2. ^ "Information Digest, 2016–2017 (NUREG-1350, Volume 28), APPENDIX I: Operating Nuclear Research and Test Reactors Regulated by the NRC". U.S. Nuclear Regulatory Commission. September 2016. Retrieved 2016-11-10.
  3. ^ Binney, S.E.; S.R. Reese; D.S. Pratt (February 22, 2000). "University Research Reactors: Contributing to the National Scientific and Engineering Infrastructure from 1953 to 2000 and Beyond". National Organization of Test, Research and Training Reactors. Archived from the original on July 1, 2007. Retrieved 2007-04-07.

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