Final Status MARSSIM Survey of the LSU Radioisotope Laboratory Building and the LSU Nuclear Science Building

Client: 1st Performance: Envirotest, Inc. (subcontracted by Louisiana State University); 2nd Performance: Louisiana State University

Location of Projects: Baton Rouge, LA

Description of Work

ARS International, Inc. (ARS) performed MARSISIM based Final Status Surveys of the LSU Radioisotope Laboratory Building (1st Performance) between January and February 2009 and of the LSU Nuclear Science Center (2nd Performance) between November 2011 and March 2012. The surveys were conducted in accordance with the protocol set forth the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), NUREG-1575. The survey was conducted between January 26, 2009 and February 27, 2009.

The LSU Radioisotope Laboratory building was a single story structure with a foot print of approximately 3,850 square feet. The building was constructed in the mid 1930’s for husbandry instruction and research. Iodine-125, C-14, H-3 and other radioactive materials were used within the building as part of the husbandry research.

The LSU Nuclear Science Center building is a multi-story structure with approximately 14,000 square feet of floor space. The building was constructed in 1925 as a part of the Agricultural Experiment Station. The building contains a subcritical reactor assembly, numerous calibration standards, a (PuBe) neutron source, and several radiological count rooms, numerous radiological laboratory spaces, classrooms and offices.

The building surveys involved a direct scan survey of 100% of all accessible interior building surfaces for alpha, beta, and gamma contamination. The direct scans also included surveys for low energy beta and gamma radiation associated with C-14 and H-3. Exterior roof direct scans for alpha, beta, and gamma radiation were also performed on both buildings.

Static counts and removable contamination surveys on interior and exterior surfaces were performed for gamma, bet and alpha radiations. Over 10,000 smears and 10,000 static count locations were measured in each of the two buildings.

Smears for tritium and carbon-14 were taken and analyzed from the interior surfaces of vents hoods, floor drain openings, sink drains, and commodes in both buildings.

A hole was cut in HVAC and vent hood ducting to allow for inner ducting surveys in both buildings. Direct alpha/beta frisks, smear surveys, and static alpha, beta, and gamma exposure rate measurements were performed on inner HVAC and vent hood ducting surfaces. The land surface immediately surrounding the buildings was scanned for elevated gamma exposure rates. Soil samples were collected and analyzed for gamma emitters. A building specific Final Status Survey Report was developed and submitted to Louisiana State University.