News - Page 2 of 2 - TerraGraphics Environmental Engineering

August 2, 2017

Initial testing of a technology to eliminate chemical vapors is showing promise, destroying 95 percent of the vapors fed into the system in a recent test.

WRPS is supporting NUCON International as it develops a thermal-oxidation demonstration project based on an internal combustion engine. The unit works by pulling tank vapors into the engine’s induction system and combusts them in the engine cylinders, destroying the vapors in the process.

Proof-of-concept testing was conducted in May. The goal of the test was to determine if the NUCON unit could destroy or remove chemicals of potential concern, or COPCs, in the tank farms with 93 percent destruction efficiency. The NUCON unit performed above that threshold, destroying 95 percent of the vapors fed into the system.

Testing was performed at NUCON’s facility in Columbus, Ohio. It focused on destroying furans and hexane, formaldehyde, hydrocarbons, ammonia and mercury. Representatives from WRPS, DOE-ORP and TerraGraphics Environmental Engineering, Inc. witnessed the testing.

While it was demonstrated that the system works at a high level, it did not demonstrate the system functions adequately with the low concentrations of compounds such as furans and nitrosamines that are present in the Hanford waste tanks. Additional testing will be performed to help resolve this issue.

The NUCON units will be shipped to an off-site facility in Richland for bench-scale testing. If successful, those tests will be followed by a pilot-scale test in fiscal year 2018 and a full-scale demonstration in the years that follow.

The NUCON thermal-oxidation unit is one of a number of technologies being explored to improve worker safety. The WRPS Chief Technology Office began evaluating technologies in fiscal year 2016.

Opportunities for Employee Engagement
• The next CVST Communications Sub-Team meeting is Monday, Aug. 7, from 3 to 4 p.m. in Conference Room 110 at 2425 Stevens Center.
• The next full CVST meeting is Wednesday, Aug. 23, from 2 to 4 p.m. at 2704-HV, Room G-206.

May 9, 2016

TG’s Department of Energy (DOE) Program Division continues to experience strong growth in 2016. After starting the division with one person in October 2013, TG Pasco now has nearly 60 professional consultants supporting the environmental cleanup efforts at the Hanford site. TG Pasco’s diverse workforce includes a variety of engineers and scientists, as well as a meteorologist and two archaeologists. Although the Environmental business unit continues to be our largest group, the Operations and Work Planning business units have experienced high growth rates since their inception in late 2015. With our diverse professional staff, we are poised for continued growth and expansion of our business units this year and in the future.
TerraGraphics supports four of the five DOE prime contractors at the Hanford site on cleanup tasks that include, but aren’t limited to, treatment of radiological and chemical liquid waste, pump and treat systems, groundwater monitoring, and cleanup of vadose zone contaminated soil sites.
TG’s DOE Program is pursuing work at other sites throughout the DOE Complex, including at the Idaho National Laboratory (INL). TG looks to expand our DOE support to sites at Portsmouth, Paducah, and the Nevada Test Site outside of Las Vegas. TG is exploring opening offices at other DOE locations to locally support these efforts.
– Chris Haas, DOE Program Director