Connecticut Yankee: Haddam Neck Plant
Connecticut Yankee Haddam Neck Plant
August 2001
SRA's teaming partner, Millennium Services Inc., was contracted by Connecticut Yankee to provide consulting and radiological survey support in support of the Partial Site Release of approximately 30 acres of the site. The project includes two phases as outlined below.
In the first phase, the Millennium Services / SRA team performed a review of the Historical Site Assessment and radiological characterization data that existed for each of the areas. A determination was then made for what additional data would be required to demonstrate “indistinguishable from background� levels, i.e. additional survey requirements. Following this determination, the team developed, and assisted in the presentation of, the Partial Site Release Survey Plan to the Nuclear Regulatory Commission. In addition, our team wrote all of the supporting survey procedures, protocols and technical basis documents for the survey.
The second phase of the project is performance of the surveys and implementation of the Partial Site Release Survey Plan. The Surface Contamination Monitor / Survey Information Management System SCM/SIMS system developed by SRA will be used to survey paved areas and building surfaces.
February 2000 - March 2000
SRA's teaming partner, Millennium Services, Inc., was contracted by Bechtel Power Corporation, the Decommissioning Operations Contractor, to perform "free release" surveys of several structures at the Connecticut Yankee Haddam Neck Plant in support of decommissioning activities. Background radiation levels resulting from the storage of four steam generators and the pressurizer several hundred feet from the structures precluded the surveys from being performed using conventional survey techniques. Through the use of the SRA's Surface Contamination Monitor / Survey Information Management System (SCM/SIMS), the team was able to monitor building surfaces and demonstrate compliance with the free release requirements of "no-detectable" radioactivity and a system sensitivity of less than 5000 dpm/100 cm2 (Beta emitting nuclides). The large number of measurements (400 per square meter) and statistical evaluations, including cumulative frequency distribution assessments, allowed the SCM/SIMS to achieve the required survey sensitivity. Completion of the surveys resulted in the demolition of the facilities far in advance of the projected schedule using conventional survey methods.
