Detector Characterizations
Developed models (using the ISOSHLD and QAD codes) to predict the response of the Eberline SA-14 and SA-15 post-accident noble gas monitors in use at the Illinois Power Company Clinton Power Station to determine if these systems met the requirements of NUREG 0737 for all times post accident. This effort included characterization of the noble gas source term as a function of time post accident in addition to development of the detector models.
Developed detector response functions for the soil assay systems in use at Johnston Atoll.
Performed computer modeling and physical measurements to develop correction factors for the response of the main steam line monitors in use at the James A. FitzPatrick plant to account for the fact that the monitors were not being calibrated in a free-air geometry.
Developed detector response functions for the New York Power Authority for the assay of storm drain sediments using a portable gamma spectrometer.
Assessed the response of the post-accident containment monitor for the Hope Creek plant for various levels of core damage.
Developed a methodology for establishing acceptance criteria for radiation monitor calibration parameters for the New York Power Authority based on the historical performance of the monitors. This approach may be applied to any calibration parameter, and is not limited to just radiation monitors.
Performed assessments of the radiation monitoring systems (RMS) installed at several power plants with respect to calibration procedures and practices and system availability. Assisted with the development of long term action plans at these sites to implement improvements to RMS practices, and provided many engineering calculations in response to action plan items. Also implemented large-scale improvements to the associated operating procedures, and developed information manuals for RMS systems at different sites to be used as references by plant staff. These efforts have been commended by the NRC inspectors responsible for oversight of these utilities.
Performed assessments of the personnel contamination monitors in use at the Indian Point Unit 3 plant to establish their sensitivity to internal contaminations. This effort included establishing the assessment methodology in addition to detailed analysis of the data collected.
