Idaho National Laboratory Environmental Monitoring Plan

The Operational Dosimetry Section of the ICP contractor analyzes the environmental dosimeters. The
four chips are read separately and a mean response is determined for each set. This value is converted to
the exposure in milliroentgen based on a detailed calibration procedure. Dosimeter data are interpreted by
comparing exposures measured at the boundary locations to those at distant locations.
The ESER Program also maintains two HPIC to monitor exposure rates in “real time” at the Rexburg
and Blackfoot Community Monitoring Stations. Data collected at these locations are transmitted to the
NOAA office in Idaho Falls via a radio telemetry network. The data are displayed on NOAA’s Mesonet
web site at http://www.noaa.inel.gov/windV/windV.asp.
4.9.4 NOAA
The NOAA ARLFRD is primarily responsible for meteorological monitoring at the INL Site (see
Section 5). However, external radiation sensors have been installed at all towers in the meteorological
monitoring network; most of the sensors are for event monitoring and are described in Section 6. All
external radiation sensors used for environmental surveillance are owned and maintained by other
organizations. ARLFRD’s primary role with these sensors is to collect and archive the data. Sixteen
towers have HPIC, two owned by the ESER Program and the others owned by the State of Idaho.
Environmental Surveillance 4-42