Calculated dose equivalent
rates and the assessed thermoluminescent detectors (TLD) exposure time in the paraffin block containing a [sup.239]Pu-Be source Dose equivalent
rate Detectors [Sv/h] exposure time [h] 0.044 [+ or -] 0.001 72 0.087 [+ or -] 0.002 144 0.146 [+ or -] 0.004 240 0.293 [+ or -] 0.007 480 [sup.239]Pu-Be--plutonium and beryllium.
Table 4 indicates the calculated values of absorbed dose rate, radium equivalent activity, the external hazard index and annual effective dose equivalent
were found to be approximately same for all the investigated surface and sub surface samples.
It is our recommendation that the ANSI/IEEE as well as the IEC standards define the test conditions using source activity or gamma-ray emission rate (for specific gamma-ray lines) instead of exposure rate or ambient dose equivalent
In order to measure the annual effective dose equivalent
, conversion coefficients associated with the absorbed dose coefficients in the air are used, the amount of 0.7 Gy / Sv to convert modified coefficients of absorbed dose in air changed to effective dose received annually by adults and 0.2 is used as external occupation factor.
The count rate (R.), deviations from mean count rate ([DELTA]R), dose equivalent
(D;), deviations from mean dose equivalent
([DELTA]D) and percentage deviations from mean (%[DELTA]) for the 10 locations of the college campus environment are displayed in Table 1.
Effective dose, sometimes referred to as effective dose equivalent
, takes into account which tissues and organs have absorbed the radiation dose.
The analysis provided a value for deep dose equivalent
The amount of exposure, the dose, and the dose equivalent
are used to indicate how much damage may occur to an individual exposed to radiation.
A gradual decrease in dose and/or dosing interval of dexaxamethasone every 3-7 days, in an attempt to reach a physiologic dose equivalent
to 20 mg of cortisol per day (i.e., approximately 0.75 mg of dexamethasone per day), should be attempted (Szabo & Winkler, 1995).
In contrast, the Perchlorate Study Group, an industry consortium that has worked with the EPA and the DOD, proposed a much looser reference dose equivalent
to 200 ppb.
According to Commission information, the effective population dose equivalent
resulting from liquid and gaseous radioactive waste should not exceed 100 microSieverts.