| Table I.10, Combination Measurement-Calculational Method | ||
| Step No. | Description | Input Data and Results |
|---|---|---|
| PART 1 | ||
| 1 | Dose received by TLD, in mrem | 100 |
| 2 | Total hours TLD exposed | 24 hr/d x 30 d/mo = 720 |
| 3 | Divide the results of Step 1 by the results of Step 2 to determine HOURLY DOSE RECEIVED, in mrem in an hour | 0.14 |
| 4 | Multiply the results of Step 3 by 365 d/yr x 24 hr/d = 8760 hours in one year = MAXIMUM ANNUAL DOSE RECEIVED FROM GAUGES, in mrem in a year | 365 x 24 x 0.14 = 8760 x 0.14 = 1226 |
| NOTE: For the conditions described above, Step 3 indicates that the dose received in any one hour is less than the 2 mrem in any one hour limit. However, if there are any changes, then the licensee would need to reevaluate the potential doses which could be received in any one hour. Step 4 indicates that the annual dose received would be much greater than the 100 mrem in a year allowed by the regulations. | ||
| PART 2 | ||
| At this point Joe can adjust for a realistic estimate of the time the secretary spends in the area as he did in Part 2 of Example 1. | ||
| PART 3 | ||
| If the results of Joe's evaluation in Part 2 show that the annual dose received in a year exceeds 100 mrem, then he can make adjustments for realistic estimates of the time spent in the area of concern while the gauges are actually in storage as in Part 3 of Example 1. (Recall that the TLD measurement was made while all the gauges were in storage--i.e., 24 hr/d for the 30 days that the TLD was in place.) | ||