U.S. Nuclear Regulatory Commission
Question 44: During 1993, the licensee performed a
prospective dose evaluation, and decided not to measure
internal dose. In 1994, the licensee again evaluates the
internal dose and finds that the threshold for monitoring
is exceeded and begins monitoring. Nothing in the facility
(engineering controls or productivity levels) has changed.
The licensee accounts for the internal dose contribution
when calculating TEDE for 1994. Must the licensee go back
and adjust TEDE for 1993?
Answer: Yes, the licensee must go back and adjust the
TEDE for 1993, based on the best available data. The
information included in the question indicates that the
1993 prospective evaluation was in error and that internal
dose should have been measured; therefore, this error needs
to be corrected. (Reference: 10 CFR 20.1502)