---
kind: "section"
citation: "10 C.F.R. § 835.203"
title: "10"
number: "835.203"
heading: "Combining internal and external equivalent doses."
url: "https://uscodex.org/cfr/10/835.203"
---

# §835.203. Combining internal and external equivalent doses.

- (a) The total effective dose during a year shall be determined by summing the effective dose from external exposures and the committed effective dose from intakes during the year.
- (b) Determinations of the effective dose shall be made using the radiation and tissue weighting factor values provided in [§ 835.2](/cfr/10/835.2.md).

## Notes

### Amendments

[72 FR 31926, June 8, 2007]

### Authority

Authority: 42 U.S.C. 2201, 7191; 50 U.S.C. 2410.

### Source

Source: 58 FR 65485, Dec. 14, 1993, unless otherwise noted.

### Amendments

[72 FR 31926, June 8, 2007]