---
kind: "section"
citation: "10 C.F.R. § 34.21"
title: "10"
number: "34.21"
heading: "Limits on external radiation levels from storage containers and source changers."
url: "https://uscodex.org/cfr/10/34.21"
---

# §34.21. Limits on external radiation levels from storage containers and source changers.


The maximum exposure rate limits for storage containers and source changers are 2 millisieverts (200 millirem) per hour at any exterior surface, and 0.1 millisieverts (10 millirem) per hour at 1 meter from any exterior surface with the sealed source in the shielded position.


## Notes

### Authority

Authority: Atomic Energy Act of 1954, secs. 81, 161, 181, 182, 183, 223, 234, 274 (42 U.S.C. 2111, 2201, 2231, 2232, 2233, 2273, 2282, 2021); Energy Reorganization Act of 1974, secs. 201, 206 (42 U.S.C. 5841, 5846); 44 U.S.C. 3504 note.

### Source

Source: 62 FR 28963, May 28, 1997, unless otherwise noted.