---
kind: "section"
citation: "10 C.F.R. § 835.501"
title: "10"
number: "835.501"
heading: "Radiological areas."
url: "https://uscodex.org/cfr/10/835.501"
---

# §835.501. Radiological areas.

- (a) Personnel entry control shall be maintained for each radiological area.
- (b) The degree of control shall be commensurate with existing and potential radiological hazards within the area.
- (c) One or more of the following methods shall be used to ensure control:
  - (1) Signs and barricades;
  - (2) Control devices on entrances;
  - (3) Conspicuous visual and/or audible alarms;
  - (4) Locked entrance ways; or
  - (5) **Administrative controls.**
- (d) Written authorizations shall be required to control entry into and perform work within radiological areas. These authorizations shall specify radiation protection measures commensurate with the existing and potential hazards.
- (e) No control(s) shall be installed at any radiological area exit that would prevent rapid evacuation of personnel under emergency conditions.

## Notes

### Amendments

[58 FR 65485, Dec. 14, 1993, as amended at 63 FR 59684, Nov. 4, 1998]

### 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

[58 FR 65485, Dec. 14, 1993, as amended at 63 FR 59684, Nov. 4, 1998]