10 CFR § 835.401 - General requirements.

---
identifier: "/us/cfr/t10/s835.401"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 835.401 - General requirements."
title_number: 10
title_name: "Energy"
section_number: "835.401"
section_name: "General requirements."
chapter_name: "DEPARTMENT OF ENERGY"
part_number: "835"
part_name: "OCCUPATIONAL RADIATION PROTECTION"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 2201, 7191; 50 U.S.C. 2410."
regulatory_source: "58 FR 65485, Dec. 14, 1993, unless otherwise noted."
cfr_part: "835"
---


# 835.401 General requirements.

(a) Monitoring of individuals and areas shall be performed to:

(1) Demonstrate compliance with the regulations in this part;

(2) Document radiological conditions;

(3) Detect changes in radiological conditions;

(4) Detect the gradual buildup of radioactive material;

(5) Verify the effectiveness of engineered and administrative controls in containing radioactive material and reducing radiation exposure; and

(6) Identify and control potential sources of individual exposure to radiation and/or radioactive material.

(b) Instruments and equipment used for monitoring shall be:

(1) Periodically maintained and calibrated on an established frequency;

(2) Appropriate for the type(s), levels, and energies of the radiation(s) encountered;

(3) Appropriate for existing environmental conditions; and

(4) Routinely tested for operability.

[58 FR 65485, Dec. 14, 1993, as amended at 63 FR 59682, Nov. 4, 1998; 72 FR 31926, June 8, 2007]