---
kind: "section"
citation: "10 C.F.R. § 35.2433"
title: "10"
number: "35.2433"
heading: "Records of decay of strontium-90 sources for ophthalmic treatments."
url: "https://uscodex.org/cfr/10/35.2433"
---

# §35.2433. Records of decay of strontium-90 sources for ophthalmic treatments.

- (a) A licensee shall maintain a record of the activity of a strontium-90 source required by [§ 35.433](/cfr/10/35.433.md) for the life of the source.
- (b) The record must include—
  - (1) The date and initial activity of the source as determined under [§ 35.432](/cfr/10/35.432.md); and
  - (2) For each decay calculation, the date and the source activity as determined under [§ 35.433](/cfr/10/35.433.md).

## 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: 67 FR 20370, Apr. 24, 2002, unless otherwise noted.