---
kind: "section"
citation: "10 C.F.R. § 53.460"
title: "10"
number: "53.460"
heading: "Safety categorization and special treatments."
url: "https://uscodex.org/cfr/10/53.460"
---

# §53.460. Safety categorization and special treatments.

- (a) Structures, systems, and components must be classified according to their safety significance. The SSC categories must include “Safety-Related,” “Non-Safety-Related but Safety-Significant,” and “Non-Safety-Significant,” as defined in subpart A of this part.
- (b) For SR and NSRSS SSCs, the conditions under which they must perform their safety function in [§ 53.230](/cfr/10/53.230.md) must be identified. Special treatments must be established in accordance with this and other subparts to provide confidence that the SSCs will perform under the service conditions and with reliability consistent with the analysis performed under [§ 53.450](/cfr/10/53.450.md) to demonstrate meeting the safety criteria in §§ [53.210](/cfr/10/53.210.md) and [53.220](/cfr/10/53.220.md).
  - (1) The special treatments for SR SSCs must include meeting the applicable quality assurance requirements from appendix B of [part 50](/cfr/10/part50.md) of this chapter.
  - (2) The special treatments for NSRSS SSCs and special treatments for SR SSCs beyond those required under [paragraph (b)(1)](#b-1) of this section may include meeting selected quality assurance requirements from appendix B of [part 50](/cfr/10/part50.md) of this chapter when such treatment is needed to address performance requirements, equipment reliability, or uncertainties.
- (c) The identification of special treatments for SR and NSRSS SSCs must account for human actions needed to prevent or mitigate LBEs, the need to perform such actions reliably under the postulated environmental conditions, and the role of programs established in accordance with [subpart F](/cfr/10/subpartF.md) of this part to provide confidence that those actions will be performed as assumed in the analysis performed in accordance with [§ 53.450](/cfr/10/53.450.md) to demonstrate meeting the applicable criteria in §§ [53.210](/cfr/10/53.210.md), [53.220](/cfr/10/53.220.md), and [53.450(e)](/cfr/10/53.450.md?p=e).

## Notes

### Authority

Authority: Atomic Energy Act of 1954, secs. 11, 101, 103, 108, 122, 147, 161, 181, 182, 183, 184, 185, 186, 187, 189, 223, 234 (42 U.S.C. 2014, 2131, 2132, 2133, 2134, 2135, 2138, 2152, 2167, 2169, 2201, 2231, 2232, 2233, 2234, 2235, 2236, 2237, 2239, 2273, 2282); Energy Reorganization Act of 1974, secs. 201, 202, 206, 211 (42 U.S.C. 5841, 5842, 5846, 5851); Nuclear Waste Policy Act of 1982, sec. 306 (42 U.S.C. 10226); National Environmental Policy Act of 1969 (42 U.S.C. 4332); 44 U.S.C. 3504 note; Pub. L. 115-439, 132 Stat. 5571.

### Source

Source: 91 FR 15794, Mar. 30, 2026, unless otherwise noted.