---
kind: "section"
citation: "10 C.F.R. § 63.113"
title: "10"
number: "63.113"
heading: "Performance objectives for the geologic repository after permanent closure."
url: "https://uscodex.org/cfr/10/63.113"
---

# §63.113. Performance objectives for the geologic repository after permanent closure.

- (a) The geologic repository must include multiple barriers, consisting of both natural barriers and an engineered barrier system.
- (b) The engineered barrier system must be designed so that, working in combination with natural barriers, radiological exposures to the reasonably maximally exposed individual are within the limits specified at [§ 63.311](/cfr/10/63.311.md) of [subpart L](/cfr/10/subpartL.md) of this part. Compliance with this paragraph must be demonstrated through a performance assessment that meets the requirements specified at [§ 63.114](/cfr/10/63.114.md) of this subpart, and §§ [63.303](/cfr/10/63.303.md), [63.305](/cfr/10/63.305.md), [63.312](/cfr/10/63.312.md) and [63.342](/cfr/10/63.342.md) of [Subpart L](/cfr/10/subpartL.md) of this part.
- (c) The engineered barrier system must be designed so that, working in combination with natural barriers, releases of radionuclides into the accessible environment are within the limits specified at [§ 63.331](/cfr/10/63.331.md) of [subpart L](/cfr/10/subpartL.md) of this part. Compliance with this paragraph must be demonstrated through a performance assessment that meets the requirements specified at [§ 63.114](/cfr/10/63.114.md) of this subpart and §§ [63.303](/cfr/10/63.303.md), [63.332](/cfr/10/63.332.md) and [63.342](/cfr/10/63.342.md) of [subpart L](/cfr/10/subpartL.md) of this part.
- (d) The ability of the geologic repository to limit radiological exposures to the reasonably maximally exposed individual, in the event of human intrusion into the engineered barrier system, must be demonstrated through an analysis that meets the requirements at §§ [63.321](/cfr/10/63.321.md) and [63.322](/cfr/10/63.322.md) of [subpart L](/cfr/10/subpartL.md) of this part. Estimating radiological exposures to the reasonably maximally exposed individual requires a performance assessment that meets the requirements specified at [§ 63.114](/cfr/10/63.114.md) of this subpart, and §§ [63.303](/cfr/10/63.303.md), [63.305](/cfr/10/63.305.md), [63.312](/cfr/10/63.312.md) and [63.342](/cfr/10/63.342.md) of [subpart L](/cfr/10/subpartL.md) of this part.

## Notes

### Authority

Authority: Atomic Energy Act of 1954, secs. 51, 53, 62, 63, 65, 81, 161, 182, 183, 223, 234 (42 U.S.C. 2071, 2073, 2092, 2093, 2095, 2111, 2201, 2232, 2233, 2273, 2282); Energy Reorganization Act of 1974, secs. 201, 202, 206, 211 (42 U.S.C. 5841, 5842, 5846, 5851); 42 U.S.C. 2021a; National Environmental Policy Act of 1969 (42 U.S.C. 4332); Nuclear Waste Policy Act of 1982, secs. 114, 117, 121 (42 U.S.C. 10134, 10137, 10141); 44 U.S.C. 3504 note.

### Source

Source: 66 FR 55792, Nov. 2, 2001, unless otherwise noted.