# Criticality Accident Requirements
> **Nuclear Regulatory Commission** · Final rule. · Published 1998-11-12 · Effective 1998-12-14 · 63 FR 63127
## Document
- **Document number:** 98-30253
- **Category:** other
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 63 FR 63127
- **CFR reference:** 10 CFR 50
- **Publication date:** 1998-11-12
- **Effective date:** 1998-12-14
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is amending its regulations to give licensees of light-water nuclear power reactors greater flexibility in meeting the requirement that licensees authorized to possess more than a small amount of special nuclear material (SNM) maintain a criticality monitoring system in each area in which the material is handled, used, or stored. This action is taken as a result of the experience gained in processing and evaluating a number of exemption requests from such licensees and NRC's safety assessments in response to these requests that concluded that the likelihood of criticality was negligible.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/11/12/98-30253/criticality-accident-requirements)
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