# Plant-Specific Applicability of Transition Break Size Specified in 10 CFR 50.46a
> **Nuclear Regulatory Commission** · Draft regulatory guide; discontinuation and withdrawal. · Published 2016-12-08 · Effective 2016-12-08 · 81 FR 88615
## Document
- **Document number:** 2016-29390
- **Category:** nuclear-safety
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 81 FR 88615
- **CFR reference:** 10 CFR 50
- **Publication date:** 2016-12-08
- **Effective date:** 2016-12-08
- **Energy docket:** NRC-2010-0229
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is announcing the discontinuation of further regulatory action on Draft Regulatory Guide (DG) DG-1216, "Plant-Specific Applicability of Transition Break Size Specified in 10 CFR 50.46a," and its withdrawal. Draft Regulatory Guide DG-1216 was a proposed new regulatory guide written to provide implementing guidance for a proposed rule "Risk-Informed Changes to Loss-of-Coolant Accident Technical Requirements," (Emergency core cooling system (ECCS) rulemaking)) that provided a voluntary, alternate approach for evaluating the performance of an ECCS. The NRC is discontinuing further regulatory action on the DG and not publishing the DG in final form because the NRC has discontinued the underlying rulemaking.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/12/08/2016-29390/plant-specific-applicability-of-transition-break-size-specified-in-10-cfr-5046a)
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