Document: NRC Regulatory Guide
Document ID: 3e914c02-41b3-4c0b-9c94-7e4a07215354
Document Type: regulatory_guide
Title: Guidance on Making Changes to Emergency Plans for Nuclear Power Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1505/ML15054A370.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.219
CFR Part: 
CFR Title: 

Content:
n and design basis will change over the duration of the decommissioning as the licensee puts modifications into place authorized under the applicable change processes, such as 10 CFR 50.59. The 10 CFR 50.54(q)(2) requirement to maintain the effectiveness of the emergency plan that meets the requirements in Appendix E and the planning standards of §50.47(b) remains in force until the licensee receives an exemption under 10 CFR 50.12, or the license is terminated. During this period, the NRC must continue to have reasonable assurance that adequate protective measures can and will be taken in the event of a radiological emergency. See Section 1.1 of this guide for additional information. (2) The planning basis for emergency preparedness was not based on any particular accident, but rather, a spectrum of accidents including minor transients, design-basis events, and severe accidents. The NRC’s emergency planning regulations, regulatory guidance, and the emergency plan approvals are rooted, in part, in this planning basis. The planning put in place to address design-basis accidents, such as the large break loss-of-coolant accident, provides a substantial base for responding to the more severe events encompassed in the emergency preparedness planning basis. (3) Although certain design-basis accidents analyzed in the facility’s licensing basis may no longer be applicable because of the permanent cessation of operation, or by changes to the FSAR, the need for emergency planning remains as long as radioactive material remains onsite. A licensee considering reductions in resources, capabilities, and methods described in its emergency plan must consider whether these reductions involve a reduction in effectiveness of the emergency plan to maintain the capability to mount an adequate response to the remaining transients, design-basis accidents, and severe accidents (e.g., spent fuel pool fire). b. The reduction in effectiveness evaluation is a comparison between the