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:
quire prior NRC approval if it renders it ineffective such that an accurate classification and timely declaration would not occur as required for an event. Examples include the following: (a) a change to mode applicability of the EAL that excludes an operating mode in which the EAL should be applicable, (b) a change to the logic of an EAL that would result in a particular event not being declared when the declaration would have occurred before the change, (c) a change that would replace a viable quantifiable EAL threshold (e.g., an instrument reading or alarm) with a qualitative EAL that relies on user judgment to reach a declaration, (d) a change to the EAL scheme that eliminates direct reading instrumentation EALs and relies instead on alternatives that cannot support timely and accurate classification (e.g., manual sampling and analysis), (e) a change that expresses field monitor EALs in radiation units (e.g., total effective dose equivalent) that could not be measured directly in the field and for which monitoring procedures offer no conversion algorithm, and DG-1324, Page 24 (f) a change to the language of a particular EAL that would render the classification logic unclear and could result in an inaccurate classification (e.g., a site area emergency EAL that reads “vandalism to safety-related equipment” without further qualification or quantification could be applied to events as diverse as someone putting graffiti on an inverter cabinet surface or someone hitting a safety injection pump casing with a sledge hammer). (3) A change could require prior NRC approval if it would result in an EAL that deviates from the meaning or intent of the approved EAL bases such that the classification of the event would be different from that approved by the NRC in a site-specific application or from an endorsed industry EAL scheme that had been approved for licensee use. f. The following examples would generally not require prior NRC approval: (1) A change to an EAL