Document: 10 CFR Part 50
Document ID: 96de988b-1ca6-4fa0-b3f6-45aa1e23985a
Document Type: cfr
Title: Immediate notification requirements for operating nuclear power reactors.
Source: 10 CFR Part 50
Source URL: https://www.ecfr.gov/current/title-10/part-50/section-50.72
Revision Date: 
Chapter: 
Section ID: 50.72
CFR Part: 50
CFR Title: 10

Content:
i ) any further degradation in the level of safety of the plant or other worsening plant conditions, including those that require the declaration of any of the Emergency Classes, if such a declaration has not been previously made, or ( ii ) any change from one Emergency Class to another, or ( iii ) a termination of the Emergency Class. ( 2 ) Immediately report ( i ) the results of ensuing evaluations or assessments of plant conditions, ( ii ) the effectiveness of response or protective measures taken, and ( iii ) information related to plant behavior that is not understood. ( 3 ) Maintain an open, continuous communication channel with the NRC Operations Center upon request by the NRC. [ 48 FR 39046 , Aug. 29, 1983; 48 FR 40882 , Sept. 12, 1983; 55 FR 29194 , July 18, 1990, as amended at 56 FR 944 , Jan. 10, 1991; 56 FR 23473 , May 21, 1991; 56 FR 40184 , Aug. 13, 1991; 57 FR 41381 , Sept. 10, 1992; 58 FR 67661 , Dec. 22, 1993; 59 FR 14087 , Mar. 25, 1994; 65 FR 63786 , Oct. 25, 2000; 72 FR 49502 , Aug. 28, 2007; 85 FR 65662 , Oct. 16, 2020; 87 FR 20697 , Apr. 8, 2022; 88 FR 15880 , Mar. 14, 2023] Footnotes - 50.72 [ 1 ] Other requirements for immediate notification of the NRC by licensed operating nuclear power reactors are contained elsewhere in this chapter, in particular §§ 20.1906 , 20.2202 , 50.36 , 72.74 , 72.75 , and 73.1200 . [ 2 ] These Emergency Classes are addressed in Appendix E of this part . [ 3 ] Requirements for ERDS are addressed in Appendix E, Section VI. [ 4 ] Actuation of the RPS when the reactor is critical is reportable under paragraph (b)(2)(iv)(B) of this section.