Document: NUREG-0800
Document ID: b75d082b-2493-4543-981a-2ee136d737cf
Document Type: srp
Title: BTP 8-9-1
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1405/ML14057A433.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8
CFR Part: 
CFR Title: 

Content:
Classification Class 1E detection and actuation circuits at the ESF bus level meet the applicable requirements of GDC 17. A non-Class-1E detection and actuation circuit at the non-Class1E level may be acceptable if the following is satisfied: A detection/protection scheme providing equivalent function at the high voltage circuit (non-Class-1E) is acceptable to the NRC if the licensee can demonstrate compliance with NRC regulations in 10 CFR 50.55a (h)(2) or 10 CFR 50.55a(h)(3), “Protection Systems,” BTP 8-9-4 Draft Revision 0 – May 2014 otherwise, an alternative to the requirements of 10 CFR 50.55a (h)(2) or 10 CFR 50.55a(h)(3) should be submitted and authorized prior to implementation in accordance with 10 CFR 50.55a(a)(3) or an exemption to these requirements in accordance with 10 CFR 50.12, “Specific exemptions,” must be processed. IV. Updated Final Safety Analysis Report The Updated Final Safety Analysis Report (UFSAR) should be updated to discuss the design features and analyses related to the effects of, and protection for, any open phase condition design vulnerability. This update would typically be to Chapter 8 of the UFSAR and completed in conjunction with the 10 CFR 50.71(e) requirements. V. Protective Actions For an open phase condition, the staff finds the following method for meeting the design requirements acceptable: (1) With no accident condition signal present, the licensee/applicant should demonstrate that: a. The condition does not adversely affect the function of important-to-safety structures, systems and components; and b. Abnormal operating occurrence, transients, events, and accidents (e.g., RCP seal failure) would not be created as a result of the condition; c. Important-to-safety equipment is neither prevented from operating because protective devices are actuated nor damaged by the condition; and d. Safe Shutdown capability is not compromised for all operating and anticipated operational occurrences. (2) With an accident