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:
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 condition signal present, the licensee/applicant should demonstrate that: a. Automatic detection and actuation will transfer loads required to mitigate postulated accidents to an alternate source and ensure that safety functions are preserved, as required by the current licensing bases. b. Alternatively, a licensee/applicant may demonstrate by analytical analyses and actual testing that all design basis accident acceptance criteria and GDC17 or equivalent criterion are met with the open phase condition, given other plant design features. The analyses should include all design and licensing basis assumptions including single failure criterion. (3) Following protection system requirements should be met for the open phase condition: The voltage or current sensors should be designed to satisfy the following applicable requirements 10 CFR 50.55a(h)(2) or (h)(3) derived from IEEE Std. 279 and/or IEEE Std. 603, as endorsed by RG 1.153: BTP 8-9-5 Draft Revision 0 – May 2014 i. Class 1E equipment should be used and should be physically located at and electrically connected to the Class 1E switchgear. ii. An independent scheme should be provided for each division of the Class 1E power system. iii. The open phase protection should include coincidence logic on a per bus basis to preclude spurious trips of the offsite power source. iv. The open phase protective devices should automatically initiate the disconnection of offsite power sources whenever the setpoints and time delay limits have been exceeded. v. Capability for test and calibration during power operation should be provided. vi. Annunciation must be provided in the control room for any bypasses incorporated in the design. If the non-Class 1E open phase circuit protection schemes are installed on the offsite power