Document: NUREG-0800
Document ID: 853719df-a6ea-408b-8d43-5956155abc38
Document Type: srp
Title: and 8.3.2.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740246.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
nts causing regional effects. Operating experience provides additional information on offsite communications capability and integrity during severe weather events (Reference 22). 6. To ensure that the requirements of GDC 4 are satisfied, the organization responsible for the review of plant systems should review the location of SSCs of the preferred power system to determine the protection provided against dynamic effects, including effects of missiles, pipe whipping, and discharging fluids, that may result from equipment failures and from events and conditions outside the station. This information should be used to determine the possibility of simultaneous loss of both paths of preferred power. 7. To ensure that the requirements of GDC 5 are satisfied, the SSCs of the preferred power systems should be examined to identify any that are shared between units of a multi-unit station. These should be reviewed to ascertain that they have sufficient capacity and capability of performing all required safety functions in the event of an accident in one unit, with a simultaneous orderly shutdown and cooldown of the remaining units. Review of the design criteria should establish that the capacity and capability of incoming lines, power sources, and transformers for each required circuit have margin to achieve this. Spurious or false accident signals should not overload these circuits. SRP Section 8.3.1 further discusses spurious or false accident signal considerations. 8. The preferred power system instrumentation provided to monitor variables and equipment status should be identified during the electrical schematic and system description review. It should be ascertained that these instruments present status information that can be used to determine the condition of the preferred power system at all times. Review of the electrical schematics should determine that controls (automatic, manual, or remote) are provided to maintain these variables and systems within prescribed