Document: NUREG-0800
Document ID: 1d92e471-c01d-4c3b-8f23-e871a9de6e62
Document Type: srp
Title: describes the general procedures to be followed in reviewing any instrumentation and control
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500505.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
g a reactor trip, including protective system actions which could occur as a result of plant cooldown. For example, in the cooldown of a PWR, reactor cooling system pressure will eventually drop below the safety injection initiation setpoint. Since the control room is not available, it may be impossible to block this trip. Therefore, the remote shutdown capability must be able to accommodate this condition. Access to remote shutdown stations should be under strict administrative controls. The equipment in the remote shutdown stations should be designed to the same standards as the corresponding equipment in the main control room. Remote shutdown station control transfer devices should be located remote from the main control room and their use should initiate an alarm in the control room. The location should be consistent with the procedures for remote, alternative, and dedicated shutdown, as appropriate. Where the control functions are transferred between the control room and the remote shutdown station, the design should maintain parameter indications such that the operators at the control room and the remote shutdown station both have access to the same parameters that are being relied upon. • Safe shutdown — System conformance to the single-failure criterion on a system basis and operability from onsite and offsite electrical power as required by GDC 34, 35, and 38. In certain instances, it will be the Staff's judgment that, for a specific case under review, emphasis should be placed on specific aspects of the design, while other aspects of the design need not receive the same emphasis and in-depth review. Typical reasons for such a non-uniform emphasis are the introduction of new design features or the utilization in the design of features previously reviewed and found acceptable. However, in all cases, the review must be sufficient to conclude conformance to the acceptance criteria, i.e., the requirements of the NRC's regulations. IV. Evaluation Findings