Document: NRC Regulatory Guide
Document ID: 8322a959-849d-4ec6-926e-1f30ed96d71f
Document Type: regulatory_guide
Title: Periodic Testing of Protection System Actuation Functions (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0833/ML083300530.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.22
CFR Part: 
CFR Title: 

Content:
ovisions of regulatory positions 3 and 4 below. 3. Where the ability of a system to respond to a bona fide accident signal is intentionally bypassed for the purpose of performing a test during reactor operation: a. Positive means should be provided to prevent expansion of the bypass condition to redundant or diverse systems, and b. Each bypass condition should be individually and automatically indicated to the reactor operator in the main control room. 4. Where actuated equipment is not tested during reactor operation, it should be shown that: a. There is no practicable system design that would permit operation of the actuated equipment without adversely affecting the safety or operability of the plant; RG-1.22, Page 4 b. The probability that the protection system will fail to initiate the operation of the actuated equipment is, and can be maintained, acceptably low without testing the actuated equipment during reactor operation, and c. The actuated equipment can be routinely tested when the reactor is shut down.