Document: NUREG-0800
Document ID: 823e391d-388d-4df0-bcc0-7df2a1c98db9
Document Type: srp
Title: B-10
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A226.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
Draft Revision 6 – August 2015 4.11. Channel Bypass and Removal from Operation (IEEE Std 279-1971, Clause 4.11) The review of bypass and removal from operations should be coordinated with the organization that is responsible for the format of technical specifications to confirm that the provisions for this bypass are consistent with the required actions of the proposed plant technical specifications. 4.12. Operating Bypass (IEEE Std 279-1971, Clause 4.12) The requirement for automatic removal of operational bypasses means that the reactor operator shall have no role in such removal. The operator may take action to prevent the unnecessary initiation of a protective action. 4.13. Indication of Bypass (IEEE Std 279-1971, Clause 4.13) Guidance on bypasses and inoperable status indication is provided in RG 1.47, “Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety System.” 4.14. Access to Means for Bypassing (IEEE Std 279-1971, Clause 4.14) Administrative control is acceptable to ensure that access to the means for bypassing is limited to qualified plant personnel and that permission of the control room operator is obtained to gain access. 4.15. Multiple Setpoints (IEEE Std 279-1971, Clause 4.15) The staff interpretation of “positive means” is that automatic action is provided to ensure that the more restrictive setpoint is used when required. SRP BTP 7-3 provides additional guidance on multiple setpoints used to allow operation with reactor coolant pumps out of service. 4.16. Completion of a Protective Action Once it is Initiated (IEEE Std 279-1971, Clause 4.16) The staff review of this item should include review of functional and logic diagrams to ensure that “seal-in” features are provided to enable system-level protective actions to go to completion. The seal-in feature may incorporate a time delay as appropriate for the safety function. Additionally, the seal-in feature need not function until it is confirmed that a valid