Document: NUREG-0800
Document ID: 80984faf-c3eb-49b6-96d0-06b62c9c59f2
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070710466.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8
CFR Part: 
CFR Title: 

Content:
lear Regulatory Commission, Washington, DC 20555, Attention: Reproduction and Distribution Services Section, or by fax to (301) 415-2289; or by email to DISTRIBUTION@nrc.gov. Electronic copies of this section are available through the NRC's public Web site at http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0800/, or in the NRC's Agencywide Documents Access and Management System (ADAMS), at http://www.nrc.gov/reading-rm/adams.html, under Accession # ML070710466. NUREG-0800 U.S. NUCLEAR REGULATORY COMMISSION STANDARD REVIEW PLAN BRANCH TECHNICAL POSITION (BTP) 8-5 SUPPLEMENTAL GUIDANCE FOR BYPASS AND INOPERABLE STATUS INDICATION FOR ENGINEERED SAFETY FEATURES SYSTEMS REVIEW RESPONSIBILITIES Primary - Organization responsible for electrical engineering Secondary - None A. BACKGROUND The guidance of RG 1.47 needs further details as to the methods for providing an acceptable design for the bypass and inoperable status indicators for engineered safety feature (ESF) systems. The purpose of this BTP is to provide supplemental guidance for implementing RG 1.47. This BTP also supplements the criteria for bypass and inoperable status indication described in IEEE Std. 603, as endorsed by RG 1.153. B. BRANCH TECHNICAL POSITION The design criteria for bypass and inoperable status indication systems for ESFs should reflect the importance of providing accurate information for the operator and reducing the possibility for the indicating equipment to adversely affect the monitored safety systems. In developing the design criteria, the following should be considered: BTP 8-5-2 Revision 3 - March 2007 1. The bypass indicators should be arranged to enable the operator to determine the status of each safety system and whether continued reactor operation is permissible. 2. When a protective function of a shared system can be bypassed, indication of that bypass condition should be provided in the control room of each affected unit. 3. The means by which the operator can cancel