Document: NUREG-0800
Document ID: 805f7e09-51a2-413b-92af-e23bb9073497
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070493.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8
CFR Part: 
CFR Title: 

Content:
BTP ICSB 18 (PSB), "Application of the Single Failure Criterion to Manually-Controlled Electrically-Operated Valves," also applies to these isolation valves and should be used in conjunction with this position.12 B. BRANCH TECHNICAL POSITION The following features should be incorporated in the design of MOIV systems for safety injection tanks to meet the intent of IEEE Std 279: 1. Automatic opening of the valves when either primary coolant system pressure exceeds a preselected value (to be specified in the technical specifications), or a safety injection signal is present. Both primary coolant system pressure and safety injection signals should be provided to the valve operator. 2. Visual indication in the control room of the open or closed status of the valve. 3. An audible and visual alarm, independent of item 2., above, that is actuated by a sensor on the valve when the valve is not in the fully-open position. 4. Utilization of a safety injection signal to remove automatically (override) any bypass feature that may be provided to allow an isolation valve to be closed for short periods of time when the reactor coolant system is at pressure (in accordance with provisions of the technical specifications). Conformance with the relevant criteria for operating bypasses described in IEEE Std 603 (Reference 4), as endorsed in Regulatory Guide 1.153, constitutes an acceptable alternative approach.13 8A-5 DRAFT Rev. 3 - April 1996 It should be noted that BTP ICSB-18 (PSB), "Application of the Single Failure Criterion to Manually-Controlled Electrically-Operated Valves," (Reference 2) may also be applied to these isolation valves and should be used, where applicable, in conjunction with this Branch Technical Position.14 C. REFERENCES15 1. Regulatory Guide 1.153, "Criteria for Power, Instrumentation, and Control Portions of Safety Systems."16 32. BTP ICSB-18 (PSB), "Application of the Single Failure Criterion to Manually 17 Controlled Electrically Operated Valves." 13.