Document: NUREG-0800
Document ID: d53aca30-dbc8-4ddf-8aa5-2b1d5f31d140
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070850008.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
CFR Part: 
CFR Title: 

Content:
erator error, component malfunction) should not be considered as the single active failure. The analyses should assume the most limiting allowable operating conditions and systems configuration at the time of the postulated cause of the overpressure event. All potential overpressurization events should be considered when establishing the worst-case event. Some events may be prevented by using protective interlocks or by locking out power. These events should be identified individually. If the analysis excludes the events, the controls to prevent these events should be in the plant technical specifications. 4. The design of the system should use Institute of Electrical and Electronics Engineers (IEEE) Standard 603 as guidance. The system may be manually enabled; however, an alarm should be provided to alert the operator to enable the system at the correct plant condition during cooldown. Positive indication should be provided to indicate when the system is enabled. An alarm should activate when the protective action is initiated. The reviewer responsible for instrumentation and controls will assist in reviews of the design criteria and the design for the low-temperature overpressure protection system controls and instrumentation, as described in Subsection I of SRP Section 5.2.2. 5. To ensure operational readiness, the overpressure protection system should be testable. Technical specification surveillance requirements should include the following: A. A test performed to ensure operability of the system (exclusive of relief valves) before each shutdown. BTP 5-2-3 Revision 3 - March 2007 B. A test for valve operability, as a minimum, to be conducted as specified in the ASME Code Section XI. 6. The system must meet the requirements of Regulatory Guide 1.26 and Section III of the ASME Code. 7. The design of the overpressure protection system should function during an operating- basis earthquake. It should not compromise the design criteria of any other safety- grade