Document: NUREG-0800
Document ID: 89a50aec-b387-4999-9c8e-3b8e4f289a55
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070800027.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3
CFR Part: 
CFR Title: 

Content:
Containment." The corrected attachment is Appendix B to this position. 5. Letter from J. F. O'Leary, Director of Licensing, to applicants, reactor vendors, and architect-engineers, July 12, 1972, and attachment entitled "Criteria for Determination of Postulated Break and Leakage Locations in High and Moderate Energy Fluid Piping Systems Outside of Containment Structures." The letter and attachment is Appendix C to this position. BTP 3-3-7 Revision 3 - March 2007 APPENDIX A DEFINITIONS Essential Systems and Components. Systems and components required to shut down the reactor and mitigate the consequences of a postulated piping failure, without offsite power. Fluid Systems. High and moderate energy fluid systems that are subject to the postulation of piping failures outside containment against which protection of essential systems and components is needed. High Energy Fluid Systems. Fluid systems that, during normal plant conditions are either in operation or maintained pressurized under conditions where either or both of the following are met: a. Maximum operating temperature exceeds 95 EC (200 EF), or b. Maximum operating pressure exceeds 1900 kPa (275 psig). Moderate Energy Fluid Systems. Fluid systems that, during normal plant conditions, are either in operation or maintained pressurized (above atmospheric pressure) under conditions where both of the following are met: a. Maximum operating temperature is 95 EC (200 EF) or less, and b. Maximum operating pressure is 1900 kPa (275 psig) or less Normal Plant Conditions. Plant operating conditions during reactor startup, operation at power, hot standby, or reactor cooldown to cold shutdown condition. Upset Plant Conditions. Plant operating conditions during system transients that may occur with moderate frequency during plant service life and are anticipated operational occurrences, but not during system testing. Postulated Piping Failures. Longitudinal and circumferential breaks in high energy fluid system piping and