Document: NUREG-0800
Document ID: 3b207b59-015a-4145-be01-1f474ceec289
Document Type: srp
Title: MAIN CONDENSER EVACUATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070590.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.2
CFR Part: 
CFR Title: 

Content:
vacuation system is discussed in the following paragraphs.19 Compliance with GDC 60 requires that provisions be included in the nuclear power unit design to control suitably the release of radioactive materials in gaseous and liquid effluents during normal operation, including anticipated operational occurrences. GDC 60 is applicable to the design of the main condenser evacuation system because radioactive materials in both gaseous and liquid form are routinely processed in this system in BWRs during normal operation. In BWRs, the radioactivity in the main steam lines and the air ejector discharge are monitored to ensure that releases are suitably controlled. In PWRs, radioactive materials are processed in this system only if there is a primary-to-secondary steam generator tube leak. Measures are taken to detect primary-to-secondary leakage in PWRs by monitoring the radioactivity in the steam generator blowdown and in the air ejector discharge. DRAFT Rev.3 - April 1996 10.4.2-4 Regulatory Guide 1.26 specifies the quality group classification for the main condenser evacuation system that may contain radioactive materials. Meeting these requirements provides assurance that the release of radioactive materials in gaseous and liquid effluents from the main condenser evacuation system during normal operation, including anticipated operational occurrences, is kept as low as is reasonably achievable, in accordance with 10 CFR Part 50.20 Compliance with GDC 64 requires that means be provided for monitoring effluent discharge paths for radioactivity that may be released from normal operations, including anticipated operational occurrences, and from postulated accidents. GDC 64 is applicable to the main condenser evacuation system because this system is a normal discharge path for radioactivity in BWRs during normal operation, including anticipated operational occurrences. For PWRs, radioactivity detected in this system is usually the first indication of a