Document: NUREG-0800
Document ID: 0e8ea974-9b26-4bf5-9ca9-ca9814ad85b6
Document Type: srp
Title: STEAM GENERATOR BLOWDOWN SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550004.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.8
CFR Part: 
CFR Title: 

Content:
e design is in accordance with the provisions of Regulatory Guide 1.143, Position C.1.1 downstream of the outer containment isolation valves. 2. The requirements of GDC 13 are met when the SGBS design includes provisions to monitor system parameters and maintain them within a range that allows the system to perform its impurity removal function and thereby assist in maintaining the integrity of the reactor coolant pressure boundary. 3. The requirements of GDC 14 are met when the SGBS design includes provisions to control secondary water chemistry to maintain the integrity of the primary coolant boundary. Acceptance is based on meeting the following: A. The SGBS is sized to accommodate the design blowdown flow needed to maintain secondary coolant chemistry for normal operation, including anticipated operational occurrences. B. Equipment capacities are based on design blowdown flow rates and are such that temperature limits for heat-sensitive processes are not exceeded. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. Meeting the requirements of GDC 1 provides assurance that failure of any component in the SGBS will not result in loss of reactor coolant and subsequent fuel damage. Compliance with GDC 1 further ensures that the reactor coolant pressure boundary will not be degraded by adverse secondary water chemistry conditions. 2. Meeting the requirements of GDC 2 provides a level of assurance that the reactor coolant pressure boundary will maintain its integrity after a design basis earthquake. 10.4.8-5 Revision 3 - March 2007 3. Meeting the requirements of GDC 13 provides a level of assurance that the system will operate in a range that maintains the integrity of the reactor coolant pressure boundary. 4. Meeting the requirements of GDC 14 provides a level of assurance that the probability of leakage from or rapidly propagating