Document: NUREG-0800
Document ID: 0dcda381-7ccf-499e-b926-b844f97fc4cf
Document Type: srp
Title: MAIN CONDENSERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070586.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.4.1
CFR Part: 
CFR Title: 

Content:
BWRs with no main steam isolation valve leakage control system). If this is the case, a seismic analysis should be performed to ensure that the condenser anchorages and the piping inlet nozzle to the condenser are capable of maintaining their structural integrity during and after an SSE.26 2. The reviewer evaluates the MC system design to verify that: a. Means have been provided for detecting, controlling and correcting condenser cooling water leakage into the condensate. 10.4.1-5 DRAFT Rev. 3 - April 1996 b. The permissible cooling water inleakage and time of operation with inleakage are provided to assureensure that condensate/feedwater quality can be maintained 27 within safe limits. c. Measures have been provided to detect radioactive leakage into and out of the MC system and to preclude unacceptable accidental releases of radioactivity to the environment from the system. d. The system is provided with instrumentation and control features that determine and verify that the MC is operating in a correct mode. 3. The reviewer uses engineering judgment and the results of failure modes and effects analyses to determine that: a. The failure of a main condenser and the resulting flooding will not preclude operation of any essential systems. Reference to sections of the SAR describing plant features and the general arrangement and layout drawings will be necessary, as well as the SAR tabulation of seismic design classifications for structures and systems. Statements in the SAR that verify that the above conditions are met are acceptable. b. The system, in conjunction with the main steam system, has provisions to detect loss of condenser vacuum and to effect isolation of the steam source. For direct cycle plants, it will be acceptable if the detection system in the MC can actuate the main steam isolation valves to limit the quantity of steam lost fromto the 28 main condenser. 29 c. Design provisions have been incorporated into the MC that will preclude component or tube