Document: NUREG-0800
Document ID: e3249d77-0411-430a-9793-06aea8669075
Document Type: srp
Title: FISSION PRODUCT CONTROL SYSTEMS AND STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070474.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.3
CFR Part: 
CFR Title: 

Content:
redundancy, actuation signals, time to reduce region pressures below atmospheric, placement of ducting (see SAR Sections 6.2.3, 6.5.1, and 6.5.3). The reviewer is responsible for determining that each system can perform its functions as claimed to reduce fission product release following a postulated design basis accident. Information on fission product filter systems is provided 6.5.3-3 DRAFT Rev. 3 - April 1996 by the ETSB. Knowledge of fission products removal systems is necessary for 20 modeling the system for the dose calculation. CSB has responsibility for evaluating the pressure transient in the secondary containment to verify secondary containment region pressures following a design basis accident and for reviewing bypass leakage paths. MEB has responsibility for evaluating the structural design of the ventilation system.21 4. General design characteristics, e.g., negative pressure during normal operation, free volumes and mixing regions, and leakage rates (see SAR Sections 6.2.3, 6.5.3, and 9.4). Knowledge of these parameters is necessary for developing the mathematical model for dose calculations.22 C. ESF Ventilation System Design23 The ventilation system used to control fission products and the capability to maintain a negative pressure during accident conditions (see SAR Sections 9.4.1 through 9.4.5).24 Review Interfaces25 1. A secondary review is performed by the Effluent Treatment Systems Branch (ETSB)EMCB and the results are used by AEBSPLB in the overall review of the 26 27 fission product control systems and structures. 2. ETSBPERB reviews the efficiencies of filters used in the fission product control 28 systems. The results of the ETSBPERB review are transmitted to AEBSPLB for use 29 30 in the evaluation. 3. In addition, AEBSPLB will coordinate the evaluations of with other branches those 31 evaluations that interface with the overall review of the system, as follows: 32 33 a. The Containment Systems and Severe Accident Branch (CSB)(SCSB)