Document: NUREG-0800
Document ID: 91a12934-f0d9-4573-ad3b-553ab75dabc0
Document Type: srp
Title: FISSION PRODUCT CONTROL SYSTEMS AND STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600408.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.3
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CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of reactor accident consequence assessment, specifically design basis containment and ventilation performance Secondary - Organization responsible for structural design of containment and systems Organization responsible for radiation protection I. AREAS OF REVIEW The description of the fission product control systems and structures is reviewed to (a) provide a basis for developing the mathematical model for design basis loss-of-coolant accident (LOCA) dose computations, (b) verify that the values of certain key parameters are within pre-established limits, (c) confirm the applicability of important modeling assumptions, and (d) verify the functional capability of ventilation systems used to control fission product releases. The parameters that must be established for use in the calculation of the radiological consequences of accidents in Chapter 15 of the safety evaluation report (SER) and the systems whose functions must be reviewed are outlined below. Many of these areas are the responsibility of staff and are reviewed by the organization responsible for the review of reactor accident consequence assessment, specifically design basis containment and ventilation performance, to provide a general knowledge of the containment systems and their operation following a LOCA. 6.5.3-2 Revision 3 - March 2007 The specific areas of review are as follows: 1. Primary Containment Design A. Primary containment characteristics, including (1) the containment isolation times and methods; (2) leak rates prior to and following containment isolation if venting, vacuum relief, or purging of the containment is permitted (by technical specification) during operation; (3) total and mixing volumes to be assumed from the recirculation characteristics given in safety analysis reports (SARs); and (4) the efficiencies of the engineered safety features (ESF) filters used for postaccident ventilation. Each of the