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:
s acceptance criteria based on the requirements of the following 40 regulations: A. General Design Criterion 41 (GDC 41) (Ref. 1) as it relates to the containment 41 42 atmosphere cleanup system being designed to control fission product releases to the environment following postulated accidents. B. General Design Criterion 42 (GDC 42) (Ref. 2) as it relates to the containment 43 44 atmosphere cleanup system being designed to permit periodic inspections. C. General Design Criterion 43 (GDC 43) (Ref. 3) as it relates to the containment 45 46 atmosphere cleanup system being designed to permit appropriate functional testing. Specific criteria necessary to meet the relevant requirements of GDC General Design Criteria 41, 42, and 43 are: 47 1. Primary Containment Primary containment design leakage rates for which credit is given should not be less than 0.1% per day due to difficulties in measuring lower leakage rates. Containment isolation methods and times must be such that the calculated radiological doses resulting from the escape of radioactive material prior to and following isolation after a LOCA do not exceed the dose guidelines of 10 CFR Part 100 (Ref. 4) in accordance with the appropriate sections in SAR 48 Chapter 15.0. The primary reactor containment and associated systems should be designed so that periodic inspections and functional testing can be performed.49 2. Secondary Containment To be classified as a secondary containment for the purpose of fission product control, a structure or structures should completely surround the primary containment, and at least should be held at a pressure of 0.6 cm (0.25 in)50 6.5.3-5 DRAFT Rev. 3 - April 1996 (water), below adjacent regions, under all wind conditions up to the wind speed at which diffusion becomes great enough to assureensure site boundary exposures 51 less than those calculated for the design basis accidents even if exfiltration occurs. Acceptance of other fission product control structures for collection