Document: NUREG-0800
Document ID: faf774de-7226-41f8-ba11-7cf612907af6
Document Type: srp
Title: GASEOUS WASTE MANAGEMENT SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1306/ML13065A119.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.3
CFR Part: 
CFR Title: 

Content:
ection II.D of Appendix I. RG 1.110 describes methods for performing such cost-benefit analyses. With respect to the types and locations of exhaust ventilation discharge points (e.g., plant stacks and building vents), the review should confirm that the information in FSAR Section 9.4 properly characterizes release heights, exhaust flow and velocity rates, and exit temperatures in determining compliance with ECLs of Part 20, Appendix B and doses to members of the public. 4. The review of the GWMS design capacity will encompass the following major areas: A. The capability of the GRS to process gaseous wastes in the event of a single major equipment item failure. For nonredundant equipment or components, a 3-week downtime every other year will be assumed (10 days per year average). B. The total system capability to process gaseous wastes at design-basis source term levels is evaluated based on information discussed in SRP Section 11.1, and in this SRP section. The source term is based on a combination of assumptions of failed fuel fractions, BWR offgas release rates, TS limits for halogens and noble gases, presence of activation and corrosion products, and steam generator TS limits on allowable primary-to-secondary leakage rates. The design basis of the reactor coolant and reactor steam source terms is based on: 1) an offgas system noble gas release rate of 3.7 megabecquerels per second per megawatt thermal (MBq/s per MWt) (100 microcuries (μCi)/s per MWt) measured or estimated after a 30-minute delay for BWRs; 11.3-24 Draft Revision 4 – August 2014 2) an assumed 1 percent fuel cladding defects for PWRs; and 3) technical specification limits for halogens (I-131 dose equivalent) and noble gases (Xe-133 dose equivalent), as defined in plant-specific TS. C. The operational flexibility designed into the GRS (e.g., cross-connections between systems, redundant or reserve processing equipment, and reserve storage capacity, including the use of mobile processing and