Document: NUREG-0800
Document ID: 65414bbc-012c-477d-8c25-466f94c1671f
Document Type: srp
Title: GASEOUS WASTE MANAGEMENT SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350105.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11.3
CFR Part: 
CFR Title: 

Content:
B will assume a 3-week downtime every other year (10 days per year average). b. The capability of the system to process gaseous wastes at design basis fission product levels, i.e., from 1% of the fuel producing power inma PWR or, in a BWR, consistent with a noble gas release rate of 100 VCi/sec/MWt at 30 minutes delay. ETSB will review the operational flexibilities designed into the system, e.g., cross connections between subsystems, redundant or reserve processing equipment, and reserve storage capacity. In the evaluation of charcoal delay systems for radioactive gas decay, ETSB considers the bed dimensions, mass of charcoal, flow rate, temperatures, pressures, humidity, and dynamic adsorption coefficients to calculate the effective holdup times. 3. ETSB compares the quality group classification of piping and equipment in the gaseous waste management systems with che guidelines of Regulatory Guide 1.143. ETSB also compares the seismic design criteria of equipment and of structures housing the gaseous waste management systems with the design guidance identified in Regulatory Guide 1.143. The exceptions are transmitted to MEB, which has primary responsibility under SRP Sec- tions 3.2.1 and 3.2.2 and to SEB, which has primary responsibility under SRP Sections 3.3.1, 3.3.2, 3.5.3, 3.7.1, 3.7.2, 3.7.3, 3.7.4, 3.8.4, and 3.8.5. ETSB also determines if the applicant's design includes adequate provisions to stop continuous leakage paths after an explosion. The areas of concern are (1) streams where water decomposition gases (hydrogen and oxygen) exist in a BWR, (2) cover gas streams where air inleakage can occur in a PWR, and (3) where there is a possibility of liquid hydrocarbons .and ozone collecting in a cryogenic distillation system. 4. ETSB will compare the system design, system layout, equipment design, method of operation, and provisions to reduce leakage and to facilitate operations and maintenance to the guidelines of Regulatory Guide 1.143. ETSB will evaluate