Document: NUREG-0800
Document ID: c400c35a-87e7-4392-950a-36828ff5879f
Document Type: srp
Title: ESF ATMOSPHERE CLEANUP SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340760.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.5.1
CFR Part: 
CFR Title: 

Content:
ts, be able to actuate automatically, and be limited to-an air flow rate of approxi- mately 30,000 cfm. Design of instrumentation for ESF atmosphere cleanup systems should conform to the guidelines of Regulatory Guide 1.52 and to the recommendations of ANSI N509. Minimum instrumentation, readout, recording, and alarm provisions for ESF atmosphere cleanup systems are given in Table 6.5.1-1 of this SRP section. 6.5.1-3 Rev. 2 - July 1981 Environmental design guidelines for acceptability are based on the conditions following a DBA. Radiation source terms should be consistent with the guidelines in Regulatory Guides 1.3, 1.4, 1.7, and 1.25 (Ref. 1, 2, 3, and 4). Components such as demisters, heaters, prefilters, HEPA filters, mounting frames, filter housings, adsorbent, fans, ductwork and dampers should be designed, constructed and tested in accordance with ANSI 509-1980 design and qualification testing criteria. Water drain design and the accessibility of components and ease of maintenance should be in accordance with the recommendations of ERDA 76-21 (Ref. 8) and ANSI 509 (1980). Acceptability with respect to inplace testing should include meeting the requirements of ANSI N510-1980 (Ref. 7). For laboratory testing of activated carbon adsorbent, conformance with ANSI N509-1980 will be used as an acceptability criterion. ETSB will accept the following deviations from the above acceptance criteria for the post loss-of-coolant accident (LOCA) ESF atmosphere cleanup system: 1. If the calculated dose (sum of the long-term doses from the LOCA and the purge dose at the low population zone outer boundary) is less than the guidelines of 10 CFR Part 100, no filtration system is required. 2. If a radioiodine decontamination factor of 10 or less is needed for the calculated dose to be below Part 100, an atmosphere cleanup system that meets the acceptance criteria listed in Item 5 of Acceptance Criteria in SRP Section 11.3 is acceptable. 3. If a radioiodine decontamination factor