Document: NUREG-0800
Document ID: 8c2fce42-281a-4a50-9de7-513df024f27c
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340712.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
CFR Part: 
CFR Title: 

Content:
The resultant whole body doses are within the guidelines of General Design Criterion 19. The thyroid dose resulting from exposure to radioactive iodine exceeds the dose guidelines. A method of meeting GDC 19 would be to increase the filtration system size from 2000 cfm to 4000 cfm. This Increased filtration will be sufficient to keep the estimated thyroid doses within the guidelines. If special protection provisions for toxic gases are not required, the following statement or its equivalent is made: The habitability of the control room was evaluated using the pro- cedures described in Regulatory Guide 1.78. As indicated in Section 2.2, no offsite storage or transport of chemicals is close enough to the plant to be considered a hazard. There are no onsite chemicals that can be considered hazardous under Regulatory Guide 1.78. A sodium hypochlorite biocide system will be used, thus eliminating an onsite chlorine hazard. Therefore, special provisions for protection against toxic gases will not be required. In accordance with plant emergency plans 'and procedures, self-contained breathing apparatus is provided for assurance of control room habitability in the event of occurrences such as smoke hazards. If special protection provisions are required for toxic gases, compliance or noncompliance with the guidelines of Regulatory Guides 1.78 and 1.95 should be stated. V. IMPLEMENTATION The following provides guidance to applicants and licensees regarding the staff's plans for using this SRP section. Except in those cases in which the applicant proposes an acceptable alter- native method for complying with specified portions of the Commission's regulations, the method described herein will be used by the staff in its evaluation of conformance with Commission regulations. 6.4-15 Rev. 2 - July 1981 Implementation schedules for conformance to parts of the method discussed herein are contained in the referenced regulatory guides. VI. REFERENCES 1. 10 CFR Part 50, Appendix A,