Document: NUREG-0800
Document ID: 9f13abda-ee55-4fa1-8276-db55ac2094ef
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070449.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
CFR Part: 
CFR Title: 

Content:
radioactive iodine exceeds the dose guidelines. A method of meeting GDC 19 would be to increase the filtration system size from 2,000 to 4000 cfm. This increased filtration will be sufficient to keep the estimated thyroid doses within the guidelines.103 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 procedures described in Regulatory Guide 1.78. As indicated in Section 2.22.2.1-2.2.2, no offsite storage or 104 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. DRAFT Rev. 3 - April 1996 6.4-20 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. Since toxic gas risk is related to site characteristics, this part of the evaluation will be completed at the COL stage of review.105 For design certification reviews, the findings will also summarize, to the extent that the review is not discussed in other safety evaluation report sections, the staff’s evaluation of inspections, tests, analyses, and acceptance criteria (ITAAC), including design acceptance criteria (DAC), site interface requirements, and combined license action items that are relevant to this SRP section.106 V. IMPLEMENTATION The following provides guidance to applicants and licensees regarding the staff's plans for using this SRP section. This SRP section will be used by the