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:
neering judgment involved in their evaluation. Using the approach indicated in Reference 6, the source terms and doses due to a DBA are calculated. The source terms determined by the AEB's independent analysis of low population zone (LPZ) doses for a LOCA are used. The methods and assumptions for this calcu- lation are presented In Appendix A to SRP Section 15.6.5. The control room doses are determined by estimating the X/Q from the source points to the emergency zone using meteorological input supplied by the assigned meteorologist, by determining the credit for the emergency zone's protec- tion features, and by calculating the dose. The attached Table 6.4-1 is a form which may be used to summarize the information that is needed for the control room dose calculation. The effective X/Q's are used for cal- culating the doses. The dose is then compared with the guidelines of GDC 19. If the guideline values are exceeded, the applicant will be requested to improve the system. In the event that other DBAs are expected to result in doses comparable to or higher than the LOCA, additional analyses are performed. The limiting consequences of the accidents are compared with Criterion 19. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and that the review and calculations support conclusions of the following type, to be included in the staff's safety evaluation report (note: items 2 and 3 should be included only if appropiate): We conclude that the control room habitability system of the (insert PLANT NAME) facility is acceptable and meets the requirements of the following General Design Criteria: 1. GDC 19, "Control Room," with respect to maintaining the control room in a safe and habitable condition under accident conditions by providing adequate protection against radiation and toxic gases such that the radiological exposures are within the limits of this criterion, and 2. GDC 4, "Environmental and Missile Design Bases," with