Document: NUREG-0800
Document ID: 1c401e6c-8c2d-47df-b05f-2978939cbd15
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550069.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
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re identified, protective measures against them should be reviewed. Typical sources in this category include contaminated filter trains, or airborne radioactivity in enclosures adjacent to the control room. Evaluations of radiation shielding effectiveness with respect to the above items should be performed using simplified analytical models for point, line, or volume sources such as those presented in References 12 and 13. If more extended analysis is necessary, analytical support from the organization responsible for the review of design basis accident radiological consequence analyses should be requested. The applicant's coverage of the above items should also be reviewed in terms of completeness, method of analysis, and assumptions. 7. Independent Analyses. Pursuant to GDC 19, the applicant is required to calculate doses to the control room operators. Independent analyses are made by the organization responsible for the review of design basis accident radiological consequence analyses because of the diversity of control room habitability system designs and the engineering judgment involved in their evaluation. Since this analysis involves site-related characteristics, it can be finalized only at the COL stage of review. Using the approach indicated in RG 1.195 or RG 1.183, the source terms and doses due to each DBA are calculated. The source terim is determined by an independent analysis of low population zone (LPZ) doses for each DBA, by the organization responsible for the review of design basis accident radiological consequence analysis. The dose is then compared with the requirements 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 GDC 19. 8. Design Certification and COL Applications Review. For review of a DC