Document: NUREG-0800
Document ID: 0c942a2c-afa6-4bbd-8f3f-4eede9dc146e
Document Type: srp
Title: - 12.4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350048.pdf
Revision Date: 2023-06
Chapter: 12
Section ID: 12.3
CFR Part: 
CFR Title: 

Content:
des 8.8 and 8.10 and are acceptable. The general shield design methodology and source term inventories used for (plant name) are similar to those from operating reactors. The basic radiation transport analysis used for the applicants' shield design is based on (list appropriate shielding computer codes used). The applicant also used shielding information from operating nuclear plants as input data for the shield design calculations. All concrete shielding in the plant will be constructed in general compliance with Regulatory Guide 1.69. We find the shielding design and methodology presented in the (Preliminary or Final) Safety Analysis Report acceptable based on the criteria of the Standard Review Plan. The ventilation system at (plant name) will be designed to ensure that plant personnel are not inadvertently exposed to airborne contaminants exceeding those given in 10 CFR Part 20. The applicant intends to maintain personnel exposures as low as is reasonably achievable by: 1) maintaining air flow from areas of potentially low airborne contamination to areas of higher potential concentrations; 2) ensuring negative or positive pressures to prevent exfil- tration or infiltration of potential contaminants; and 3) locating ventilation system intakes so that intake of potentially contaminated air from other building exhaust points is minimized. These design criteria are in accordance with the guidelines of Regulatory Guides 1.52 and 8.8. (List examples of exposure reduction features in the ventilation system.) The applicant's area radiation monitoring system is designed to: (1) monitor the radiation levels in areas where radiation levels could become significant, and where personnel may be present; (2) alarm when the radiation levels exceed preset levels to warn of increased radiation levels; and (3) provide a continuous record of radiation levels at key locations throughout the plant. In order to meet these objectives, the applicant plans to use (number) area monitors