Document: NUREG-0800
Document ID: bfe08773-10ce-45c6-9767-3cbe51c1726f
Document Type: srp
Title: - 12.4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070720019.pdf
Revision Date: 2023-06
Chapter: 12
Section ID: 12.3
CFR Part: 
CFR Title: 

Content:
xposed to airborne contaminants in excess of the limits provided in 10 CFR Part 20. The applicant intends to maintain personnel exposures ALARA by (1) maintaining airflow from areas of potentially low airborne contamination to areas of higher potential concentrations, (2) ensuring negative or positive pressures to prevent exfiltration or infiltration of potential contaminants, and (3) locating ventilation system intakes so as to minimize intake of potentially contaminated air from other building exhaust points. 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. To meet these objectives, the applicant plans to use [number] area monitors located in areas where personnel may be present and where radiation levels could become significant. The area radiation monitoring system meets the criteria of 10 CFR 50.34(f)(2)(xvii), item II.F.1(3) of NUREG-0737, and Regulatory Guide 1.97, Revision 3, and is equipped with local and remote audio and visual alarms and a facility for central recording. [List examples of other area monitoring system features.] The design objectives of the applicants’ airborne radioactivity monitoring system are (1) to assist in maintaining occupational exposure to airborne contaminants ALARA, (2) to check on the integrity of systems containing radioactivity, and (3) to warn of unexpected release of airborne radioactivity to prevent inadvertent exposure of personnel. The applicant will install airborne radioactivity monitors in work areas where there is a