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:
are provided in the control room. 7. The in-containment high-range radiation monitors meet the criteria of Section II.F.1 of NUREG-0118 and 0737. 8. Emergency power is initiated after loss of offsite power. b. The airborne radioactivity monitoring system will be acceptable if it meets the following criteria: 1. Air should be sampled at normally occupied locations where airborne radioactivity may exist, such as solid waste handling areas, spent fuel pools, reactor operating floors, and BWR turbine buildings. The monitoring system should be capable of detecting ten MPC-hours of particulate and iodine radioactivity from any compartment which has a possibility of containing airborne radioactivity and which normally may be occupied by personnel, taking into account dilution in the ventilation system. Continuous monitoring of air being exhausted from locations within the facility during normal operation is an acceptable method. Noble gas monitors should be calibrated such that, when monitoring for 133Xe, the instrument response will determine concentrations accurately. 2. Representative air concentrations are measured at the detectors, which are located as close to the sampler intakes as possible. 3. Ventilation monitors are upstream of HEPA filters. 4. The detectors are calibrated routinely and after any maintenance work is performed on the detector. 5. Each location has a local audible alarm and variable alarm set points. Monitors located in high noise areas should also have visual alarms. 6. Readout and annunciation are provided in the control room. 7. Emergency power is initiated after loss of offsite power. | 12. 3-10 Rev. 2 - July 1981 c. The in-plant accident radiation monitoring systems will be acceptable if they meet the following criteria: 1. Personnel have the capability to assess the radiation hazard in areas which may be accessed during the course of an accident, in accordance with the criteria of Item II.F.1 of NUREG-0718 and 0737, and Regulatory Guide