Document: NRC Regulatory Guide
Document ID: c0dbb594-6262-4b83-96b1-366758ad9676
Document Type: regulatory_guide
Title: Interim Licensing policy on as low as Practicable for Gaseous Radiodine Releases from Light-Water-Cooled Nuclear Power Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1229/ML12298A137.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.42
CFR Part: 
CFR Title: 

Content:
tive iodine taken into the body of the child by ingestion of locally produced milk. Features of the five draft guides appended to the Concluding Statement of Position which are germane to guidance for radioactive iodine in gaseous effluents have been abstracted and presented as appendices of this interim guide. The calculational models with selected parametric values contained in the appendices to this guide are acceptable to the staff in evaluating LWR stations for compliance with §20.1(c) of 10 CFR Part 20 and §§50.34a and 50.36a of 10 CFR Part 50. C. REGULATORY POSITION The guidance presented below on radioactive iodine in gaseous effluents from light-water-cooled nuclear power reactors has been extracted from the Regulatory staff's Concluding Statement of Position.2' 1. Guidance on Design Objectives for Radioactive Iodine in Gaseous 3/ Effluents. For radioactive iodine above background- releases to the atmosphere in LWR gaseous effluents: a. The calculated annual total quantity of all radioactive iodine from all LWRs at a site should not result in an annual dose or dose commitment to the thyroid of an individual in an unrestricted area from all pathways of exposure in excess of 15 millirems. In determining the dose or dose commitment, the portion thereof due to intake of radiaoctive iodine via the food pathways may be evaluated at the locations where the food pathways actually exist. b. The calculated annual total quantity of iodine-131 in gaseous effluents should not exceed 1 curie for each LWR at a site. 3/"Background" means the quantity of radioactive materials in the effluent from LWRs at a site that did not originate in the reactors. 1.42-3 / c. Notwithstanding the guidance in C.i.a and C.l.b for a parti- cular site, if an applicant for a permit to construct an LWR has proposed baseline in-plant control measures-4/ to reduce the possible sources of radioactive iodine releases and the calculated annual quantities,taking into account such con- trol