Document: NRC Regulatory Guide
Document ID: b2dd9fac-b26b-4819-a1b3-6e1765b4cfa3
Document Type: regulatory_guide
Title: Constraint on Releases of Airborne Radioactive Materials to the Environment for Licensees other than Power Reactors + HISTORY - HISTORY 04/2017 – Periodic Review of Revision 1 – Issues identified for future consideration 04/2010 – DG-4018 , Proposed Revision 1 12/1995 – Draft DG-8016
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1720/ML17208A922.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.20
CFR Part: 
CFR Title: 

Content:
E. 4. Based on the answers to the questions above, what is the NRC staff action for this guide (Reviewed with no issues identified, Reviewed with issues identified for future consideration, Revise, or Withdraw)? Reviewed with issues identified for future consideration. 5. Provide a conceptual plan and timeframe to address the issues identified during the review. The NRC staff will consider the identified issues as part of the next periodic review. 6 Regulatory Guide Number: 3.64, Revision 0 Title: Calculation of Radon Flux Attenuation by Earthen Uranium Mill Tailings Covers Office/division/branch: NMSS/DUWP/URLB Technical Lead: Ronald A. Burrows Staff Action Decided: Reviewed with issues identified for future consideration 1. What are the known technical or regulatory issues with the current version of the Regulatory Guide (RG)? RG 3.64 was issued in 1989 to describe methods acceptable to the NRC staff for calculating radon fluxes through earthen covers and for calculating the resulting minimum cover thickness needed to meet NRC and the Environmental Protection Agency (EPA) standards. The technical content of RG 3.64 is satisfactory. However, Appendix B, “The Radon Program,” to RG 3.64 describes the radon computer program which is outdated and not available to the NRC staff and the public. The guide also lists an outdated standard by the American Society for Testing and Materials, (ASTM)-D-698-78, 1978 "Standard Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 5.5 lb (2.49 kg) Rammer and 12 in. (305 mm) Drop.” The most recent version of the standards is ASTM D698, 2012 (active) “Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft3 (600 kN-m/m3)).” The staff has not compared these two standards to determine if there are significant updates. 2. What is the impact on internal and external stakeholders of not updating the RG for the known issues, in terms of