Document: NRC Regulatory Guide
Document ID: c9b91798-6746-44f2-b0e6-f36a9de10265
Document Type: regulatory_guide
Title: Radiological Environmental Monitoring for Nuclear Power Plants + HISTORY - HISTORY 02/2025 – Periodic Review of Revision 2 – Issues identified for future consideration 11/2014 – Periodic Review of Revision 2 – Issues identified for future consideration Prior to the 2009 revision, RG 4.1 was entitled, "Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants" (Rev. 2)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML2504/ML25043A394.pdf
Revision Date: 2025-03
Chapter: 
Section ID: RG-4.1
CFR Part: 
CFR Title: 

Content:
(e.g., for agricultural purposes) to permit modifications in monitoring programs for evaluating doses to individuals from principal pathways of exposure. An issue has been raised about monitoring the environmental impacts of use of potassium hydroxide (KOH) in lieu of lithium hydroxide in reactor coolant for chemistry control. This issue has been raised by the Regional Health Physics inspectors. However, RG 4.1 itself does not discuss the specifics of monitoring individual radionuclides. Therefore, this issue is outside the scope of RG 4.1. RG 4.1 Revision 2 was also reviewed in 2014 (ADAMS Accession No. ML14268A548), and the staff had determined there were issues identified for future consideration. These other issues to be addressed in the future are minor editorial ones in Section A, Introduction, and Section D, Implementation, to bring the RG into conformance with the current RG format. These formatting issues are minor and do not in themselves warrant revision of the RG at this time. 2. What is the impact on internal and external stakeholders of not updating the RG for the known issues, in terms of anticipated numbers of licensing and inspection activities over the next several years? For licensing activities, new license applications are anticipated in the near future. However, existing guidance is RG 4.1, Rev. 2 is sufficient. Thus, there is no immediate need for revising the guide at this time to address their licensing. For inspection activities, an issue has been raised about monitoring the environmental impacts of use of potassium hydroxide (KOH) in lieu of lithium hydroxide in reactor coolant for chemistry control. This issue has been raised by the Regional Health Physics inspectors. However, RG 4.1 itself does not discuss the specifics of monitoring individual radionuclides. This issue is being reviewed by staff and will likely be addressed by other means, if necessary. 3. What is an estimate of the level of effort needed to address identified issues