Document: NRC Regulatory Guide
Document ID: d812c779-c17b-4eb3-9d66-b532cd68bd03
Document Type: regulatory_guide
Title: Decommissioning Planning During Operations + HISTORY - HISTORY 12/2011 – DG-4014 , Proposed New Guide
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1115/ML111590642.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.22
CFR Part: 
CFR Title: 

Content:
lude areas of potential contamination not previously identified. The revised plans should also contain provisions for altering the frequency of surveillance in response to contamination events and the “conclusion” of those events. Surveillance plans are identified in the license, so licensees should discuss changes with the NRC and, if the plans to be changed are specified in the license, obtain prior NRC approval. Appendix A-1 to DG-4014, Page A-1-6 Discussion of Fig 3b. What else does the DPR require? Once a licensee has an approved plan(s) for monitoring and surveillance, whether changed or not as a result of review, it should conduct the activities specified in the plan(s). So long as there are no readings above the limits specified in the plans, the DPR does not require any additional actions. Licensee should continue to implement the existing plans routinely. If the results of the sampling are above the specified limits, the licensee should respond according to the site health and safety plan. This response should include defining the extent of contamination, identifying and implementing corrective actions to mitigate the event (locate and stop the leak or spill), and remediating the area to meet occupational requirements. Once it completes those actions, the licensee should conduct additional periodic monitoring for a time to ensure that the “fix” is effective. Another important part of the DPR is the requirement in 10 CFR 20.1501(b) that licensees record the results of surveys identifying significant subsurface residual radioactivity—requiring remediation to meet unrestricted use criteria—in records important to decommissioning. This will assist in planning and costing remedial actions and surveys to support license termination. It also provides important input to the historical site assessment required by the decommissioning section of the NRC’s licensing regulations. Once this information is collected, licensees should use it in revising