Document: NRC Regulatory Guide
Document ID: 908489d1-a222-483d-b60e-5162228a4844
Document Type: regulatory_guide
Title: Application of the Single-Failure Criterion to Safety Systems + HISTORY - HISTORY 12/2016 – Periodic Review of Revision 2 – Issues identified for future consideration 10/2011 – Periodic Review of Revision 2 – No issues identified Prior to the issuance of Revision 1, RG 1.53 was entitled "Application of the Single-Failure Criterion to Nuclear Power Plant Protection Systems" 05/2002 – DG-1118 , Proposed Revision 1 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1634/ML16349A071.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.53
CFR Part: 
CFR Title: 

Content:
gulatory Guide 1.53 in a coordinated and consistent fashion with the IAP activities to prevent additional technical or regulatory issues. 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? There is no impact to not updating the RG to address the known issues. Industry has stated operating licensees do not intend to submit many licensing actions until greater regulatory certainty is obtained through IAP efforts to modernize the regulatory infrastructure. Furthermore, most new reactor licensing actions are near completion based on the current RG 1.53. As such, the staff expects activities involving the single-failure criterion to be minimal. Although changes to IEEE Std 379 from the 2000 to the 2014 edition include its discussion of CCFs, the remaining changes are largely administrative. Until IAP efforts address CCF policy, the current guidance provided by RG 1.53 is sufficient to address any licensing or inspection activities that may occur prior to the completion of a revision of RG 1.53. 3. What is an estimate of the level of effort (LOE) needed to address identified issues in terms of full-time equivalent (FTE) and contractor resources? No specific LOE is needed for a new RG 1.53 revision this fiscal year. Less than 0.1 FTE for 1 year, which will be conducted as part of IAP efforts. No contractor resources are required. 4. Based on the answers to the questions above, what is the 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. Staff will not begin to address the identified issues before the 3rd Quarter of 2017, and a draft revision of RG 1.53 would not be published