Document: NRC Regulatory Guide
Document ID: f92b5e1e-0bb1-4850-acb7-d4534cc77577
Document Type: regulatory_guide
Title: Wide-Range Spent Fuel Pool Level Instrumentation + HISTORY - HISTORY 11/2015 – DG-1317 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1424/ML14245A454.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.227
CFR Part: 
CFR Title: 

Content:
n is not required to respond to, an information collection request or requirement unless the requesting document displays a currently valid OMB control number. B. DISCUSSION Reason for Issuance One of the lessons learned from the events at Fukushima Dai-ichi was the significance of the challenge presented by a loss of safety-related systems following the occurrence of a beyond-design-basis external event. In the case of Fukushima Dai-ichi, operators were distracted due to concerns associated with spent fuel pool cooling and potential loss of pool integrity, and this distraction adversely impacted mitigation efforts. The wide-range spent fuel pool level instrumentation required by Order EA-12-051 is intended to avoid such distraction and enable effective prioritization of event mitigation resources and recovery actions. As one method of addressing these challenges, this RG endorses the processes in the NEI 12-02, Revision 1 as acceptable for use by licensees to provide enhancements in the form of wide-range spent fuel pool level instrumentation for beyond-design-basis events. Background Following the March 11, 2011 events at the Fukushima Dai-ichi nuclear power plant, the NRC established a senior-level agency task force referred to as the Near-Term Task Force (NTTF). The NTTF undertook a systematic and methodical review of the NRC regulations and processes to determine if the agency should make additional improvements to these programs in light of the events at Fukushima Dai- ichi. As a result of this review, the NTTF developed a comprehensive set of recommendations, documented in SECY-11-0093, “Near-Term Report and Recommendations for Agency Actions Following the Events in Japan,” dated July 12, 2011 (Ref. 10). The Commission then directed the NRC staff in staff requirements memorandum (SRM) for SECY-11-0093 to identify any actions that could, and in the staff’s judgment should, be taken in the near term given consideration to the wide range of tools