Resolution of Generic Safety Issues: Item B-30: Design Basis Floods and Probability (Rev. 1) ( NUREG-0933, Main Report with Supplements 1–35 )

DESCRIPTION

This NUREG-0471³ task involved the preparation of a paper detailing the bases for design basis flood events utilized by the staff in case reviews, including probable maximum floods, hurricanes, tsunamis, seiches, seismically-induced dam failures, and combinations of lesser events. Additionally, descriptions of probability estimates, including potential errors, would be prepared for the principal flood-producing events. This material was being prepared to respond to a request of the ACRS to provide them with a better understanding of the staff's approach to design basis floods.

CONCLUSION

This item is a Licensing Issue. As a part of the improvements to NUREG-0933, the NRC staff clarified in SECY-11-0101, "Summary of Activities Related to Generic Issues Program," dated July 26, 2011,¹⁹⁶⁷ that the Generic Issues Program will not pursue any further actions toward resolution of licensing and regulatory impact issues. Because licensing and regulatory impact issues are not safety issues by the classification guidance in the legacy Generic Issues Program, these issues do not meet at least one of the Generic Issues Program screening criteria and do not warrant further processing in accordance with Management Directive 6.4, "Generic Issues Program," dated November 17, 2009.¹⁸⁵⁸ Therefore, this issue will not be pursued any further in the Generic Issues Program.

REFERENCES

0003. NUREG-0471, "Generic Task Problem Descriptions (Categories B, C, and D)," U.S. Nuclear Regulatory Commission, June 1978. 1858. Management Directive 6.4, "Generic Issues Program," U.S. Nuclear Regulatory Commission, November 17, 2009. 1967. SECY-11-0101, "Summary of Activities Related to Generic Issues Program," July 26, 2011. [ML111590814]