Nuclear Regulatory Commission May 7, 2015 – Federal Register Recent Federal Regulation Documents

The U.S. Nuclear Regulatory Commission (NRC) is issuing its Japan Lessons-Learned Division Interim Staff Guidance (JLD-ISG), JLD- ISG-2015-01, ``Compliance with Phase 2 of Order EA-13-109, Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions.'' This ISG provides guidance and clarifies the Phase 2 requirements in the order to assist the licensees that have Boiling Water Reactors (BWRs) with Mark I and Mark II Containments in the design and implementation of either a vent path from the containment drywell or a strategy that makes it unlikely that venting would be needed from the drywell before alternate reliable containment heat removal and pressure control is reestablished. This ISG also endorses, with clarifications, the industry guidance contained in Nuclear Energy Institute (NEI) 13-02, ``Industry Guidance for Compliance with Order EA-13-109,'' Revision 1.