NRC Recommendation and KEPCO’s Improvements
The U.S. based Nuclear Regulatory Committee (NRC) published results of the review which was conducted for 90 days and 12 subsequent recommendations as part of follow-up efforts after the Fukushima nuclear accident.
Establishment of Regulations
NRC Recommendation | KEPCO’s Improvements |
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The Task Force recommends establishing a logical, systematic, and coherent regulatory framework for adequate protection that appropriately balances defense-in-depth and risk considerations. |
Improvements following regulations |
Protective Measures
NRC Recommendation | KEPCO’s Improvements |
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The Task Force recommends that the NRC require licensees to reevaluate and upgrade as necessary the design-basis seismic and flooding protection of Safe Shutdown Conditions (SSC)s for each operating reactor. |
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The Task Force recommends, as part of the longer term review, that the NRC evaluate potential enhancements to the capability to prevent or mitigate seismically induced fires and floods. |
Improvement of Neutralizing Measures
NRC Recommendation | KEPCO’s Improvements |
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The Task Force recommends that the NRC strengthen Station Black Out (SBO) mitigation capability at all operating and new reactors for design-basis and beyond-design-basis external events. |
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The Task Force recommends requiring reliable hardened vent designs in BWR facilities with Mark Ⅰ and Mark II containments. |
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The Task Force recommends, as part of the longer term review, that the NRC identify insights about hydrogen control and mitigation inside containment or in other buildings as additional information is revealed through further study of the Fukushima Dai-ichi accident. |
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The Task Force recommends enhancing spent fuel pool makeup capability and instrumentation for the spent fuel pool. |
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The Task Force recommends strengthening and integrating onsite emergency response capabilities such as Emergency Operation Procedures (EOP)s, Severe Accident Management Guidelines (SAMG)s and Extensive Damage Mitigation Guidelines (EDMG)s. |
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Improvements of Capability to Deal with Emergencies
NRC Recommendation | KEPCO’s Improvements |
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The Task Force recommends that the NRC require that facility emergency plans address prolonged SBO and multiunit events. |
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The Task Force recommends, as part of the longer term review, that the NRC should pursue additional Emergency Power (EP) topics related to multiunit events and prolonged SBO. |
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The Task Force recommends, as part of the longer term review, that the NRC should pursue EP topics related to decisionmaking, radiation monitoring, and public education. |
Improvement of NRC Efficiency
NRC Recommendation | KEPCO’s Improvements |
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The Task Force recommends that the NRC strengthen regulatory oversight of licensee safety performance (i.e. the Reactor Oversight Process (ROP)) by focusing more attention on defense-in-depth requirements consistent with the recommended defense-in-depth framework. |
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