![]() The likelihood of core damage due to NuScale reactor equipment failures while at full power conditions is 1 event per module every ~3 Billion Years. NuScale’s simple design eliminates numerous systems and components whose failures contribute to core damage in conventional reactors. ![]() NuScale has worked hard to achieve a reactor design that reduces core damage frequency: The lower the CDF, the lower the chance that an accident will occur that would result in core damage and potential release of radioactivity. Core damage frequency (CDF) is a term used in probabilistic risk assessment to express the likelihood of an accident that would cause damage to a nuclear reactor core. Low Core Damage Frequency (CDF)Īccidents that cause damage to the nuclear core of a reactor are serious because they may result in damaged fuel or a core meltdown, which could result in large releases of radioactive materials. Why is the NuScale SMR safer? Our safety features make the difference. In December 2015, NuScale submitted a topical report to the NRC detailing its proposed methodology for NuScale VOYGR™ Plant licensees to determine the appropriate EPZ. NuScale Power worked with the Nuclear Energy Institute (NEI) to develop methodologies to support smaller EPZs for SMRs for discussion with the NRC. Also a smaller reactor core means less radioactive material that could be released in an accident. The EPZ is expected to be smaller since our safe design means there is less likelihood that something unexpected, such as severe accidents, would occur. Under an emergency, managing the EPZ becomes very important for the plant itself and the areas beyond the EPZ.Īs the NuScale SMR is so much smaller and safer than large nuclear reactors, rightsizing the EPZ is important. The population areas surrounding the plant.The geographical features where the plant is located. ![]() The operating characteristics of the plant.The exact size and shape of each EPZ is determined by careful consideration of the following factors: For both zones specific emergency procedures are in effect. The second, called the Ingestion Exposure Pathway, is about 50 miles in radius for conventional nuclear plants, to avoid or reduce the dose from potential ingestion of food contaminated by radioactive materials. The first, called a Plume Exposure Pathway, is traditionally at a 10 miles radius for conventional nuclear plants, and is designed to avoid or reduce the dose from potential exposure of radioactive materials from the plant. In practice there are two EPZs surrounding the plant site. The Emergency Planning Zone (EPZ) is the area surrounding the nuclear power plant within which special considerations and management practices are pre-planned and exercised in case of emergency. ![]() With creating the new generation of nuclear power comes the responsibility of ensuring safety for all humankind. ![]()
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