Nuclear reactor melt arrest and coolability device

摘要

Example embodiments provide a Basemat-Internal Melt Arrest and Coolability device (BiMAC) that offers improved spatial and mechanical characteristics for use in damage prevention and risk mitigation in accident scenarios. Example embodiments may include a BiMAC having an inclination of less than 10-degrees from the basemat floor and/or coolant channels of less than 4 inches in diameter, while maintaining minimum safety margins required by the Nuclear Regulatory Commission.

主权项

1. A Basemat-Internal Melt Arrest and Coolability device (BiMAC), comprising:
a distributor configured to receive a coolant; and a plurality of adjacent coolant channels connected to the distributor at a first end of the channels and configured to receive the coolant from the distributor, each of the channels having an inclination equal to or greater than about 5 degrees and less than 10 degrees with respect to horizontal, each of the channels having a second end with a vertical portion, the second end being open and configured to permit the coolant to exit, the BiMAC configured to absorb a thermal load of at least 100 kW/m2 from molten debris relocated on top of the BiMAC for at least 24 hours, wherein each of the coolant channels are configured to not completely void a liquid coolant flowing through the coolant channel during the 24 hours.