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Energia i regulacje · 19.06.2020

Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Rod Drop Accidents

The U.S. Nuclear Regulatory Commission (NRC) is issuing regulatory guide (RG) 1.236, "Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Rod Drop Accidents." This is a new RG that provides guidance for analyzing control rod accidents. It defines fuel cladding failure thresholds for ductile failure, brittle failure, and pellet-clad mechanical interaction. It also describes analytical limits and guidance for demonstrating compliance with regulations governing reactivity limits. RG 1.236 supersedes the guidance for control rod ejection accidents in RG 1.77, "Assumptions Used for Evaluation a Control Rod Ejection Accident for Pressurized Water Reactors," which is being withdrawn in conjunction with the issuance of RG 1.236.

Source: Federal Register — Nuclear Regulatory CommissionOpen original release →