Document: NRC Regulatory Guide
Document ID: 1ff1e9f9-6081-422a-b088-bc699514103c
Document Type: regulatory_guide
Title: Control of Heavy Loads at Nuclear Facilities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2100/ML21006A335.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.244
CFR Part: 
CFR Title: 

Content:
expanded to address the variety of load handling systems that may be used for safety-significant load handling evolutions. These guidelines provide an acceptable means of defining plans for conduct of normal heavy load handling activities consistent with applicable regulations. The guidelines of ASME Std. NML-1 also establish criteria for protection of safety functions during nuclear safety critical lifts. These criteria include control of load motion by design and interlocks, enhanced safety handling systems, and engineering controls that include analysis of a postulated load drop. The enhanced safety handling system includes a crane designed as single failure proof, such as an overhead crane designed to meet the Type I criteria of ASME Std. NOG-1, and lifting devices, which may include special lifting devices designed to ASME Std. BTH-1 for recurrent lifts. The acceptance criteria for load drop analyses remain the same as those in the NUREG-0612 guidelines in all material aspects. The ASME Std. NML-1 guidelines for establishment of an enhanced safety handling systems using an overhead crane designed to meet the Type I criteria of ASME Std. NOG-1 in its entirety constitute an complete, acceptable method of evaluation to demonstrate that safety functions would be accomplished with appropriate consideration of the effects of natural phenomena or credible equipment failures. The ASME Std. NML-1 guidelines for enhanced safety handling systems using cranes of other designs, controlled ranges of motion, or to establish engineering controls derived from analysis of postulated load drops provide an acceptable approach to develop a method of evaluation demonstrating that safety functions would be accomplished. The NRC staff defined criteria for cranes used as part of a highly reliable handling system in NUREG-0554. This NUREG provides technical guidance for the design, fabrication, installation, and testing of overhead cranes with the ability to withstand credible component