Document: NRC Regulatory Guide
Document ID: ae72d1f2-aba4-4afd-bf00-6a4263c3f3e9
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:
hold the load. (3) Special lifting devices and load attachment points should meet the endorsed standard as described in Regulatory Position C.3. (4) Standard lifting devices (e.g., slings) and lifting hardware (e.g., shackles) should meet the selection criteria and use restrictions specified in Sections 5-1.2.1 and 5-2 of ASME Std. NML-1. c. In regard to Section 2-6.1(c)(3) of ASME Std. NML-1, the following clarifications apply to analyses of postulated load drops with the potential to damage multiple irradiated fuel assemblies: (1) The analysis of radiological consequences should conform with appropriate guidance from RG 1.183, “Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors” (Ref. 16). (2) The consequences of the postulated drop should not result in deformation or repositioning of the fuel pins that would preclude modeling of the fuel as a regular array for evaluation of nuclear reactivity. d. In regard to Section 2-6.2, “Movement of Loads over Irradiated Fuel,” of ASME Std. NML-1, the staff endorses the use of an enhanced reliability handling system for handling heavy loads directly over irradiated fuel that satisfies Regulatory Position C.1.b as the preferred means of ensuring safety functions would be accomplished, or, as a secondary option, use of engineering controls as described in Section 2-6.1(c)(3) of ASME Std. NML-1 and clarified by Regulatory Position C.1.c. DG - 1381, Page 12 of 16 Regulatory Position C.2 2. This RG endorses ASME Std. NOG-1-2020 criteria for a Type I crane in its entirety as acceptable guidance for a crane with multiple girders, a top running trolley, and a wire rope hoist used as part of an enhanced reliability handling system, subject to the following clarifications: a. A quality assurance program equivalent to the applicant’s or licensee’s quality assurance program should be applied to the design, fabrication, installation, and initial testing of the crane. The scope