Document: NRC Regulatory Guide
Document ID: 626cd346-6298-4966-a92d-c5d4b24bbc2b
Document Type: regulatory_guide
Title: Overhead Crane Handling Systems for Nuclear Power Plants
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1303/ML13038A096.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.104
CFR Part: 
CFR Title: 

Content:
r drop weight test per ASTM E-208 or Charpy tests per ASTM A-370 may be used for impact testing. The minimum drop weight test requirement should be nil-ductility transition temperature (NDTT) not less than 60'F below the minimum operating tem- perature. Minimum Charpy V-notch impact test require- ments should be those given in Table AM 211.1 of the ASME Code. Section VIII, Division 2, which should be met at a temperature 60°F below the minimum operat- ing temperature. Alternative methods of fracture anal- ysis that achieve an equivalent margin of safety against fracture may be used if they include toughness measure- ments on each heat of steel used in structural members 1.104-4 essential to structural integrity. In addition, tfle tracture analysis that provides the basis for setting minimum operating temperatures should include consideration of stress levels; quality control; the mechanical checking, testing, and preventive maintenance program; and the temperatures at which the design rated load test is run relative to operating temperature. (3) As an alternative to the recommenda- tions of regulatory position C. 1 .b.2, the crane and lifting fixtures may be subjected to a cold proof test as des- cribed in regulatory position C.4.d. (4) Cranes and lifting fixtures made of low-alloy steel such as ASTM A514 should be subjected to the cold proof test described in regulatory position C.4.d. c. The crane should be classified as Seismic Category I and should be capable of retaining the max- imum design load during a safe shutdown earthquake (SSE), although the crane may not be operable after the seismic event. The bridge and trolley should be provided with means for preventing them from leaving their run- ways with or without the design load during operation or under any seismic excursions. The design rated load plus operational and seismically induced pendulum and swinging load effects on the crane should be considered in the design of the trolley, andthey should be