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:
should be designed so that a single failure will not result in loss of the capability of the handling system to perform its safety functions. Overhead crane handling systems used for handling critical loads (following construction) such as loads dur- ing reactor refueling and spent fuel handling should be designed, fabricated, installed, inspected, tested, and operated in accordance with the following: 1. Performance Specification and Design Criteria a. Separate performance specifications that are required to develop design criteria should be pre- pared for a permanent crane that is to be used for con- struction prior to use for plant operation. The allowable design stress limits should be identical for both cases, and the sum total of simultaneously applied loads should not result in stress levels causing permanent deformation other than localized strain concentration in any part of the handling system. b. The operating environment, including max- imum and minimum pressure, temperature, humidity, and emergency corrosive or hazardous conditions, should be specified for the crane and lifting fixtures. (1) Closed box sections of the crane struc- ture should be vented to avoid collapse during contain- ment pressurization. Drainage should be provided to avoid standing water in the crane structure. (2) Minimum operating temperatures should be specified in order to reduce the possibility of brittle fracture of the ferritic load-carrying members of the crane. Materials for structural members essential to structural integrity should be impact tested unless ex- empted by the provisions of paragraph AM-218 of the ASME Code, Section VIII, Division 2. However, the "minimum design temperature" as used therein should be defined as 60'F below the minimum operating tem- perature. Either 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