U.S. NUCLEAR REGULATORY COMMISSION May 2006
Revision 1
REGULATORY GUIDE
OFFICE OF NUCLEAR REGULATORY RESEARCH
REGULATORY GUIDE 1.201
(For Trial Use)
(Previously issued for trial use, January 2006)
GUIDELINES FOR CATEGORIZING
STRUCTURES, SYSTEMS, AND COMPONENTS
IN NUCLEAR POWER PLANTS
ACCORDING TO THEIR SAFETY SIGNIFICANCE
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