scope:

This Standard describes the requirements and guidelines for qualifying active mechanical equipment used in nuclear power plants. The requirements and guidelines presented include the principles, procedures, and methods of qualification. Requirements are specifically denoted throughout this Standard and are generally recognized by the accompanying word shall, while guidelines are accompanied by the word should.

This Standard does not apply to electric components such as motors, electric valve actuators, instrumentation, and control devices which are qualified by conformance with appropriate IEEE standards. It should be recognized that some qualification aspects are performed when the mechanical/eIectrical component interface is addressed; e.g., Section QV provides qualification guidance for valve assemblies using electric actuators and Section QP provides qualification guidance for pump assemblies using electric motor drivers that have been previously qualified per the appropriate IEEE standards.

Qualification of active mechanical equipment in accordance with this Standard is the responsibility of the Owner or the Owner's designee. It is also the responsibility of the Owner or the Owner's designee to define specifically any other equipment to which this Standard will be applied. The Owner or the Owner's designee is further responsible for program( s) and associated documentation required to assure continuation of initial qualification of active mechanical equipment which is outside the scope of this Standard.

Qualification of mechanical equipment in accordance with this Standard requires utilization of two sections and applicable appendices as a minimum; e.g., Section QR must be used jointly with other sections of the Standard.

PURPOSE

The purpose of this Standard is to provide basic principles and guidance to demonstrate the qualification of active mechanical equipment used in nuclear power plants. Qualification is intended to confirm the adequacy of the equipment to function over the expected range of service conditions, including design basis event and post-design basis event conditions, as well as in-service inspection and test conditions. Qualification is not intended to confirm adequacy of the equipment to function beyond its specified service conditions even though qualification margins should assure additional capability.