Provides recommendations and guidance for effective maintenance, surveillance and in-service inspection to ensure that the levels of reliability and availability of all plant structures, systems and components meet the assumptions and intent of the design.

Written for use by operating organizations of nuclear power plants and regulatory bodies, this Safety Guide provides specific recommendations on maintenance, testing, surveillance and inspection to ensure that the levels of reliability and availability of all structures, systems and components important to safety remain in accordance with the assumptions and intent of the design, and also that the safety of the plant is not adversely affected after the commencement of operation. The publication covers the establishment and implementation of preventive and corrective maintenance programmes; testing surveillance and inspection; the repair of defective plant equipment; the provision of related facilities and equipment; procurement; and generating and retaining records of maintenance activities.

This Safety Guide provides recommendations and guidance for effective maintenance, surveillance and in-service inspection to ensure that the levels of reliability and availability of all plant structures, systems and components meet the assumptions and intent of the design. It supplements Section 6 of Safety Standards Series No. NS-R-2, Safety of Nuclear Power Plants: Operation.

This guide outlines provisions for the preparation of in-service inspection programmes for critical systems and components of primary reactor coolant systems. Recommendations cover methods and techniques applicable to in-service inspection and the minimum frequency of examinations and tests. Methods of evaluating the results are described and acceptance standards defined. Methods of preparing the necessary documentation, procedures and records are recommended.