CSA N287.7-17 In-service examination and testing requirements for concrete containment structures for nuclear power plants.
5 General requirements 5.1 General 5.1.1 Concrete containment structures and their parts, as applicable, shall be examined in accordance with the requirements of Clause 6. 5.1.2 Concrete containment structures shall be leakage-rate tested in accordance with the requirements of Clause 7. 5.1.3 Proof and leakage-rate tests shall be performed prior to returning the concrete containment structures to service in accordance with the requirements of CSA N287.6 after a) the completion of major modifications to the concrete containment structures or to parts of the containment structures that cannot be tested separately; and b) a major event that could negatively impact the integrity of the structure. Notes: 1) The containment structure is initially proof and leakage-rate tested in accordance with the requirements of CSA N287.6 prior to first being declared in-service. 2) A major modification is that which could impact the integrity of the structure. 3) Examples of major events include a) the containment system being subjected to elevated pressure differentials as a result of an accident; or b) the containment system being subjected to any severe environmental effects beyond its design basis. 5.2 Basis of comparison The observations of the in-service examinations and tests shall be compared to the monitored results of the pre-operational proof and leakage-rate tests and to the results of the preceding examinations and tests, and shall be made available to the AHJ for review. Trending of the test results shall be provided in the test report.
6 In-service examination requirements 6.1 General 6.1.1 Containment structures shall be examined in accordance with Clause 6. The examination shall be of sufficient frequency and physical extent to identify deterioration of the concrete containment structures. 6.1.2 The method, extent, and frequency of examinations shall be agreed upon by the operating organization and the AHJ, with consideration given to a) type and function of the structure; b) design and construction history of the structure; c) performance records, including those of prior examinations; d) design capacity of the reinforced or pre-stressed concrete structure; e) provisions for monitoring; f) availability of reliable equipment and instrumentation; and g) repair history, if any.
CSA N287.7 pdf download.