Energia i regulacje · 31.12.1996

Proposed Generic Communication; Degradation of Steam Generator Internals

The Nuclear Regulatory Commission (NRC) is proposing to issue a generic letter concerning the degradation of steam generator internals at foreign pressurized-water reactor facilities. The purpose of the proposed generic letter is to (1) re-alert addressees to the previously communicated findings of damage to steam generator internals, namely, tube support plates and tube bundle wrappers, at foreign PWR facilities; (2) emphasize to addressees the importance of performing comprehensive examinations of steam generator internals to ensure steam generator tube structural integrity is maintained in accordance with the requirements of Appendix B to 10 CFR Part 50; and (3) request all addressees to submit information that will enable the NRC staff to verify whether or not the condition of addressees' steam generator internals comply and conform with the current licensing basis for their respective facilities. The NRC is seeking comment from interested parties regarding both the technical and regulatory aspects of the proposed generic letter presented under the SUPPLEMENTARY INFORMATION heading. The proposed generic letter was endorsed by the Committee to Review Generic Requirements (CRGR)