Document: NUREG-0800
Document ID: dfb421c6-cf9c-447e-ab71-dd0426ce50e5
Document Type: srp
Title: TURBINE MISSILES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340523.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.3
CFR Part: 
CFR Title: 

Content:
re susceptible to potential missile damage, should have sufficient missile protection in terms of one or more of the following: missile barriers target redundancy; turbine disc integrity; or overspeed protection. The SRP Section 2.2.3 risk acceptance guidelines that are used for potential accident situations in the vicinity of the plant will also be used in determining the sufficiency of protection against turbine missiles. 3. The following criteria apply exclusively to plants for which an application for a construction permit was submitted prior to 11/15/76: 3.5.1.3-2' Rev 2 - July 1981 When the estimated turbine missile risks exceed the guidelines of SRP Section 2.2.3, the following requirements should be met: i. The design and on-line testing of the overspeed sensing and tripping system, including the main steam stop and control' valves, and reheat stop and intercept valves, should be in accordance with SRP Section 10.2, as determined by the PSB. For Operating License reviews a determination should be made of whether increased valve testing should be required, based on cost-benefit considerations. ii. The applicant should submit a detailed strike and damage analysis with respect to all vulnerable targets (with the aim of assessing the margin available) and/or provide local shielding (if the above analyses indicate that SRP Section 2.2.3 guidelines are still exceeded). The procedures used for describing missile interactions with structural barriers and barrier damage analysis should conform to those of SRP Section 3.5.3. The SEB will review the interaction aspects of turbine missiles with respect to structural barriers and their damage analysis. The MTEB reviewer will perform an overall risk assessment of turbine missile hazard based on an independent evaluation of the detailed strike and damage analyses. The MTEB will also review the adequacy of turbine disk integrity in accordance with SRP Section 10.2.3. III. REVIEW PROCEDURES The reviewer selects and