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:
tion 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 emphasizes aspects of the areas covered by this SRP section as may be appropriate for a particular case. The judgment on areas to be given attention and emphasis in the review is based'on an inspection of the material presented to see whether it is similar to that recently reviewed on other plants and whether items of special safety significance are involved. Upon request from the primary reviewer, the secondary review branches will provide input for the areas of review stated in subsection I of this SRP section. The primary reviewer obtains and uses such input as required to assure that this review procedure is complete. The review procedure involves the following: 1. The plant layout drawings are reviewed to determine the relative placement of safety-related structures, systems, and components with respect to the turbine-generator unit(s). This review is focused on determining if the plant layout conforms to the turbine placement and orientation recommenda- tions outlined in Regulatory Guide 1.115. If the orientation is such that all safety-related targets are excluded from the low trajectory turbine missiles, further review in this regard is not necessary. This procedure also encompasses the possibility of having some safety-related targets within the strike zones when their placement is .unavoidable. However, these systems must be protected against the effects of turbine missiles generated at design overspeed and. destructive overspeed. As * indicated in the Regulatory Guide 1.115,.this conditioh is met if the size, placement, and/or shielding by barriers is such that the total strike and damage probability for all such targets within the strike 3.5.1.3-3- Rev 2 -. July 1981 zones is less than 10-4 per turbine failure. Adequate protection will also be identified