Document: NUREG-0800
Document ID: 29fa664a-a42c-4ff0-8ae1-3798f7f23c23
Document Type: srp
Title: TURBINE MISSILES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070373.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.3
CFR Part: 
CFR Title: 

Content:
, and/or shielding by barriers is such that the total strike and damage probability for all such targets within the strike zones is less than 10-3 per turbine failure. Adequate protection will also be identified with targets which are redundant and sufficiently independent (e.g., by separation distance or barriers) such that a turbine failure could not compromise two or more members of a redundant train. The following specific information is necessary in order to perform the above review: a. Dimensioned plant layout drawings (plan and elevation views). b. Barriers (e.g., structural wall material strength properties, thicknesses). c. Identification of safety-related structures, systems, and components in terms of location, redundancy, and independence (Ref. 3). d. Identification of all turbine-generator units (present and future) in the vicinity of the plant being reviewed. e. A quantitative description of the turbine-generator in terms of rotor shaft, wheels, steam valve characteristics, rotational speed and turbine internals pertinent to turbine missiles analyses. Postulated missiles should be identified in terms of missile size, mass, shape, and exit speed for design overspeed and destructive overspeed turbine failures. A description should be provided of the analysis used in estimating the missile exit speeds. The sense of rotation should be identified with respect to each turbine-generator under consideration. Most of this information can be obtained from the applicant's SAR. The relevant Standard Format Sections are 1.2, 3.5, 3.8, and 10.2. 2. Plants which do not conform to the recommendations of Regulatory Guide 1.115 should be reviewed on a case-by-case basis for each safety-related target. The review centers around the evaluation of the individual probability components in the relation where P2ij ( j j,max ) ( max ) DRAFT Rev. 3 - April 1996 3.5.1.3-12 EQUATION DELETED P = Total probability for incurring damage which exceeds the criteria described in