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:
REVIEW RESPONSIBILITIES Primary - Materials Engineering Branch (MTEB)and Chemical Engineering Branch (EMCB)1 Secondary - None I. AREAS OF REVIEW Although large steam turbines and their auxiliaries are not safety-related systems as defined by NRC regulations, certain failures that occur in these turbines can produce high-energy missiles that potentially threaten safety-related structures, systems, and components. Plant designs are 2 reviewed with the objective of establishing whether safety-related plant structures, systems, and components have adequate protection against the effects of potential turbine missiles. The primary review area is the evaluation of turbine missile generation, strike, and damage probabilities with respect to the safety-related missile targets probability. The review requires input from the Auxiliary Systems Branch (ASB) on target identification and from the Structural Engineering Branch (SEB) on barrier quality.3 MTEB reviews the turbine disc failure analysis, fracture toughness properties, turbine startup procedures, and inservice inspection as part of its primary review responsibility for SRP Section 10.2.3.4 DRAFT Rev. 3 - April 1996 3.5.1.3-2 Review Interfaces5 In addition, MTEB The EMCB will coordinate other branches' evaluations that interface with 6 the overall review of turbine missiles. These interfaces are as follows: 1. SEB The Civil Engineering and Geosciences Branch (ECGB), upon request, reviews 7 8 the turbine missile impact effects on steel and concrete barriers (e.g., penetration depth, 9 scabbing, and structural response) as part of its primary review responsibility for SRP Section 3.5.3. The ECGB also reviews the turbine rotor failure analysis, fracture toughness properties, turbine startup procedures, and inservice inspection as part of its primary review responsibility for SRP Section 10.2.3.10 2. Power Systems Branch (PSB) The Plant Systems Branch (SPLB) reviews the turbine 11 overspeed protection, including overspeed