Document: NUREG-0800
Document ID: 9a56a69d-7ff5-45af-9d63-dbefa3dea083
Document Type: srp
Title: TURBINE GENERATOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070575.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.2
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Content:
REVIEW RESPONSIBILITIES Primary - Power Systems Branch (PSB) Plant Systems Branch (SPLB)1 Secondary - None I. AREAS OF REVIEW Nuclear reactor plants include a turbine generator system (TGS) to convert the energy in steam from the nuclear steam supply system into electrical energy. The TGS consists essentially of the turbine unit and the automatic devices, alarms, and trips which control and regulate turbine action, and the generator unit and its controls. The turbine control system, the steam inlet stop and control valves, the low pressure turbine steam intercept and inlet control valves, and the extraction steam control valves, control the speed of the turbine under normal and abnormal conditions, and are thus related to the overall safe operation of the plant. The turbine generator system installed in a nuclear plant is typically equipped with redundant overspeed protection instrumentation and controls. The main steam and reheat steam control and stop valving arrangements typically provide redundancy in the valves essential for overspeed protection. The intent of the review under this Standard Review Plan (SRP) section is to verify 2 that such redundancy, in conjunction with inservice inspection and testing of the essential valves, makes a turbine overspeed condition above the design overspeed very unlikely and to assure ensure conformance with General Design Criterion 4. Assessment of the risk to essential plant 3 systems and structures from potential turbine missiles is reviewed under SRP Section 3.5.1.3. DRAFT Rev. 3 - April 1996 10.2-2 1. The PSB SPLB reviews the turbine generator system and the components and 4 subsystems normally provided with this equipment with respect to the following considerations: a. The general arrangement of the turbine and associated equipment with respect to safety-related structures and systems and balance of plant. b. The types and locations of main steam stop and control valves, reheat stop and intercept valves, and associated