IEEE 387-2017 pdf free.IEEE Standard for Criteria for Diesel Generator Units Applied as Standby Power Supplies for Nuclear Power Generating Stations.
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
acceptable: Demonstrated to be adequate by the safety analysis of the plant.
continuous rating (of diesel-generator unit): The electric power output capability that the diesel generator unit can maintain in the service environment for X76() Ii of operation per year with only scheduled outages for maintenance.
design basis event/accident: Postulated events used in the design to establish the performance requirements of the structures, systems. and components. A postulated event or accident that a nuclear facility shall be designed and built to withstand without loss to the systems, structures, and components necessaiy to improve public health and safety.
design load: That combination of electric loads (kW and kvar), having the most severe power demand characteristic, which is provided with electric energy from a diesel-generator unit for the operation of engineered safety features and other systems required during and following shutdown of the reactor. Design load may include the term power factor.
diesel-generator unit: An independent source of standby electrical power that consists of a diesel-fueled internal combustion engine (or engines) coupled directly to an electrical generator (or generators): the associated mechanical and electrical auxiliary systems: and the control, protection, and surveillance systems.
start demands: All valid and inadvertent starts, including all starts that are followed by load-runs, whether by automatic or manual initiation. Included is a stan-only situation where the emergency diesel generator is started, hut no attempt is made to load the emergency diesel generator. See the following exeptions:
start demand failures:
Any failure within the emergency diesel generator system that prevents the generator from achieving a specified frequency (or speed) and voltage within specified time allowance is classified as a valid start failure. For monthly surveillance tests, the emergency diesel generator can be brought to rated speed and voltage in the time recommended by the manufacturer to reduced stress and wear.
Any condition identified during maintenance inspections (with the emergency diesel generator in the standby mode) that would definitely have resulted in a start failure if a demand had occurred shall count as a valid start demand and failure.
load-run demands: To be valid, the load-run attempt shall follow a successful start and meet one of the following criteria (see the exceptions below):
a) A load-run of any duration that results from a real (i.e., not a test) automatic or manual signal.
b) A load-run test to saiisI’ the plant’s load and dLlration test specifications.
Exceptions: Unsuccessful attempts to start or load-run shall not count as valid demands or failure when they can definitely be attributed to any of the following:
a) Any operation of a tnp that would be bypassed in the emergency operating mode (e.g., high cooling- water temperature trip)
b) Malfunction of equipment that is not required to operate during the emergency operating mode (c.g., synchronizing circuitry)
c) Intentional termination of the test because of alarmed or observed abnormal conditions (e.g., small watcr or oil leaks) that would not havc ultimately resulted in Significant damage or failure of the emergency generator
d) Component malfunctions or operating errors that did not prevent the emergency diesel generator &om being restarted and brought to load within 5 mm (i.e., without corrective maintenance or significant problem diagnosis)
c) A failure to start because a portion of the starting system was disabled for test purposes. if followed by a successful start with the starting system in its normal alignment
I) Exploratory tests during corrective or preventive maintenance shall not count as demands or failures
engine equilibrium temperature: The condition at which the jacket waler and lube oil temperatures are both within ± 5.5 -C (10 F)of their normal operating temperatures established by the engine manufucturer.
equipment specification: The document identifying all technical and quality assurance requirements for purchasing equipment, material, and services. This would also include all requirements to meet the sakty analysis of the plant. This may also be called a purchasing specifIcation.
generator nameplate capacity: The maximum amount ofelectric energy that a generator can produce within specified conditions (e.g.. ambient temperature, elevation) as rated by the manufacturer. Generator nameplate capacity is usually expressed in kilovolt-amperes (kVA) and kilowatts (kW), as indicated on a nameplate that is physically attached to the generator.
load profile: The magnitude and duration of loads (kW and kvar) applied in a prescribed time scquencc. including the transient and steady-state characteristics of the individual loads. (See Annex A).IEEE 387 pdf download.