Electric Power Research Institute EPRI

Most flow measurements occur under_______ flow conditions correct answer: Turbulent Full compensation of remote reading thermometer would typically be a provided by a: correct answer: Secondary capillary An increase in the viscosity of a liquid will result in a _______ Reynolds number correct answer: Lower In most process control systems the process measurement is derived by a: correct answer: Sensor When using a voltmeter without reference junction compensation to measure the ou...

Why is civil engineering important in power plants? correct answer: Their main function is to maintain structural integrity of structures, systems, and components. Describe the design criteria and requirements for sites correct answer: - Soil structure interaction - Soil stability - Excavation Describe operating experience with external flooding, including causes, consequences, and preventive measures for sites correct answer: - Fukushima, Japan: An earthquake and subsequent tsunami ...

Identify ways a core can fail correct answer: The primary cause of core failure is an inability to fully remove the heat created by the fuel due to the following: 1. A failure of the heat removal systems 2. An increase of heat created beyond the ability of the heat removal systems 3. The inability to transfer heat from the fuel What cooling capabilities could lead to core melt and a loss of core geometry correct answer: Loss of Cooling Capabilities • Loss of reactor coolant flow ...

ACCELERATING POWER correct answer: In a GENERATOR, the difference between the MECHANICAL INPUT POWER and the electrical outputPOWER (assuming no LOSSES). For a GENERATOR's TORQUE ANGLE to change, the GENERATORmust have accelerating POWER. ACCUMULATED INADVERTENT correct answer: The accumulation over time of INADVERTENT ENERGY. The accumulated inadvertent account of aBALANCING AUTHORITY represents the amount of excess ENERGY a BALANCING AUTHORITY haseither supplied to the INTERCONNECTION or...

Fission correct answer: A neutron interaction in which a nucleus absorbs a neutron, splits into two new nuclei and releases a large amount of energy; the resulting fission fragments emit neutrons and gamma rays and then undergo radioactive decay Turbines correct answer: A device with rotating blades that are connected to a shaft and turned by having a fluid do work on the blades; in a nuclear power plant, steam turbines are rotated by expanding steam Describe how a nuclear power plant ge...

The temperature of a transmitter is 20-300 degrees F. The output signal is 3-15 psig. What would be the expected output signal for an input temperature of 175 degrees F? correct answer: 195/320=.609(16)+3=9.64 psig Most flow measurements occur under __________________ conditions. correct answer: turbulent Six cubic feet of a liquid is 400 pounds. the Specific Gravity of the liquid is... correct answer: 400/(62.430*6=374.58) = 1.068 Full compensation of a remote reading thermometer wo...

If a generator is producing 500MW and 200Mvar, the generator is: correct answer: Lagging 87 correct answer: Is the IEEE device number for a differential relay. Can a Synchronous machine have a negative torque angle? What doies this mean? correct answer: Yes, the machine is absorbing active power. A customer load is fed at 12o Volts. The customer's voltage is doubled while the load magnitude stays the same. What effect does this have on the power losses? correct answer: Decreases th...

What is the primary safety concern for nuclear power plant operations? correct answer: Preventing significant radiation exposure to the public during routine and accident conditions. How is the primary safety concern for nuclear power plant operations achieved? correct answer: Employing fission product barriers and engineered safety features. Identify ways a core can fail correct answer: Any loss of core geometry, particularly into a configuration where cooling becomes impractical, is c...

If a generator is producing 500 MW and 200 Mvar, is the generator? A. Leading B. Lagging C. Underexcited D. Dropping correct answer: B. Lagging What is the IEEE device number for a differential relay? A. 87 B. 86 C. 67 D. 50 correct answer: A. 87 Can a synchronous machine have a negative torque angle? What does this mean? A. Yes / the machine is absorbing reactive power B. No / the machine is absorbing active power C. No / the machine is absorbing reactive power D. Yes / the...

If a generator is producing 500 MW and 200 Mvar, is the generator? A. Leading B. Lagging C. Underexcited D. Dropping - B. Lagging What is the IEEE device number for a differential relay? A. 87 B. 86 C. 67 D. 50 - A. 87 Can a synchronous machine have a negative torque angle? What does this mean? A. Yes / the machine is absorbing reactive power B. No / the machine is absorbing active power C. No / the machine is absorbing reactive power D. Yes / the machine is absorbing active power...