摘要:
A method for determining at least one threshold value of at least one operating parameter of a nuclear reactor is implemented by an electronic determination system and includes the steps of determining a first threshold value of a respective operating parameter for an operation of the reactor at a first power; and determining a second threshold value of said parameter for an operation of the reactor at a second power. The operation at the lower power of the first and second powers is an operation continued for a duration of at least 8 hours over a 24-hour sliding window. The method also includes determining a third threshold value of said parameter for an operation of the reactor at a third power between the first power and the second power.
摘要:
A method whereby signals that are output by replacement SPNDs are converted into equivalent signals that would have been detected by legacy SPNDs for input to the legacy software. The replacement SPNDs have a different geometry than the legacy SPNDs and also have a different neutron sensitivity than the legacy SPNDs. The replacement SPNDs are subjected to a neutron flux in a core of a reactor and responsively output a set of signals. The set of signals and the geometry of the replacement SPNDs are employed to create a characterization of the neutron flux in the form of a curve that represents flux as a function of location along the core of the reactor. The legacy geometry of the legacy SPNDs is then employed to find the values on the curve that correspond with the positions where the legacy SPNDs had been located to create inputs for the legacy software.
摘要:
A method regulates operating parameters comprising at least the mean temperature of the core (Tm), and the axial power (AO) imbalance.The method includes development of a vector (Us) of control values of the nuclear reactor by a supervisor (31) implementing a predictive control algorithm; development of a vector (uK) of corrective values of the nuclear reactor controls by a regulator (33) implementing a sequenced gain control algorithm; development of a vector (U) of corrected values of the commands of the nuclear reactor, by using the vector (US) of the values of the commands produced by the supervisor (31) and the vector (UK) of the corrective values of the commands produced by the regulator (33); and regulation of the operating parameters of the nuclear reactor, by controlling actuators using the vector (U) of the corrected values of the controls.
摘要:
Disclosed herein is a method of synthesizing nuclear reactor power distribution using an optimized nonlinear basis function by means of combining signals of neutron detectors provided inside or outside a nuclear reactor. The method includes searching an optimized basis function combination, without determining previously a shape of a basis function, in such a way that error occurrence is minimized, and determining a shape of a synthesis function. When searching the optimized basis function combination and determining the shape of the synthesis function, the following equation is used. FZ ( Z i ) = a 0 + ∑ i = 1 n a i φ i + ∑ i = 1 n ∑ j = 1 n a ij φ i φ j + ∑ i = 1 n ∑ j = 1 n ∑ k = 1 n a ijk φ i φ j φ k + … (here, FZ(Zi): a power distribution value at position Zi, Φi, Φj, Φk: signals of detectors at respective positions).
摘要翻译:本文公开的是使用优化的非线性基函数通过组合核反应堆内部或外部的中子探测器的信号来合成核反应堆功率分布的方法。 该方法包括搜索优化的基础函数组合,而不是先前确定基函数的形状,使得误差发生最小化,并且确定合成函数的形状。 当搜索优化基函数组合并确定合成函数的形状时,使用以下等式。 FZ(Z i)= a 0 +Σi = 1 n a a&phgr i +Σi = 1 nΣj = 1 n a ajj&phgr 我和phgr j +Σ i = 1 nΣ j = 1 nΣ k = 1 n a a ijk&phgr; 我和phgr j&phgr k + ...(这里,FZ(Zi):位置Zi,Φi,Φj,Φk的功率分布值:各位置处的检测器的信号)。
摘要:
According to one embodiment of a reactor core monitoring system, includes: an information retention portion for retaining a regular cycle and a short cycle as calculation information of reactor core performance data; a signal processing portion for creating heat balance data based on a process signal; a data acquisition portion for acquiring, in a timing of the regular cycle, the heat balance data and reactor core performance data which was calculated in a previous timing of the regular cycle, while acquiring, in a timing of the short cycle asynchronous to the regular cycle, the heat balance data and reactor core performance data which was calculated most recently; and a data calculation portion for calculating new reactor core performance data based on the acquired reactor core performance data and the heat balance data.
摘要:
A method for producing energy from a nuclear fuel material contained in an enclosure, through a process of breeding of a fissile element from a fertile element of the fuel material via a .beta.-precursor of the fissile element and fission of the fissile element. A high energy particle beam is directed into the enclosure for interacting with heavy nuclei contained in the enclosure so as to produce high energy spallation neutrons. The neutrons thereby produced are multiplied in steady sub-critical conditions by the breeding and fission process. The breeding and fission process is carried out inside the enclosure.
摘要:
A temperature regulation system of a pressurized water nuclear reactor is inhibited when a combination of the nuclear and the axial power difference exceeds a predetermined inhibit threshold.
摘要:
Method of monitoring a nuclear power station by gathering information, called parameters, relating to the operation and state of the power station and its auxiliary equipment, comparing these parameters with reference data corresponding to normal operation, and signaling the differences, in order to permit an operator to evaluate the state of the power station very quickly, and to undertake any needed steps promptly.