Reactive power management

The basic objectives of a reactive power management system can be identified by the following for LT and HT distributions ... 

This product can be reduced by reducing X, using series capacitance with a reactance X, which will reduce to - Xq. This is where reactive control plays a major role. By meticulous reactive power manage-ment, the Ferranti effect can be controlled and the electrical line length increased to the desired level. It is a different matter that the electrieal length of the line cannot be raised infinitely, for reasons of stability, as discussed later. 

With the power off, there was no way of regaining control through the bitek processors. Every platform would have to be reactivated manually. Which was exactly what Kiera had done. Spacecraft had rendezvoused with the platforms and taken out Rubra s bitek management processors, replacing them with electronic processors and new fire authority codes. 

Developing an objective approach to risk management is as much about the language we use as it is the processes we put in place. Those who have the authority to undertake a safety assessment have a responsibility to wield that power carefully and shrewdly and this can quickly be undermined when one resorts to emotive and reactive language. This is as true for the language of the safety case as it is in the corridor conversations with colleagues. Those who operate in CRM have a duty to propagate objectivity by example and to communicate in a way that drives a safety culture which is not rash but considered. 

During the MK-II operation, extensive data were accumulated from start-up and core characteristics tests. These core management and core characteristics data were compiled into a database [2]. The core management data includes core specifications and configurations, atomic number densities before and after irradiation, neutron and gamma flux, neutron fluence, fuel bumup, and temperature and power distributions. The core characteristics data include excess reactivities, control rod worths, and reactivity coefficients, e.g., temperature, power and bumup. These core characteristics data were recorded on CD-ROM for user convenience. 

AR141 Accident management programmes in nuclear power plants A guidebook. No. 368, 13 July 1994. AR142 Reactivity accidents, No. 354, 23 April 1993. 

The coupled code JOSHUA is of particular Importance in the natural uranium SGHWR project. It has been used to show that the fuel management scheme may be designed to offset some of the consequences of the positive void coefficient. Since steam voids Increase reactivity there is a tendency for the power to peak towards the channel exit. This may be corrected by loading fresh fuel at the lower end of the channel and moving the parts of ein axially sub-divided element upwards during irradiation. 

In DHRUVA, on-line computation of important physics and process parameters has been achieved. The parameters selected are reactor thermal power, reactivity load due to Xenon, core reactivity balance, heavy water system inventory and performance monitoring of shut-off rods control valve and dump valves. Also off-line application for fuel management, failed fuel detection and location, and stores inventory management have been implemented. 

Displays and monitoring of management computer syst Technical data (reactivity, neutron flux, thermal power, etc.), trend gr hs of the past operation cycles, print out of operation data. 

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