Apparatus and method for closedloop control of reactor power in minimum time
Abstract
Closedloop control law for altering the power level of nuclear reactors in a safe manner and without overshoot and in minimum time. Apparatus is provided for moving a fastacting control element such as a control rod or a control drum for altering the nuclear reactor power level. A computer computes at short time intervals either the function: .rho.=(.beta..rho.).omega..lambda..sub.e '.rho..SIGMA..beta..sub.i (.lambda..sub.i .lambda..sub.e ')+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e '.omega.] or the function: .rho.=(.beta..rho.).omega..lambda..sub.e .rho.(.lambda..sub.e /.lambda..sub.e)(.beta..rho.)+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e .omega.(.lambda..sub.e /.lambda..sub.e).omega.] These functions each specify the rate of change of reactivity that is necessary to achieve a specified rate of change of reactor power. The direction and speed of motion of the control element is altered so as to provide the rate of reactivity change calculated using either or both of these functions thereby resulting in the attainment of a new power level without overshoot and in minimum time. These functions are computed at intervals of approximately 0.011.0 seconds depending on the specific application.
 Inventors:

 (72 Paul Revere Rd., Needham Heights, MA 02194)
 Issue Date:
 OSTI Identifier:
 866761
 Patent Number(s):
 4781881
 Application Number:
 07/000,472
 Assignee:
 Bernard, Jr., John A. (72 Paul Revere Rd., Needham Heights, MA 02194) OSTI
 DOE Contract Number:
 012763
 Resource Type:
 Patent
 Country of Publication:
 United States
 Language:
 English
 Subject:
 apparatus; method; closedloop; control; reactor; power; minimum; time; law; altering; level; nuclear; reactors; safe; manner; overshoot; provided; moving; fastacting; element; rod; drum; computer; computes; intervals; function; rho; beta; omega; lambda; sigma; functions; specify; rate; change; reactivity; achieve; specified; direction; speed; motion; altered; provide; calculated; resulting; attainment; computed; approximately; 011; depending; specific; application; control element; nuclear reactors; power level; control rod; nuclear reactor; time interval; specific application; time intervals; reactor power; minimum time; closedloop control; safe manner; control law; loop control; /376/976/
Citation Formats
Bernard, Jr., John A. Apparatus and method for closedloop control of reactor power in minimum time. United States: N. p., 1988.
Web.
Bernard, Jr., John A. Apparatus and method for closedloop control of reactor power in minimum time. United States.
Bernard, Jr., John A. Tue .
"Apparatus and method for closedloop control of reactor power in minimum time". United States. https://www.osti.gov/servlets/purl/866761.
@article{osti_866761,
title = {Apparatus and method for closedloop control of reactor power in minimum time},
author = {Bernard, Jr., John A.},
abstractNote = {Closedloop control law for altering the power level of nuclear reactors in a safe manner and without overshoot and in minimum time. Apparatus is provided for moving a fastacting control element such as a control rod or a control drum for altering the nuclear reactor power level. A computer computes at short time intervals either the function: .rho.=(.beta..rho.).omega..lambda..sub.e '.rho..SIGMA..beta..sub.i (.lambda..sub.i .lambda..sub.e ')+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e '.omega.] or the function: .rho.=(.beta..rho.).omega..lambda..sub.e .rho.(.lambda..sub.e /.lambda..sub.e)(.beta..rho.)+l* .omega.+l* [.omega..sup.2 +.lambda..sub.e .omega.(.lambda..sub.e /.lambda..sub.e).omega.] These functions each specify the rate of change of reactivity that is necessary to achieve a specified rate of change of reactor power. The direction and speed of motion of the control element is altered so as to provide the rate of reactivity change calculated using either or both of these functions thereby resulting in the attainment of a new power level without overshoot and in minimum time. These functions are computed at intervals of approximately 0.011.0 seconds depending on the specific application.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {11}
}