Published September 27, 1991 | Version v1
Patent Metadata-only

Method of operating BWR type reactor

Creators

Description

In a method of operating a BWR type reactor, after reaching a power level at which the increase of a recycling flow rate is allowed by a withdrawal of control rods, power is increased by the withdrawal of the control rods and the increase of the recycling flow rate within a range of not exceeding the thermal restriction value of the fuel. After the recycling flow rate reaches the upper limit value or a planned value, the power is increased by the withdrawal of the control rods. If a margin relative to the fuel thermal restriction value of the fuel is decreased, or the control rod operation is interrupted till a zenon accumulation amount is increased to increase the thermal margin. The control rods are withdrawn repeatedly till a control pattern capable of reaching the rated power by the increase of the recycling flowrate is obtained. Thereafter, the control rods are gradually withdrawn along with zenon accumulation and a control rod pattern as a final target is attained. In view of the above, the time for reaching the rated operation while increasing the margin of the operation region is shortened. (N.H.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
7 p.
IPC:
Int. Cl. G21C7/00.
IPC
Int. Cl. G21C7/00.
Patent number
JP patent document 3-220495/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
23039989
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; CONTROL ELEMENTS; FLUID FLOW; FORCED CONVECTION; LIMITING VALUES; NUCLEAR FUELS; REACTOR OPERATION; THERMODYNAMIC PROPERTIES; XENON
Descriptors DEC
CONVECTION; ELEMENTS; ENERGY SOURCES; ENERGY TRANSFER; ENRICHED URANIUM REACTORS; FUELS; HEAT TRANSFER; MATERIALS; NONMETALS; OPERATION; PHYSICAL PROPERTIES; POWER REACTORS; RARE GASES; REACTOR COMPONENTS; REACTOR MATERIALS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 2-17402.