Reactivity Worth Measurement of Control Rods of CFBR-II with Inverse Kinetics Method

Journal Article · Sat Jul 01 04:00:00 EDT 2017 · Transactions of the American Nuclear Society

OSTI ID:23050307

Yin, Yanpeng; Zhou, Haojun; Li, Meng ^[1]

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1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900 (China)

CFBR-II is a Godiva type metal HEU fast burst reactor. Reactivity adjustment of the reactor depends on three metal HEU rods (CPI, CP2 and CP3), which have positive reactivity worth. Reactivity effectiveness curves of the three rods are important to safe operation and control of CFBR-I. To measure the reactivity, two different techniques were used: the asymptotic period method (APM) and the inverse kinetic method(IKM). The APM is the most common used method on fast burst reactor, which measured the asymptotic power period then determined reactivity with the in-hour equation. This method only works for positive periods (super criticality state). The IKM can measured continuously reactivity changes by analyzing the variation of reactor power level with the inverse kinetic equation, which works for both subcritical and super critical state. We will mainly discuss how to measure reactivity effectiveness curves of control rods by the IKM.

• OSTI ID: 23050307
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 116; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
ASYMPTOTIC SOLUTIONS
CONTROL ELEMENTS
CRITICALITY
KINETIC EQUATIONS
KINETICS
METALS
PULSED REACTORS
REACTIVITY WORTHS
REACTOR CONTROL SYSTEMS
REACTOR OPERATION