Performance Qualification Test of the CRDM for JRTR

Title & Authors
Performance Qualification Test of the CRDM for JRTR
Choi, M.H.; Cho, Y.G.; Kim, J.H.; Lee, K.H.;

Abstract
A control rod drive mechanism(CRDM) is a reactor regulating system, which inserts, withdraws or maintains a control rod containing a neutron absorbing material within a reactor core to control the reactivity of the core. The top-mounted CRDM for Jordan Research and Training Reactor(JRTR) with 5 MW power has been designed and fabricated based on the HANARO's experience through KAERI and DAEWOO consortium project. This paper describes the performance qualification test results to demonstrate the operability of a prototype and four production CRDMs during the reactor lifetime. The driving performance, the drop performance and the endurance tests for CRDM are carried out at a test rig simulating the actual reactor conditions. A vibration of internal components due to the coolant flow is also measured using a laser vibrometer. As a result, the CRDMs are driven having a good driving performance without a malfunction between command and output signals for the stepping motor. Also, the pure drop time and the impact acceleration are within 0.72 s and 4.2 g to meet the design requirements, and the vibrational displacement of control rod is measured as maximum $\small{5.2{\mu}m}$.
Keywords
JRTR;CRDM;Performance Qualification;Drop Test;Endurance Test;Test Rig;
Language
Korean
Cited by
1.
JRTR 제어봉구동장치의 내진시험,최명환;김경호;선종오;조영갑;

한국소음진동공학회논문집, 2016. vol.26. 5, pp.552-558
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