원전용 게이트 밸브 디스크의 접촉모델에 대한 연구

다국어 초록 (Multilingual Abstract)

Valve assembly must be qualified with technical guide of ASME QME-1 before using in nuclear power plant. In general, the qualification is to be performed by experiment, but lately the new version of ASME QME-1 is to require the qualification by the test based methodology. This study shows that the differential force on disk by fluid flow is to generate the contact force and frictional force on seat ring and guide bar. The last frictional force is to be transferred to the stem nut. The related mechanics is to be solved by multi-body dynamics. The fluid force on disk, named as differential pressure force, is to be calculated using interpolation of dimensionless differential pressure force by computational fluid dynamics(CFD). And the interpolation equation is to be made in multi-body dynamics solver and be applied for the force calculation using dimensionless stroke as dependent variable. This study shows that the contact model on disk, seat ring, and guide bar is to generate similar and proper data on thrust, torque, and stem factor. This study may be useful to evaluate the contact force on the gate valve in detail, that has been considered by simple assumption using limited experiment.

참고문헌 (Reference)

1 김재형, "원전용 평형 글로브 밸브의 유동특성 및 추력특성에 대한 수치해석" 한국전산유체공학회 22 (22): 81-88, 2017

2 김재형, "원전용 능동기기 주요 성능특성 평가를 위한 수치해석 연구" 한국전산유체공학회 24 (24): 72-78, 2019

3 김재형, "원전용 게이트 밸브의 성능특성 분석을 위한 유동해석 모델링 연구" 한국전산유체공학회 25 (25): 74-84, 2020

4 "Nuclear Maintenance Applications Center : Application Guide for Motor-Operated Valves in Nuclear Power Plants - Revision 2 (Volume 1: Gate and Globe Valves)" EPRI 2007

5 "IEEE Std. 382-1996, IEEE Standard for Qualification of Actuators for Power-Operated Valve Assemblies With Safety-Related Functions for Nuclear Power Plants"

6 "EPRI MOV Performance Prediction program(Stem/Stem-Nut Lubrication Test Report)" Electric Power Research Institute 1993

7 "EPRI MOV Performance Prediction program(Motor-Operator Separate Effects Testing)" Electric Power Research Institute 1995

8 "EPRI MOV Performance Prediction program(Gate Valve Design Effects Testing Results)" Electric Power Research Institute 1994

9 "EPRI MOV Performance Prediction program(Computation of Flow Fields in Gate Valves)" Electric Power Research Institute 1993

10 "ASME QME-1a-1998/2002, Qualification of Active Mechanical Equipment Used in Nuclear Power Plants"

11 김재형, "A study on calculation of friction coefficient and packing stress using static diagnosis test for a balanced globe valve in nuclear power plants" 한국원자력학회 53 (53): 2509-2522, 2021