浸水燃料内圧挙動計算コード「WTRLGD」

概要

論文の詳細を見る
WTRLGD has been developed to analyze the behavior of the internal pressure of a waterlogged fuel rod in an assumed RIA (Reactivity Initiated Accident) condition of a light water reactor or in the experiments simulating RIA (NSRR or SPERT-CDC programs), and any program for such a purpose has not been reported yet. It is also possible to estimate the failure threshold of a waterlogged fuel rod with the program as the failure behavior is directly connected with the rod pressure. The program is mainly composed of three elements, calculation of the temperature distribution of a rod, determination of the axial motion of the fluid within a rod and the evaluation of the fluid state, pressure and specitic volume etc, with the consideration of cladding deformation. The present report describes the mathematical models, the basic equations and the method of the numerical calculation for the each element of the program, and also the example of the analyses for the NSRR waterlogged fuel rod tests as the trial application. According to the trial analyses, the program can estimate the failure threshold of a waterlogged fuel rods within the ±5% discrepancy from the NSRR test results, thus it is confirmed that the program could be reasonable, at least partially.
独立行政法人海上技術安全研究所の論文
1979-07-31