선용접방법으로 제작된 16×16 최적화 H형 스프링 지지격자에 대한 진자식충격시험

다국어 초록 (Multilingual Abstract)

The General roles of a spacer grid(SG) are providing a lateral and vertical support for fuel rods, promoting a mixing of coolant and keeping guide tubes straight so as not to impede a control rod insertion under any normal or accidental conditions. To evaluate the impact characteristics of a SG such as impact velocity, critical buckling strength and duration time, a few types of impact tests for SGs have been conducted. In a previous study, a new welding method, a through-welding method, was proposed to increase critical buckling strength of a SG without any design change or material change and was verified by impact tests with 1×7 partial SG specimens. In this paper, the effect of through-welding method in case of a 16×16 full-size SG is investigated by pendulum impact tests with 16×16 SG specimens. And the increase of critical buckling strength for full-size SGs is measured by comparison with impact results of spot-welded and through-welded SGs.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 진자식 충격시험
• 3. 선용접방법 및 충격시험시편
• 4. 충격시험결과
• 5. 결론
• 후기
• 참고문헌