| 摘要 |
FIELD: nuclear power engineering. SUBSTANCE: method involves ultrasonic scanning of fuel elements in space under test filled with water and recording of ultrasonic signals reflected from dry and wet boundaries of inner surface of fuel element cladding which are used to determine unsealed fuel elements; prior to scanning, pressure within space under test is raised to value not over maximum pressure within reactor; in addition, scanning is conducted before and after raising the pressure, and difference in recorded signals is used to determine unsealed fuel elements. EFFECT: improved effectiveness of detection of faulty fuel elements due to increasing difference between signals coming from faulty and good fuel elements; reduced time taken for inspection due to facilitated processing of recorded signals. |
