Bhopal:
The Indian Space Research Organisation (ISRO) has introduced significant modifications to improve the reliability of its trusted Polar Satellite Launch Vehicle (PSLV). Following technical glitches during the third stage of two consecutive missions, the space agency has successfully conducted a ground test of the modified third stage, designated PS-3. The test was carried out on November 12 at the Static Test Facility of the Satish Dhawan Space Centre in Sriharikota.
According to ISRO, abnormal conditions were observed in the third stage during the PSLV-C61 and PSLV-C62 missions. Following these incidents, scientists undertook a comprehensive review of the stage’s design, raw material quality, manufacturing processes, assembly procedures and inspection systems. Based on the findings, structural improvements were introduced to strengthen the third stage.
The modifications include improvements to the solid-propellant motor nozzle configuration to enhance design safety margins. Mechanical joints have also been strengthened, while additional safeguards have been incorporated into the sealing system. Standards governing raw material acceptance, assembly procedures and quality inspections have been revised.
ISRO has also introduced new non-destructive testing (NDT) procedures at various stages of integration and transportation. These tests are designed to help identify potential defects without causing damage to the components.
Following the successful test, ISRO will undertake a detailed analysis of the collected data. The agency has clarified that further tests will be conducted based on a review of the findings.
The successful ground test marks an important step towards restoring confidence in the PSLV and preparing the launch vehicle for regular future missions.
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