After returning the assembly building, inspect it and determine the cause.
The future schedule is unclear… Assembly
The second launch of the Korean launch vehicle Nuri (KSLV-II), scheduled for the 16th, was canceled on the 15th, a day before the scheduled date.
According to the Korea Aerospace Research Institute (KAI), preparations for the launch of the Nuri on the 15th went smoothly until early afternoon, but the launch on the 16th became impossible as an unknown sensor signal abnormality was discovered around 2:05 pm.
The future schedule is unclear.
At 5:20 p.m. on the 15th, the Korea Air Association held a press briefing at the Naro Space Center in Goheung-gun, Jeollanam-do and said, “It was confirmed at 2:05 pm that the level sensor of the oxidizer tank showed an abnormal level.” “I thought it was impossible,” he said.
The oxidizer level sensor is a facility that measures the level of the oxidizer (liquid oxygen) in the cryogenic temperature (below 183 degrees below zero) charged inside the oxidizer tank.
Koh Jung-hwan, head of the Korea-type launch vehicle development business division at the Air Force, explained the problem situation, saying, “When the (projectile) stands up, the sensor value (of the level sensor) should change, but it doesn’t.” “The sensor shows the same value.”
He continued, “We tried to determine the cause, but it was difficult to confirm while standing, so we decided that preparations for launch could not proceed in the current state.” said.
Director Koh added, “During the inspection process, no particular problematic parts were identified.”
Currently, it is unknown when the launch will be resumed because the anti-accidental agency has not been able to figure out the cause of the problem at all.
Regarding the cause, General Manager Koh said, “The sensor itself may be abnormal, or the connection cable may be abnormal.” “It may be an abnormality in a device called a terminal box that receives the signal measured by the sensor and converts it into a signal that we can understand.” He suggested various possibilities as conjectures.
As a result, the Korean Air Association completed the work of removing the standing Nuri from the launch pad, lowering it, laying it down, loading it on an unmanned special mobile vehicle, and moving it back to the projectile assembly building (assembly building) at 10:30 pm on the same day. We will work to understand it and improve it.
In consideration of the possibility of schedule changes, the Nuri launch management committee has set the preliminary launch date from the 16th to the 23rd.
If the problem situation is not resolved within this period, the launch management committee should be held again to discuss the future schedule.
In addition, the Korean government must go through the process of notifying the international community of the launch-related schedule again.
Lee Sang-ryul, director of Hang Woo-yeon, said, “I am embarrassed and a lot of people are here, but I am very sorry that this happened.
Preparations for launch of the Nuri were proceeding as planned until a sensor signal abnormality was discovered.
The Nuri-ho departed from the assembly building of the Naro Space Center at 7:20 am on the same day and arrived at the launch pad at 8:30 am, and with the help of an erector, an erector that stands vertically on the launch pad. Following this, the work of fixing the launch pad was completed at 11:30 am.
/yunhap news