The phrase "a shut down system" is correct and usable in written English.
It can be used to describe a system that has been turned off or is not operational.
Example: "Due to the power outage, we are currently dealing with a shut down system that needs to be rebooted."
Alternatives: "a disabled system" or "an offline system".
Shut Down System-1 (SDS-1) consists of mechanical shut off rods and Shut Down System-2 (SDS-2) based on liquid poison injection into the moderator.
Two onboard batteries were not providing enough power to keep systems working while in the earth's shadow, so the onboard computer was automatically shutting down systems.
The primary function of the shut down system in a nuclear reactor is to terminate any reactivity transient occurring in the core during its entire design life.
The effect of flooding the contact second shut down system (SSS) chamber with water and gadolinium nitrate on the reactor core reactivity in the presence of HPTL.
The A3 employs a shut-down system that decouples the electric drive system from the car's power supply in any collision significant enough to deploy an air bag or seatbelt pre-tensioner, meaning the battery would cease feeding power into the motor.
In Advanced Heavy Water Reactor AHWRR), two active, independent, functionally diverse, fast acting shut down systems are used.
You can shut down systems [using] credential management and the device it's carried on.
A county judge in Alabama has temporarily shut down a system in a town near Birmingham where people fined for speeding and unable to afford the ticket are handed over to a private probation company and sometimes sent to jail, where additional fees are imposed.
Closer to home, a cyberattack shut down the computer systems of a Newark, New Jersey Police Department.
Shut down the system right away.
Shut down the system and either temporarily or permanently connect the new hard drive.
