Emergency Disable System

Emergency Disable System (or EDS for short) was the primary way of categorizing safety systems related to shutting down reactors on the TLS 2.

The control circuit of a reactor at Unit 2 showing EDS signal redstone receivers.

Categories

EDS was split into a few categories, differing in the was EDS acted upon being pressed.

Despite there being multiple categories used on the server, in reality only EDS-2 was used the most, with EDS-5 usually being installed in other power plants.

All subsequent EDS categories typically expand on the preceding category.

2nd Category (EDS-2)

This was the most common and fundamental category of EDS. The annunciators for EDS-2 were also usually labelled "SCRAM" as that's basically the only thing this category did - simply SCRAM the reactor.

5th Category (EDS-5)

It functions virtually the same way as EDS-2, with the only change being it usually turned on the alarm as well.

7th Category (EDS-7)

This was an EDS category exclusive to Unit 2. It allowed any controller in the control room to quickly shut down every reactor in the power plant.

Usage in Power Plants on the server

Power Plant	EDS-2	EDS-5	EDS-7	Notes
Unit 1	✓	✓	✗
Unit 2	✓	✓	✓
Unit 3	✗	✓	✗
Unit 4	✓	✗	✗	The EDS category type was not defined on the signs

Trivia

• It was recommended to use EDS-2 to shutdown the reactors instead of using the master switch. A sign saying this can still be found in Unit 1's control room on the master switch sign.
  • In reality this recommendation didn't actually have any real reason behind it. The EDS itself basically inverts the redstone signal in reactor's m control circuit.