Table 3 Weighted values of keywords in workshop-level accident keywords (top 30)

1

Gasifier

0.1041

11

Flow

0.0472

21

Furnace shutdown

0.0308

2

Boiler

0.0715

12

Overhaul

0.0458

22

Surge

0.0307

3

Central Control Room

0.0698

13

Discover

0.0423

23

Gasification

0.0302

4

Load

0.0601

14

Interlock

0.0404

24

Scheduling

0.0293

5

Check

0.0590

15

Pressure

0.0386

25

Pulverized coal

0.0287

6

Induced draft fan

0.0589

16

Valve

0.0331

26

Meter

0.0283

7

Fan

0.0550

17

Start-up

0.0322

27

Compressor

0.0280

8

Running

0.0531

18

Trip

0.0322

28

Conversion

0.0280

9

Workshop

0.0518

19

Switch

0.0319

29

Shut down

0.0277

10

Liquid level

0.0518

20

Stop

0.0319

30

Economizer

0.0257