HDSO - Loss of Hydrogen

Question 1

1.1 IMMEDIATE ACTIONS

1.1.1 - IF Light HDS Unit pressure is lost, CHECK TDC3000 Console for the following:

Answer 1

CCR
*Tail Gas pressure in 630/631 Unit less than 360 psig, as indicated by Tail Gas Pressure Indicator Controller (60PC0005)

Question 2

CCR
*630/631 Unit Hydrogen Feed pressure less than 215 psig, as indicated by Hydrogen Feed Presure Controller (62PC0350)

Answer 2

CCR
*Tail Gas pressure in 632 Unit less than 450 psig, as indicated by Tail Gas Pressure Indicator Controller (62PC0302A)

Question 3

Oper 1.1.2 - VISUALLY VERIFY appropriate Feed Hydrogen & Recycle Compressor(s) are RUNNING.

Answer 3

Oper 1.1.3 - VISUALLY MONITOR appropriate Feed Hydrogen & Recycle Compressor(s) Make-up Discharge Bottle Local Temperature Indicator.

Question 4

Oper 1.1.4 - IF Feed Hydrogen & Recycle Compressor Make-up Discharge Bottle UNLOAD the Makeup end of Compressor.

Answer 4

1.1.5 - IF pressure indications on the following applicable units are NOT EQUAL, PERFORM HDSO-EOP-5018 Gas Leaks procedure:

Question 5

Oper
*Hydrogen Feed pressure Indicator located on Feed Hydrogen Compressor Suction Knockout Drum

Answer 5

Oper
*Make-up Drum pressure, as indicated by Local Pressure Gauge

Question 6

Oper
*Hydrogen & Recycle Compressor Suction Bottle pressure, as indicated by Local Pressure Gauge

Answer 6

1.2 SUPPLEMENTAL ACTIONS

1.2.1 - NOTIFY the following of loss of Light HDS Unit pressure or Hydrogen:

Question 7

CCR/Oper
*Shift Supervisor
*BBC Console Operator
*Coker Console Operator

Answer 7

1.2.2 - IF pressure indications in Step 1.1.5 are EQUAL, PERFORM the following for applicable unit:

Question 8

CCR A. REDUCE Feed Rate to 630/631 HDS Units.

B. ENSURE the following pressure controllers are OPERATIONAL:

Answer 8

CCR/Oper
*Tail Gas Pressure Controller for 630/631 Unit (60PC0005)

*Tail Gas Pressure Controller for 632 HDS Unit (62PC0302)

Question 9

CCR
C. CLOSE Flow Controller (62FC0100), to cut feed to 632 HDS Unit.

Answer 9

CCR
D. IF Light HDS Unit pressure is lost, OPEN Divert Valve (MOV-4), to divert excess feed to 815 Tank.

Question 10

1.2.3 - IF Hydrogen flow to Light HDS is lost, ENSURE the SIS CLOSED Fuel Gas Supply isolation valves for appropriate Rx Feed Heater(s):

Answer 10

Oper
*Rx Feed Heater (630F0001)
*Rx Feed Heater (631F0002)
*632 Rx Heater (632F0001)
*632 LEF Reboiler Heater (632F0002)

Question 11

CCR/Oper/Fuel Dept
1.2.4 - COORDINATE replacement Hydrogen from Air Products or Channelview.

Answer 11

1.2.5 - IF Light HDS Unit pressure is DECREASING, or Hydrogen flow is NOT RESTORED, PERFORM the following Emergency Shutdown procedures:

Question 12

CCR/OPER
*60-EOP-5001, 630 HDS Unit Emergency Shutdown
*61-EOP-5002, 631 HDS Unit Emergency Shutdown
*62-EOP-5001, Emergency Shutdown

Answer 12

THIS IS THE END OF THE PROCEDURE