637 Rx Preheater Tube Rupture

Question 1

1.1 IMMEDIATE ACTIONS

CCR 1.1.1 - NOTIFY Fire Department at extension 4444 that Light HDS Unit has a Tube Rupture and Fire, and provide name, unit, and location of fire, and ENSURE information is understood before hanging up.

Answer 1

CCR 1.1.2 - NOTIFY the following of Tube Rupture at 637 HDS Unit:

Question 2

*Supervisor
*FCCU Console Operator
*BBC Console Operator
*Lube Utilities Console Operator
*SRC Console Operator

Answer 2

CCR 1.1.3 - NOTIFY FCCU to line up C6 Splitter tower to off test tank.

Question 3

1.1.4 - DISCONTINUE feed to 637 Unit as follows:

Answer 3

CCR A. NOTIFY FCCU to divert #1 and #2 Debutanizer bottoms away from 637 HDS.

Question 4

Oper B. DIVERT 534 Depentanizer Light Coker Naphtha feed stream away from 637 HDS.

Answer 4

CCR C. NOTIFY BBC Console to divert 734 Depent Bottoms stream away from 637 HDS.

Question 5

CCR D. NOTIFY BBC Console to divert #2 Deprop Bottoms feed stream away from 637 HDS.

Answer 5

Oper E. WHEN feed streams are diverted from unit, CLOSE 12” inlet block valve to 637D0001, Feed Surge Drum.

Question 6

CCR F. PLACE 67FC1152, Heavy Py Feed in “MANUAL” and close.

Answer 6

CCR 1.1.5 - PUSH one of the following pushbuttons to initiate HDS Section Emergency Depressurizing System:

Question 7

*HDS Section Emergency Depressurizing DCS Soft Switch (HS5023B) on console

*HDS Section Emergency Depressurizing Local Mounted Switch (HS5023A) at grade 30 Ft South of Compressor Lube Oil Vat of 3rd deck of Product Seperator structure

Answer 7

CCR/Oper 1.1.5 - ENSURE shutdown isolation valves and alarms on Emergency Depressurizing Sysem are in the following positions:

Question 8

*Depressurizing Vavle (XV5023), is OPEN
*Depressurizing Alarm (XA5023), is ACTIVE
*Rx Charge Pumps (637P0001A/B), are DOWN
*Splitter Bottoms Pumps (P0019A/B) is down

Answer 8

*HDS Feed Pumps (P0018A/B) Feed Pumps is down
*Fuel Gas Isolation Valves (XV5003 and XV5004), are CLOSED
*Fuel Gas Trip Alarm (XA5014A/B), is ACTIVE
*Makeup Hydrogen Isolation Valve (XV5024) is CLOSED

Question 9

*Recycle Gas Compressor (637C0001), is DOWN
*Recycle Gas Compressor trip alarm (XA5062A/B), is ACTIVE
*Wash Water Circulation Pumps (637P0003A/B) are DOWN

Answer 9

*Recycle Hydrogen to SHU Guard Rx (R4) and Diolefin Saturator (R1), Chopper valve (XV5271) closed
*HP Stream to SHU Preheater Chopper valve (XV5259) is closed
*Splitter Bottoms Release to HDS Section Chopper valve (XV5237) is closed

Question 10

*Steam to Splitter Reboiler Chopper valve (XV5225) is closed
*HDS Feed to Rx Section Chopper valve (XV5255) is closed

Answer 10

CCR 1.1.7 - NITROGEN PURGE 67F0001, Mercaptan Rx Feed Preheater, by performing the following:

Question 11

CCR A. PLACE 67HS5002B, Nitrogen Purge OPEN/CLOSE Switch, in the “OPEN” position.

Answer 11

CCR/Oper B. VERIFY 67XV5002, Nitrogen Purge Valve, opens.

CCR/Oper C. PURGE heater until all hydrocarbons have been removed.

Question 12

1.2 SUPPLEMENTAL ACTIONS

CCR/Oper *Manage Stabilizer Tower temperature.

Answer 12

THIS IS THE END OF THE PROCEDURE