Document 4JpYyzLq1jaw6j35Mn0vONeVp
ABD00279847
COMPLIANCE PLAN CAPITAL ITEMS REACTOR VALVE LIMIT SWITCH REPLACEMENT
ABERDEEN CHEMICAL PLANT September 9, 1985
A
WORK BY:
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Frank G. Jeanson
Process Engineer
REVIEWED AND APPROVED BY: Veldon E. Messick Chief Process Engineer
ABD00279848
COMPLIANCE PLAN CAPITAL ITEMS REACTOR VALVE LIMIT SWITCH REPLACEMENT
ABERDEEN CHEMICAL PLANT TABLE OF CONTENTS
I.PURPOSE AND PROCESS DESCRIPTION II. INSTRUMENT SPECIFICATIONS III. DRAWINGS
A
ABD00279849
COMPLIANCE PLAN CAPITAL ITEMS
REACTOR VALVE LIMIT SWITCH REPLACEMENT
ABERDEEN CHEMICAL PLANT
I. Purpose and Process Description
The purpose of this design is to provide the valves on the reactors with accurate indication in the control room of the valve position. The existing limit switches do not provide this accuracy, since they are operated by the position of the actuator and not the actual valve stem. This type of operation does not take into account the possibility of shearing between the valve stem and actuator, which has occurred here in the plant. This poses a potentially hazardous situation for a VCM release.
This design will provide each of the designated valves on the reactors with a new limit switch that operates on the position of the valve stem. These new limit switches will provide accurate indication in the control room and eliminate the hazard of a valve being open when it's actuator position is showing closed.
A total of 70 valves will be equipped with this new type of limit switch. These limit switches will be mounted on the bracket between the valve and the actuator. Drawings of several different types of valves with the new limit switches are attached. Table I lists the valve location and manufacturer. Table II lists the different types of valves, quantity of each and actuator type.
ABD00279850
Reactor 745
+ 700
600 +
500
600 500 400
300
TABLE I
Valve Location
Size
Chem Wash Rtrn. Hot H^O Charge Sewer Dump
6" 6" 6" 6"
Evacuation Recovery Vent
8" 6" 4"
Chem Wash Rtrn. 6"
Hot ^0 Charge 6"
Sewer
6"
Dump
6"
Evacuation Recovery Vent
6" 6" 3"
Vent
3"
Chem Wash Rtrn. 6"
Hot HjO Charge 6"
Sewer
6"
Dump
6"
Evacuation Recovery Vent
6"
6" 3"
Chem Wash Return
Hot H2O Charge 6"
Sewer
6"
Dump
6"
6"
Manufacturer
Jamesbury (Ball) TuFline (Plug) 150 Jamesbury (Ball) Jamesbury (Ball)
TuFline (Plug) 150 TuFline (Plug) 150 TuFline (Plug) 300
KTM E0106 (Ball) TuFline (Plug) 150 TuFline (Plug) 150 WKM 6FBI 12 (Ball)
TuFline (Plug) 150 TuFline (Plug) 150 WKM (Ball) 3RB100
TuFline (Plug) 300
WKM (Ball) 6FB123 Module 310C TuFline (Plug) 150 Durco (Plug) 6411 WKM (Ball) 310
TuFline (Plug) 150 TuFline (Plug) 150 WKM (Ball) 3RB100 310C
KTM (Ball) E0106 TuFline (Plug) 150 TuFline (Plug) 150 WKM (Ball) 6FBI12 310 B
ABD00279851
Reactor
744 743 742 +741
Valve Location
Evacuation Recovery Vent
Size
6" 6" 3"
Manufacturer
TuFline (Plug) 150 TuFline (Plug) 150 TuFline (Plug) 300
Chem Wash Rtm. Hot ^0 Charge Sewer Dump
6"
6" 6" 6"
Evacuation Recovery Vent
6" 6" 3"
WKM (Ball) 6F-B130 310B WKM (Ball) 6X4-B102 WKM (Ball) 6X4-B102
WKM (Ball) 6F-B112 310B
TuFilne (Plug) 150 TuFline (Plug) 150 WKM (Ball) 3KB150
ABD00279852
A V
ABD00279853
COMPLIANCE PLAN CAPITAL ITEMS REACTOR VALVE LIMIT SWITCH REPLACEMENT
ABERDEEN CHEMICAL PLANT
III. Instrument Specification Item
PLS-101 through 170
Description Promimity Limit Switches