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Table of Contents
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Summary of Contents for Tracerco Profiler Series
- Page 1 Tracerco Profiler – Radiological User’s Guide MI1028 Rev B...
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Page 2: Table Of Contents
Lifting Procedure for the Tracerco Profiler ......................10 5.1.1. Handling ..................................10 5.1.2. Detailed Lifting Procedure for the Tracerco Profiler ....................... 10 5.1.3. Lifting the instrument from a horizontal position to a vertical position: ................11 5.2. Approximate weights: .............................. 12 5.3. - Page 3 9.7. Contamination from abrasive action ........................24 9.8. Fire / Site emergency .............................. 24 10. Rules for Disposal ..........................24 11. Leakage Testing........................... 24 12. Maintenance ............................25 12.1. Routine Maintenance/Inspection ..........................26 13. Document Control ..........................26 14. Appendix A Isodose plots ........................27 15.
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Page 4: Introduction
Figure 1. Each phase has a different density. The Tracerco Profiler Series and Tracerco Profiler WS Series are an advanced Specialist Measurement instrument used to identify different phases within multiphase systems. Employing award winning and patented techniques it measures the absorption of gamma radiation through the process medium. This enables a meaningful and accurate measurement of the vertical density distribution within vessels to be made. -
Page 5: Instrument General Arrangement
2. Instrument General Arrangement A diagram of a single High Temperature detector system is shown below. The Profiler is typically located on a flange at the top of a vessel and consists of 3 main components that make up the outer instrument housing. These are the dip-pipes, neck and dome. -
Page 6: Principle Of Operation
3. Principle of Operation With sources loaded and the arming rod in the open position, the process medium present between the source and detector dip pipes will attenuate the radiation seen by each Geiger Müller (GM) tube within the detector array. This attenuation is related to the density of the intervening material / phase. -
Page 7: Radiation Basics
over a fibre optic cable. The Fibre optic signal is converted to an electrical signal in the main panel using a Fibre optic converter. 4. Radiation Basics Elements such as Americium-241, Caesium-137 and Cobalt-60, which emit ionizing radiation, are known as Radioisotopes. -
Page 8: Alara Principle - Time, Distance, Shielding
All series of Tracerco source holders have a shutter or other mechanism to close off the aperture through which radiation is emitted, or to otherwise isolate the sources. -
Page 9: Radiation Exposure And Radioactive Contamination
In addition, the body’s organs can suffer internal damage through absorption of the radioactive material. However, it must be stressed that Tracerco only utilize sealed, doubly-encapsulated radioactive sources which have undergone stringent type testing and conform to ANSI/ISO standards. The likelihood of contamination from leaked radioactive material is therefore extremely low. -
Page 10: Mechanical Installation
Source Arrays: The source arrays will be shipped in Type ‘A’ containers. The containers should only be opened in the presence of a qualified Tracerco engineer. 5.1.2. Detailed Lifting Procedure for the Tracerco Profiler The detector arrays should be lifted by fixing lifting shackles through the lifting lugs fitted to the titanium flange. -
Page 11: Lifting The Instrument From A Horizontal Position To A Vertical Position
5.1.3. Lifting the instrument from a horizontal position to a vertical position: Following the diagrams below, use a crane appropriately connected to the two eyebolts. An operative should support the end of the dip-pipe while the instrument is lifted in order to avoid excessive strain on the end of the assembly. -
Page 12: Approximate Weights
5.2. Approximate weights: The approximate weight for a 4m long profiler is as follows: 6” 300# dual dip pipe profiler = Approximate 75Kg (165 lb) 8” 300# dual dip pipe profiler = Approximate 85Kg (187 lb) Accurate measured weights can only be supplied once the instrument design is finalized and manufactured. 5.3. -
Page 13: Mechanical Installation (By Site)
5.4. Mechanical Installation (By Site) Ensure that the flange face of vessel nozzle is clean and place the joint gasket on the nozzle flange. Using a suitable lifting hoist and as detailed in sections 6.1.2 and 6.1.3, lift the dip-pipe assembly out of its crate and into position above the vessel nozzle. -
Page 14: Bolt Torquing Procedure
5.4.2. Bolt Torquing Procedure Please refer to project specific pressure vessel calculations for suggested gasket type and bolt torque settings. • All nuts to be capable of being run down their respective bolts by hand. • Ensure threads are suitably lubricated. •... -
Page 15: Radiological Safety
“A” container. This ensures that the sources are safely packed and shielded for transport. When shipped to site, the sources should be kept in a safe area (e.g. Radiographer’s store) until the arrival of Tracerco Services Commissioning Engineers, who will install the source array into its dip-pipe. Prior to arrival of the sources, the site license should be amended to include the additional sources. -
Page 16: Source Housing And Isolation
For source removal, the source housing, lever, locks and screws must all be removed before the arming rod can be retracted from the vessel to alloy removal of the sources. Tracerco recommend this is only performed by a Tracerco engineer. - Page 17 Figure 8 - Source isolation mechanism Isolation Lever Figure 9 - Thumb Screw and Gaiter Thumb screw Rubber Gaiter to prevent water ingress Quick Release Mechanism (Z) MI1028 Rev B...
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Page 18: Arming Rod And Collimator Housing
6.2. Arming Rod and Collimator Housing The arming rod is locked into the collimator tube using a padlock as shown in Figure 10. The arming rod has a slot cut in its length to allow movement of the sources inside the tube thus exposing or isolating the sources. A second locks the collimator to the dip pipe. -
Page 19: Isolation Of Sources
Various hole shapes are allowed in the collimator tube. The diameter of the arming rod, collimator tube and the holes for each source will be different depending on the source capsule type used. However, the operation and arrangement of the various radiological components is the same for all Tracerco Profiler series variations. -
Page 20: Labelling And Safety Marking
Figure 14- Arming Rod and Collimator Section – (Closed Position) 6.4. Labelling and Safety Marking. The profiler has a metal label attached, screwed or tie wrapped (metal type) to the dome. Detailing the Radioactive details of the installation, these Include: •... -
Page 21: Radiological Safety - Ws Variant
Figure 15 - Wired Shutter / Operated profiler Tracerco highly recommend training in removing and assembling of the arming rod mechanism for isolation. As it is possible the sealed dip pipe could be pressurised and incorrect purging could result in an incident. -
Page 22: Vessel Entry
Should the source dip tube be damaged but the outer sheath integrity remains intact, the shutter must not be operated and the local RPA / RPO should be contacted for advice. Tracerco should also be contacted so that a Tracerco Engineer may attend and recover the sources. Until the Tracerco Engineer arrives and if the vessel is open, then remove personnel from the area and secure all vessel openings. -
Page 23: During Installation/Source Removal
‘A’ container and the container moved to a safe area. Where this is not practicable, then the source rod should be laid down and each source removed by the Tracerco Engineer and placed into the Type ‘A’ container for safe storage. -
Page 24: Mechanical Damage To Source
If deemed necessary, contact Radiation Protection Advisor 10. Rules for Disposal Sources must only be disposed of via an authorised route. Tracerco is able to advise on disposal and also provide an Engineer to remove the sources. 11. Leakage Testing A leak test must be performed at least every 6 months in North America or less than two years in other regions of the world. -
Page 25: Maintenance
12. Maintenance Only qualified personnel may carry out any repairs to the radiation source mechanism installation. We advise that Tracerco Services engineers carry out all repairs with respect to these mechanical and radiological components. MI1028 Rev B... -
Page 26: Routine Maintenance/Inspection
Retract the sources, confirm by the profiler HMI indication that the sources are in the retracted position and that the condition changes when the sources are re-armed. Should the shutter resist movement, become stuck or otherwise not operate correctly then Tracerco should be contacted. For technical support contact:-... -
Page 27: Appendix A Isodose Plots
14. Appendix A Isodose plots MI1028 Rev B... - Page 28 MI1028 Rev B...
- Page 29 MI1028 Rev B...
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Page 30: Recommended Bolt Torque Settings
15. Appendix B 15.1. Recommended Bolt Torque settings These values are intended for use as “guidelines only” and are based on the best conditions. ANSI B16.5 BOLT TORQUE (ft.-Ibs) for 7500psi GASKET SEATING STRESS FOR RAISED FACED FLANGES PRESSURE CLASSES NOMINAL 1500 2500... - Page 31 NOMINAL 1500 2500 PIPE CLASS CLASS CLASS CLASS CLASS CLASS SIZE (inch) 1 1/4 1 1/2 2 1/2 3 1/2 1390 1248 1247 2374 1230 3415 1732 1003 1178 2176 1427 1712 3111 1093 1396 2062 3859 1055 1374 1588 1321 1626 2007...
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Page 32: Appendix C - Isolation Of Wired Shutter / Wire Operated Mechanism
16. Appendix C – Isolation of Wired Shutter / Wire operated mechanism Typical Isolation Procedure, Cable operated Profiler Isolation of source rod is required before any personnel can enter Kristin Vessels during maintenance. Please note the internal vessel areas will still be classified as a controlled area, barriers and signage should be clearly identified by site RPS. - Page 33 Check the pressure on gauge located on the head of the profiler. E nsure the swagelok valve V 1 at the top of the dip pipe is opened to give an accurate reading of the dip pipe pressure. Pressure indication should be zero if the vessel is shut down and drained, If V1 is open during operation a small pressure will be present on the gauge as the pressure will increase due to the temperature rise of the vessel, this rise should not be approaching vessel operating pressure, if vessel operating pressure is shown on the gauge then the system must be...
- Page 34 Remove “O”-ring and vector seal and store with valve / gauge assembly and store with maintenance supervisor. 6. Install source rod actuating lever onto to Profiler, attaching the tip to the wire rope end coupling. Fasten all necessary bolts. (Lever should be retained with the profiler even when not fitted, it is suggested that it is stored inside of the dome secured to avoid movement).
- Page 35 SAND 10. Before entering vessel, using a Tracerco T-202 radiation monitor or a suitable alternative, survey vessel ensuring source is locked out. The dose rate at the designated barrier should not exceed 7.5 microSeiverts , RPS should ensure barriers are erected and controlled area identified.
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