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Summary of Contents for Vega SHLD1
- Page 1 Quick setup guide SHLD1 Source holder Document ID: 62092...
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Page 2: Table Of Contents
Principle of operation...................... 10 Mounting ..........................13 General instructions ....................... 13 Mounting instructions ..................... 14 Setup ............................21 Operation of SHLD1 ....................... 21 5 Maintenance and fault rectification ..................24 Cleaning ......................... 24 Maintenance ........................24 Test of the switching mechanism ..................25 Tightness test ......................... -
Page 3: For Your Safety
Time: Stay as short a time as possible in radiation exposed areas. Distance: Your distance to the source should be as large as possible. The local dose rate of the radiation decreases in proportion to the square of the distance to the radiation source. SHLD1 • Source holder... -
Page 4: Appropriate Use
When measuring aggressive or corrosive media that can cause a dangerous situation if the instrument malfunctions, the operator has to implement suitable measures to make sure the instrument is functioning properly. During the entire duration of use, the user is obliged to determine the compliance of the necessary occupational safety measures with the SHLD1 • Source holder... -
Page 5: Application Reference
This information is only valid for USA and Canada. Hence the follow- ing text is only available in the English language. Installations in the US shall comply with the relevant requirements of the National Electrical Code (ANSI/NFPA 70). SHLD1 • Source holder... -
Page 6: Safety Instructions For Ex Areas
Instruments with approvals can have different technical data de- pending on the version. With these instruments, the corresponding approval documents must be observed. These documents are part of the scope of delivery or can be downloaded from "www.vega.com", "Instrument search (serial number)" as well as via "Downloads" and "Approvals". The suitability of the radiometric measuring principle as well as of the instrument for use in hazardous areas must be checked by the opera- tor by consulting the applicable national regulations. -
Page 7: Product Description
Article number - Documentation • Note: "Highly radioactive source" (if necessary) The serial number allows you to access the delivery data of the instru- ment via "www.vega.com", "VEGA Tools" and "Instrument search". Note: The local dose rate stated on the type label at a defined distance is safety-oriented and includes production-related fluctuations of the emitters as well as tolerances of the measuring instruments. There can thus be deviations in the local dose rate calculated with the speci- fied attenuation factors. See also "Principle of operation/Source". - Page 8 2 Product description Fig. 2: Versions SHLD1 (Overview) Version A: Standard version Version B: with position switch Version C: with Interlock safety switch Version D: Heavy Duty version Version E: version with pneumatic switching mechanism Version F: version with pneumatic switching mechanism and position switch...
- Page 9 2 Product description Type labels Fig. 3: Position of the type labels Type label - Source Type label - Source holder Shipping information USA (optional) Warning USA (optional) SHLD1 • Source holder...
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Page 10: Principle Of Operation
Certificate of the source capsule (optional) Move to "www.vega.com" and enter in the search field the serial number of your instrument. Alternatively, you can access the data via your smartphone: • Download the VEGA Tools app from the "Apple App Store" or the "Google Play Store" • Scan the Data Matrix code on the type label of the instrument or •... - Page 11 The source holder shields the environment against gamma radia- tion and protects the radioactive source from mechanical damage or chemical influences. In case of large measuring ranges (e.g. with high vessels) two or more source holders are used. The SHLD1 consists of the components: Fig. 5: Source holder SHLD1 Source holder Switchover/locking mechanism...
- Page 12 2 Product description Attenuation factor and half-value layers Cs-137 Attenuation factor Number of the half-value layers Tab. 2: Attenuation factor and half-value layers SHLD1 • Source holder...
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Page 13: Mounting
3 Mounting Mounting General instructions • General information For mounting of SHLD1 you need a special handling permit. • Mounting may only be carried out by authorized, qualified person- nel who are monitored for radiation exposure according to local laws or the handling permit. Take note of the specifications in the handling permit. Also take the local conditions into account. -
Page 14: Mounting Instructions
There are large spacings and gaps between measuring frame and conveyor belt. If there are gaps or empty spaces around the installation, provide protective fences or grids to keep hands away from the dangerous area. Such areas must be marked accordingly. The arrangement of the source holders depends on the width and the loading height of the conveyor belt. In case of wide conveyor belts, SHLD1 • Source holder... - Page 15 The source holder SHLD 1 should be mounted as close as possible to the vessel. However, with large measuring ranges and small vessel diameters, a gap can often not be avoided. If there are gaps or empty spaces around the installation, provide protective fences or grids to keep hands away from the dangerous area. Such areas must be marked accordingly. SHLD1 • Source holder...
- Page 16 Such areas must be marked accordingly. The ideal measurement setup for density measurement is installation on a vertical pipeline. The pipe diameter should be at least 50 mm (1.97 in). Flow direction should be from bottom to top. SHLD1 • Source holder...
- Page 17 Fig. 9: 30° measurement setup on a pipeline with diameter 50 … 100 mm (1.97 … 3.94 in) Vertical pipeline, diameter 50 … 600 mm (1.97 … 23.62 in) For pipe diameters 50 … 600 mm (1.97 … 23.62 in), a straight radia- tion path is possible. The radiometric sensor can be mounted either horizontally or vertically. SHLD1 • Source holder...
- Page 18 (1.97 … 23.62 in), detector mounted vertically Source holder (SHLD 1) Radiometric sensor (MINITRAC) Radiated area Mounting bracket Avoiding stray radiation - Vertical pipeline, diameter 50 … 600 mm (1.97 … 23.62 in) When mounting the radiometric sensor horizontally, the optional lead shielding is recommended in order to avoid influence from secondary radiation sources. SHLD1 • Source holder...
- Page 19 Source holder (SHLD 1) Radiometric sensor (MINITRAC) Radiated area Mounting bracket Horizontal pipeline On a horizontal pipeline, the radiation should be directed horizontally to avoid interference from air pockets. Fig. 12: Measurement setup on a horizontal pipeline Source holder (SHLD 1) Radiated area Detector (MINITRAC) SHLD1 • Source holder...
- Page 20 Such stray radiation must be shielded off with additional lead or steel sheets. All control and off- limit areas must be rendered inaccessible and provided with warning signs. Behaviour with empty vessel Caution: After technically correct mounting, the control area around an empty vessel must be measured for radioactivity and if there is any, the area must be cordoned off and marked. Possible ways of access to the inside of the vessel must be reliably closed off and marked with a warning sign "Radioactive". The responsible radiation safety officer can allow access after having checked the safety measures with switched-off source holder. If work must be carried out in and on the vessel, it is absolutely neces- sary to switch off the radiation on the source holder. SHLD1 • Source holder...
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Page 21: Setup
2. Screw out safety screw (3) (screw is undetachably fixed to the safeguard cable) 3. Turn the operating lever 90° clockwise up to the stop. "ON" (1) will then appear in the position recess of the operating lever. 4. Secure the operating lever in position "ON" (1). SHLD1 • Source holder... - Page 22 The safety switch itself must be provided by the customer. The safety bolt of the interlock switch must have a diameter of 16 mm (e.g. Superior Interlock type B-4003). The mounting plate has the following holes: SHLD1 • Source holder...
- Page 23 4 Setup 116 mm (4.57") 63,5 mm 53 mm (2.50") (2.08") 19 mm (0.75") ø 8,25 mm (0.32") Fig. 15: Drilling template of the interlock safety switch A Mounting plate for the interlock safety switch SHLD1 • Source holder...
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Page 24: Maintenance And Fault Rectification
Measures in case of cor- If there are clear traces of corrosion on the source container, the local rosion dose rate (µSv/h) must be measured in the surroundings. If the rate is clearly above the values during normal operation, then the area must be cordoned off and the responsible radiation safety officer informed. Corroded instruments and lock washers must be exchanged as soon as possible. SHLD1 • Source holder... -
Page 25: Test Of The Switching Mechanism
In case of corrosion: Follow the instructions in chapter "Mainte- nance/Measures in case of corrosion". Tightness test The tightness of the source capsule must be checked at regular inter- vals. The frequency of the tightness test (wipe test) must correspond to the specifications of the authorities or the handling permit. SHLD1 • Source holder... - Page 26 Take wipe samples from at least the following locations: • On the groove beneath the cover plate • On the lower edge of the mounting surface • Along the groove between operating lever and housing • On the groove beneath the bearing flange SHLD1 • Source holder...
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Page 27: Rectify Faults
The engineer on duty will call you back. What to do in case of emergency Immediate measures The emergency procedure described here must be applied immedi- ately in the interest of the safety of the staff, in order to secure an area in which an unshielded radiation source exists or is assumed to exist. SHLD1 • Source holder... - Page 28 The time required for transport should be estimated and optimized in advance through tests and training. • Informing the responsible Pass all necessary information immediately on to the responsible authority local and national authorities • After a thorough investigation of the situation on site, the respon- sible radiation safety officer must agree, together with the local authorities, on appropriate corrective measures for the existing problem Note: National regulations can prescribe deviating procedures and notifica- tion requirements. SHLD1 • Source holder...
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Page 29: Supplement
Source and vessel characteristics Source Cs-137 Attenuation factor F of the source holder 46 Number of half value layers of the source holder Max. activity of the source max. 3.7 GBq (100 mCi) SHLD1 • Source holder... - Page 30 Notes SHLD1 • Source holder...
- Page 31 Notes SHLD1 • Source holder...
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Page 32: Information
Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2019 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...
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