File:Demolition of P Reactor Stack at SRS (5107459011).jpg
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Summary[edit]
DescriptionDemolition of P Reactor Stack at SRS (5107459011).jpg |
October 23, 2010, the Department of Energy’s Savannah River Site (SRS) removed two exhaust stacks from the Site’s P & R reactors. With less than 40 pounds of dynamite and in a matter of seconds, the two 145-foot tall, 700-ton stacks that have towered over the P and R Reactors for more than 50 years came down. The demolition is part of an American Recovery and Reinvestment Act project that is decommissioning the two Cold War era reactors. This $185 million Recovery Act demolition project is part of in situ, or in-place, decommissioning of the two reactors, a Recovery Act Program managed by Savannah River Nuclear Solutions (SRNS), the SRS management and operations contractor. The project employed 108 people to complete the stack demolition. The rubble from the stacks will be placed below grade and grouted in place at each of the reactors. In preparation for the demolition, SRNS modified the base of each stack to create “columns” into which they will drill 80 15-inch-deep horizontal holes for explosive loading. The explosive charge was initiated by nonelectric detonators ranging in time from 25-200 milliseconds to assist in controlling the rate and direction of the fall of each stack. Seismographs where used in the immediate area to monitor the vibration and air blast generated by the demolition. The P Reactor stack fell first, followed by the R Reactor stack. A video of the demolition is available [here]. The demolitions were performed by Controlled Demolition, Inc. (CDI), the contractor that also felled the 52-million-pound, 450-foot-high and 345-foot-wide K Cooling Tower in May. In the ongoing phase of in situ decommissioning, the reactors’ underground structures will be filled with an estimated 260,000 cubic yards of concrete grout. This will seal the structures and leave them safely intact for an estimated 1,400 years. The reactor buildings themselves will have little or no maintenance performed on them in the future. While the reactors were operational, the P and R reactor stacks were used as the outlet for the exhaust from the reactor buildings. R Reactor was shut down in 1964, and P Reactor was shut down in 1988. If left in place, the height and configuration of the reactors’ exhaust stacks could pose serious risk due to degradation and possible collapse in the future. Removing them mitigates that risk. |
Date | |
Source | Demolition of P Reactor Stack at SRS |
Author | Savannah River Site |
Licensing[edit]
This image was originally posted to Flickr by Savannah River Site at https://flickr.com/photos/51009184@N06/5107459011 (archive). It was reviewed on 19 November 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
19 November 2018
Public domainPublic domainfalsefalse |
This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
Please note that national laboratories operate under varying licences and some are not free. Check the site policies of any national lab before crediting it with this tag. العربية ∙ English ∙ français ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ русский ∙ українська ∙ Tiếng Việt ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:04, 19 November 2018 | 3,072 × 2,041 (2.63 MB) | Tyler ser Noche (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D300 |
Author | Bruce Boulineau |
Exposure time | 1/500 sec (0.002) |
F-number | f/11 |
ISO speed rating | 400 |
Date and time of data generation | 09:00, 23 October 2010 |
Lens focal length | 48 mm |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | Adobe Photoshop CS3 Windows |
File change date and time | 10:09, 23 October 2010 |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 09:00, 23 October 2010 |
APEX shutter speed | 8.965784 |
APEX aperture | 6.918863 |
APEX exposure bias | 1 |
Maximum land aperture | 4.4 APEX (f/4.59) |
Metering mode | Pattern |
Light source | Fine weather |
Flash | Flash did not fire |
DateTime subseconds | 55 |
DateTimeOriginal subseconds | 55 |
DateTimeDigitized subseconds | 55 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 72 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Image width | 3,072 px |
Image height | 2,041 px |
Serial number of camera | 3047890 |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Rating (out of 5) | 5 |
Date metadata was last modified | 06:09, 23 October 2010 |