THE MOST EFFICIENT GAMMA HARDENED LED LIGHTS
DEVELOPED AND MANUFACTURED BY:
GAMMA HARDENED LED LIGHT testing in TRIGA MarkII
reactor in IJS (Institut Jozef Stefan) in LJUBLJANA - SLOVENIA
Industry exhibition SLOVENIA @CERN
9 - 10 october 2019
Company Nanocut co. ltd. joined this exhibition, which was organized by SPIRIT Slovenia.
In Cern, we presented our LED lighting for radioactive environments, which could be used inside the Cern accelerator for many years without damage. In high radiation areas, standard electronics can only survive for a few minutes.
Light and Building fair 2018
Between 18. and 23. march we made a successful exhibition of our company and our products on the Light and Building fair 2018 in Frankfurt, Germany.
We were surprised to encounter a lot of demand from designers of electronic devices in nuclear power plants on a universal fair such as Light and Building. They told us, that they have been thinking how to embed a more economical LED lighting solution on areas, where there is increased radioactive radiation. Until now, only incandescent light bulbs or standard fluorescent lamps without electrical ballast could be used in such areas.
Check out our catalogue of the exhibited products.
Standard Gamma Products
GAMMA radiation hardened LED lights " LUMINOS Nuclear " are made of materials which can survive gamma radiation of up to 16 KGy. Luminos Nuclear products are especially designed to replace inefficient lighting in nuclear power plants. All luminaire components including the LED driver were tested in Triga Mark II reactor in Institute Jožef Stefan in Slovenia. All other testing was done in SIQ Ljubljana, also in Slovenia.
Linear Gamma LED luminaires are the most efficient substitute to fluorescent lamps. Power consumption is 2 - 3x less than standard fluorescent bulbs. When designing this luminaire, we decided to use the best possible materials and components. With advanced LED chips (< 210 lm/W), aluminum housing, tempered glass and other high quality components, this LED luminaire is designed to last. After accounting for losses in glass, LED driver and optics, the overall efficiency of this luminaire is around 155lm/W.
In addition to standard dimensions, we can also design this luminaire to customer specific dimensions and desires. Distribution angle of illumination can be 20°, 30°, 60° or 90° and power between 20 - 80W. Montage systems can also be adjusted
LED Flat Line/Gamma luminaires are among the most energy efficient LED lights. They are used to illuminate various indoor spaces such as technical premises, production premises, offices, warehouses or any area, where they are exposed to gamma radiation up to a gamma dose of 16KGy. We recommend that this model is mounted 3 - 6m high, with flux distribution angle 120°, and up to 12m high with flux distribution angle 60°.
The luminaires have outstanding energy efficiency due to the use of the most advanced LED light sources, high efficiency LED driver and carefully selected other components. They are also distinguished by their 100% resistance to burns of a single LED light source, a large redundancy of power modules and a robust aluminium profile dyed with high-quality polyurethane varnishes. All other electronic characteristics are similar to the model STR ULTRA.
The Gamma Hardened Stadion LED Reflector is suitable especially for high mounting in areas such as SFDS (spent fuel dry storage area), containment building in nuclear power plants and on high towers around the nuclear power plant. This model can be an indoor and an outdoor version. For the outdoor version we recommend the IP66 option.
This model has LED diodes with efficiency of around 190 lm/W. After all the losses inside the LED luminaire and the LED driver, we get a luminous flux of 160 lm/W out of the LED reflector.
For OEM montage system, customers need to provide us with schematics. The original montage is a hanging type on two points with prepared 9 mm holes.
Just as all the other luminaires, these can also be used as radiation hardened LEDs. In practice, we sell most of ceiling recessed luminaires as ambient lights for office spaces, corridors and toilet premises. The LED driver is mounted outside the luminaire and can therefore be in standard or in radiation hardened option.
STR ULTRA Gamma Hardened LED reflector is in the category of most energy-efficient LED reflectors on the market. It is used to illuminate large outdoor areas. It is specially developed for use in a low, medium and high radiation areas, like WMB (Waste Management Buildings), waste storage buildings.
STR ULTRA/GAMMA reflector can be mounted from 8 m up to 30 m high. In addition to exceptional energy efficiency due to the use of the most advanced LED light sources and the best possible nanotechnology optics with reflection of 98 %,
this LED luminaire also features 100% resistance to burns of a single LED light source, a large redundancy of LED driver and quality aluminium housing with powder painting. The lifetime is more than 20 years and warranty time is 5 - 10 years.
This LED reflector has very high luminous flux for its dimension and weight, thanks to special Aluminium cooling profile. Because of the small dimensions (320x210x130mm), this luminaire is also used as an accessory in fire trucks...
FOCUS/GAMMA reflector has the same optics as the STR ULTRA. Because of a better cooling system, the connection power can be from 100 W up to 200 W. The outside dimensions are only 310 x 210 x 130 mm. On customers request, this model can be built to any dimension and power, thanks to the standard cooling elements, which can be multiplied in width and length. We already built a 1000 W LED reflector, with luminous flux of more than 140.000 lm.
The mounting system can be customized. Different optics angles can also be made on customers request.
LED driver tests on the effects of gamma radiation were done in the TRIGA reactor of the Jožef Stefan Institute in Podgorica near Ljubljana.
The test lasted about 33 hours. During that time, the total dose of gamma radiation was 16kGy, at a dose rate of 300 - 600 Gy/h.
Test Reports on GAMMA radiation
GAMMA Radiation testing in TRIGA Mark II reactor
LED Driver ready for testing inside TRIGA Mark II CORE
DEWESOFT (https://www.dewesoft.com/) measuring system for electric parameters measurements, during LED driver testing inside core TRIGA Mark II reactor.
Testing is done when the reactor is shut down. LED driver is in the middle of the reactor core, while the LED lamp is outside. Components of the LED lamp were tested separately. DEWESOFT measuring system is making measurements of electrical parameters 500 times per second and notes the measured averages every minute in a table.
OTHER TEST REPORTS
OUR FUTURE ACTIVITY
is to improve our LED radiation hardened luminare.
- In year 2018 we are going to start testing our LED hardened light up to gamma dose of 100 - 500 KGy with the presence of high newtron flux. As we already tested components separately, we expect good results.
- In year 2019 - 2021 we plan to work on gamma radiation glass resistance testing. Our plan is to find glass which can be tempered and laminated and will not get brown color after exposing it to gamma rays.
Company Nanocut co.ltd. was established in 2014.
In the first two years we were developing, manufacturing and selling many different LED light models. These products with some installation pictures can also be seen on our Nanocut company website www.luminos.si . Thanks to our knowledge of switch mode power supplies (SMPS), we started developing our own LED driver, carefully choosing standard components. After our cooperation with Slovenian Institute Jožef Stefan, where they run the TRIGA Mark II reactor, we finished the testing of our LED driver on gamma doses up to 16 KGy.
We've also been testing all the components and different models of power supplies for more than two years to get good results. In the end, our LED driver survived for 33 hours inside the TRIGA reactor core, at gamma dose rate of 300-600 Gy.
Engineers in our company have more than 35 years of experience SMPS and more than 20 years of experience in mechanical engineering construction. All this knowledge and experience was needed, because the gamma radiation hardened LED luminaire is not a simple product. We are using our own technology called "DERCCAT". Product developed with this technology must be carefully designed using extensive knowledge of seven physical properties. Diffusion, Emission, Reflection, Conduction, Convection, Absorption and Transparency. All these physical properties have effect on heating, efficiency and LED luminaire lifetime.
The same LED driver, which can survive high gamma doses, is used in all of our gamma resistant LED lighting products. We can also develop gamma radiation hardened LED luminaires with custom dimensions. The LED driver technology belongs to our company. All other mechanical parts are also developed and manufactured in our company.
Three pictures show LED reflectors STR ULTRA on 30m high towers. All together 40 LED reflectors were installed on 6 towers. Complete connecting power 5.4 KW, covers an area of 20000 m2. Avarage luminance level on the ground is 28 lx.
Many of our other LED lamp installations can also be seen on our main company website www.luminos.si
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Nanocut co. ltd.
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