Loose Tube Cables for Nuclear Power Plants

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Loose tube cables are the preferred design for cables installed outdoors, in ducts, trenches or overhead. With up to 12 optical fibers in each loose tube, these cables are ideally suited for high fiber count “backbone” or trunking applications. Depending on the materials, loose tube cables meet a variety of flame tests, including IEEE 383 and UL 1666.

CableLAN Nuclear will be happy to provide you with more information about these cables. Call or email us!

Basic Construction

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The optical fibers are enclosed within a hollow thermoplastic tube and each tube is filled with a moisture resistant gel or powder to prevent water damage to the fiber. Any number of loose tubes are combined under a common outer jacket. The cable materials depend upon the required flame rating.

Loose tube cables can contain up to 288 optical fibers. Two versions of loose tube cables are manufactured specifically for nuclear power plants, using any fiber type – 62.5/125, 50/125 (standard performance), 50/125 (10 Gigabit Ethernet performance) and single mode. These fibers are specially made for enhanced radiation resistance. Neither cable type uses PVC materials.

The cables are manufactured by Prysmian under NQA-1 and 10CFR50, Appendix B quality assurance programs. We welcome your review or audit of our facilities and processes.

S779L Series
S5014L
Loose Tube Cables
PVC-Free
IEEE 383 flame
UL 1666 flame
Up to 216 fibers

Prysmian’s S5014L series of loose tube cables are manufactured to meet the flame test requirements of IEEE383 and UL 1666 (riser) . These LSZH (PVC-free) cables provide a high level of flame resistance. The gel-free construction makes installation and termination easier and faster.

S5014L Cables – Weights and Dimensions
  Minimum Bend Radius  
  Outside Diameter Weight Short Term Long Term Max. Load (Installation)
Part Number Fiber mm in kg/km lbs/M cm in cm in Newtons lbs.
S5014L-06-XXY 6 9.9 0.39 91 61 19.3 7.8 9.9 3.9 2700 600
S5014L6-12-XXY 12 9.9 0.39 91 61 19.3 7.8 9.9 3.9 2700 600
S5014L6-24-XXY 24 9.9 0.39 91 61 19.3 7.8 9.9 3.9 2700 600
S5014L12-48-XXY 48 11.5 0.45 119 80 22.9 9.0 11.5 4.5 2700 600
S5014L12-60-XXY 60 11.5 0.45 119 80 22.9 9.0 11.5 4.5 2700 600
S5014L12-72-XXY 72 11.5 0.45 119 80 22.9 9.0 11.5 4.5 2700 600
S5014L12-96-XXY 96 13.0 0.51 153 108 26.1 10.3 13.0 5.1 2700 600
S5014L12-144-XXY 144 16.4 0.65 254 171 32.3 12.9 16.4 6.5 2700 600

S779L Series
PVC-Free
LSZH
IEEE 383 flame
UL 1666
Up to 216 fibers
Prysmian’s S779L series loose tube cables are manufactured to meet the flame test requirements of IEEE 383. Completely non-halogenated, these PVC-free LSZH cables are used extensively in nuclear power plants around the world.

S781L Cables – Weights and Dimensions
  Minimum Bend Radius  
  Outside Diameter Weight Short Term Long Term Max. Load (Installation)
Part Number Fiber mm in kg/km lbs/M cm in cm in Newtons lbs.
S779L-06-XXY 6 10.7 0.42 104 70 21.4 8.4 10.7 4.2 2700 600
S779L6-12-XXY 12 10.7 0.42 104 70 21.4 8.4 10.7 4.2 2700 600
S779L6-24-XXY 24 10.7 0.42 104 70 21.4 8.4 10.7 4.2 2700 600
S779L12-48-XXY 48 11.9 0.47 129 87 23.7 9.3 11.9 4.7 2700 600
S779L12-60-XXY 60 11.9 0.47 129 87 23.7 9.3 11.9 4.7 2700 600
S779L12-72-XXY 72 11.9 0.47 129 87 23.7 9.3 11.9 4.7 2700 600
S779L12-96-XXY 96 14.6 0.58 198 133 29.3 11.6 14.7 5.8 2700 600
S779L12-144-XXY 144 19.3 0.76 357 240 38.7 15.2 19.3 7.6 2700 600
Optical Fiber
All CableLAN Nuclear fiber optic cables are available with any type optical fiber, or in hybrid versions that combine two or more fiber types in one cable. Simply replace the -XXY in the part number with the glass code below. Please call for hybrid (copper and fiber elements in a common jacket) part numbers.

Glass Type Code
(XXY)
Radiation Resistant Operating
Wavelength
(nm)
Min. OFL*
Bandwidth
(MHz-km)
Max.
Attenuation
(dB/km)
1 Gigabit
Ethernet
Link Length
(meters SX/LX**)
10 Gigabit
Ethernet
Link Length
(850 nm)
62.5/125 62N3 Y 850/1300 200/600 3.50/1.25 220  
62.5/125 62X N 850/1300 200/500 3.50/1.25 275/550 8
50/125 50RH Y 850/1300 500/500 3.50/1.50 550/550 82
50/125 OM2 N 850/1300 500/500 3.50/1.50 550/550 82
50/125 OM3RH Y 850/1300 1500/500 3.50/1.50 1000/550 300
50/125 OM3 N 850/1300 1500/500 3.50/1.50 1000/550 300
Singlemode 010RH Y 1310/1550   0.40/0.30    
Singlemode 010X N 1310/1550   0.40/0.30    
Other fiber types (200/230, 100/140) and performance levels are available. Call for information