Epoxy resin insulated cable penetration modules for refurbishment of PGKK EPAs
New cable penetration modules
In 2008 VISOLA Ltd extended its well proven electrical penetration product range. A new sort of penetration family and a suitable installation technology were introduced. A two year long R&D work resulted in an innovative product which fully complies with the new requirements of Paks NPP regarding the refurbishment of obsolete Soviet design electrical penetrations on site. Instead of complete replacement of an electrical penetration assembly (EPA) a rational refurbishment has been implemented which updates the technical parameters of old EPAs at a reasonable price. The new technology is in accordance with the ambitious plan for extension of service time of NPP in Hungary.
Combining the recently developed penetration modules with well proven gamma radiation screening products a competitive EPA family is available for a broad range of NPPs.
Refurbishment of EPAs on site
The main steps of an on site refurbishment of EPAs are demonstrated by drawings below.
Figure 1: The old PGKK type EPA as installed, with original modules
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1 = old modul 2 = old cable 3 = casing tube 4 = bulkhead 5 = screening 6 = concr. wall |
Figure 2: The casing tube of EPA after removing obsolete modules
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Figure 3: Stainless steel flanges installed on renovated bulkheads. Leakage test
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7 = new flange 8 = pressure gauge |
Figure 4: Installation of new modules and cables into casing tube. New cable junction boxes
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9 = new module 10 = new cable 11 = cable junction box |