Nukleer santralda reaktor kontrol, guvenlik sistemleri ve instrumentasyon icin 100+ km kablo kullanir. 1975 Browns Ferry yanginda mum ile kablo penetrasyon testi cok siki yangin cikardi. NFPA 805 (Performance-Based Standard for Fire Protection for Light Water Reactor Electric Generating Plants) risk-informed yangin koruma tasarimi sunar.
Browns Ferry 1975 Yangini
- TVA Alabama Browns Ferry Unit 1
- Elektrikci kablo penetrasyon test icin mum kullandi
- Polyurethane dolgu tutustu
- 7 saat yangin, 2000 kablo hasarli
- Reaktor guvenli sekilde shutdown
- NRC Appendix R yangin koruma kurallari dogdu
NFPA 805 Risk-Informed
- Performance-based: Deterministic + PRA (Probabilistic Risk Assessment)
- Core damage frequency: <1E-4/yr hedef
- Safe-shutdown: Minimum 2 bagimsiz guzergah
- Single-fire area: Bolum kaybında reaktor guvenli
- NRC onay: Uygulama oncesi lisans amendment
Kablo Tray Koruma Yontemleri
- Ablative kaplama: Flamemastic, Chartek 1 saat rating
- Rock-wool jacketing: Rockwool Conlit 150 mm
- Fire wrap: 3M FS-195, 1-3 saat rating
- Dedicated sprinkler: NFPA 13 OH2 0.20 gpm/ft2
- IEEE 634: Flame test qualifying (20 dk)
LSZH Kablo
- Low Smoke Zero Halogen: PVC yerine
- IEC 60332-3: Flame propagation test
- IEEE 383: Qualification for Type I flame test
- IEEE 1202: Cable tray FT4 70kW flame
- Smoke density: NES 713 Toxicity Index <1
Penetration Seal
- UL Listed: XHHW sistemi (3M, Hilti)
- 3-saat firewall: 3 hour penetration seal
- Ozon/radyasyon: 40 yil yaslandirma testi
- Post-accident: LOCA (Loss of Coolant Accident) sonrasi integrity
- Installation QA: Her seal icin dokuman + foto
Nukleer Koruma SprinkCalc ile
SprinkCalc nukleer santral kablo tray sprinkler yogunlugu, ablative kaplama ve penetration seal analizi yapar.
SprinkCalc'i App Store'dan indir
Kaynaklar & İleri Okuma
NFPA 805, NRC 10 CFR 50 Appendix R, IEEE 383, IEEE 634, IEEE 1202, NUREG-1805. NFPA 805 Nuclear Fire Protection kodu.