Seals & Covers
Easy to install
No RTV Type Sealants
No Post-use cleanup
Reliable Sealing time after time
Reusable Seal
- Sand Box Covers with "Quik-Bolts"
- NI Box Covers with "Quik-Bolts"
- Inspection Hatch Covers
- ERCD Covers with "Quik-Bolts"
- Ex Core & Blow Out Covers
These, and the several type of covers listed above, use an engineered gasket system in conjunction with our Quik-Lok® Cam Bolts or Nuts. The system can be designed around existing Covers to reduce costs. The System results in a fast, reliable, and leak-tight installation for traditionally troublesome leak paths - Fuel Transfer Tube Closure Systems
This design uses Preferred's unique Quik-Lok® Toggle Bolt. These high-strength quick-throw cam fasteners are coupled with an engineered dual gasket system. Together, the Closure System replaces the standard 20-24 bolts with 4 Toggles. The completed system can be leaktested between the seals to assure proper installation. The result is a dramatically reduced Fuel Transfer Cover installaton time with reduced dose.
Preferred Engineering developed the compressive rubber type cavity seal in 1988. We were the first to develop the Seal System that requires no compressed air to maintain the seal. In addition to increased sealing effectiveness, the Seal System offers a reusable seal, reduced installation time and dose, and reduced radwaste costs.
Features
- Proven Design - In service at more than 15 units
- Passive Sealing - requires no air lines
- Sectional Design - the Seal System is divided into several sections to permit easy handling
- Inherently Safe - Once Preferred's RPV Cavity Seal is locked in place, the Seal cannot be dislodged
- Damage Resistant / Rugged Construction - Seal Cover Plates provide additional protection to the Seal thereby reducing the potential for damage
Benefits
- Long Life Seal - reusable for a minimum of three outages
- Reduced Contamination - The Cover Plates and Toggle Bolts are electropolished to facilitate decontamination
- Simplified Installation - A complete installation can be made in less than one hour
Vessel Covers
- Temporary RPV Cover/Seal (25 FT Head)
The Cover allows isolation of the RPV while maintaining a full cavity of water. The Cover contains two diverse and passive sealing elements. Testing capabilities are included to permit a full evaluation of the seal prior to drain-down.
- RPV Isolation Cover (Low Head)
The RPV Isloation Cover is a BWR version of the Cover described above. Because of its' size the Cover consists of two or more sections that are fastened together.
- Other Related Products
- RPV Internals Storage Pool Gate
- Spent Fuel Cooling Suction Covers