Nut & Washer Handling Tool (NWHT)
The Biach Nut and Washer Handling Tool (NWHT) is designed to provide ease of operation in removing or installing RPV nuts and washers after detensioning or prior to tensioning the studs. It is designed to be operated by one man thereby reducing crew requirements and collective dose associated with these tasks.
Features:
- Trolley Assembly
- Compact Nut/Washer Capture Assembly
- Horizontal (X) and Vertical (Y) Positioning Assemble
- Safety Interlocks
- Laser Alignment System
- NWHT attaches to I-Beam of Biach Nut Rack
- Control Box with Selector Switches, Gauges and
- Filter/Lubricator
- Completely Independent Operation From Tensioner Handling System
NWHT Operational Sequence:
1. Operator positions NWHT over stud and nut utilizing laser alignment.
2. NWHT is lowered over stud and nut until it rests on top of nut.
3. Operator engages nut drive
4. Operator engages washer gripper
5. Turn selector switch to begin threading
6. Raise NWHT with captured nut and washer
7. Position NWHT over holder in nut rack utilizing laser alignment system
8. Lower nut and washer onto holder
9. Release nut and washer
The NWHT is now ready to move on its trolley to the next stud location. Installation is simply the reverse of the above.
Typical Sequence Duration: 1.5 minutes per Stud/Nut Location
Benefits:
- Crew reduction: One man operation
- Safety: Operator is not subjected to torque
- Reduced dose: Operator does not contact stud, nut or washer
- Time Savings: Task performed simultaneously with detensioning
- Low Maintenance: Simplicity of design reduces required maintenance
Biach Industries, Inc., 75 Chestnut Street, P O Box 280, Cranford, NJ 07016. Tel: 908-276-3110; Fax: 908-276-0815.