Safety Grounding Approach for the National Ignition Facility Power Conditioning System
This paper describes a set of analyses and tests performed to evaluate approaches to provide a safe and robust grounding approach for the main Power Conditioning System (PCS) in the National Ignition Facility (NIF) facility presently under construction at the Lawrence Livermore National Laboratory (LLNL). The Power Conditioning System consists of up to 192 capacitor bank modules, each storing 2.2 MJ and capable of producing a peak current over 500 kA. The grounding system must minimize touch potentials associated with operation of the Power Conditioning System. In the event of severe faults, the system must assure that the energy delivered to a person through contact with ''grounded'' structures is very low. Based on computer modeling and low-voltage, low-current tests, we have concluded that the most effective approach is a set of metal enclosures around the output cables (effectively heavy-wall closed cable trays) extending from the capacitor bank modules to their flashlamp loads. This paper will discuss the safety standards identified for this application, the approach to meeting the standards, and the predicted performance of the safety system.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15006514
- Report Number(s):
- UCRL-JC-144235; TRN: US0400841
- Resource Relation:
- Journal Volume: 2; Conference: PPPS-2001 13th IEEE PPC 28th Institute of Electrical and Electronics Engineers, Inc. International Conference on Plasma Science and 13th Institute of Electrical and Electronics Engineers Inc. International Pulsed Power Conference, Las Vegas, NV (US), 06/17/2001--06/22/2001; Other Information: PBD: 14 Jun 2001
- Country of Publication:
- United States
- Language:
- English
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