ML19306A014
| ML19306A014 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Ginna |
| Issue date: | 02/16/1984 |
| From: | Curtis R NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Benaroya V, Butler W, Kniel K Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19270C231 | List: |
| References | |
| NUDOCS 8404100062 | |
| Download: ML19306A014 (2) | |
Text
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NUCLEAR REGULATORY COMMISSION a
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FEB If MM MEMDRANDUM FDR: Victor Benareya, Chief Chemical Engineering Branch, NRR Walter Butler, Chief Containment Systems Branch, NRR Karl Kniel, Chief Generic Issues Branch, NRR Vincent Noonan, Chief Equipment Qualification Branch FROM:
Robert T. Curtis, Chief Containment Systems Research Branch, RES
SUBJECT:
" CABLE R SPONSE DURING THE HYDROGEN BURN-DEMONSTRATION TEST AT THE NEVADA TEST SITE" As you are aware, the hydrogen combustion demonstration program at the Nevada Test Site was recently ccmpleted. During the second chase of this test program safety related equipment was exposed to the hydrogen burn trvirr. ment. The objective of these experiments was to assess the survivability of equipment under conditions outlined in the final hydrogen rule. A key objective was to provide a data base for closure on the issue of survivability of equipment in a large dry containment. The purpose of this memorandum is to provide you with some preliminary observations on the response of a specific type of equipment (cables) during these tests.
In my memorandum of January 19, 1984, I outlined three final tests to be conducted at NTS. The tests have been completed and the preliminary results from the program will be made available to you as soon as it becomes available.
Upon the coe:oletion of the program, John Larkins visited the facility.to preview the Tesults of the final _ tests and to make ~ plans for a final _ report.
During the visit he made certain observations which we feel a t worthwhile to i
bring to your attention.
In viewing the videocassette recordings of these experiments it was noted that at relatively high hydrogen concentrations, representative of approximately 75 metal-water reaction, E13% H with 30%
7 steam and 13% M, with sprays and fans) the cables burned eytensively, both during the hydrbgen gas burn and afterwards. Post test examination revealed extensive charring, pitting,. cracking and holes where a metallic surface was clearly visible. The first conclusion was that the metallic surfaces were i
exposed conductor, however, after later discussions with EPRI, it was concluded
- that the surface was probably metallic braids or metallic paper.
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A team from'EPRI, utili y representatives, Westingho The A brief trip report from SANDIA is enclosed.
in the various~ tests.
consensus from this team was that in none of the cable samples was metal conductor visible. ' The actual testing of the cable conductor and insulator f
d will be done over the next six weeks or so and at that time we w
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EPRI will as to the functional capabilities of the conductor and insulation.
17, 1984. Also a provide a qualitative quick-look report on or about FebruaryIf-you desire more VCR tape is available of these last series of experiments.info
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please call me or John Larkins (X74478).
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Robert T. Curtis, Chief Containment Systems Research Branch
Enclosure:
As stated cc:, R. Minogue, RES D. Ross, RES
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