ML20127F126
| ML20127F126 | |
| Person / Time | |
|---|---|
| Issue date: | 01/11/1985 |
| From: | Speis T Office of Nuclear Reactor Regulation |
| To: | Ross D NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML20127C753 | List: |
| References | |
| FOIA-84-928 NUDOCS 8506250040 | |
| Download: ML20127F126 (31) | |
Text
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UNITED STATES
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( . . ..O %. o January 11, 1985 llEMORANDUM FOR: Denwood F. Ross, Deputy Director ,
Office of Nuclear Regulatory Research FROM: Themis P. Speis, Director Division of Safety Technology Office of Nuclear Reactor Regulation
SUBJECT:
SEVERE ACCIDENT ISSUE PAPERS 1.2.1 and 1.2.5 On May 4, 1984, I sent you seven of the nine severe accident issue papers related to loading of the containment building. The remaining two papers are attached. They are issue p' apers 1.2.1, " Containment Thermal and Hydraulic Behavior," and 1.2.5, " Likelihood and Magnitude of Ex-Vessel Steam Explosions or Steam Spikes."
As I pointed out in my May 4 memo, I regard these issue papers as evolving documents, subject to change as our understanding of containment loads improves. -
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Themis P. Speis, Director
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Division of Safety Technology Office of Nuclear Reactor Regulation ,
Enclosure:
Issue Papers 1.2.1 & 1.2.5 cc: G. Marino, RES M. Cunningham O. Bassett M. Silberberg
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April 17, 1984 .x a Containment Systems' Research Branch - Weekly Report u
The first High Pressure Melt Ejection test into a water filled cavity, was conducted at SNL on April 11, 1984. 80 Kg of thermite was ejected from a vessel pressurized to 1500 psig by nitrogen gas into a 1/10 linear scale concrete reactor cavity that was filled to the top with water.
Upon ejection, the melt interacted violently with water, pressurized the cavity to about 500 psig and blew out the bottom of the concrete cavity.
The rest of the cavity was lifted and turned up to stand on its end.
Water slugs containing. quenched debris were ejected out of the keyway, and hurled as far as 100 ft away, followed by the melt. Helt dispersion took place mostly after the failure of the bottom of the cavity.
Detailed evaluation of the test data is underway and the report is expected in a few weeks.
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