ML20127B089
| ML20127B089 | |
| Person / Time | |
|---|---|
| Issue date: | 12/06/1983 |
| From: | Costello J NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Arlotto G NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML18092B591 | List: |
| References | |
| FOIA-84-940 NUDOCS 8312190084 | |
| Download: ML20127B089 (3) | |
Text
'
- #* UNITED STATES 4o o
. . *g NUCLEAR REGULATORY COMMISSION y j W ASHINGTON. D. C. 20555 e ,
. DEC 6 1983 MEMORANDUM FOR: Distribution i
FROM: J. F. Costello Mechanical / Structural Engineering Branch Division of Engineering Technology, RES
SUBJECT:
SMALL STEEL CONTAINMENT EXPERIMENT Model SC-3, the last in the series of tests on small steel containment models, was pressurized to failure on December 2, 1983. The enclosure shows the geometry of the small model series. Model SC-3 was designed to check the fidelity of analytical predictions of behavior in the vicinity of large penetrations. It included geometrically accurate representations of an equipment hatch and two personnel locks, including reinforcement around the penetrations.
Pressure testing began on November 30. While still in the elastic range, at 50 psig, the equipment hatch closure buckled in a " snap-through" mode. This was anticipated, although at higher pressure. Then, to preclude premature failure by tearing of the closure, a heavy cover plate was welded over the hatch.
Pressure testing was resumed on December 2. Membrane yielding began at around 80 psig and was clearly evident at 85 psig. After about 30 minutes at 120 psig, the model seemed to have stablized and measurements were initiated. During the measurements, the vessel failed explosively. The hoop strain was 14 per cent.
The last complete set of data was that taken at 115 psig.
Preliminary indications are that failure initiated in regions of strain concentration around the major penetration, but that remains to be verified.
A more complete report will be available when the data have been reduced.
Jans F. Co ello Mechanical / Structural Engineering Branch Division of Engineering Technology, RES
Enclosure:
Sketch of Models
~
qw [Pff M ? H D' '
i
...'1,2 1
~~
b.
l i.
+ + i, .
+
i 1
n .
65.75 In.
Da
- !N 1
g s
t f Sc-3 P .
L 46.1 in. M S C - 2_ '
RfMG REINFORCED SHELL WITH CLEAN SHELL PENETRATIONS f^
SHELL SC-1, 1 1/32 SCALE STEEL MODELS 1
l
n
. c*.* .
DEC D E Memorandum for Distribution Dated G. A. Arlotto, RES L. C. Shao, RES J. E. Richardson, RES J. J. Burns, RES H. Ashar, RES B. S. Browzin, RES E. G. Arndt, RES W. E. Campbell, RES W. F. Farmer, RES D. F. Ross, RES J. T. Larkins, RES M. A. Cunningham, RES M. Silberberg, STP0 P. K. Niyogi, STP0 G. E. Lear, NRR D. C. Jeng, NRR P. T. Kuo, NRR C. P. Tan, NRR G. Bagchi, NRR P. M. Williams, NRR R. R. Newton, NRR J. Shapaker, NRR Y. S. Huang, NRR E. Igne, ACRS
.