ML19319D069
| ML19319D069 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point, Crystal River  |
| Issue date: | 11/24/1970 |
| From: | Beratan L US ATOMIC ENERGY COMMISSION (AEC) |
| To: | James O'Reilly US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19319D056 | List: |
| References | |
| NUDOCS 8003040985 | |
| Download: ML19319D069 (2) | |
Text
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I e-se NOV 2 41970 J. F. O'Reilly, Chief, Reactor Inspection & Enforcement Branch, C0 TERU:
H. R. Denton, Chief, Technical support Braneh, C0 Sort AGGERGATE AT CRISTAL RIME DOCERT NO. 50-302 During an assist inspection of the above facility, as noted that the aggregate to be need in the construccian of the prestressed coserete containment beilding is not too disaisilar from the oolita aggressee used la the construction of Turkey Point. In om view, the cracking of the does at Turkey Point 3 may la part be attributable to the poor gus11ty of such aggregate.
Further, the design of the Crystal River containamat requires the use of 163 wire tendosa tensioned to approminately 900 taas per tendon as compared to 90 wire * * = tensioned to appronimately 425 tons at Turkey Point.
In view of the above factors, a potential for lares creep deformations
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any esist. This coald result in relamation of the tendoos as well as eacessive deformation in the concrete. We sagenst that these concerns be referred to DEL for possible action, since consideratica and res-olution may be possible at a relatively early stage of construction.
leos L. Beracan Senior Structural Engineer, Technical support Branch, cc ec:
A. Giesbusse, CO L. Karablith,CO R. H. Engelhas CO F. J. Long, CO:II
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J. P.10'Reilly, Chief Reactor Inspection & Enforcement Branch,.C0 THRU: - H. R. Denton, Chief, Technical Support Branch, CO-SOFT ACGREGATE AT CRYSTAL RIVER i
DOCKET No. 50-302
-l During an assist inspection of the above facility, we noted that i
the aggregate to be used in the construction of the prestressed concrate containment building is not too' dissimilar from the colite I
aggregate used in the construction of Turkey Point. In our view, the cracking of the dome at Turkey Point 3 may in part be attributable to the poor quality of such aggregate.
Further, the design of the Crystal River containment requires the use of 163 wire tendons tensioned to approximately 900 tons per tendon as compared to 90 wire tendons tensioned to approximately 425 tons at Turkey Point.
In view of the above factors, a potential for large creep deformations may exist. This could result in relaxation of the tendons as well as excessive deformation in the concrete., We suggest that these concerns be referred to DRL for possible action, since consideration and resolution may be possible at a relatively early stage of construction.
Leon L. Beratan Senior Structural Engineer Technical Support Branch, CO cc:
A. Giambusso L. Kornblith, Jr.
R. H. Engelken F. J. Long, 00:II O
.