ML19224B937
| ML19224B937 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/18/1979 |
| From: | Milstead W Office of Nuclear Reactor Regulation |
| To: | Mosely N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 7906280043 | |
| Download: ML19224B937 (1) | |
Text
f ROUTING AND TRANSMITTAL SUP JUN 19 tyg TO: (Name, office symbol, room number, initials Date bunding, Agency / Post) 2.
NRC PDR f
Assessions Unit (P-50) 2 3.
4.
S.
Action File Note and Return Approval For Clearance Per Conversation As Requested For Correction Prepare Reply ICircutate For Your Informat!on See Me Comment investigste Signature Coordination Justify REMARKS TO BE PLACED IN NRC PDR 6
DO NOT use this form as a RECORD of approvals, concurrences, disposats, clearances, and similar actions FROM: (Name, org. symbof, Agency / Post)
Room No.- 8:dg.
l P-ll22B l
Robert L. Tedesco, L Task Force,
Phone No.
1 Tt1I-2
, X28090 W i-102 OFTIONAL FORM 41 (Rev. 7-76)
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UNITED STATC y 'g s., 8 i NUCLEAR REGULATORY CCidMISSION
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C WASHING TON. D. C. 20555 f
ju,y 181373 MEMORANDUM FOR:
F. C. Mosely, Director, Division of Reactor Operations Inspection, IE FROM:
W. C. Milstead, Lessons Learned Task Force
SUBJECT:
RE')UEST FOR INFORMATION REGARDING HYDR 0 GEN EXPLOSION AT TMI-2 At about 2:00 pm on March 28,1979, TMI-2 containment pressure rapidly increased to about 28 psig and was rapidly reduced to the initial pressure (2 psig). On page 5 of the TMI staff interview of Craig Faust conducted at 14:00 hours on April 6,1979 by T. Van Whitbeck, et dl. Mr. Faust stated we probably had some kind of explosion because that is what-it looked like; shock waves."
The only record we have seen of the 28 psig pressure spike which appears to be a hydrogen fire or explosion is on a graph for which the time scale is 1/2 inch equals 60 minutes.
Using the information from this figure, in my judgement I cannot tell whether the recorded pressure spike was caused by a fire or an explosion. Mr. Faust's statement seems to indicate that some containment pressure measurements showed pulsations not present on the trace I have seen.
If such is the case I would like a description of the behavior of containment pressure preferably a copy of a figure of the containment pressure vs. time showing oscilldtory behavior, if it exists.
Information which may provide insight to the manner of hydrogen combustion in the containment will be useful in evaluating the current design capability of post accident containment, combustible gn control systems and determining the need for changes in design requirements.'or future application.
My
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request is consistent with the goals of IE's investigation expressed in Mr. Davis' letter of April 20, 1979 to the Comission.
Thank ye,
u n w
,Is Learned Tark Force William Milstead, Less Con:ainment System.: Branch Division of Systems Safety cc:
R. Mattson R. Tedesco R. Ireland W. Butler J. Kudrick
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