ML19224D159
| ML19224D159 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/31/1979 |
| From: | Mckinley J Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML19224D160 | List: |
| References | |
| ACRS-SM-0131, ACRS-SM-131, NUDOCS 7907110011 | |
| Download: ML19224D159 (3) | |
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A Recoq'o, UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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c ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
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gh WASHINGTON, C. C. 20555 s,
May 31, 1979 ACRS Members T'il-2, MICHELSON's SMALL BREAK ANALYSIS Attached for your information are copies of a news clip, NRC statement, NRC memo, and Congressional Subcommittee transcript relating as to when the NRC first had access to, Mr. Michelson's small break analysis of B&W reactors.
It appears that Mr. Michelson prepared a long hand draft in September 1977, and provided copies of it to Mr. J. Ebersole at about that time. Mr. Ebersole apparently provided a copy to the NRC (Sandy Israel) in October 1977. The NRC circulated an internal memo within the Reactor Safety Branch on the sub-ject of possible unreliability of pressurizer level indication in January 1978.
Copies of the long hand drafts of the analyses for both B&W and CE are on file in the ACRS office.
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Project Review BrMch No.1 Attachments :
As Stated.
cc: ACRS Technical Staff C. Michelson W. Lipinski I. Catton W. Stratton 200 047 790711cm\\
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e The attached explanat6cn of NRC receipt of and reaction to your
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d byx at the direction of P.oger Mattson.
' 1 concerns was prepareixixx I am also enclosing articles apeaaring in today's Post and Times,L k
.._.. based in part.on. yesterday's hearing.
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-mentyesterday at the United states Cowtnouse m auma.
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v Experts Reportedly Knew afFlaw in Reactors
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'g De mernorandum disclosing the com.
Re disclosure of the commission's a;>
mission staff's knowledge of-Mr. Michel.
j By D VID'BURNHAM - - ~~
i parent inaction came as the Intenor son's warning was wntten by T. M.
Oc s>ammmne versnm ~ T -
Committee heard testirnony,from Bab. Novat head of the-Reactor. System 8
' ** ' WASHINGTON; May-24 Nuclear cock & Wilcox, the company that made Branch, on Jan. 10,1718. He warned that y.
, Y.1 safety experts in the Government knew the Three Mile Island reactor; General under certain spec ai l circumstances in
' de )' that Babcock & Wilcox reactors had anl upcrtent engineering flaw more than a theutilitythatownedan opera et dit,and. the cooling systems in Babcock & Wilcox Public Utilities, the parent company of k'i plants. ** additional loss of prirnary sys.
d
,]' [f.<' year before that flaw played a crttical several tnd'.istry groups.
tem inventcry or shrinkage in the pri.
part in the Mar:h 23 accident at Bree The initial warring about the flaw in mary system may not be indicated by
^.h - Mile Island, accordmg to a report ob. the reactors came, from Carl Mienelson, a prcssuruer level."
il tained by the House Interior Committee.
nuclear safety expert with the Tennessee Valley Authonty,in! ate lFTT.
Noting that such an accident had al. I Despite this knowledge, said Repre-Mr. Udall said that the commit;ee had ready occurred at the Davis Besse reac.
sentative Morris K. Udall, the commit-just received evidence frcrn the commis tor near Toledo, Obin, Mr. Novak recom-1d tee's chairman _ the staff of the Nuctear sion that "by early 1978 the N.R.C. had mended that the regulatcr'/ commission t4 Regulatory Commission did not recom-received Mr. Michelson's paper and had consider possible design changes in the mend any changes to correct the problem in Babcoch & Wilcox reactors that were accepted one of his pnnciple theses, that reactors not yet under construction and
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is, that the pressuruer water level was procedural reviews of reactors under
- . 4 Mr. Udall, an Arizona Democrat, said not a reliable indication of the reactor consideration for receiving operating 11-operating then. y 3}-
that if such tormat warnings had been pressura vessel being full of cooling censes' 8
de no mmen on
-4 made by the commission "it is likely that water *"
k&w
,9 False Signals Clted N
the Three Mile island incident,,would Acenrding to the prehminary repor* of were then generatmg electricity.
have been a run.cf-the. mill event-events leading to the March 23 accident Herman M. Dieckamp, president of Investigations Under Way at the Three Mile Isfand reactor, the false General Public Utilities, the holdin g corn.
signals g2ven the operators about the In a memcrandu:n to the committee; amount of water in the reactor prompted pany for the Metropolitan Edison Compa.
Victor Gilinsky, acting chairman of the them to shut off the high pressure injec.
ny, which owns the Three Mile Island I reactor near Harnsburg, Pa., said that commission, said that the commission's. tion pumps, thus uncovering the uramum this was the, first he had heard of the con.
handling of the matter was now being ex. fuel rods and causing senous damage, tents of the warning about his reactor.
..L amined by two separate Lovestigatmg o;, from overheatmg.
fices withinthe commission.
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