ML19256D120
| ML19256D120 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/07/1969 |
| From: | Ross D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7910170579 | |
| Download: ML19256D120 (3) | |
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ATOMIC ENERGY COMMISSION
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%,,,,,,,.. f April 7, 1969 Roger S. Boyd, Assistant Director, Reactor Projects Division of Reactor Licensing THRU: Che.les G. Leng, Chief, Reactor Projects Branch 3 4.t-l D:.tision of Reactor Licensing MELTING WITH METROPOLITAN EDISON CCMPANY ON THREE MILE ISLAND UNIT NO.1 (DOCKET 50-289)
We met with representatives of Metropolitan Edison Company and Gilbert Associates, A/E for the Three Mile Island Unit No.1, en March 26, 1969 A list of attendees is enclosed. The purpose was to discuss the progress of design on aircraft impact resistance.
We had expressed in our letter to Met-Ed dated February 5,1969 an interest in reviewag the preliminary design when available. Met-Ed requested the subject meeting to review the status of design.
GAI had made available a syncpsis of their methods to serve as a meeting agenda. They calculated the time sequences for dynamic leading, and dynamic lead factors. They calculated deflections for an impact en the containment deme, and at the side wall ring-girder point, and at a point down the side vall. GAI considered that prestressing was continuously available during the course of the crash. Duane Godfrey of GAI sketched the preliminary design of the control room. The ficor slab will be ficating, in that horizontal motien of the adjacent vall vill not be transmitted to the floor.
We made the following observatiens based on the limited information available:
1.
Consideration should be given to improved liner anchor methods in the dcme regien, to counter possible spalling affects.
2.
Consideration should be given to the likelihood and consequences of loss of prestress tendcas or anchors during the impact.
3 The details of flat-slab vall reinforcing should be provided.
h.
A fim conclusien should be reached en spalling protection.
5 The structures that will be hardened shculd be clearly defined.
6.
Ccnclusions and bases en the adequacy of design should be stated.
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Ecger 3. Scyd April 7,1969 In ecnclusien we stated, as in cur February 5,1969 letter, that cur review of this tcpic cn a timely basis (i.e. as available ) cculd reduce delays at the POL review. In a=plificatica ve notified Met-Ed that the decisicn to file supplemental informatica on aircraft impact design was theirs, and that nothing expressed or implied by DRL =ade it mandatory to supply the infor=ation in advance of the POL application.
9FPA D. F. Ross Reactor Projects Branch 3 Division of Reactor Licensing
Enclosure:
Attendance List Distribution:
P. A. Merris F. Schreeder S. Levine R. DeYeung C. G. Long D. F. Ross R. R. Powell A. L. Gluckmann E. G. Arndt DRL 3 ranch Chiefs DRL Reading Decket RFB-3 Reading i446 202 P00R ORIGINAL
LIST OF ATIEEEES DEL L. F. Ross E. G. Arndt A. L. Gluckmann C. G. Long R. R. Powell ACRS J. E. Eard Gilbert Associates, Inc H. Young D. K. Crcneterger C. W. Lin D. A. Gcdfrey F. W. Symons C. H. Bitting Metropolitan Edison J. G. Miller G. F. Bierman General Public Utilities R.
W. Hewarl, Jr Pickard, Lcwe Associates K. Woodard (h
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o J. F. Newell The present plan is for a site elevation of 304 feet, with the levee running south far enough to keep out any water above this level. The applicant's calculational W a1 produces a drop o* 10 feet along the length of Three Mile Island, which appears to be very high to Mr. Meyer and to the writer, in view of the three vide ah=-1s available in this reach of the river. Eence, some additional work may need to be done to establish the rate of drop in the river along the islanr, to insure that the site cannot be flooded from the south.
Mr. McIenore gave us printouts for computer runs starting with the river level at both 268 and 295 feet just upstream of York Haven Dam. These levels are supposed to correspond to flows of 750,000 and 1,100,000 cfs, respectively. The printouts also listed the effective bottout elevations, flow areas, ete, used for eseh of the three river channais. Mr. Meyer is evaluating this and the river bottout profiles in this reach.
The day before the site visit a minor tornado pe= mad within a mile of the site. It apparently was above the ground most of the time, since damage was spotty and sometimes eccfined to high ground.
Dist11bution:
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