ML19308B300
| ML19308B300 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/28/1979 |
| From: | Chandler L NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD) |
| To: | Buck J, Johnson W, Rosenthal A NRC ATOMIC SAFETY & LICENSING APPEAL PANEL (ASLAP) |
| References | |
| NUDOCS 7912280319 | |
| Download: ML19308B300 (2) | |
Text
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,,&T UNITED STATES
',g NUCLEAR REGULATORY COMMISSION
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WASHINGTON. D. C. 20555 g (,y
%,f...sl November 28, 1979 Alan S. Rosenthal, Esq., Chairman Dr. John H. Buck Atomic Safety and Licensing Appeal Atomic Safety and Licensing Appeal Board Board U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Washington, D. C.
20555 Washington, D.C.
20555 Dr. W. Reed Johnson Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Washington, D.C.
20555 In the Matter of Metropolitan Edison Company, et al.
(Three Mile Island Nuclear Station, Unit 2)
Docket No. 50-320 Gentlemen:
In reviewing the transcripts of the December 1978 hearing on the aircraft crash probability i; sue, it appears that page 15 of the testimony of Darrell G. Eisenhut (following Tr. 469) is missing. Although I believe that the copies of Mr. Eisenhut's testimony which were prefiled with the Appeal Board and parties do have that page, to assure that the record is complete, a copy is enclosed.
Sincerely, till hit
?ii (i?
t
, Lawrence J. Charidler Counsel for NRC Staff
Enclosure:
As stated cc w/ enc 1:
Service List 3 912 280 h/7
.. ' total
[(CxNxA) landings (CxNxA) takeoffs 3
=
scheduled (CxNd) takeoffs 3
[(CxNxA) landings
+
+
non-scheduled Putting in the values yields:
[(2.3 x 10~9)(39)(.0062) + (3.3 x 10-9)(21)(.0026)]
Ptotal
=
[(4.4 x 10-8)(59)(.0062) + (2.1 x 10-8)(32)(.0026)]
+
[0.056 x 10-8 +.018 x 10-8 + 1.57 x 10-8 + 0.17 x 10-83
=
P 1.8 x 10~0/yr total
=
As described earlier, this value is based on the assumption that there are approximately 600 movements of " heavy" aircraft at the Harrisburg Airport.
6.0 Conclusions i
The Staff has evaluated the likelihood of a heavy aircraft attempting to either land or takeoff and crashing into the Three Mile Island nuclear facility. This evaluation was based on last year's (1977) record of operaticns which showed about 600 movements of such heavy aircraft (200,000 pounds).
We can calculate that the number of heavy operations can increase by a factor of about 5 to 6 and still' have a crash probability that is no greater than about 1 x 10-7/yr, i.e., the number of heavy operations at b
h e
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