ML19331A160
| ML19331A160 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 12/13/1971 |
| From: | Like I REILLY & LIKE |
| To: | Murphy A Atomic Safety and Licensing Board Panel |
| Shared Package | |
| ML19331A165 | List: |
| References | |
| NUDOCS 8006110595 | |
| Download: ML19331A160 (2) | |
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- December 23, 1971
- Hon. Arthur W. Murphy, Chairman Atomic Safety and Licensing Board Columbia University School of Law Box 38, 435 West 116th Street New York, N.Y. 10027 Re: In the Matter of Consumers Power Company Midland Plant, Units 1 and 2 Docket Nos. 50-329 and 50-330
Dear Professor Murphy:
Mapleton intervenors herewith serve the testimony of Richard Webb and Dr. Orie L. Loucks.
We respectfully request until December 31, 1971 to serve the testimony of:
1 - Dr. Richard Maerietto (St. Thomas College, St. Paul, Minnesota) on the effects of low level radiation 2 - Dr. Ernest Sternglass (University of Pittsburgh) on the effects on human health of low level radiation from nuclear fission reactors 3 - Carlos E. Vogel, P.E. on electro-magnetic impulse 4 - Prof. R. L. htitelaw (Professor of Nuclear &
Mech. Eng., V.P.I.) who wishes to raise the following questions:
a) What is the probability of an explosive rupture of i
the reactor vessel or of large elements of the primary loop, resulting in flying parts at high velocity and momentum 71.e. can it be shown that such a failure has i
never happened in the history of high pressure vessels, f
or is extremely unlikely today?
b) What is the probability of a failure in the reactor vessel head bolts, or in the control rod head nozzles
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THIS DOCUMENT CONTAINS P00R QUALITY PAGES W
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Ranur. Liza amo Semusiosu December 13, 1971 Hon. Arthur W. Murphy, Chairman Atomic Safety and Licensing Board 2
or retention bolts that would result in the entire head or a control rod drive being ejected upward at high velocity? Has such a failure ever happened yet?
c) Is there a conceivable conbination of events or combination of failures in the control rod drive sys-tem that could permit the reactor pressure to drive a rod upwards at high velocity sufficient to rupture and keep on going?
d) What is the probability Ebat any of the flying parts in any of the three failures above would rupture either
- 1) the wall of the containment vessel, or 2) one of the vulnerable points in the containment, such as a pene-tration bellows?
e) During the expected operating life of the reactor vessel, will the embrittlement of its steel due to radiation increase the probability of the failures above? If so, by how much? What is this operating life? What is the latest embrittlement (NDT) data to support this conclusion?
f) Is it possible for the safety injection system to subject the reactor vessel to thermal shock, so that it would be unsafe to operate again? What is the maximum local cooling rate the steel might experience in this event?
g) An explcsive rupture of the steam turbine high pressure or cross-over piping or casings can occur, as it has in other power stations. It can cause or be associated with a generator failure and consequent hydo-gen fire. Can such an explosion and fire in any way result in a rupture of the containment ves.sel? Or could suen a sequence be a logical consequence of a non-explosive primary system failure inside the containment vessel?
espect ully yours REILLY, LIKE & SCHN IDER IL:mc
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ng Lik copy to:
ASLB members Secretary All Counsel of record
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