ML20009A735
| ML20009A735 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/23/1981 |
| From: | Bickwit L NRC OFFICE OF THE GENERAL COUNSEL (OGC) |
| To: | Ketchen E NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD) |
| Shared Package | |
| ML20009A733 | List: |
| References | |
| REF-10CFR9.7 NUDOCS 8107140044 | |
| Download: ML20009A735 (1) | |
Text
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UNITED STATES
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June 23, 1981
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sp Edward G. Ketchen, Esq.
di 30 Counsel for NRC Regulatory Staff office of the Executi.ve Legal Director U.S. Nuclear Regulatory Commissio-Washington, D.C.
20555
Dear Mr. Ketchen:
The Commission has scheduled an open meeting for Wednesday, June 24, 1981 at 2:00 p.m. as part of its consideration whether the Licensing Board's May 25, 1981 decision should become effective.
At this meeting the Commission requests that the parties address orally the following. questions:
1.
In view of the fact that substantial quantities of hydrogen were evolved duri.ng the TMI accident before containment pressure significantly exceeded 3 psig, what is the basis for selecting the 3 psig containment pressure signal as the appropriate trigger for energining the igniter system?
Should the trigger instead be safety injection?
2.
In view of the fact that the effectiveness of the hydrogen control system depends in part on opera-tion of air return fans and the hydrogen skimmer fans in conjunction with the igniters, is it rea-sonable to switch on the igniters at a lower pressure than the trigger set point for the air return fans and the hydrogen skimmer fans?
Is it feasible to switch on the air return fans and hydrogen skimmer fans at containment pressures less than 3 psig without the possibility of nega-tive containment pressure or other adverse factors?
Sincerely, 0
u.
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O*.
O Leonard Bickwit, Jr.
General Counsel i
8107140044 810624 PDR ADOCK 05000369 PDR r
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