ML20009B439
| ML20009B439 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/26/1981 |
| From: | Chilk S NRC OFFICE OF THE SECRETARY (SECY) |
| To: | NRC OFFICE OF THE SECRETARY (SECY) |
| References | |
| REF-10CFR9.7 M810624, NUDOCS 8107150450 | |
| Download: ML20009B439 (1) | |
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IN RESPONSE, PLEASE REFER T0: M810624
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WASHINGTON, D.C. 20555 June 26,1981 CFFICE OF THE 9
SECRETARY
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MEMORANDUM FOR THE RECORD g pg FROM:
Samuel J. Chilk, Secreta N
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SUBJECT:
STAFF REQUIREMENTS - COMM ON MEETING ON MCGUIRE, 2:10 P.M.,
WEDNESDAY, JUNE 24, 1981. COMMISSIONERS' CONFERENCE ROOM, D.C. OFFICE (OPENTOPUBLICATTENDANCE)
The Commission was briefed by J. Michael McGarry and William Porter (Duke Power Co.); Edward G. Ketchen and Joseph Scinto (NRC); and Jesse Riley (CESG), parties to the McGuire operating license proceeding.
The Comission had asked the parties to address the following questions:
1.
In view of the fact that substantial quantities of hydrogen were evolved during 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 energizing 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 operation of air return fans and the hydrogen skimmer fans in conjunction with the igniters, is it reasonable 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 skimer fans at containment pressures less than 3 psig without the possibility of negative containment pressure or other adverse factors?
'y Exec Dir for Operations ASLBP
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