ML20010A516
| ML20010A516 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/07/1981 |
| From: | Kelley J Atomic Safety and Licensing Board Panel |
| To: | NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD), SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| ISSUANCES-OL, NUDOCS 8108110499 | |
| Download: ML20010A516 (3) | |
Text
LNITED STATES OF A M ICA t~
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NUCLEAR REGULA'IORY COMMISSION g
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ATOMIC SAFErY AND LICENSING B3ARD k,
M AUG 101981, 7 BEFORE ADMINISTRATIVE JUDGES
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c!E:3 f the Secretary, '//
James L. Kelley, Chairman 00:Mting A SCRkt had Elizabeth B. Johnson g
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URM AUG1o gg In the Matter of
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Docket Nos. 50-361-OL
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50-362-OL SOUIEERN CALIFORNIA EDISON (DMPANY,
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' /,3 (San Onofre Nuclear Generating d\\
f Gtation, Units 2 and 3)
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August 7, 1981 C
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ORDER O'
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(Modifying an Issue Concerning 0
6 Earthquakes and Emergency Planning) x Q
At the time of-our filing of July 29, 1981, the Board had in hand the June 11, 1981 menorandum to'it from Darrell G. Eisenhut of the NRC Tha' memorandum transmitted to us a copy of the May 13, 1981 letter Staff.
e from Fobert L, Tedesco of the NRC Staff to Mr. Robert Dietch arx3 3/. D. W.
Gilman (Vice-Presidents of Southern California Edison Company and San Diego Gas and Electric Company, respectively). That letter set forth in detail
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the Staff's view of the matters to be considered by the Applicants concerning the evaluation of the effect of earthquakes on their emergency ple.s. Specifically, the Board ruted that the Applicants were told, "For purposes of this evaluation, as a planning " basis you may assume that the plant experiences earthquake effects no nore severe than the Safe Shutdown Earthquake." The Board Order of July 29, 1981 stated our reasons for DSO3 i
S Instulating an earthquake in excess of the SSE and we are rot swayed from
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that position.
l 8108110499 810807 PDR ADOCK 05000361 L
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We have listened to oral arguments (nncerning our Order and have received written memoranda frm the parties. Our concerns still focus upon the questions we raised in the Order, namely, "What steps could be taken by the Applicants and responding jurisdictions to carry out evacuation in a timely manner and/or protect those in the EPZ pending evacuation" following a damaging earthquake.
It row appears, however, that the Board order of July 29,1981 may have posed such severe consequences resulting frcm the hypothesized earthquake that evacuation and/or protection of those in the EPZ would be virtually inpossible. 'Ihat was not our intention. The Board's intent was a site specific inquiry to examine the inpact of a major earthquake, acconpanied by a radioactive release, upon the emergency plans. The Board does not know what magnitude earthquake would be required to cause a
" breach of containment" and " collapse of br'-3ges and overpasses aM surface breaks rendering the highways tenporarily impassable." We therefore present the following revised issue:
Assume s major earthquake in the SONGS area. This assumed earthquake causes extensive structural damage to the facility, to communications, to highways designated as evacuation routes, and is accompanied by radiological releases requiring evacuation in the plume exposure pathway of the EPZ.
In these circumstances what steps could be taken by the applicants and responding jurisdictions to carry out evacuation in a timely manner and/or protect those in the EPZ pending evacuation? What federal resources, including military resources, could be brought in to assist in this situation, and how would federal assistance be accomplished?
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In posing the foregoing the Board wishes to learn what the physical consequences of earthquakes, in a scale of increasing severity beyond the SSE, would be upon the emergency plans as 'they relate to comunications and evacuations up to some presumed point where evacuation would become a physical impossibility in any reasonable time frame. A point of beginning should relate to the presumed consequences of an SSE magnitude earthquake upon evacuation and the necessary related comunications and highways.
Pursuant to the Staff's earlier instructions, planning for such an earthquake presumably either is conplete or in progress. Sequentially, from that level of planning, we wish to examine a presumed conseipences of a series of increasingly nore severe earthquai,e as they relate to the emergency plans. Our questions are designed only to test the adequacy of the emergency plans and to determine whether there is reasonable assurance that adequate protective measures can and will be taken at SOtG in the event of a major earthquake accompanied by radiological releases severe enough to initiate the targaacy evacuation plan.
FOR THE ATOMIC SAFETY AND LICENSIIG BOARD M) 3 Jamep L. Kelley, Chairman AdK41NISTRATIVE JUDGE Dated at Bethesda, Maryland this 7th day of August 1981.
cc: Chairman Palladino Comissioner Gilinsky Cbmissioner Bradford Comissioner Ahearne D onard Bickwit, Jr., GC